1 #include "qemu/osdep.h"
5 #include "exec/gdbstub.h"
6 #include "exec/helper-proto.h"
7 #include "qemu/host-utils.h"
8 #include "sysemu/arch_init.h"
9 #include "sysemu/sysemu.h"
10 #include "qemu/bitops.h"
11 #include "qemu/crc32c.h"
12 #include "exec/exec-all.h"
13 #include "exec/cpu_ldst.h"
15 #include <zlib.h> /* For crc32 */
16 #include "exec/semihost.h"
17 #include "sysemu/kvm.h"
19 #define ARM_CPU_FREQ 1000000000 /* FIXME: 1 GHz, should be configurable */
21 #ifndef CONFIG_USER_ONLY
22 /* Cacheability and shareability attributes for a memory access */
23 typedef struct ARMCacheAttrs
{
24 unsigned int attrs
:8; /* as in the MAIR register encoding */
25 unsigned int shareability
:2; /* as in the SH field of the VMSAv8-64 PTEs */
28 static bool get_phys_addr(CPUARMState
*env
, target_ulong address
,
29 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
30 hwaddr
*phys_ptr
, MemTxAttrs
*attrs
, int *prot
,
31 target_ulong
*page_size
, uint32_t *fsr
,
32 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
);
34 static bool get_phys_addr_lpae(CPUARMState
*env
, target_ulong address
,
35 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
36 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
, int *prot
,
37 target_ulong
*page_size_ptr
, uint32_t *fsr
,
38 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
);
40 /* Security attributes for an address, as returned by v8m_security_lookup. */
41 typedef struct V8M_SAttributes
{
50 static void v8m_security_lookup(CPUARMState
*env
, uint32_t address
,
51 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
52 V8M_SAttributes
*sattrs
);
54 /* Definitions for the PMCCNTR and PMCR registers */
60 static int vfp_gdb_get_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
64 /* VFP data registers are always little-endian. */
65 nregs
= arm_feature(env
, ARM_FEATURE_VFP3
) ? 32 : 16;
67 stfq_le_p(buf
, env
->vfp
.regs
[reg
]);
70 if (arm_feature(env
, ARM_FEATURE_NEON
)) {
71 /* Aliases for Q regs. */
74 stfq_le_p(buf
, env
->vfp
.regs
[(reg
- 32) * 2]);
75 stfq_le_p(buf
+ 8, env
->vfp
.regs
[(reg
- 32) * 2 + 1]);
79 switch (reg
- nregs
) {
80 case 0: stl_p(buf
, env
->vfp
.xregs
[ARM_VFP_FPSID
]); return 4;
81 case 1: stl_p(buf
, env
->vfp
.xregs
[ARM_VFP_FPSCR
]); return 4;
82 case 2: stl_p(buf
, env
->vfp
.xregs
[ARM_VFP_FPEXC
]); return 4;
87 static int vfp_gdb_set_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
91 nregs
= arm_feature(env
, ARM_FEATURE_VFP3
) ? 32 : 16;
93 env
->vfp
.regs
[reg
] = ldfq_le_p(buf
);
96 if (arm_feature(env
, ARM_FEATURE_NEON
)) {
99 env
->vfp
.regs
[(reg
- 32) * 2] = ldfq_le_p(buf
);
100 env
->vfp
.regs
[(reg
- 32) * 2 + 1] = ldfq_le_p(buf
+ 8);
104 switch (reg
- nregs
) {
105 case 0: env
->vfp
.xregs
[ARM_VFP_FPSID
] = ldl_p(buf
); return 4;
106 case 1: env
->vfp
.xregs
[ARM_VFP_FPSCR
] = ldl_p(buf
); return 4;
107 case 2: env
->vfp
.xregs
[ARM_VFP_FPEXC
] = ldl_p(buf
) & (1 << 30); return 4;
112 static int aarch64_fpu_gdb_get_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
116 /* 128 bit FP register */
117 stfq_le_p(buf
, env
->vfp
.regs
[reg
* 2]);
118 stfq_le_p(buf
+ 8, env
->vfp
.regs
[reg
* 2 + 1]);
122 stl_p(buf
, vfp_get_fpsr(env
));
126 stl_p(buf
, vfp_get_fpcr(env
));
133 static int aarch64_fpu_gdb_set_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
137 /* 128 bit FP register */
138 env
->vfp
.regs
[reg
* 2] = ldfq_le_p(buf
);
139 env
->vfp
.regs
[reg
* 2 + 1] = ldfq_le_p(buf
+ 8);
143 vfp_set_fpsr(env
, ldl_p(buf
));
147 vfp_set_fpcr(env
, ldl_p(buf
));
154 static uint64_t raw_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
156 assert(ri
->fieldoffset
);
157 if (cpreg_field_is_64bit(ri
)) {
158 return CPREG_FIELD64(env
, ri
);
160 return CPREG_FIELD32(env
, ri
);
164 static void raw_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
167 assert(ri
->fieldoffset
);
168 if (cpreg_field_is_64bit(ri
)) {
169 CPREG_FIELD64(env
, ri
) = value
;
171 CPREG_FIELD32(env
, ri
) = value
;
175 static void *raw_ptr(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
177 return (char *)env
+ ri
->fieldoffset
;
180 uint64_t read_raw_cp_reg(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
182 /* Raw read of a coprocessor register (as needed for migration, etc). */
183 if (ri
->type
& ARM_CP_CONST
) {
184 return ri
->resetvalue
;
185 } else if (ri
->raw_readfn
) {
186 return ri
->raw_readfn(env
, ri
);
187 } else if (ri
->readfn
) {
188 return ri
->readfn(env
, ri
);
190 return raw_read(env
, ri
);
194 static void write_raw_cp_reg(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
197 /* Raw write of a coprocessor register (as needed for migration, etc).
198 * Note that constant registers are treated as write-ignored; the
199 * caller should check for success by whether a readback gives the
202 if (ri
->type
& ARM_CP_CONST
) {
204 } else if (ri
->raw_writefn
) {
205 ri
->raw_writefn(env
, ri
, v
);
206 } else if (ri
->writefn
) {
207 ri
->writefn(env
, ri
, v
);
209 raw_write(env
, ri
, v
);
213 static bool raw_accessors_invalid(const ARMCPRegInfo
*ri
)
215 /* Return true if the regdef would cause an assertion if you called
216 * read_raw_cp_reg() or write_raw_cp_reg() on it (ie if it is a
217 * program bug for it not to have the NO_RAW flag).
218 * NB that returning false here doesn't necessarily mean that calling
219 * read/write_raw_cp_reg() is safe, because we can't distinguish "has
220 * read/write access functions which are safe for raw use" from "has
221 * read/write access functions which have side effects but has forgotten
222 * to provide raw access functions".
223 * The tests here line up with the conditions in read/write_raw_cp_reg()
224 * and assertions in raw_read()/raw_write().
226 if ((ri
->type
& ARM_CP_CONST
) ||
228 ((ri
->raw_writefn
|| ri
->writefn
) && (ri
->raw_readfn
|| ri
->readfn
))) {
234 bool write_cpustate_to_list(ARMCPU
*cpu
)
236 /* Write the coprocessor state from cpu->env to the (index,value) list. */
240 for (i
= 0; i
< cpu
->cpreg_array_len
; i
++) {
241 uint32_t regidx
= kvm_to_cpreg_id(cpu
->cpreg_indexes
[i
]);
242 const ARMCPRegInfo
*ri
;
244 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
249 if (ri
->type
& ARM_CP_NO_RAW
) {
252 cpu
->cpreg_values
[i
] = read_raw_cp_reg(&cpu
->env
, ri
);
257 bool write_list_to_cpustate(ARMCPU
*cpu
)
262 for (i
= 0; i
< cpu
->cpreg_array_len
; i
++) {
263 uint32_t regidx
= kvm_to_cpreg_id(cpu
->cpreg_indexes
[i
]);
264 uint64_t v
= cpu
->cpreg_values
[i
];
265 const ARMCPRegInfo
*ri
;
267 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
272 if (ri
->type
& ARM_CP_NO_RAW
) {
275 /* Write value and confirm it reads back as written
276 * (to catch read-only registers and partially read-only
277 * registers where the incoming migration value doesn't match)
279 write_raw_cp_reg(&cpu
->env
, ri
, v
);
280 if (read_raw_cp_reg(&cpu
->env
, ri
) != v
) {
287 static void add_cpreg_to_list(gpointer key
, gpointer opaque
)
289 ARMCPU
*cpu
= opaque
;
291 const ARMCPRegInfo
*ri
;
293 regidx
= *(uint32_t *)key
;
294 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
296 if (!(ri
->type
& (ARM_CP_NO_RAW
|ARM_CP_ALIAS
))) {
297 cpu
->cpreg_indexes
[cpu
->cpreg_array_len
] = cpreg_to_kvm_id(regidx
);
298 /* The value array need not be initialized at this point */
299 cpu
->cpreg_array_len
++;
303 static void count_cpreg(gpointer key
, gpointer opaque
)
305 ARMCPU
*cpu
= opaque
;
307 const ARMCPRegInfo
*ri
;
309 regidx
= *(uint32_t *)key
;
310 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
312 if (!(ri
->type
& (ARM_CP_NO_RAW
|ARM_CP_ALIAS
))) {
313 cpu
->cpreg_array_len
++;
317 static gint
cpreg_key_compare(gconstpointer a
, gconstpointer b
)
319 uint64_t aidx
= cpreg_to_kvm_id(*(uint32_t *)a
);
320 uint64_t bidx
= cpreg_to_kvm_id(*(uint32_t *)b
);
331 void init_cpreg_list(ARMCPU
*cpu
)
333 /* Initialise the cpreg_tuples[] array based on the cp_regs hash.
334 * Note that we require cpreg_tuples[] to be sorted by key ID.
339 keys
= g_hash_table_get_keys(cpu
->cp_regs
);
340 keys
= g_list_sort(keys
, cpreg_key_compare
);
342 cpu
->cpreg_array_len
= 0;
344 g_list_foreach(keys
, count_cpreg
, cpu
);
346 arraylen
= cpu
->cpreg_array_len
;
347 cpu
->cpreg_indexes
= g_new(uint64_t, arraylen
);
348 cpu
->cpreg_values
= g_new(uint64_t, arraylen
);
349 cpu
->cpreg_vmstate_indexes
= g_new(uint64_t, arraylen
);
350 cpu
->cpreg_vmstate_values
= g_new(uint64_t, arraylen
);
351 cpu
->cpreg_vmstate_array_len
= cpu
->cpreg_array_len
;
352 cpu
->cpreg_array_len
= 0;
354 g_list_foreach(keys
, add_cpreg_to_list
, cpu
);
356 assert(cpu
->cpreg_array_len
== arraylen
);
362 * Some registers are not accessible if EL3.NS=0 and EL3 is using AArch32 but
363 * they are accessible when EL3 is using AArch64 regardless of EL3.NS.
365 * access_el3_aa32ns: Used to check AArch32 register views.
366 * access_el3_aa32ns_aa64any: Used to check both AArch32/64 register views.
368 static CPAccessResult
access_el3_aa32ns(CPUARMState
*env
,
369 const ARMCPRegInfo
*ri
,
372 bool secure
= arm_is_secure_below_el3(env
);
374 assert(!arm_el_is_aa64(env
, 3));
376 return CP_ACCESS_TRAP_UNCATEGORIZED
;
381 static CPAccessResult
access_el3_aa32ns_aa64any(CPUARMState
*env
,
382 const ARMCPRegInfo
*ri
,
385 if (!arm_el_is_aa64(env
, 3)) {
386 return access_el3_aa32ns(env
, ri
, isread
);
391 /* Some secure-only AArch32 registers trap to EL3 if used from
392 * Secure EL1 (but are just ordinary UNDEF in other non-EL3 contexts).
393 * Note that an access from Secure EL1 can only happen if EL3 is AArch64.
394 * We assume that the .access field is set to PL1_RW.
396 static CPAccessResult
access_trap_aa32s_el1(CPUARMState
*env
,
397 const ARMCPRegInfo
*ri
,
400 if (arm_current_el(env
) == 3) {
403 if (arm_is_secure_below_el3(env
)) {
404 return CP_ACCESS_TRAP_EL3
;
406 /* This will be EL1 NS and EL2 NS, which just UNDEF */
407 return CP_ACCESS_TRAP_UNCATEGORIZED
;
410 /* Check for traps to "powerdown debug" registers, which are controlled
413 static CPAccessResult
access_tdosa(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
416 int el
= arm_current_el(env
);
418 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TDOSA
)
419 && !arm_is_secure_below_el3(env
)) {
420 return CP_ACCESS_TRAP_EL2
;
422 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TDOSA
)) {
423 return CP_ACCESS_TRAP_EL3
;
428 /* Check for traps to "debug ROM" registers, which are controlled
429 * by MDCR_EL2.TDRA for EL2 but by the more general MDCR_EL3.TDA for EL3.
431 static CPAccessResult
access_tdra(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
434 int el
= arm_current_el(env
);
436 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TDRA
)
437 && !arm_is_secure_below_el3(env
)) {
438 return CP_ACCESS_TRAP_EL2
;
440 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TDA
)) {
441 return CP_ACCESS_TRAP_EL3
;
446 /* Check for traps to general debug registers, which are controlled
447 * by MDCR_EL2.TDA for EL2 and MDCR_EL3.TDA for EL3.
449 static CPAccessResult
access_tda(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
452 int el
= arm_current_el(env
);
454 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TDA
)
455 && !arm_is_secure_below_el3(env
)) {
456 return CP_ACCESS_TRAP_EL2
;
458 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TDA
)) {
459 return CP_ACCESS_TRAP_EL3
;
464 /* Check for traps to performance monitor registers, which are controlled
465 * by MDCR_EL2.TPM for EL2 and MDCR_EL3.TPM for EL3.
467 static CPAccessResult
access_tpm(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
470 int el
= arm_current_el(env
);
472 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TPM
)
473 && !arm_is_secure_below_el3(env
)) {
474 return CP_ACCESS_TRAP_EL2
;
476 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TPM
)) {
477 return CP_ACCESS_TRAP_EL3
;
482 static void dacr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
484 ARMCPU
*cpu
= arm_env_get_cpu(env
);
486 raw_write(env
, ri
, value
);
487 tlb_flush(CPU(cpu
)); /* Flush TLB as domain not tracked in TLB */
490 static void fcse_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
492 ARMCPU
*cpu
= arm_env_get_cpu(env
);
494 if (raw_read(env
, ri
) != value
) {
495 /* Unlike real hardware the qemu TLB uses virtual addresses,
496 * not modified virtual addresses, so this causes a TLB flush.
499 raw_write(env
, ri
, value
);
503 static void contextidr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
506 ARMCPU
*cpu
= arm_env_get_cpu(env
);
508 if (raw_read(env
, ri
) != value
&& !arm_feature(env
, ARM_FEATURE_PMSA
)
509 && !extended_addresses_enabled(env
)) {
510 /* For VMSA (when not using the LPAE long descriptor page table
511 * format) this register includes the ASID, so do a TLB flush.
512 * For PMSA it is purely a process ID and no action is needed.
516 raw_write(env
, ri
, value
);
519 static void tlbiall_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
522 /* Invalidate all (TLBIALL) */
523 ARMCPU
*cpu
= arm_env_get_cpu(env
);
528 static void tlbimva_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
531 /* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */
532 ARMCPU
*cpu
= arm_env_get_cpu(env
);
534 tlb_flush_page(CPU(cpu
), value
& TARGET_PAGE_MASK
);
537 static void tlbiasid_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
540 /* Invalidate by ASID (TLBIASID) */
541 ARMCPU
*cpu
= arm_env_get_cpu(env
);
546 static void tlbimvaa_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
549 /* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */
550 ARMCPU
*cpu
= arm_env_get_cpu(env
);
552 tlb_flush_page(CPU(cpu
), value
& TARGET_PAGE_MASK
);
555 /* IS variants of TLB operations must affect all cores */
556 static void tlbiall_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
559 CPUState
*cs
= ENV_GET_CPU(env
);
561 tlb_flush_all_cpus_synced(cs
);
564 static void tlbiasid_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
567 CPUState
*cs
= ENV_GET_CPU(env
);
569 tlb_flush_all_cpus_synced(cs
);
572 static void tlbimva_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
575 CPUState
*cs
= ENV_GET_CPU(env
);
577 tlb_flush_page_all_cpus_synced(cs
, value
& TARGET_PAGE_MASK
);
580 static void tlbimvaa_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
583 CPUState
*cs
= ENV_GET_CPU(env
);
585 tlb_flush_page_all_cpus_synced(cs
, value
& TARGET_PAGE_MASK
);
588 static void tlbiall_nsnh_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
591 CPUState
*cs
= ENV_GET_CPU(env
);
593 tlb_flush_by_mmuidx(cs
,
594 ARMMMUIdxBit_S12NSE1
|
595 ARMMMUIdxBit_S12NSE0
|
599 static void tlbiall_nsnh_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
602 CPUState
*cs
= ENV_GET_CPU(env
);
604 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
605 ARMMMUIdxBit_S12NSE1
|
606 ARMMMUIdxBit_S12NSE0
|
610 static void tlbiipas2_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
613 /* Invalidate by IPA. This has to invalidate any structures that
614 * contain only stage 2 translation information, but does not need
615 * to apply to structures that contain combined stage 1 and stage 2
616 * translation information.
617 * This must NOP if EL2 isn't implemented or SCR_EL3.NS is zero.
619 CPUState
*cs
= ENV_GET_CPU(env
);
622 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
626 pageaddr
= sextract64(value
<< 12, 0, 40);
628 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S2NS
);
631 static void tlbiipas2_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
634 CPUState
*cs
= ENV_GET_CPU(env
);
637 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
641 pageaddr
= sextract64(value
<< 12, 0, 40);
643 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
647 static void tlbiall_hyp_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
650 CPUState
*cs
= ENV_GET_CPU(env
);
652 tlb_flush_by_mmuidx(cs
, ARMMMUIdxBit_S1E2
);
655 static void tlbiall_hyp_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
658 CPUState
*cs
= ENV_GET_CPU(env
);
660 tlb_flush_by_mmuidx_all_cpus_synced(cs
, ARMMMUIdxBit_S1E2
);
663 static void tlbimva_hyp_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
666 CPUState
*cs
= ENV_GET_CPU(env
);
667 uint64_t pageaddr
= value
& ~MAKE_64BIT_MASK(0, 12);
669 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S1E2
);
672 static void tlbimva_hyp_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
675 CPUState
*cs
= ENV_GET_CPU(env
);
676 uint64_t pageaddr
= value
& ~MAKE_64BIT_MASK(0, 12);
678 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
682 static const ARMCPRegInfo cp_reginfo
[] = {
683 /* Define the secure and non-secure FCSE identifier CP registers
684 * separately because there is no secure bank in V8 (no _EL3). This allows
685 * the secure register to be properly reset and migrated. There is also no
686 * v8 EL1 version of the register so the non-secure instance stands alone.
688 { .name
= "FCSEIDR(NS)",
689 .cp
= 15, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 0,
690 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_NS
,
691 .fieldoffset
= offsetof(CPUARMState
, cp15
.fcseidr_ns
),
692 .resetvalue
= 0, .writefn
= fcse_write
, .raw_writefn
= raw_write
, },
693 { .name
= "FCSEIDR(S)",
694 .cp
= 15, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 0,
695 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_S
,
696 .fieldoffset
= offsetof(CPUARMState
, cp15
.fcseidr_s
),
697 .resetvalue
= 0, .writefn
= fcse_write
, .raw_writefn
= raw_write
, },
698 /* Define the secure and non-secure context identifier CP registers
699 * separately because there is no secure bank in V8 (no _EL3). This allows
700 * the secure register to be properly reset and migrated. In the
701 * non-secure case, the 32-bit register will have reset and migration
702 * disabled during registration as it is handled by the 64-bit instance.
704 { .name
= "CONTEXTIDR_EL1", .state
= ARM_CP_STATE_BOTH
,
705 .opc0
= 3, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 1,
706 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_NS
,
707 .fieldoffset
= offsetof(CPUARMState
, cp15
.contextidr_el
[1]),
708 .resetvalue
= 0, .writefn
= contextidr_write
, .raw_writefn
= raw_write
, },
709 { .name
= "CONTEXTIDR(S)", .state
= ARM_CP_STATE_AA32
,
710 .cp
= 15, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 1,
711 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_S
,
712 .fieldoffset
= offsetof(CPUARMState
, cp15
.contextidr_s
),
713 .resetvalue
= 0, .writefn
= contextidr_write
, .raw_writefn
= raw_write
, },
717 static const ARMCPRegInfo not_v8_cp_reginfo
[] = {
718 /* NB: Some of these registers exist in v8 but with more precise
719 * definitions that don't use CP_ANY wildcards (mostly in v8_cp_reginfo[]).
721 /* MMU Domain access control / MPU write buffer control */
723 .cp
= 15, .opc1
= CP_ANY
, .crn
= 3, .crm
= CP_ANY
, .opc2
= CP_ANY
,
724 .access
= PL1_RW
, .resetvalue
= 0,
725 .writefn
= dacr_write
, .raw_writefn
= raw_write
,
726 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.dacr_s
),
727 offsetoflow32(CPUARMState
, cp15
.dacr_ns
) } },
728 /* ARMv7 allocates a range of implementation defined TLB LOCKDOWN regs.
729 * For v6 and v5, these mappings are overly broad.
731 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 0,
732 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
733 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 1,
734 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
735 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 4,
736 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
737 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 8,
738 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
739 /* Cache maintenance ops; some of this space may be overridden later. */
740 { .name
= "CACHEMAINT", .cp
= 15, .crn
= 7, .crm
= CP_ANY
,
741 .opc1
= 0, .opc2
= CP_ANY
, .access
= PL1_W
,
742 .type
= ARM_CP_NOP
| ARM_CP_OVERRIDE
},
746 static const ARMCPRegInfo not_v6_cp_reginfo
[] = {
747 /* Not all pre-v6 cores implemented this WFI, so this is slightly
750 { .name
= "WFI_v5", .cp
= 15, .crn
= 7, .crm
= 8, .opc1
= 0, .opc2
= 2,
751 .access
= PL1_W
, .type
= ARM_CP_WFI
},
755 static const ARMCPRegInfo not_v7_cp_reginfo
[] = {
756 /* Standard v6 WFI (also used in some pre-v6 cores); not in v7 (which
757 * is UNPREDICTABLE; we choose to NOP as most implementations do).
759 { .name
= "WFI_v6", .cp
= 15, .crn
= 7, .crm
= 0, .opc1
= 0, .opc2
= 4,
760 .access
= PL1_W
, .type
= ARM_CP_WFI
},
761 /* L1 cache lockdown. Not architectural in v6 and earlier but in practice
762 * implemented in 926, 946, 1026, 1136, 1176 and 11MPCore. StrongARM and
763 * OMAPCP will override this space.
765 { .name
= "DLOCKDOWN", .cp
= 15, .crn
= 9, .crm
= 0, .opc1
= 0, .opc2
= 0,
766 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_data
),
768 { .name
= "ILOCKDOWN", .cp
= 15, .crn
= 9, .crm
= 0, .opc1
= 0, .opc2
= 1,
769 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_insn
),
771 /* v6 doesn't have the cache ID registers but Linux reads them anyway */
772 { .name
= "DUMMY", .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 1, .opc2
= CP_ANY
,
773 .access
= PL1_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
775 /* We don't implement pre-v7 debug but most CPUs had at least a DBGDIDR;
776 * implementing it as RAZ means the "debug architecture version" bits
777 * will read as a reserved value, which should cause Linux to not try
778 * to use the debug hardware.
780 { .name
= "DBGDIDR", .cp
= 14, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 0,
781 .access
= PL0_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
782 /* MMU TLB control. Note that the wildcarding means we cover not just
783 * the unified TLB ops but also the dside/iside/inner-shareable variants.
785 { .name
= "TLBIALL", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
786 .opc1
= CP_ANY
, .opc2
= 0, .access
= PL1_W
, .writefn
= tlbiall_write
,
787 .type
= ARM_CP_NO_RAW
},
788 { .name
= "TLBIMVA", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
789 .opc1
= CP_ANY
, .opc2
= 1, .access
= PL1_W
, .writefn
= tlbimva_write
,
790 .type
= ARM_CP_NO_RAW
},
791 { .name
= "TLBIASID", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
792 .opc1
= CP_ANY
, .opc2
= 2, .access
= PL1_W
, .writefn
= tlbiasid_write
,
793 .type
= ARM_CP_NO_RAW
},
794 { .name
= "TLBIMVAA", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
795 .opc1
= CP_ANY
, .opc2
= 3, .access
= PL1_W
, .writefn
= tlbimvaa_write
,
796 .type
= ARM_CP_NO_RAW
},
797 { .name
= "PRRR", .cp
= 15, .crn
= 10, .crm
= 2,
798 .opc1
= 0, .opc2
= 0, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
799 { .name
= "NMRR", .cp
= 15, .crn
= 10, .crm
= 2,
800 .opc1
= 0, .opc2
= 1, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
804 static void cpacr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
809 /* In ARMv8 most bits of CPACR_EL1 are RES0. */
810 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
811 /* ARMv7 defines bits for unimplemented coprocessors as RAZ/WI.
812 * ASEDIS [31] and D32DIS [30] are both UNK/SBZP without VFP.
813 * TRCDIS [28] is RAZ/WI since we do not implement a trace macrocell.
815 if (arm_feature(env
, ARM_FEATURE_VFP
)) {
816 /* VFP coprocessor: cp10 & cp11 [23:20] */
817 mask
|= (1 << 31) | (1 << 30) | (0xf << 20);
819 if (!arm_feature(env
, ARM_FEATURE_NEON
)) {
820 /* ASEDIS [31] bit is RAO/WI */
824 /* VFPv3 and upwards with NEON implement 32 double precision
825 * registers (D0-D31).
827 if (!arm_feature(env
, ARM_FEATURE_NEON
) ||
828 !arm_feature(env
, ARM_FEATURE_VFP3
)) {
829 /* D32DIS [30] is RAO/WI if D16-31 are not implemented. */
835 env
->cp15
.cpacr_el1
= value
;
838 static CPAccessResult
cpacr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
841 if (arm_feature(env
, ARM_FEATURE_V8
)) {
842 /* Check if CPACR accesses are to be trapped to EL2 */
843 if (arm_current_el(env
) == 1 &&
844 (env
->cp15
.cptr_el
[2] & CPTR_TCPAC
) && !arm_is_secure(env
)) {
845 return CP_ACCESS_TRAP_EL2
;
846 /* Check if CPACR accesses are to be trapped to EL3 */
847 } else if (arm_current_el(env
) < 3 &&
848 (env
->cp15
.cptr_el
[3] & CPTR_TCPAC
)) {
849 return CP_ACCESS_TRAP_EL3
;
856 static CPAccessResult
cptr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
859 /* Check if CPTR accesses are set to trap to EL3 */
860 if (arm_current_el(env
) == 2 && (env
->cp15
.cptr_el
[3] & CPTR_TCPAC
)) {
861 return CP_ACCESS_TRAP_EL3
;
867 static const ARMCPRegInfo v6_cp_reginfo
[] = {
868 /* prefetch by MVA in v6, NOP in v7 */
869 { .name
= "MVA_prefetch",
870 .cp
= 15, .crn
= 7, .crm
= 13, .opc1
= 0, .opc2
= 1,
871 .access
= PL1_W
, .type
= ARM_CP_NOP
},
872 /* We need to break the TB after ISB to execute self-modifying code
873 * correctly and also to take any pending interrupts immediately.
874 * So use arm_cp_write_ignore() function instead of ARM_CP_NOP flag.
876 { .name
= "ISB", .cp
= 15, .crn
= 7, .crm
= 5, .opc1
= 0, .opc2
= 4,
877 .access
= PL0_W
, .type
= ARM_CP_NO_RAW
, .writefn
= arm_cp_write_ignore
},
878 { .name
= "DSB", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 4,
879 .access
= PL0_W
, .type
= ARM_CP_NOP
},
880 { .name
= "DMB", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 5,
881 .access
= PL0_W
, .type
= ARM_CP_NOP
},
882 { .name
= "IFAR", .cp
= 15, .crn
= 6, .crm
= 0, .opc1
= 0, .opc2
= 2,
884 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ifar_s
),
885 offsetof(CPUARMState
, cp15
.ifar_ns
) },
887 /* Watchpoint Fault Address Register : should actually only be present
888 * for 1136, 1176, 11MPCore.
890 { .name
= "WFAR", .cp
= 15, .crn
= 6, .crm
= 0, .opc1
= 0, .opc2
= 1,
891 .access
= PL1_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0, },
892 { .name
= "CPACR", .state
= ARM_CP_STATE_BOTH
, .opc0
= 3,
893 .crn
= 1, .crm
= 0, .opc1
= 0, .opc2
= 2, .accessfn
= cpacr_access
,
894 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.cpacr_el1
),
895 .resetvalue
= 0, .writefn
= cpacr_write
},
899 static CPAccessResult
pmreg_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
902 /* Performance monitor registers user accessibility is controlled
903 * by PMUSERENR. MDCR_EL2.TPM and MDCR_EL3.TPM allow configurable
904 * trapping to EL2 or EL3 for other accesses.
906 int el
= arm_current_el(env
);
908 if (el
== 0 && !(env
->cp15
.c9_pmuserenr
& 1)) {
909 return CP_ACCESS_TRAP
;
911 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TPM
)
912 && !arm_is_secure_below_el3(env
)) {
913 return CP_ACCESS_TRAP_EL2
;
915 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TPM
)) {
916 return CP_ACCESS_TRAP_EL3
;
922 static CPAccessResult
pmreg_access_xevcntr(CPUARMState
*env
,
923 const ARMCPRegInfo
*ri
,
926 /* ER: event counter read trap control */
927 if (arm_feature(env
, ARM_FEATURE_V8
)
928 && arm_current_el(env
) == 0
929 && (env
->cp15
.c9_pmuserenr
& (1 << 3)) != 0
934 return pmreg_access(env
, ri
, isread
);
937 static CPAccessResult
pmreg_access_swinc(CPUARMState
*env
,
938 const ARMCPRegInfo
*ri
,
941 /* SW: software increment write trap control */
942 if (arm_feature(env
, ARM_FEATURE_V8
)
943 && arm_current_el(env
) == 0
944 && (env
->cp15
.c9_pmuserenr
& (1 << 1)) != 0
949 return pmreg_access(env
, ri
, isread
);
952 #ifndef CONFIG_USER_ONLY
954 static CPAccessResult
pmreg_access_selr(CPUARMState
*env
,
955 const ARMCPRegInfo
*ri
,
958 /* ER: event counter read trap control */
959 if (arm_feature(env
, ARM_FEATURE_V8
)
960 && arm_current_el(env
) == 0
961 && (env
->cp15
.c9_pmuserenr
& (1 << 3)) != 0) {
965 return pmreg_access(env
, ri
, isread
);
968 static CPAccessResult
pmreg_access_ccntr(CPUARMState
*env
,
969 const ARMCPRegInfo
*ri
,
972 /* CR: cycle counter read trap control */
973 if (arm_feature(env
, ARM_FEATURE_V8
)
974 && arm_current_el(env
) == 0
975 && (env
->cp15
.c9_pmuserenr
& (1 << 2)) != 0
980 return pmreg_access(env
, ri
, isread
);
983 static inline bool arm_ccnt_enabled(CPUARMState
*env
)
985 /* This does not support checking PMCCFILTR_EL0 register */
987 if (!(env
->cp15
.c9_pmcr
& PMCRE
)) {
994 void pmccntr_sync(CPUARMState
*env
)
998 temp_ticks
= muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
),
999 ARM_CPU_FREQ
, NANOSECONDS_PER_SECOND
);
1001 if (env
->cp15
.c9_pmcr
& PMCRD
) {
1002 /* Increment once every 64 processor clock cycles */
1006 if (arm_ccnt_enabled(env
)) {
1007 env
->cp15
.c15_ccnt
= temp_ticks
- env
->cp15
.c15_ccnt
;
1011 static void pmcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1016 if (value
& PMCRC
) {
1017 /* The counter has been reset */
1018 env
->cp15
.c15_ccnt
= 0;
1021 /* only the DP, X, D and E bits are writable */
1022 env
->cp15
.c9_pmcr
&= ~0x39;
1023 env
->cp15
.c9_pmcr
|= (value
& 0x39);
1028 static uint64_t pmccntr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1030 uint64_t total_ticks
;
1032 if (!arm_ccnt_enabled(env
)) {
1033 /* Counter is disabled, do not change value */
1034 return env
->cp15
.c15_ccnt
;
1037 total_ticks
= muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
),
1038 ARM_CPU_FREQ
, NANOSECONDS_PER_SECOND
);
1040 if (env
->cp15
.c9_pmcr
& PMCRD
) {
1041 /* Increment once every 64 processor clock cycles */
1044 return total_ticks
- env
->cp15
.c15_ccnt
;
1047 static void pmselr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1050 /* The value of PMSELR.SEL affects the behavior of PMXEVTYPER and
1051 * PMXEVCNTR. We allow [0..31] to be written to PMSELR here; in the
1052 * meanwhile, we check PMSELR.SEL when PMXEVTYPER and PMXEVCNTR are
1055 env
->cp15
.c9_pmselr
= value
& 0x1f;
1058 static void pmccntr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1061 uint64_t total_ticks
;
1063 if (!arm_ccnt_enabled(env
)) {
1064 /* Counter is disabled, set the absolute value */
1065 env
->cp15
.c15_ccnt
= value
;
1069 total_ticks
= muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
),
1070 ARM_CPU_FREQ
, NANOSECONDS_PER_SECOND
);
1072 if (env
->cp15
.c9_pmcr
& PMCRD
) {
1073 /* Increment once every 64 processor clock cycles */
1076 env
->cp15
.c15_ccnt
= total_ticks
- value
;
1079 static void pmccntr_write32(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1082 uint64_t cur_val
= pmccntr_read(env
, NULL
);
1084 pmccntr_write(env
, ri
, deposit64(cur_val
, 0, 32, value
));
1087 #else /* CONFIG_USER_ONLY */
1089 void pmccntr_sync(CPUARMState
*env
)
1095 static void pmccfiltr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1099 env
->cp15
.pmccfiltr_el0
= value
& 0x7E000000;
1103 static void pmcntenset_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1107 env
->cp15
.c9_pmcnten
|= value
;
1110 static void pmcntenclr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1114 env
->cp15
.c9_pmcnten
&= ~value
;
1117 static void pmovsr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1120 env
->cp15
.c9_pmovsr
&= ~value
;
1123 static void pmxevtyper_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1126 /* Attempts to access PMXEVTYPER are CONSTRAINED UNPREDICTABLE when
1127 * PMSELR value is equal to or greater than the number of implemented
1128 * counters, but not equal to 0x1f. We opt to behave as a RAZ/WI.
1130 if (env
->cp15
.c9_pmselr
== 0x1f) {
1131 pmccfiltr_write(env
, ri
, value
);
1135 static uint64_t pmxevtyper_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1137 /* We opt to behave as a RAZ/WI when attempts to access PMXEVTYPER
1138 * are CONSTRAINED UNPREDICTABLE. See comments in pmxevtyper_write().
1140 if (env
->cp15
.c9_pmselr
== 0x1f) {
1141 return env
->cp15
.pmccfiltr_el0
;
1147 static void pmuserenr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1150 if (arm_feature(env
, ARM_FEATURE_V8
)) {
1151 env
->cp15
.c9_pmuserenr
= value
& 0xf;
1153 env
->cp15
.c9_pmuserenr
= value
& 1;
1157 static void pmintenset_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1160 /* We have no event counters so only the C bit can be changed */
1162 env
->cp15
.c9_pminten
|= value
;
1165 static void pmintenclr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1169 env
->cp15
.c9_pminten
&= ~value
;
1172 static void vbar_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1175 /* Note that even though the AArch64 view of this register has bits
1176 * [10:0] all RES0 we can only mask the bottom 5, to comply with the
1177 * architectural requirements for bits which are RES0 only in some
1178 * contexts. (ARMv8 would permit us to do no masking at all, but ARMv7
1179 * requires the bottom five bits to be RAZ/WI because they're UNK/SBZP.)
1181 raw_write(env
, ri
, value
& ~0x1FULL
);
1184 static void scr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
1186 /* We only mask off bits that are RES0 both for AArch64 and AArch32.
1187 * For bits that vary between AArch32/64, code needs to check the
1188 * current execution mode before directly using the feature bit.
1190 uint32_t valid_mask
= SCR_AARCH64_MASK
| SCR_AARCH32_MASK
;
1192 if (!arm_feature(env
, ARM_FEATURE_EL2
)) {
1193 valid_mask
&= ~SCR_HCE
;
1195 /* On ARMv7, SMD (or SCD as it is called in v7) is only
1196 * supported if EL2 exists. The bit is UNK/SBZP when
1197 * EL2 is unavailable. In QEMU ARMv7, we force it to always zero
1198 * when EL2 is unavailable.
1199 * On ARMv8, this bit is always available.
1201 if (arm_feature(env
, ARM_FEATURE_V7
) &&
1202 !arm_feature(env
, ARM_FEATURE_V8
)) {
1203 valid_mask
&= ~SCR_SMD
;
1207 /* Clear all-context RES0 bits. */
1208 value
&= valid_mask
;
1209 raw_write(env
, ri
, value
);
1212 static uint64_t ccsidr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1214 ARMCPU
*cpu
= arm_env_get_cpu(env
);
1216 /* Acquire the CSSELR index from the bank corresponding to the CCSIDR
1219 uint32_t index
= A32_BANKED_REG_GET(env
, csselr
,
1220 ri
->secure
& ARM_CP_SECSTATE_S
);
1222 return cpu
->ccsidr
[index
];
1225 static void csselr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1228 raw_write(env
, ri
, value
& 0xf);
1231 static uint64_t isr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1233 CPUState
*cs
= ENV_GET_CPU(env
);
1236 if (cs
->interrupt_request
& CPU_INTERRUPT_HARD
) {
1239 if (cs
->interrupt_request
& CPU_INTERRUPT_FIQ
) {
1242 /* External aborts are not possible in QEMU so A bit is always clear */
1246 static const ARMCPRegInfo v7_cp_reginfo
[] = {
1247 /* the old v6 WFI, UNPREDICTABLE in v7 but we choose to NOP */
1248 { .name
= "NOP", .cp
= 15, .crn
= 7, .crm
= 0, .opc1
= 0, .opc2
= 4,
1249 .access
= PL1_W
, .type
= ARM_CP_NOP
},
1250 /* Performance monitors are implementation defined in v7,
1251 * but with an ARM recommended set of registers, which we
1252 * follow (although we don't actually implement any counters)
1254 * Performance registers fall into three categories:
1255 * (a) always UNDEF in PL0, RW in PL1 (PMINTENSET, PMINTENCLR)
1256 * (b) RO in PL0 (ie UNDEF on write), RW in PL1 (PMUSERENR)
1257 * (c) UNDEF in PL0 if PMUSERENR.EN==0, otherwise accessible (all others)
1258 * For the cases controlled by PMUSERENR we must set .access to PL0_RW
1259 * or PL0_RO as appropriate and then check PMUSERENR in the helper fn.
1261 { .name
= "PMCNTENSET", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 1,
1262 .access
= PL0_RW
, .type
= ARM_CP_ALIAS
,
1263 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmcnten
),
1264 .writefn
= pmcntenset_write
,
1265 .accessfn
= pmreg_access
,
1266 .raw_writefn
= raw_write
},
1267 { .name
= "PMCNTENSET_EL0", .state
= ARM_CP_STATE_AA64
,
1268 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 1,
1269 .access
= PL0_RW
, .accessfn
= pmreg_access
,
1270 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmcnten
), .resetvalue
= 0,
1271 .writefn
= pmcntenset_write
, .raw_writefn
= raw_write
},
1272 { .name
= "PMCNTENCLR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 2,
1274 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmcnten
),
1275 .accessfn
= pmreg_access
,
1276 .writefn
= pmcntenclr_write
,
1277 .type
= ARM_CP_ALIAS
},
1278 { .name
= "PMCNTENCLR_EL0", .state
= ARM_CP_STATE_AA64
,
1279 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 2,
1280 .access
= PL0_RW
, .accessfn
= pmreg_access
,
1281 .type
= ARM_CP_ALIAS
,
1282 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmcnten
),
1283 .writefn
= pmcntenclr_write
},
1284 { .name
= "PMOVSR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 3,
1285 .access
= PL0_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmovsr
),
1286 .accessfn
= pmreg_access
,
1287 .writefn
= pmovsr_write
,
1288 .raw_writefn
= raw_write
},
1289 { .name
= "PMOVSCLR_EL0", .state
= ARM_CP_STATE_AA64
,
1290 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 3,
1291 .access
= PL0_RW
, .accessfn
= pmreg_access
,
1292 .type
= ARM_CP_ALIAS
,
1293 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmovsr
),
1294 .writefn
= pmovsr_write
,
1295 .raw_writefn
= raw_write
},
1296 /* Unimplemented so WI. */
1297 { .name
= "PMSWINC", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 4,
1298 .access
= PL0_W
, .accessfn
= pmreg_access_swinc
, .type
= ARM_CP_NOP
},
1299 #ifndef CONFIG_USER_ONLY
1300 { .name
= "PMSELR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 5,
1301 .access
= PL0_RW
, .type
= ARM_CP_ALIAS
,
1302 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmselr
),
1303 .accessfn
= pmreg_access_selr
, .writefn
= pmselr_write
,
1304 .raw_writefn
= raw_write
},
1305 { .name
= "PMSELR_EL0", .state
= ARM_CP_STATE_AA64
,
1306 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 5,
1307 .access
= PL0_RW
, .accessfn
= pmreg_access_selr
,
1308 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmselr
),
1309 .writefn
= pmselr_write
, .raw_writefn
= raw_write
, },
1310 { .name
= "PMCCNTR", .cp
= 15, .crn
= 9, .crm
= 13, .opc1
= 0, .opc2
= 0,
1311 .access
= PL0_RW
, .resetvalue
= 0, .type
= ARM_CP_IO
,
1312 .readfn
= pmccntr_read
, .writefn
= pmccntr_write32
,
1313 .accessfn
= pmreg_access_ccntr
},
1314 { .name
= "PMCCNTR_EL0", .state
= ARM_CP_STATE_AA64
,
1315 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 13, .opc2
= 0,
1316 .access
= PL0_RW
, .accessfn
= pmreg_access_ccntr
,
1318 .readfn
= pmccntr_read
, .writefn
= pmccntr_write
, },
1320 { .name
= "PMCCFILTR_EL0", .state
= ARM_CP_STATE_AA64
,
1321 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 15, .opc2
= 7,
1322 .writefn
= pmccfiltr_write
,
1323 .access
= PL0_RW
, .accessfn
= pmreg_access
,
1325 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmccfiltr_el0
),
1327 { .name
= "PMXEVTYPER", .cp
= 15, .crn
= 9, .crm
= 13, .opc1
= 0, .opc2
= 1,
1328 .access
= PL0_RW
, .type
= ARM_CP_NO_RAW
, .accessfn
= pmreg_access
,
1329 .writefn
= pmxevtyper_write
, .readfn
= pmxevtyper_read
},
1330 { .name
= "PMXEVTYPER_EL0", .state
= ARM_CP_STATE_AA64
,
1331 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 13, .opc2
= 1,
1332 .access
= PL0_RW
, .type
= ARM_CP_NO_RAW
, .accessfn
= pmreg_access
,
1333 .writefn
= pmxevtyper_write
, .readfn
= pmxevtyper_read
},
1334 /* Unimplemented, RAZ/WI. */
1335 { .name
= "PMXEVCNTR", .cp
= 15, .crn
= 9, .crm
= 13, .opc1
= 0, .opc2
= 2,
1336 .access
= PL0_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0,
1337 .accessfn
= pmreg_access_xevcntr
},
1338 { .name
= "PMUSERENR", .cp
= 15, .crn
= 9, .crm
= 14, .opc1
= 0, .opc2
= 0,
1339 .access
= PL0_R
| PL1_RW
, .accessfn
= access_tpm
,
1340 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmuserenr
),
1342 .writefn
= pmuserenr_write
, .raw_writefn
= raw_write
},
1343 { .name
= "PMUSERENR_EL0", .state
= ARM_CP_STATE_AA64
,
1344 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 14, .opc2
= 0,
1345 .access
= PL0_R
| PL1_RW
, .accessfn
= access_tpm
, .type
= ARM_CP_ALIAS
,
1346 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmuserenr
),
1348 .writefn
= pmuserenr_write
, .raw_writefn
= raw_write
},
1349 { .name
= "PMINTENSET", .cp
= 15, .crn
= 9, .crm
= 14, .opc1
= 0, .opc2
= 1,
1350 .access
= PL1_RW
, .accessfn
= access_tpm
,
1351 .type
= ARM_CP_ALIAS
,
1352 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pminten
),
1354 .writefn
= pmintenset_write
, .raw_writefn
= raw_write
},
1355 { .name
= "PMINTENSET_EL1", .state
= ARM_CP_STATE_AA64
,
1356 .opc0
= 3, .opc1
= 0, .crn
= 9, .crm
= 14, .opc2
= 1,
1357 .access
= PL1_RW
, .accessfn
= access_tpm
,
1359 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pminten
),
1360 .writefn
= pmintenset_write
, .raw_writefn
= raw_write
,
1361 .resetvalue
= 0x0 },
1362 { .name
= "PMINTENCLR", .cp
= 15, .crn
= 9, .crm
= 14, .opc1
= 0, .opc2
= 2,
1363 .access
= PL1_RW
, .accessfn
= access_tpm
, .type
= ARM_CP_ALIAS
,
1364 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pminten
),
1365 .writefn
= pmintenclr_write
, },
1366 { .name
= "PMINTENCLR_EL1", .state
= ARM_CP_STATE_AA64
,
1367 .opc0
= 3, .opc1
= 0, .crn
= 9, .crm
= 14, .opc2
= 2,
1368 .access
= PL1_RW
, .accessfn
= access_tpm
, .type
= ARM_CP_ALIAS
,
1369 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pminten
),
1370 .writefn
= pmintenclr_write
},
1371 { .name
= "CCSIDR", .state
= ARM_CP_STATE_BOTH
,
1372 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 1, .opc2
= 0,
1373 .access
= PL1_R
, .readfn
= ccsidr_read
, .type
= ARM_CP_NO_RAW
},
1374 { .name
= "CSSELR", .state
= ARM_CP_STATE_BOTH
,
1375 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 2, .opc2
= 0,
1376 .access
= PL1_RW
, .writefn
= csselr_write
, .resetvalue
= 0,
1377 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.csselr_s
),
1378 offsetof(CPUARMState
, cp15
.csselr_ns
) } },
1379 /* Auxiliary ID register: this actually has an IMPDEF value but for now
1380 * just RAZ for all cores:
1382 { .name
= "AIDR", .state
= ARM_CP_STATE_BOTH
,
1383 .opc0
= 3, .opc1
= 1, .crn
= 0, .crm
= 0, .opc2
= 7,
1384 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
1385 /* Auxiliary fault status registers: these also are IMPDEF, and we
1386 * choose to RAZ/WI for all cores.
1388 { .name
= "AFSR0_EL1", .state
= ARM_CP_STATE_BOTH
,
1389 .opc0
= 3, .opc1
= 0, .crn
= 5, .crm
= 1, .opc2
= 0,
1390 .access
= PL1_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
1391 { .name
= "AFSR1_EL1", .state
= ARM_CP_STATE_BOTH
,
1392 .opc0
= 3, .opc1
= 0, .crn
= 5, .crm
= 1, .opc2
= 1,
1393 .access
= PL1_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
1394 /* MAIR can just read-as-written because we don't implement caches
1395 * and so don't need to care about memory attributes.
1397 { .name
= "MAIR_EL1", .state
= ARM_CP_STATE_AA64
,
1398 .opc0
= 3, .opc1
= 0, .crn
= 10, .crm
= 2, .opc2
= 0,
1399 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mair_el
[1]),
1401 { .name
= "MAIR_EL3", .state
= ARM_CP_STATE_AA64
,
1402 .opc0
= 3, .opc1
= 6, .crn
= 10, .crm
= 2, .opc2
= 0,
1403 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mair_el
[3]),
1405 /* For non-long-descriptor page tables these are PRRR and NMRR;
1406 * regardless they still act as reads-as-written for QEMU.
1408 /* MAIR0/1 are defined separately from their 64-bit counterpart which
1409 * allows them to assign the correct fieldoffset based on the endianness
1410 * handled in the field definitions.
1412 { .name
= "MAIR0", .state
= ARM_CP_STATE_AA32
,
1413 .cp
= 15, .opc1
= 0, .crn
= 10, .crm
= 2, .opc2
= 0, .access
= PL1_RW
,
1414 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.mair0_s
),
1415 offsetof(CPUARMState
, cp15
.mair0_ns
) },
1416 .resetfn
= arm_cp_reset_ignore
},
1417 { .name
= "MAIR1", .state
= ARM_CP_STATE_AA32
,
1418 .cp
= 15, .opc1
= 0, .crn
= 10, .crm
= 2, .opc2
= 1, .access
= PL1_RW
,
1419 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.mair1_s
),
1420 offsetof(CPUARMState
, cp15
.mair1_ns
) },
1421 .resetfn
= arm_cp_reset_ignore
},
1422 { .name
= "ISR_EL1", .state
= ARM_CP_STATE_BOTH
,
1423 .opc0
= 3, .opc1
= 0, .crn
= 12, .crm
= 1, .opc2
= 0,
1424 .type
= ARM_CP_NO_RAW
, .access
= PL1_R
, .readfn
= isr_read
},
1425 /* 32 bit ITLB invalidates */
1426 { .name
= "ITLBIALL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 5, .opc2
= 0,
1427 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_write
},
1428 { .name
= "ITLBIMVA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 5, .opc2
= 1,
1429 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
1430 { .name
= "ITLBIASID", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 5, .opc2
= 2,
1431 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiasid_write
},
1432 /* 32 bit DTLB invalidates */
1433 { .name
= "DTLBIALL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 6, .opc2
= 0,
1434 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_write
},
1435 { .name
= "DTLBIMVA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 6, .opc2
= 1,
1436 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
1437 { .name
= "DTLBIASID", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 6, .opc2
= 2,
1438 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiasid_write
},
1439 /* 32 bit TLB invalidates */
1440 { .name
= "TLBIALL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 0,
1441 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_write
},
1442 { .name
= "TLBIMVA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 1,
1443 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
1444 { .name
= "TLBIASID", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 2,
1445 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiasid_write
},
1446 { .name
= "TLBIMVAA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 3,
1447 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimvaa_write
},
1451 static const ARMCPRegInfo v7mp_cp_reginfo
[] = {
1452 /* 32 bit TLB invalidates, Inner Shareable */
1453 { .name
= "TLBIALLIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 0,
1454 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_is_write
},
1455 { .name
= "TLBIMVAIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 1,
1456 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_is_write
},
1457 { .name
= "TLBIASIDIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 2,
1458 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
,
1459 .writefn
= tlbiasid_is_write
},
1460 { .name
= "TLBIMVAAIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 3,
1461 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
,
1462 .writefn
= tlbimvaa_is_write
},
1466 static void teecr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1473 static CPAccessResult
teehbr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1476 if (arm_current_el(env
) == 0 && (env
->teecr
& 1)) {
1477 return CP_ACCESS_TRAP
;
1479 return CP_ACCESS_OK
;
1482 static const ARMCPRegInfo t2ee_cp_reginfo
[] = {
1483 { .name
= "TEECR", .cp
= 14, .crn
= 0, .crm
= 0, .opc1
= 6, .opc2
= 0,
1484 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, teecr
),
1486 .writefn
= teecr_write
},
1487 { .name
= "TEEHBR", .cp
= 14, .crn
= 1, .crm
= 0, .opc1
= 6, .opc2
= 0,
1488 .access
= PL0_RW
, .fieldoffset
= offsetof(CPUARMState
, teehbr
),
1489 .accessfn
= teehbr_access
, .resetvalue
= 0 },
1493 static const ARMCPRegInfo v6k_cp_reginfo
[] = {
1494 { .name
= "TPIDR_EL0", .state
= ARM_CP_STATE_AA64
,
1495 .opc0
= 3, .opc1
= 3, .opc2
= 2, .crn
= 13, .crm
= 0,
1497 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[0]), .resetvalue
= 0 },
1498 { .name
= "TPIDRURW", .cp
= 15, .crn
= 13, .crm
= 0, .opc1
= 0, .opc2
= 2,
1500 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tpidrurw_s
),
1501 offsetoflow32(CPUARMState
, cp15
.tpidrurw_ns
) },
1502 .resetfn
= arm_cp_reset_ignore
},
1503 { .name
= "TPIDRRO_EL0", .state
= ARM_CP_STATE_AA64
,
1504 .opc0
= 3, .opc1
= 3, .opc2
= 3, .crn
= 13, .crm
= 0,
1505 .access
= PL0_R
|PL1_W
,
1506 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidrro_el
[0]),
1508 { .name
= "TPIDRURO", .cp
= 15, .crn
= 13, .crm
= 0, .opc1
= 0, .opc2
= 3,
1509 .access
= PL0_R
|PL1_W
,
1510 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tpidruro_s
),
1511 offsetoflow32(CPUARMState
, cp15
.tpidruro_ns
) },
1512 .resetfn
= arm_cp_reset_ignore
},
1513 { .name
= "TPIDR_EL1", .state
= ARM_CP_STATE_AA64
,
1514 .opc0
= 3, .opc1
= 0, .opc2
= 4, .crn
= 13, .crm
= 0,
1516 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[1]), .resetvalue
= 0 },
1517 { .name
= "TPIDRPRW", .opc1
= 0, .cp
= 15, .crn
= 13, .crm
= 0, .opc2
= 4,
1519 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tpidrprw_s
),
1520 offsetoflow32(CPUARMState
, cp15
.tpidrprw_ns
) },
1525 #ifndef CONFIG_USER_ONLY
1527 static CPAccessResult
gt_cntfrq_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1530 /* CNTFRQ: not visible from PL0 if both PL0PCTEN and PL0VCTEN are zero.
1531 * Writable only at the highest implemented exception level.
1533 int el
= arm_current_el(env
);
1537 if (!extract32(env
->cp15
.c14_cntkctl
, 0, 2)) {
1538 return CP_ACCESS_TRAP
;
1542 if (!isread
&& ri
->state
== ARM_CP_STATE_AA32
&&
1543 arm_is_secure_below_el3(env
)) {
1544 /* Accesses from 32-bit Secure EL1 UNDEF (*not* trap to EL3!) */
1545 return CP_ACCESS_TRAP_UNCATEGORIZED
;
1553 if (!isread
&& el
< arm_highest_el(env
)) {
1554 return CP_ACCESS_TRAP_UNCATEGORIZED
;
1557 return CP_ACCESS_OK
;
1560 static CPAccessResult
gt_counter_access(CPUARMState
*env
, int timeridx
,
1563 unsigned int cur_el
= arm_current_el(env
);
1564 bool secure
= arm_is_secure(env
);
1566 /* CNT[PV]CT: not visible from PL0 if ELO[PV]CTEN is zero */
1568 !extract32(env
->cp15
.c14_cntkctl
, timeridx
, 1)) {
1569 return CP_ACCESS_TRAP
;
1572 if (arm_feature(env
, ARM_FEATURE_EL2
) &&
1573 timeridx
== GTIMER_PHYS
&& !secure
&& cur_el
< 2 &&
1574 !extract32(env
->cp15
.cnthctl_el2
, 0, 1)) {
1575 return CP_ACCESS_TRAP_EL2
;
1577 return CP_ACCESS_OK
;
1580 static CPAccessResult
gt_timer_access(CPUARMState
*env
, int timeridx
,
1583 unsigned int cur_el
= arm_current_el(env
);
1584 bool secure
= arm_is_secure(env
);
1586 /* CNT[PV]_CVAL, CNT[PV]_CTL, CNT[PV]_TVAL: not visible from PL0 if
1587 * EL0[PV]TEN is zero.
1590 !extract32(env
->cp15
.c14_cntkctl
, 9 - timeridx
, 1)) {
1591 return CP_ACCESS_TRAP
;
1594 if (arm_feature(env
, ARM_FEATURE_EL2
) &&
1595 timeridx
== GTIMER_PHYS
&& !secure
&& cur_el
< 2 &&
1596 !extract32(env
->cp15
.cnthctl_el2
, 1, 1)) {
1597 return CP_ACCESS_TRAP_EL2
;
1599 return CP_ACCESS_OK
;
1602 static CPAccessResult
gt_pct_access(CPUARMState
*env
,
1603 const ARMCPRegInfo
*ri
,
1606 return gt_counter_access(env
, GTIMER_PHYS
, isread
);
1609 static CPAccessResult
gt_vct_access(CPUARMState
*env
,
1610 const ARMCPRegInfo
*ri
,
1613 return gt_counter_access(env
, GTIMER_VIRT
, isread
);
1616 static CPAccessResult
gt_ptimer_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1619 return gt_timer_access(env
, GTIMER_PHYS
, isread
);
1622 static CPAccessResult
gt_vtimer_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1625 return gt_timer_access(env
, GTIMER_VIRT
, isread
);
1628 static CPAccessResult
gt_stimer_access(CPUARMState
*env
,
1629 const ARMCPRegInfo
*ri
,
1632 /* The AArch64 register view of the secure physical timer is
1633 * always accessible from EL3, and configurably accessible from
1636 switch (arm_current_el(env
)) {
1638 if (!arm_is_secure(env
)) {
1639 return CP_ACCESS_TRAP
;
1641 if (!(env
->cp15
.scr_el3
& SCR_ST
)) {
1642 return CP_ACCESS_TRAP_EL3
;
1644 return CP_ACCESS_OK
;
1647 return CP_ACCESS_TRAP
;
1649 return CP_ACCESS_OK
;
1651 g_assert_not_reached();
1655 static uint64_t gt_get_countervalue(CPUARMState
*env
)
1657 return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
) / GTIMER_SCALE
;
1660 static void gt_recalc_timer(ARMCPU
*cpu
, int timeridx
)
1662 ARMGenericTimer
*gt
= &cpu
->env
.cp15
.c14_timer
[timeridx
];
1665 /* Timer enabled: calculate and set current ISTATUS, irq, and
1666 * reset timer to when ISTATUS next has to change
1668 uint64_t offset
= timeridx
== GTIMER_VIRT
?
1669 cpu
->env
.cp15
.cntvoff_el2
: 0;
1670 uint64_t count
= gt_get_countervalue(&cpu
->env
);
1671 /* Note that this must be unsigned 64 bit arithmetic: */
1672 int istatus
= count
- offset
>= gt
->cval
;
1676 gt
->ctl
= deposit32(gt
->ctl
, 2, 1, istatus
);
1678 irqstate
= (istatus
&& !(gt
->ctl
& 2));
1679 qemu_set_irq(cpu
->gt_timer_outputs
[timeridx
], irqstate
);
1682 /* Next transition is when count rolls back over to zero */
1683 nexttick
= UINT64_MAX
;
1685 /* Next transition is when we hit cval */
1686 nexttick
= gt
->cval
+ offset
;
1688 /* Note that the desired next expiry time might be beyond the
1689 * signed-64-bit range of a QEMUTimer -- in this case we just
1690 * set the timer for as far in the future as possible. When the
1691 * timer expires we will reset the timer for any remaining period.
1693 if (nexttick
> INT64_MAX
/ GTIMER_SCALE
) {
1694 nexttick
= INT64_MAX
/ GTIMER_SCALE
;
1696 timer_mod(cpu
->gt_timer
[timeridx
], nexttick
);
1697 trace_arm_gt_recalc(timeridx
, irqstate
, nexttick
);
1699 /* Timer disabled: ISTATUS and timer output always clear */
1701 qemu_set_irq(cpu
->gt_timer_outputs
[timeridx
], 0);
1702 timer_del(cpu
->gt_timer
[timeridx
]);
1703 trace_arm_gt_recalc_disabled(timeridx
);
1707 static void gt_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1710 ARMCPU
*cpu
= arm_env_get_cpu(env
);
1712 timer_del(cpu
->gt_timer
[timeridx
]);
1715 static uint64_t gt_cnt_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1717 return gt_get_countervalue(env
);
1720 static uint64_t gt_virt_cnt_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1722 return gt_get_countervalue(env
) - env
->cp15
.cntvoff_el2
;
1725 static void gt_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1729 trace_arm_gt_cval_write(timeridx
, value
);
1730 env
->cp15
.c14_timer
[timeridx
].cval
= value
;
1731 gt_recalc_timer(arm_env_get_cpu(env
), timeridx
);
1734 static uint64_t gt_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1737 uint64_t offset
= timeridx
== GTIMER_VIRT
? env
->cp15
.cntvoff_el2
: 0;
1739 return (uint32_t)(env
->cp15
.c14_timer
[timeridx
].cval
-
1740 (gt_get_countervalue(env
) - offset
));
1743 static void gt_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1747 uint64_t offset
= timeridx
== GTIMER_VIRT
? env
->cp15
.cntvoff_el2
: 0;
1749 trace_arm_gt_tval_write(timeridx
, value
);
1750 env
->cp15
.c14_timer
[timeridx
].cval
= gt_get_countervalue(env
) - offset
+
1751 sextract64(value
, 0, 32);
1752 gt_recalc_timer(arm_env_get_cpu(env
), timeridx
);
1755 static void gt_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1759 ARMCPU
*cpu
= arm_env_get_cpu(env
);
1760 uint32_t oldval
= env
->cp15
.c14_timer
[timeridx
].ctl
;
1762 trace_arm_gt_ctl_write(timeridx
, value
);
1763 env
->cp15
.c14_timer
[timeridx
].ctl
= deposit64(oldval
, 0, 2, value
);
1764 if ((oldval
^ value
) & 1) {
1765 /* Enable toggled */
1766 gt_recalc_timer(cpu
, timeridx
);
1767 } else if ((oldval
^ value
) & 2) {
1768 /* IMASK toggled: don't need to recalculate,
1769 * just set the interrupt line based on ISTATUS
1771 int irqstate
= (oldval
& 4) && !(value
& 2);
1773 trace_arm_gt_imask_toggle(timeridx
, irqstate
);
1774 qemu_set_irq(cpu
->gt_timer_outputs
[timeridx
], irqstate
);
1778 static void gt_phys_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1780 gt_timer_reset(env
, ri
, GTIMER_PHYS
);
1783 static void gt_phys_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1786 gt_cval_write(env
, ri
, GTIMER_PHYS
, value
);
1789 static uint64_t gt_phys_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1791 return gt_tval_read(env
, ri
, GTIMER_PHYS
);
1794 static void gt_phys_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1797 gt_tval_write(env
, ri
, GTIMER_PHYS
, value
);
1800 static void gt_phys_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1803 gt_ctl_write(env
, ri
, GTIMER_PHYS
, value
);
1806 static void gt_virt_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1808 gt_timer_reset(env
, ri
, GTIMER_VIRT
);
1811 static void gt_virt_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1814 gt_cval_write(env
, ri
, GTIMER_VIRT
, value
);
1817 static uint64_t gt_virt_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1819 return gt_tval_read(env
, ri
, GTIMER_VIRT
);
1822 static void gt_virt_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1825 gt_tval_write(env
, ri
, GTIMER_VIRT
, value
);
1828 static void gt_virt_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1831 gt_ctl_write(env
, ri
, GTIMER_VIRT
, value
);
1834 static void gt_cntvoff_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1837 ARMCPU
*cpu
= arm_env_get_cpu(env
);
1839 trace_arm_gt_cntvoff_write(value
);
1840 raw_write(env
, ri
, value
);
1841 gt_recalc_timer(cpu
, GTIMER_VIRT
);
1844 static void gt_hyp_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1846 gt_timer_reset(env
, ri
, GTIMER_HYP
);
1849 static void gt_hyp_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1852 gt_cval_write(env
, ri
, GTIMER_HYP
, value
);
1855 static uint64_t gt_hyp_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1857 return gt_tval_read(env
, ri
, GTIMER_HYP
);
1860 static void gt_hyp_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1863 gt_tval_write(env
, ri
, GTIMER_HYP
, value
);
1866 static void gt_hyp_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1869 gt_ctl_write(env
, ri
, GTIMER_HYP
, value
);
1872 static void gt_sec_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1874 gt_timer_reset(env
, ri
, GTIMER_SEC
);
1877 static void gt_sec_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1880 gt_cval_write(env
, ri
, GTIMER_SEC
, value
);
1883 static uint64_t gt_sec_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1885 return gt_tval_read(env
, ri
, GTIMER_SEC
);
1888 static void gt_sec_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1891 gt_tval_write(env
, ri
, GTIMER_SEC
, value
);
1894 static void gt_sec_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1897 gt_ctl_write(env
, ri
, GTIMER_SEC
, value
);
1900 void arm_gt_ptimer_cb(void *opaque
)
1902 ARMCPU
*cpu
= opaque
;
1904 gt_recalc_timer(cpu
, GTIMER_PHYS
);
1907 void arm_gt_vtimer_cb(void *opaque
)
1909 ARMCPU
*cpu
= opaque
;
1911 gt_recalc_timer(cpu
, GTIMER_VIRT
);
1914 void arm_gt_htimer_cb(void *opaque
)
1916 ARMCPU
*cpu
= opaque
;
1918 gt_recalc_timer(cpu
, GTIMER_HYP
);
1921 void arm_gt_stimer_cb(void *opaque
)
1923 ARMCPU
*cpu
= opaque
;
1925 gt_recalc_timer(cpu
, GTIMER_SEC
);
1928 static const ARMCPRegInfo generic_timer_cp_reginfo
[] = {
1929 /* Note that CNTFRQ is purely reads-as-written for the benefit
1930 * of software; writing it doesn't actually change the timer frequency.
1931 * Our reset value matches the fixed frequency we implement the timer at.
1933 { .name
= "CNTFRQ", .cp
= 15, .crn
= 14, .crm
= 0, .opc1
= 0, .opc2
= 0,
1934 .type
= ARM_CP_ALIAS
,
1935 .access
= PL1_RW
| PL0_R
, .accessfn
= gt_cntfrq_access
,
1936 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c14_cntfrq
),
1938 { .name
= "CNTFRQ_EL0", .state
= ARM_CP_STATE_AA64
,
1939 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 0,
1940 .access
= PL1_RW
| PL0_R
, .accessfn
= gt_cntfrq_access
,
1941 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_cntfrq
),
1942 .resetvalue
= (1000 * 1000 * 1000) / GTIMER_SCALE
,
1944 /* overall control: mostly access permissions */
1945 { .name
= "CNTKCTL", .state
= ARM_CP_STATE_BOTH
,
1946 .opc0
= 3, .opc1
= 0, .crn
= 14, .crm
= 1, .opc2
= 0,
1948 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_cntkctl
),
1951 /* per-timer control */
1952 { .name
= "CNTP_CTL", .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 1,
1953 .secure
= ARM_CP_SECSTATE_NS
,
1954 .type
= ARM_CP_IO
| ARM_CP_ALIAS
, .access
= PL1_RW
| PL0_R
,
1955 .accessfn
= gt_ptimer_access
,
1956 .fieldoffset
= offsetoflow32(CPUARMState
,
1957 cp15
.c14_timer
[GTIMER_PHYS
].ctl
),
1958 .writefn
= gt_phys_ctl_write
, .raw_writefn
= raw_write
,
1960 { .name
= "CNTP_CTL(S)",
1961 .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 1,
1962 .secure
= ARM_CP_SECSTATE_S
,
1963 .type
= ARM_CP_IO
| ARM_CP_ALIAS
, .access
= PL1_RW
| PL0_R
,
1964 .accessfn
= gt_ptimer_access
,
1965 .fieldoffset
= offsetoflow32(CPUARMState
,
1966 cp15
.c14_timer
[GTIMER_SEC
].ctl
),
1967 .writefn
= gt_sec_ctl_write
, .raw_writefn
= raw_write
,
1969 { .name
= "CNTP_CTL_EL0", .state
= ARM_CP_STATE_AA64
,
1970 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 2, .opc2
= 1,
1971 .type
= ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
1972 .accessfn
= gt_ptimer_access
,
1973 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_PHYS
].ctl
),
1975 .writefn
= gt_phys_ctl_write
, .raw_writefn
= raw_write
,
1977 { .name
= "CNTV_CTL", .cp
= 15, .crn
= 14, .crm
= 3, .opc1
= 0, .opc2
= 1,
1978 .type
= ARM_CP_IO
| ARM_CP_ALIAS
, .access
= PL1_RW
| PL0_R
,
1979 .accessfn
= gt_vtimer_access
,
1980 .fieldoffset
= offsetoflow32(CPUARMState
,
1981 cp15
.c14_timer
[GTIMER_VIRT
].ctl
),
1982 .writefn
= gt_virt_ctl_write
, .raw_writefn
= raw_write
,
1984 { .name
= "CNTV_CTL_EL0", .state
= ARM_CP_STATE_AA64
,
1985 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 3, .opc2
= 1,
1986 .type
= ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
1987 .accessfn
= gt_vtimer_access
,
1988 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_VIRT
].ctl
),
1990 .writefn
= gt_virt_ctl_write
, .raw_writefn
= raw_write
,
1992 /* TimerValue views: a 32 bit downcounting view of the underlying state */
1993 { .name
= "CNTP_TVAL", .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 0,
1994 .secure
= ARM_CP_SECSTATE_NS
,
1995 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
1996 .accessfn
= gt_ptimer_access
,
1997 .readfn
= gt_phys_tval_read
, .writefn
= gt_phys_tval_write
,
1999 { .name
= "CNTP_TVAL(S)",
2000 .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 0,
2001 .secure
= ARM_CP_SECSTATE_S
,
2002 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2003 .accessfn
= gt_ptimer_access
,
2004 .readfn
= gt_sec_tval_read
, .writefn
= gt_sec_tval_write
,
2006 { .name
= "CNTP_TVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2007 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 2, .opc2
= 0,
2008 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2009 .accessfn
= gt_ptimer_access
, .resetfn
= gt_phys_timer_reset
,
2010 .readfn
= gt_phys_tval_read
, .writefn
= gt_phys_tval_write
,
2012 { .name
= "CNTV_TVAL", .cp
= 15, .crn
= 14, .crm
= 3, .opc1
= 0, .opc2
= 0,
2013 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2014 .accessfn
= gt_vtimer_access
,
2015 .readfn
= gt_virt_tval_read
, .writefn
= gt_virt_tval_write
,
2017 { .name
= "CNTV_TVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2018 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 3, .opc2
= 0,
2019 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2020 .accessfn
= gt_vtimer_access
, .resetfn
= gt_virt_timer_reset
,
2021 .readfn
= gt_virt_tval_read
, .writefn
= gt_virt_tval_write
,
2023 /* The counter itself */
2024 { .name
= "CNTPCT", .cp
= 15, .crm
= 14, .opc1
= 0,
2025 .access
= PL0_R
, .type
= ARM_CP_64BIT
| ARM_CP_NO_RAW
| ARM_CP_IO
,
2026 .accessfn
= gt_pct_access
,
2027 .readfn
= gt_cnt_read
, .resetfn
= arm_cp_reset_ignore
,
2029 { .name
= "CNTPCT_EL0", .state
= ARM_CP_STATE_AA64
,
2030 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 1,
2031 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2032 .accessfn
= gt_pct_access
, .readfn
= gt_cnt_read
,
2034 { .name
= "CNTVCT", .cp
= 15, .crm
= 14, .opc1
= 1,
2035 .access
= PL0_R
, .type
= ARM_CP_64BIT
| ARM_CP_NO_RAW
| ARM_CP_IO
,
2036 .accessfn
= gt_vct_access
,
2037 .readfn
= gt_virt_cnt_read
, .resetfn
= arm_cp_reset_ignore
,
2039 { .name
= "CNTVCT_EL0", .state
= ARM_CP_STATE_AA64
,
2040 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 2,
2041 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2042 .accessfn
= gt_vct_access
, .readfn
= gt_virt_cnt_read
,
2044 /* Comparison value, indicating when the timer goes off */
2045 { .name
= "CNTP_CVAL", .cp
= 15, .crm
= 14, .opc1
= 2,
2046 .secure
= ARM_CP_SECSTATE_NS
,
2047 .access
= PL1_RW
| PL0_R
,
2048 .type
= ARM_CP_64BIT
| ARM_CP_IO
| ARM_CP_ALIAS
,
2049 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_PHYS
].cval
),
2050 .accessfn
= gt_ptimer_access
,
2051 .writefn
= gt_phys_cval_write
, .raw_writefn
= raw_write
,
2053 { .name
= "CNTP_CVAL(S)", .cp
= 15, .crm
= 14, .opc1
= 2,
2054 .secure
= ARM_CP_SECSTATE_S
,
2055 .access
= PL1_RW
| PL0_R
,
2056 .type
= ARM_CP_64BIT
| ARM_CP_IO
| ARM_CP_ALIAS
,
2057 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_SEC
].cval
),
2058 .accessfn
= gt_ptimer_access
,
2059 .writefn
= gt_sec_cval_write
, .raw_writefn
= raw_write
,
2061 { .name
= "CNTP_CVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2062 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 2, .opc2
= 2,
2063 .access
= PL1_RW
| PL0_R
,
2065 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_PHYS
].cval
),
2066 .resetvalue
= 0, .accessfn
= gt_ptimer_access
,
2067 .writefn
= gt_phys_cval_write
, .raw_writefn
= raw_write
,
2069 { .name
= "CNTV_CVAL", .cp
= 15, .crm
= 14, .opc1
= 3,
2070 .access
= PL1_RW
| PL0_R
,
2071 .type
= ARM_CP_64BIT
| ARM_CP_IO
| ARM_CP_ALIAS
,
2072 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_VIRT
].cval
),
2073 .accessfn
= gt_vtimer_access
,
2074 .writefn
= gt_virt_cval_write
, .raw_writefn
= raw_write
,
2076 { .name
= "CNTV_CVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2077 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 3, .opc2
= 2,
2078 .access
= PL1_RW
| PL0_R
,
2080 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_VIRT
].cval
),
2081 .resetvalue
= 0, .accessfn
= gt_vtimer_access
,
2082 .writefn
= gt_virt_cval_write
, .raw_writefn
= raw_write
,
2084 /* Secure timer -- this is actually restricted to only EL3
2085 * and configurably Secure-EL1 via the accessfn.
2087 { .name
= "CNTPS_TVAL_EL1", .state
= ARM_CP_STATE_AA64
,
2088 .opc0
= 3, .opc1
= 7, .crn
= 14, .crm
= 2, .opc2
= 0,
2089 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
,
2090 .accessfn
= gt_stimer_access
,
2091 .readfn
= gt_sec_tval_read
,
2092 .writefn
= gt_sec_tval_write
,
2093 .resetfn
= gt_sec_timer_reset
,
2095 { .name
= "CNTPS_CTL_EL1", .state
= ARM_CP_STATE_AA64
,
2096 .opc0
= 3, .opc1
= 7, .crn
= 14, .crm
= 2, .opc2
= 1,
2097 .type
= ARM_CP_IO
, .access
= PL1_RW
,
2098 .accessfn
= gt_stimer_access
,
2099 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_SEC
].ctl
),
2101 .writefn
= gt_sec_ctl_write
, .raw_writefn
= raw_write
,
2103 { .name
= "CNTPS_CVAL_EL1", .state
= ARM_CP_STATE_AA64
,
2104 .opc0
= 3, .opc1
= 7, .crn
= 14, .crm
= 2, .opc2
= 2,
2105 .type
= ARM_CP_IO
, .access
= PL1_RW
,
2106 .accessfn
= gt_stimer_access
,
2107 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_SEC
].cval
),
2108 .writefn
= gt_sec_cval_write
, .raw_writefn
= raw_write
,
2114 /* In user-mode none of the generic timer registers are accessible,
2115 * and their implementation depends on QEMU_CLOCK_VIRTUAL and qdev gpio outputs,
2116 * so instead just don't register any of them.
2118 static const ARMCPRegInfo generic_timer_cp_reginfo
[] = {
2124 static void par_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
2126 if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
2127 raw_write(env
, ri
, value
);
2128 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
2129 raw_write(env
, ri
, value
& 0xfffff6ff);
2131 raw_write(env
, ri
, value
& 0xfffff1ff);
2135 #ifndef CONFIG_USER_ONLY
2136 /* get_phys_addr() isn't present for user-mode-only targets */
2138 static CPAccessResult
ats_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2142 /* The ATS12NSO* operations must trap to EL3 if executed in
2143 * Secure EL1 (which can only happen if EL3 is AArch64).
2144 * They are simply UNDEF if executed from NS EL1.
2145 * They function normally from EL2 or EL3.
2147 if (arm_current_el(env
) == 1) {
2148 if (arm_is_secure_below_el3(env
)) {
2149 return CP_ACCESS_TRAP_UNCATEGORIZED_EL3
;
2151 return CP_ACCESS_TRAP_UNCATEGORIZED
;
2154 return CP_ACCESS_OK
;
2157 static uint64_t do_ats_write(CPUARMState
*env
, uint64_t value
,
2158 MMUAccessType access_type
, ARMMMUIdx mmu_idx
)
2161 target_ulong page_size
;
2166 MemTxAttrs attrs
= {};
2167 ARMMMUFaultInfo fi
= {};
2168 ARMCacheAttrs cacheattrs
= {};
2170 ret
= get_phys_addr(env
, value
, access_type
, mmu_idx
, &phys_addr
, &attrs
,
2171 &prot
, &page_size
, &fsr
, &fi
, &cacheattrs
);
2172 if (arm_s1_regime_using_lpae_format(env
, mmu_idx
)) {
2173 /* fsr is a DFSR/IFSR value for the long descriptor
2174 * translation table format, but with WnR always clear.
2175 * Convert it to a 64-bit PAR.
2177 par64
= (1 << 11); /* LPAE bit always set */
2179 par64
|= phys_addr
& ~0xfffULL
;
2180 if (!attrs
.secure
) {
2181 par64
|= (1 << 9); /* NS */
2183 par64
|= (uint64_t)cacheattrs
.attrs
<< 56; /* ATTR */
2184 par64
|= cacheattrs
.shareability
<< 7; /* SH */
2187 par64
|= (fsr
& 0x3f) << 1; /* FS */
2188 /* Note that S2WLK and FSTAGE are always zero, because we don't
2189 * implement virtualization and therefore there can't be a stage 2
2194 /* fsr is a DFSR/IFSR value for the short descriptor
2195 * translation table format (with WnR always clear).
2196 * Convert it to a 32-bit PAR.
2199 /* We do not set any attribute bits in the PAR */
2200 if (page_size
== (1 << 24)
2201 && arm_feature(env
, ARM_FEATURE_V7
)) {
2202 par64
= (phys_addr
& 0xff000000) | (1 << 1);
2204 par64
= phys_addr
& 0xfffff000;
2206 if (!attrs
.secure
) {
2207 par64
|= (1 << 9); /* NS */
2210 par64
= ((fsr
& (1 << 10)) >> 5) | ((fsr
& (1 << 12)) >> 6) |
2211 ((fsr
& 0xf) << 1) | 1;
2217 static void ats_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
2219 MMUAccessType access_type
= ri
->opc2
& 1 ? MMU_DATA_STORE
: MMU_DATA_LOAD
;
2222 int el
= arm_current_el(env
);
2223 bool secure
= arm_is_secure_below_el3(env
);
2225 switch (ri
->opc2
& 6) {
2227 /* stage 1 current state PL1: ATS1CPR, ATS1CPW */
2230 mmu_idx
= ARMMMUIdx_S1E3
;
2233 mmu_idx
= ARMMMUIdx_S1NSE1
;
2236 mmu_idx
= secure
? ARMMMUIdx_S1SE1
: ARMMMUIdx_S1NSE1
;
2239 g_assert_not_reached();
2243 /* stage 1 current state PL0: ATS1CUR, ATS1CUW */
2246 mmu_idx
= ARMMMUIdx_S1SE0
;
2249 mmu_idx
= ARMMMUIdx_S1NSE0
;
2252 mmu_idx
= secure
? ARMMMUIdx_S1SE0
: ARMMMUIdx_S1NSE0
;
2255 g_assert_not_reached();
2259 /* stage 1+2 NonSecure PL1: ATS12NSOPR, ATS12NSOPW */
2260 mmu_idx
= ARMMMUIdx_S12NSE1
;
2263 /* stage 1+2 NonSecure PL0: ATS12NSOUR, ATS12NSOUW */
2264 mmu_idx
= ARMMMUIdx_S12NSE0
;
2267 g_assert_not_reached();
2270 par64
= do_ats_write(env
, value
, access_type
, mmu_idx
);
2272 A32_BANKED_CURRENT_REG_SET(env
, par
, par64
);
2275 static void ats1h_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2278 MMUAccessType access_type
= ri
->opc2
& 1 ? MMU_DATA_STORE
: MMU_DATA_LOAD
;
2281 par64
= do_ats_write(env
, value
, access_type
, ARMMMUIdx_S2NS
);
2283 A32_BANKED_CURRENT_REG_SET(env
, par
, par64
);
2286 static CPAccessResult
at_s1e2_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2289 if (arm_current_el(env
) == 3 && !(env
->cp15
.scr_el3
& SCR_NS
)) {
2290 return CP_ACCESS_TRAP
;
2292 return CP_ACCESS_OK
;
2295 static void ats_write64(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2298 MMUAccessType access_type
= ri
->opc2
& 1 ? MMU_DATA_STORE
: MMU_DATA_LOAD
;
2300 int secure
= arm_is_secure_below_el3(env
);
2302 switch (ri
->opc2
& 6) {
2305 case 0: /* AT S1E1R, AT S1E1W */
2306 mmu_idx
= secure
? ARMMMUIdx_S1SE1
: ARMMMUIdx_S1NSE1
;
2308 case 4: /* AT S1E2R, AT S1E2W */
2309 mmu_idx
= ARMMMUIdx_S1E2
;
2311 case 6: /* AT S1E3R, AT S1E3W */
2312 mmu_idx
= ARMMMUIdx_S1E3
;
2315 g_assert_not_reached();
2318 case 2: /* AT S1E0R, AT S1E0W */
2319 mmu_idx
= secure
? ARMMMUIdx_S1SE0
: ARMMMUIdx_S1NSE0
;
2321 case 4: /* AT S12E1R, AT S12E1W */
2322 mmu_idx
= secure
? ARMMMUIdx_S1SE1
: ARMMMUIdx_S12NSE1
;
2324 case 6: /* AT S12E0R, AT S12E0W */
2325 mmu_idx
= secure
? ARMMMUIdx_S1SE0
: ARMMMUIdx_S12NSE0
;
2328 g_assert_not_reached();
2331 env
->cp15
.par_el
[1] = do_ats_write(env
, value
, access_type
, mmu_idx
);
2335 static const ARMCPRegInfo vapa_cp_reginfo
[] = {
2336 { .name
= "PAR", .cp
= 15, .crn
= 7, .crm
= 4, .opc1
= 0, .opc2
= 0,
2337 .access
= PL1_RW
, .resetvalue
= 0,
2338 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.par_s
),
2339 offsetoflow32(CPUARMState
, cp15
.par_ns
) },
2340 .writefn
= par_write
},
2341 #ifndef CONFIG_USER_ONLY
2342 /* This underdecoding is safe because the reginfo is NO_RAW. */
2343 { .name
= "ATS", .cp
= 15, .crn
= 7, .crm
= 8, .opc1
= 0, .opc2
= CP_ANY
,
2344 .access
= PL1_W
, .accessfn
= ats_access
,
2345 .writefn
= ats_write
, .type
= ARM_CP_NO_RAW
},
2350 /* Return basic MPU access permission bits. */
2351 static uint32_t simple_mpu_ap_bits(uint32_t val
)
2358 for (i
= 0; i
< 16; i
+= 2) {
2359 ret
|= (val
>> i
) & mask
;
2365 /* Pad basic MPU access permission bits to extended format. */
2366 static uint32_t extended_mpu_ap_bits(uint32_t val
)
2373 for (i
= 0; i
< 16; i
+= 2) {
2374 ret
|= (val
& mask
) << i
;
2380 static void pmsav5_data_ap_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2383 env
->cp15
.pmsav5_data_ap
= extended_mpu_ap_bits(value
);
2386 static uint64_t pmsav5_data_ap_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2388 return simple_mpu_ap_bits(env
->cp15
.pmsav5_data_ap
);
2391 static void pmsav5_insn_ap_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2394 env
->cp15
.pmsav5_insn_ap
= extended_mpu_ap_bits(value
);
2397 static uint64_t pmsav5_insn_ap_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2399 return simple_mpu_ap_bits(env
->cp15
.pmsav5_insn_ap
);
2402 static uint64_t pmsav7_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2404 uint32_t *u32p
= *(uint32_t **)raw_ptr(env
, ri
);
2410 u32p
+= env
->pmsav7
.rnr
[M_REG_NS
];
2414 static void pmsav7_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2417 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2418 uint32_t *u32p
= *(uint32_t **)raw_ptr(env
, ri
);
2424 u32p
+= env
->pmsav7
.rnr
[M_REG_NS
];
2425 tlb_flush(CPU(cpu
)); /* Mappings may have changed - purge! */
2429 static void pmsav7_rgnr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2432 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2433 uint32_t nrgs
= cpu
->pmsav7_dregion
;
2435 if (value
>= nrgs
) {
2436 qemu_log_mask(LOG_GUEST_ERROR
,
2437 "PMSAv7 RGNR write >= # supported regions, %" PRIu32
2438 " > %" PRIu32
"\n", (uint32_t)value
, nrgs
);
2442 raw_write(env
, ri
, value
);
2445 static const ARMCPRegInfo pmsav7_cp_reginfo
[] = {
2446 /* Reset for all these registers is handled in arm_cpu_reset(),
2447 * because the PMSAv7 is also used by M-profile CPUs, which do
2448 * not register cpregs but still need the state to be reset.
2450 { .name
= "DRBAR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 1, .opc2
= 0,
2451 .access
= PL1_RW
, .type
= ARM_CP_NO_RAW
,
2452 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.drbar
),
2453 .readfn
= pmsav7_read
, .writefn
= pmsav7_write
,
2454 .resetfn
= arm_cp_reset_ignore
},
2455 { .name
= "DRSR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 1, .opc2
= 2,
2456 .access
= PL1_RW
, .type
= ARM_CP_NO_RAW
,
2457 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.drsr
),
2458 .readfn
= pmsav7_read
, .writefn
= pmsav7_write
,
2459 .resetfn
= arm_cp_reset_ignore
},
2460 { .name
= "DRACR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 1, .opc2
= 4,
2461 .access
= PL1_RW
, .type
= ARM_CP_NO_RAW
,
2462 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.dracr
),
2463 .readfn
= pmsav7_read
, .writefn
= pmsav7_write
,
2464 .resetfn
= arm_cp_reset_ignore
},
2465 { .name
= "RGNR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 2, .opc2
= 0,
2467 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.rnr
[M_REG_NS
]),
2468 .writefn
= pmsav7_rgnr_write
,
2469 .resetfn
= arm_cp_reset_ignore
},
2473 static const ARMCPRegInfo pmsav5_cp_reginfo
[] = {
2474 { .name
= "DATA_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 0,
2475 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
,
2476 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_data_ap
),
2477 .readfn
= pmsav5_data_ap_read
, .writefn
= pmsav5_data_ap_write
, },
2478 { .name
= "INSN_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 1,
2479 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
,
2480 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_insn_ap
),
2481 .readfn
= pmsav5_insn_ap_read
, .writefn
= pmsav5_insn_ap_write
, },
2482 { .name
= "DATA_EXT_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 2,
2484 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_data_ap
),
2486 { .name
= "INSN_EXT_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 3,
2488 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_insn_ap
),
2490 { .name
= "DCACHE_CFG", .cp
= 15, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 0,
2492 .fieldoffset
= offsetof(CPUARMState
, cp15
.c2_data
), .resetvalue
= 0, },
2493 { .name
= "ICACHE_CFG", .cp
= 15, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 1,
2495 .fieldoffset
= offsetof(CPUARMState
, cp15
.c2_insn
), .resetvalue
= 0, },
2496 /* Protection region base and size registers */
2497 { .name
= "946_PRBS0", .cp
= 15, .crn
= 6, .crm
= 0, .opc1
= 0,
2498 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2499 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[0]) },
2500 { .name
= "946_PRBS1", .cp
= 15, .crn
= 6, .crm
= 1, .opc1
= 0,
2501 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2502 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[1]) },
2503 { .name
= "946_PRBS2", .cp
= 15, .crn
= 6, .crm
= 2, .opc1
= 0,
2504 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2505 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[2]) },
2506 { .name
= "946_PRBS3", .cp
= 15, .crn
= 6, .crm
= 3, .opc1
= 0,
2507 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2508 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[3]) },
2509 { .name
= "946_PRBS4", .cp
= 15, .crn
= 6, .crm
= 4, .opc1
= 0,
2510 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2511 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[4]) },
2512 { .name
= "946_PRBS5", .cp
= 15, .crn
= 6, .crm
= 5, .opc1
= 0,
2513 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2514 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[5]) },
2515 { .name
= "946_PRBS6", .cp
= 15, .crn
= 6, .crm
= 6, .opc1
= 0,
2516 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2517 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[6]) },
2518 { .name
= "946_PRBS7", .cp
= 15, .crn
= 6, .crm
= 7, .opc1
= 0,
2519 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2520 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[7]) },
2524 static void vmsa_ttbcr_raw_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2527 TCR
*tcr
= raw_ptr(env
, ri
);
2528 int maskshift
= extract32(value
, 0, 3);
2530 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
2531 if (arm_feature(env
, ARM_FEATURE_LPAE
) && (value
& TTBCR_EAE
)) {
2532 /* Pre ARMv8 bits [21:19], [15:14] and [6:3] are UNK/SBZP when
2533 * using Long-desciptor translation table format */
2534 value
&= ~((7 << 19) | (3 << 14) | (0xf << 3));
2535 } else if (arm_feature(env
, ARM_FEATURE_EL3
)) {
2536 /* In an implementation that includes the Security Extensions
2537 * TTBCR has additional fields PD0 [4] and PD1 [5] for
2538 * Short-descriptor translation table format.
2540 value
&= TTBCR_PD1
| TTBCR_PD0
| TTBCR_N
;
2546 /* Update the masks corresponding to the TCR bank being written
2547 * Note that we always calculate mask and base_mask, but
2548 * they are only used for short-descriptor tables (ie if EAE is 0);
2549 * for long-descriptor tables the TCR fields are used differently
2550 * and the mask and base_mask values are meaningless.
2552 tcr
->raw_tcr
= value
;
2553 tcr
->mask
= ~(((uint32_t)0xffffffffu
) >> maskshift
);
2554 tcr
->base_mask
= ~((uint32_t)0x3fffu
>> maskshift
);
2557 static void vmsa_ttbcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2560 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2562 if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
2563 /* With LPAE the TTBCR could result in a change of ASID
2564 * via the TTBCR.A1 bit, so do a TLB flush.
2566 tlb_flush(CPU(cpu
));
2568 vmsa_ttbcr_raw_write(env
, ri
, value
);
2571 static void vmsa_ttbcr_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2573 TCR
*tcr
= raw_ptr(env
, ri
);
2575 /* Reset both the TCR as well as the masks corresponding to the bank of
2576 * the TCR being reset.
2580 tcr
->base_mask
= 0xffffc000u
;
2583 static void vmsa_tcr_el1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2586 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2587 TCR
*tcr
= raw_ptr(env
, ri
);
2589 /* For AArch64 the A1 bit could result in a change of ASID, so TLB flush. */
2590 tlb_flush(CPU(cpu
));
2591 tcr
->raw_tcr
= value
;
2594 static void vmsa_ttbr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2597 /* 64 bit accesses to the TTBRs can change the ASID and so we
2598 * must flush the TLB.
2600 if (cpreg_field_is_64bit(ri
)) {
2601 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2603 tlb_flush(CPU(cpu
));
2605 raw_write(env
, ri
, value
);
2608 static void vttbr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2611 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2612 CPUState
*cs
= CPU(cpu
);
2614 /* Accesses to VTTBR may change the VMID so we must flush the TLB. */
2615 if (raw_read(env
, ri
) != value
) {
2616 tlb_flush_by_mmuidx(cs
,
2617 ARMMMUIdxBit_S12NSE1
|
2618 ARMMMUIdxBit_S12NSE0
|
2620 raw_write(env
, ri
, value
);
2624 static const ARMCPRegInfo vmsa_pmsa_cp_reginfo
[] = {
2625 { .name
= "DFSR", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 0,
2626 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
,
2627 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.dfsr_s
),
2628 offsetoflow32(CPUARMState
, cp15
.dfsr_ns
) }, },
2629 { .name
= "IFSR", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 1,
2630 .access
= PL1_RW
, .resetvalue
= 0,
2631 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.ifsr_s
),
2632 offsetoflow32(CPUARMState
, cp15
.ifsr_ns
) } },
2633 { .name
= "DFAR", .cp
= 15, .opc1
= 0, .crn
= 6, .crm
= 0, .opc2
= 0,
2634 .access
= PL1_RW
, .resetvalue
= 0,
2635 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.dfar_s
),
2636 offsetof(CPUARMState
, cp15
.dfar_ns
) } },
2637 { .name
= "FAR_EL1", .state
= ARM_CP_STATE_AA64
,
2638 .opc0
= 3, .crn
= 6, .crm
= 0, .opc1
= 0, .opc2
= 0,
2639 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.far_el
[1]),
2644 static const ARMCPRegInfo vmsa_cp_reginfo
[] = {
2645 { .name
= "ESR_EL1", .state
= ARM_CP_STATE_AA64
,
2646 .opc0
= 3, .crn
= 5, .crm
= 2, .opc1
= 0, .opc2
= 0,
2648 .fieldoffset
= offsetof(CPUARMState
, cp15
.esr_el
[1]), .resetvalue
= 0, },
2649 { .name
= "TTBR0_EL1", .state
= ARM_CP_STATE_BOTH
,
2650 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 0, .opc2
= 0,
2651 .access
= PL1_RW
, .writefn
= vmsa_ttbr_write
, .resetvalue
= 0,
2652 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr0_s
),
2653 offsetof(CPUARMState
, cp15
.ttbr0_ns
) } },
2654 { .name
= "TTBR1_EL1", .state
= ARM_CP_STATE_BOTH
,
2655 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 0, .opc2
= 1,
2656 .access
= PL1_RW
, .writefn
= vmsa_ttbr_write
, .resetvalue
= 0,
2657 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr1_s
),
2658 offsetof(CPUARMState
, cp15
.ttbr1_ns
) } },
2659 { .name
= "TCR_EL1", .state
= ARM_CP_STATE_AA64
,
2660 .opc0
= 3, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 2,
2661 .access
= PL1_RW
, .writefn
= vmsa_tcr_el1_write
,
2662 .resetfn
= vmsa_ttbcr_reset
, .raw_writefn
= raw_write
,
2663 .fieldoffset
= offsetof(CPUARMState
, cp15
.tcr_el
[1]) },
2664 { .name
= "TTBCR", .cp
= 15, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 2,
2665 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
, .writefn
= vmsa_ttbcr_write
,
2666 .raw_writefn
= vmsa_ttbcr_raw_write
,
2667 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tcr_el
[3]),
2668 offsetoflow32(CPUARMState
, cp15
.tcr_el
[1])} },
2672 static void omap_ticonfig_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2675 env
->cp15
.c15_ticonfig
= value
& 0xe7;
2676 /* The OS_TYPE bit in this register changes the reported CPUID! */
2677 env
->cp15
.c0_cpuid
= (value
& (1 << 5)) ?
2678 ARM_CPUID_TI915T
: ARM_CPUID_TI925T
;
2681 static void omap_threadid_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2684 env
->cp15
.c15_threadid
= value
& 0xffff;
2687 static void omap_wfi_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2690 /* Wait-for-interrupt (deprecated) */
2691 cpu_interrupt(CPU(arm_env_get_cpu(env
)), CPU_INTERRUPT_HALT
);
2694 static void omap_cachemaint_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2697 /* On OMAP there are registers indicating the max/min index of dcache lines
2698 * containing a dirty line; cache flush operations have to reset these.
2700 env
->cp15
.c15_i_max
= 0x000;
2701 env
->cp15
.c15_i_min
= 0xff0;
2704 static const ARMCPRegInfo omap_cp_reginfo
[] = {
2705 { .name
= "DFSR", .cp
= 15, .crn
= 5, .crm
= CP_ANY
,
2706 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_OVERRIDE
,
2707 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.esr_el
[1]),
2709 { .name
= "", .cp
= 15, .crn
= 15, .crm
= 0, .opc1
= 0, .opc2
= 0,
2710 .access
= PL1_RW
, .type
= ARM_CP_NOP
},
2711 { .name
= "TICONFIG", .cp
= 15, .crn
= 15, .crm
= 1, .opc1
= 0, .opc2
= 0,
2713 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_ticonfig
), .resetvalue
= 0,
2714 .writefn
= omap_ticonfig_write
},
2715 { .name
= "IMAX", .cp
= 15, .crn
= 15, .crm
= 2, .opc1
= 0, .opc2
= 0,
2717 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_i_max
), .resetvalue
= 0, },
2718 { .name
= "IMIN", .cp
= 15, .crn
= 15, .crm
= 3, .opc1
= 0, .opc2
= 0,
2719 .access
= PL1_RW
, .resetvalue
= 0xff0,
2720 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_i_min
) },
2721 { .name
= "THREADID", .cp
= 15, .crn
= 15, .crm
= 4, .opc1
= 0, .opc2
= 0,
2723 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_threadid
), .resetvalue
= 0,
2724 .writefn
= omap_threadid_write
},
2725 { .name
= "TI925T_STATUS", .cp
= 15, .crn
= 15,
2726 .crm
= 8, .opc1
= 0, .opc2
= 0, .access
= PL1_RW
,
2727 .type
= ARM_CP_NO_RAW
,
2728 .readfn
= arm_cp_read_zero
, .writefn
= omap_wfi_write
, },
2729 /* TODO: Peripheral port remap register:
2730 * On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller
2731 * base address at $rn & ~0xfff and map size of 0x200 << ($rn & 0xfff),
2734 { .name
= "OMAP_CACHEMAINT", .cp
= 15, .crn
= 7, .crm
= CP_ANY
,
2735 .opc1
= 0, .opc2
= CP_ANY
, .access
= PL1_W
,
2736 .type
= ARM_CP_OVERRIDE
| ARM_CP_NO_RAW
,
2737 .writefn
= omap_cachemaint_write
},
2738 { .name
= "C9", .cp
= 15, .crn
= 9,
2739 .crm
= CP_ANY
, .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
,
2740 .type
= ARM_CP_CONST
| ARM_CP_OVERRIDE
, .resetvalue
= 0 },
2744 static void xscale_cpar_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2747 env
->cp15
.c15_cpar
= value
& 0x3fff;
2750 static const ARMCPRegInfo xscale_cp_reginfo
[] = {
2751 { .name
= "XSCALE_CPAR",
2752 .cp
= 15, .crn
= 15, .crm
= 1, .opc1
= 0, .opc2
= 0, .access
= PL1_RW
,
2753 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_cpar
), .resetvalue
= 0,
2754 .writefn
= xscale_cpar_write
, },
2755 { .name
= "XSCALE_AUXCR",
2756 .cp
= 15, .crn
= 1, .crm
= 0, .opc1
= 0, .opc2
= 1, .access
= PL1_RW
,
2757 .fieldoffset
= offsetof(CPUARMState
, cp15
.c1_xscaleauxcr
),
2759 /* XScale specific cache-lockdown: since we have no cache we NOP these
2760 * and hope the guest does not really rely on cache behaviour.
2762 { .name
= "XSCALE_LOCK_ICACHE_LINE",
2763 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 1, .opc2
= 0,
2764 .access
= PL1_W
, .type
= ARM_CP_NOP
},
2765 { .name
= "XSCALE_UNLOCK_ICACHE",
2766 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 1, .opc2
= 1,
2767 .access
= PL1_W
, .type
= ARM_CP_NOP
},
2768 { .name
= "XSCALE_DCACHE_LOCK",
2769 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 2, .opc2
= 0,
2770 .access
= PL1_RW
, .type
= ARM_CP_NOP
},
2771 { .name
= "XSCALE_UNLOCK_DCACHE",
2772 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 2, .opc2
= 1,
2773 .access
= PL1_W
, .type
= ARM_CP_NOP
},
2777 static const ARMCPRegInfo dummy_c15_cp_reginfo
[] = {
2778 /* RAZ/WI the whole crn=15 space, when we don't have a more specific
2779 * implementation of this implementation-defined space.
2780 * Ideally this should eventually disappear in favour of actually
2781 * implementing the correct behaviour for all cores.
2783 { .name
= "C15_IMPDEF", .cp
= 15, .crn
= 15,
2784 .crm
= CP_ANY
, .opc1
= CP_ANY
, .opc2
= CP_ANY
,
2786 .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
| ARM_CP_OVERRIDE
,
2791 static const ARMCPRegInfo cache_dirty_status_cp_reginfo
[] = {
2792 /* Cache status: RAZ because we have no cache so it's always clean */
2793 { .name
= "CDSR", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 6,
2794 .access
= PL1_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
2799 static const ARMCPRegInfo cache_block_ops_cp_reginfo
[] = {
2800 /* We never have a a block transfer operation in progress */
2801 { .name
= "BXSR", .cp
= 15, .crn
= 7, .crm
= 12, .opc1
= 0, .opc2
= 4,
2802 .access
= PL0_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
2804 /* The cache ops themselves: these all NOP for QEMU */
2805 { .name
= "IICR", .cp
= 15, .crm
= 5, .opc1
= 0,
2806 .access
= PL1_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2807 { .name
= "IDCR", .cp
= 15, .crm
= 6, .opc1
= 0,
2808 .access
= PL1_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2809 { .name
= "CDCR", .cp
= 15, .crm
= 12, .opc1
= 0,
2810 .access
= PL0_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2811 { .name
= "PIR", .cp
= 15, .crm
= 12, .opc1
= 1,
2812 .access
= PL0_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2813 { .name
= "PDR", .cp
= 15, .crm
= 12, .opc1
= 2,
2814 .access
= PL0_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2815 { .name
= "CIDCR", .cp
= 15, .crm
= 14, .opc1
= 0,
2816 .access
= PL1_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2820 static const ARMCPRegInfo cache_test_clean_cp_reginfo
[] = {
2821 /* The cache test-and-clean instructions always return (1 << 30)
2822 * to indicate that there are no dirty cache lines.
2824 { .name
= "TC_DCACHE", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 3,
2825 .access
= PL0_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
2826 .resetvalue
= (1 << 30) },
2827 { .name
= "TCI_DCACHE", .cp
= 15, .crn
= 7, .crm
= 14, .opc1
= 0, .opc2
= 3,
2828 .access
= PL0_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
2829 .resetvalue
= (1 << 30) },
2833 static const ARMCPRegInfo strongarm_cp_reginfo
[] = {
2834 /* Ignore ReadBuffer accesses */
2835 { .name
= "C9_READBUFFER", .cp
= 15, .crn
= 9,
2836 .crm
= CP_ANY
, .opc1
= CP_ANY
, .opc2
= CP_ANY
,
2837 .access
= PL1_RW
, .resetvalue
= 0,
2838 .type
= ARM_CP_CONST
| ARM_CP_OVERRIDE
| ARM_CP_NO_RAW
},
2842 static uint64_t midr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2844 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2845 unsigned int cur_el
= arm_current_el(env
);
2846 bool secure
= arm_is_secure(env
);
2848 if (arm_feature(&cpu
->env
, ARM_FEATURE_EL2
) && !secure
&& cur_el
== 1) {
2849 return env
->cp15
.vpidr_el2
;
2851 return raw_read(env
, ri
);
2854 static uint64_t mpidr_read_val(CPUARMState
*env
)
2856 ARMCPU
*cpu
= ARM_CPU(arm_env_get_cpu(env
));
2857 uint64_t mpidr
= cpu
->mp_affinity
;
2859 if (arm_feature(env
, ARM_FEATURE_V7MP
)) {
2860 mpidr
|= (1U << 31);
2861 /* Cores which are uniprocessor (non-coherent)
2862 * but still implement the MP extensions set
2863 * bit 30. (For instance, Cortex-R5).
2865 if (cpu
->mp_is_up
) {
2866 mpidr
|= (1u << 30);
2872 static uint64_t mpidr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2874 unsigned int cur_el
= arm_current_el(env
);
2875 bool secure
= arm_is_secure(env
);
2877 if (arm_feature(env
, ARM_FEATURE_EL2
) && !secure
&& cur_el
== 1) {
2878 return env
->cp15
.vmpidr_el2
;
2880 return mpidr_read_val(env
);
2883 static const ARMCPRegInfo mpidr_cp_reginfo
[] = {
2884 { .name
= "MPIDR", .state
= ARM_CP_STATE_BOTH
,
2885 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 5,
2886 .access
= PL1_R
, .readfn
= mpidr_read
, .type
= ARM_CP_NO_RAW
},
2890 static const ARMCPRegInfo lpae_cp_reginfo
[] = {
2892 { .name
= "AMAIR0", .state
= ARM_CP_STATE_BOTH
,
2893 .opc0
= 3, .crn
= 10, .crm
= 3, .opc1
= 0, .opc2
= 0,
2894 .access
= PL1_RW
, .type
= ARM_CP_CONST
,
2896 /* AMAIR1 is mapped to AMAIR_EL1[63:32] */
2897 { .name
= "AMAIR1", .cp
= 15, .crn
= 10, .crm
= 3, .opc1
= 0, .opc2
= 1,
2898 .access
= PL1_RW
, .type
= ARM_CP_CONST
,
2900 { .name
= "PAR", .cp
= 15, .crm
= 7, .opc1
= 0,
2901 .access
= PL1_RW
, .type
= ARM_CP_64BIT
, .resetvalue
= 0,
2902 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.par_s
),
2903 offsetof(CPUARMState
, cp15
.par_ns
)} },
2904 { .name
= "TTBR0", .cp
= 15, .crm
= 2, .opc1
= 0,
2905 .access
= PL1_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
2906 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr0_s
),
2907 offsetof(CPUARMState
, cp15
.ttbr0_ns
) },
2908 .writefn
= vmsa_ttbr_write
, },
2909 { .name
= "TTBR1", .cp
= 15, .crm
= 2, .opc1
= 1,
2910 .access
= PL1_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
2911 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr1_s
),
2912 offsetof(CPUARMState
, cp15
.ttbr1_ns
) },
2913 .writefn
= vmsa_ttbr_write
, },
2917 static uint64_t aa64_fpcr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2919 return vfp_get_fpcr(env
);
2922 static void aa64_fpcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2925 vfp_set_fpcr(env
, value
);
2928 static uint64_t aa64_fpsr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2930 return vfp_get_fpsr(env
);
2933 static void aa64_fpsr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2936 vfp_set_fpsr(env
, value
);
2939 static CPAccessResult
aa64_daif_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2942 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_UMA
)) {
2943 return CP_ACCESS_TRAP
;
2945 return CP_ACCESS_OK
;
2948 static void aa64_daif_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2951 env
->daif
= value
& PSTATE_DAIF
;
2954 static CPAccessResult
aa64_cacheop_access(CPUARMState
*env
,
2955 const ARMCPRegInfo
*ri
,
2958 /* Cache invalidate/clean: NOP, but EL0 must UNDEF unless
2959 * SCTLR_EL1.UCI is set.
2961 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_UCI
)) {
2962 return CP_ACCESS_TRAP
;
2964 return CP_ACCESS_OK
;
2967 /* See: D4.7.2 TLB maintenance requirements and the TLB maintenance instructions
2968 * Page D4-1736 (DDI0487A.b)
2971 static void tlbi_aa64_vmalle1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2974 CPUState
*cs
= ENV_GET_CPU(env
);
2976 if (arm_is_secure_below_el3(env
)) {
2977 tlb_flush_by_mmuidx(cs
,
2978 ARMMMUIdxBit_S1SE1
|
2979 ARMMMUIdxBit_S1SE0
);
2981 tlb_flush_by_mmuidx(cs
,
2982 ARMMMUIdxBit_S12NSE1
|
2983 ARMMMUIdxBit_S12NSE0
);
2987 static void tlbi_aa64_vmalle1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2990 CPUState
*cs
= ENV_GET_CPU(env
);
2991 bool sec
= arm_is_secure_below_el3(env
);
2994 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
2995 ARMMMUIdxBit_S1SE1
|
2996 ARMMMUIdxBit_S1SE0
);
2998 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
2999 ARMMMUIdxBit_S12NSE1
|
3000 ARMMMUIdxBit_S12NSE0
);
3004 static void tlbi_aa64_alle1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3007 /* Note that the 'ALL' scope must invalidate both stage 1 and
3008 * stage 2 translations, whereas most other scopes only invalidate
3009 * stage 1 translations.
3011 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3012 CPUState
*cs
= CPU(cpu
);
3014 if (arm_is_secure_below_el3(env
)) {
3015 tlb_flush_by_mmuidx(cs
,
3016 ARMMMUIdxBit_S1SE1
|
3017 ARMMMUIdxBit_S1SE0
);
3019 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
3020 tlb_flush_by_mmuidx(cs
,
3021 ARMMMUIdxBit_S12NSE1
|
3022 ARMMMUIdxBit_S12NSE0
|
3025 tlb_flush_by_mmuidx(cs
,
3026 ARMMMUIdxBit_S12NSE1
|
3027 ARMMMUIdxBit_S12NSE0
);
3032 static void tlbi_aa64_alle2_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3035 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3036 CPUState
*cs
= CPU(cpu
);
3038 tlb_flush_by_mmuidx(cs
, ARMMMUIdxBit_S1E2
);
3041 static void tlbi_aa64_alle3_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3044 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3045 CPUState
*cs
= CPU(cpu
);
3047 tlb_flush_by_mmuidx(cs
, ARMMMUIdxBit_S1E3
);
3050 static void tlbi_aa64_alle1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3053 /* Note that the 'ALL' scope must invalidate both stage 1 and
3054 * stage 2 translations, whereas most other scopes only invalidate
3055 * stage 1 translations.
3057 CPUState
*cs
= ENV_GET_CPU(env
);
3058 bool sec
= arm_is_secure_below_el3(env
);
3059 bool has_el2
= arm_feature(env
, ARM_FEATURE_EL2
);
3062 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3063 ARMMMUIdxBit_S1SE1
|
3064 ARMMMUIdxBit_S1SE0
);
3065 } else if (has_el2
) {
3066 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3067 ARMMMUIdxBit_S12NSE1
|
3068 ARMMMUIdxBit_S12NSE0
|
3071 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3072 ARMMMUIdxBit_S12NSE1
|
3073 ARMMMUIdxBit_S12NSE0
);
3077 static void tlbi_aa64_alle2is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3080 CPUState
*cs
= ENV_GET_CPU(env
);
3082 tlb_flush_by_mmuidx_all_cpus_synced(cs
, ARMMMUIdxBit_S1E2
);
3085 static void tlbi_aa64_alle3is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3088 CPUState
*cs
= ENV_GET_CPU(env
);
3090 tlb_flush_by_mmuidx_all_cpus_synced(cs
, ARMMMUIdxBit_S1E3
);
3093 static void tlbi_aa64_vae1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3096 /* Invalidate by VA, EL1&0 (AArch64 version).
3097 * Currently handles all of VAE1, VAAE1, VAALE1 and VALE1,
3098 * since we don't support flush-for-specific-ASID-only or
3099 * flush-last-level-only.
3101 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3102 CPUState
*cs
= CPU(cpu
);
3103 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3105 if (arm_is_secure_below_el3(env
)) {
3106 tlb_flush_page_by_mmuidx(cs
, pageaddr
,
3107 ARMMMUIdxBit_S1SE1
|
3108 ARMMMUIdxBit_S1SE0
);
3110 tlb_flush_page_by_mmuidx(cs
, pageaddr
,
3111 ARMMMUIdxBit_S12NSE1
|
3112 ARMMMUIdxBit_S12NSE0
);
3116 static void tlbi_aa64_vae2_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3119 /* Invalidate by VA, EL2
3120 * Currently handles both VAE2 and VALE2, since we don't support
3121 * flush-last-level-only.
3123 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3124 CPUState
*cs
= CPU(cpu
);
3125 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3127 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S1E2
);
3130 static void tlbi_aa64_vae3_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3133 /* Invalidate by VA, EL3
3134 * Currently handles both VAE3 and VALE3, since we don't support
3135 * flush-last-level-only.
3137 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3138 CPUState
*cs
= CPU(cpu
);
3139 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3141 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S1E3
);
3144 static void tlbi_aa64_vae1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3147 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3148 CPUState
*cs
= CPU(cpu
);
3149 bool sec
= arm_is_secure_below_el3(env
);
3150 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3153 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3154 ARMMMUIdxBit_S1SE1
|
3155 ARMMMUIdxBit_S1SE0
);
3157 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3158 ARMMMUIdxBit_S12NSE1
|
3159 ARMMMUIdxBit_S12NSE0
);
3163 static void tlbi_aa64_vae2is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3166 CPUState
*cs
= ENV_GET_CPU(env
);
3167 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3169 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3173 static void tlbi_aa64_vae3is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3176 CPUState
*cs
= ENV_GET_CPU(env
);
3177 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3179 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3183 static void tlbi_aa64_ipas2e1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3186 /* Invalidate by IPA. This has to invalidate any structures that
3187 * contain only stage 2 translation information, but does not need
3188 * to apply to structures that contain combined stage 1 and stage 2
3189 * translation information.
3190 * This must NOP if EL2 isn't implemented or SCR_EL3.NS is zero.
3192 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3193 CPUState
*cs
= CPU(cpu
);
3196 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
3200 pageaddr
= sextract64(value
<< 12, 0, 48);
3202 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S2NS
);
3205 static void tlbi_aa64_ipas2e1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3208 CPUState
*cs
= ENV_GET_CPU(env
);
3211 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
3215 pageaddr
= sextract64(value
<< 12, 0, 48);
3217 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3221 static CPAccessResult
aa64_zva_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3224 /* We don't implement EL2, so the only control on DC ZVA is the
3225 * bit in the SCTLR which can prohibit access for EL0.
3227 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_DZE
)) {
3228 return CP_ACCESS_TRAP
;
3230 return CP_ACCESS_OK
;
3233 static uint64_t aa64_dczid_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3235 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3236 int dzp_bit
= 1 << 4;
3238 /* DZP indicates whether DC ZVA access is allowed */
3239 if (aa64_zva_access(env
, NULL
, false) == CP_ACCESS_OK
) {
3242 return cpu
->dcz_blocksize
| dzp_bit
;
3245 static CPAccessResult
sp_el0_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3248 if (!(env
->pstate
& PSTATE_SP
)) {
3249 /* Access to SP_EL0 is undefined if it's being used as
3250 * the stack pointer.
3252 return CP_ACCESS_TRAP_UNCATEGORIZED
;
3254 return CP_ACCESS_OK
;
3257 static uint64_t spsel_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3259 return env
->pstate
& PSTATE_SP
;
3262 static void spsel_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t val
)
3264 update_spsel(env
, val
);
3267 static void sctlr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3270 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3272 if (raw_read(env
, ri
) == value
) {
3273 /* Skip the TLB flush if nothing actually changed; Linux likes
3274 * to do a lot of pointless SCTLR writes.
3279 if (arm_feature(env
, ARM_FEATURE_PMSA
) && !cpu
->has_mpu
) {
3280 /* M bit is RAZ/WI for PMSA with no MPU implemented */
3284 raw_write(env
, ri
, value
);
3285 /* ??? Lots of these bits are not implemented. */
3286 /* This may enable/disable the MMU, so do a TLB flush. */
3287 tlb_flush(CPU(cpu
));
3290 static CPAccessResult
fpexc32_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3293 if ((env
->cp15
.cptr_el
[2] & CPTR_TFP
) && arm_current_el(env
) == 2) {
3294 return CP_ACCESS_TRAP_FP_EL2
;
3296 if (env
->cp15
.cptr_el
[3] & CPTR_TFP
) {
3297 return CP_ACCESS_TRAP_FP_EL3
;
3299 return CP_ACCESS_OK
;
3302 static void sdcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3305 env
->cp15
.mdcr_el3
= value
& SDCR_VALID_MASK
;
3308 static const ARMCPRegInfo v8_cp_reginfo
[] = {
3309 /* Minimal set of EL0-visible registers. This will need to be expanded
3310 * significantly for system emulation of AArch64 CPUs.
3312 { .name
= "NZCV", .state
= ARM_CP_STATE_AA64
,
3313 .opc0
= 3, .opc1
= 3, .opc2
= 0, .crn
= 4, .crm
= 2,
3314 .access
= PL0_RW
, .type
= ARM_CP_NZCV
},
3315 { .name
= "DAIF", .state
= ARM_CP_STATE_AA64
,
3316 .opc0
= 3, .opc1
= 3, .opc2
= 1, .crn
= 4, .crm
= 2,
3317 .type
= ARM_CP_NO_RAW
,
3318 .access
= PL0_RW
, .accessfn
= aa64_daif_access
,
3319 .fieldoffset
= offsetof(CPUARMState
, daif
),
3320 .writefn
= aa64_daif_write
, .resetfn
= arm_cp_reset_ignore
},
3321 { .name
= "FPCR", .state
= ARM_CP_STATE_AA64
,
3322 .opc0
= 3, .opc1
= 3, .opc2
= 0, .crn
= 4, .crm
= 4,
3323 .access
= PL0_RW
, .readfn
= aa64_fpcr_read
, .writefn
= aa64_fpcr_write
},
3324 { .name
= "FPSR", .state
= ARM_CP_STATE_AA64
,
3325 .opc0
= 3, .opc1
= 3, .opc2
= 1, .crn
= 4, .crm
= 4,
3326 .access
= PL0_RW
, .readfn
= aa64_fpsr_read
, .writefn
= aa64_fpsr_write
},
3327 { .name
= "DCZID_EL0", .state
= ARM_CP_STATE_AA64
,
3328 .opc0
= 3, .opc1
= 3, .opc2
= 7, .crn
= 0, .crm
= 0,
3329 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
,
3330 .readfn
= aa64_dczid_read
},
3331 { .name
= "DC_ZVA", .state
= ARM_CP_STATE_AA64
,
3332 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 4, .opc2
= 1,
3333 .access
= PL0_W
, .type
= ARM_CP_DC_ZVA
,
3334 #ifndef CONFIG_USER_ONLY
3335 /* Avoid overhead of an access check that always passes in user-mode */
3336 .accessfn
= aa64_zva_access
,
3339 { .name
= "CURRENTEL", .state
= ARM_CP_STATE_AA64
,
3340 .opc0
= 3, .opc1
= 0, .opc2
= 2, .crn
= 4, .crm
= 2,
3341 .access
= PL1_R
, .type
= ARM_CP_CURRENTEL
},
3342 /* Cache ops: all NOPs since we don't emulate caches */
3343 { .name
= "IC_IALLUIS", .state
= ARM_CP_STATE_AA64
,
3344 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 1, .opc2
= 0,
3345 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3346 { .name
= "IC_IALLU", .state
= ARM_CP_STATE_AA64
,
3347 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 0,
3348 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3349 { .name
= "IC_IVAU", .state
= ARM_CP_STATE_AA64
,
3350 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 5, .opc2
= 1,
3351 .access
= PL0_W
, .type
= ARM_CP_NOP
,
3352 .accessfn
= aa64_cacheop_access
},
3353 { .name
= "DC_IVAC", .state
= ARM_CP_STATE_AA64
,
3354 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 1,
3355 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3356 { .name
= "DC_ISW", .state
= ARM_CP_STATE_AA64
,
3357 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 2,
3358 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3359 { .name
= "DC_CVAC", .state
= ARM_CP_STATE_AA64
,
3360 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 10, .opc2
= 1,
3361 .access
= PL0_W
, .type
= ARM_CP_NOP
,
3362 .accessfn
= aa64_cacheop_access
},
3363 { .name
= "DC_CSW", .state
= ARM_CP_STATE_AA64
,
3364 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 10, .opc2
= 2,
3365 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3366 { .name
= "DC_CVAU", .state
= ARM_CP_STATE_AA64
,
3367 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 11, .opc2
= 1,
3368 .access
= PL0_W
, .type
= ARM_CP_NOP
,
3369 .accessfn
= aa64_cacheop_access
},
3370 { .name
= "DC_CIVAC", .state
= ARM_CP_STATE_AA64
,
3371 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 14, .opc2
= 1,
3372 .access
= PL0_W
, .type
= ARM_CP_NOP
,
3373 .accessfn
= aa64_cacheop_access
},
3374 { .name
= "DC_CISW", .state
= ARM_CP_STATE_AA64
,
3375 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 14, .opc2
= 2,
3376 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3377 /* TLBI operations */
3378 { .name
= "TLBI_VMALLE1IS", .state
= ARM_CP_STATE_AA64
,
3379 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 0,
3380 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3381 .writefn
= tlbi_aa64_vmalle1is_write
},
3382 { .name
= "TLBI_VAE1IS", .state
= ARM_CP_STATE_AA64
,
3383 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 1,
3384 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3385 .writefn
= tlbi_aa64_vae1is_write
},
3386 { .name
= "TLBI_ASIDE1IS", .state
= ARM_CP_STATE_AA64
,
3387 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 2,
3388 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3389 .writefn
= tlbi_aa64_vmalle1is_write
},
3390 { .name
= "TLBI_VAAE1IS", .state
= ARM_CP_STATE_AA64
,
3391 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 3,
3392 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3393 .writefn
= tlbi_aa64_vae1is_write
},
3394 { .name
= "TLBI_VALE1IS", .state
= ARM_CP_STATE_AA64
,
3395 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 5,
3396 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3397 .writefn
= tlbi_aa64_vae1is_write
},
3398 { .name
= "TLBI_VAALE1IS", .state
= ARM_CP_STATE_AA64
,
3399 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 7,
3400 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3401 .writefn
= tlbi_aa64_vae1is_write
},
3402 { .name
= "TLBI_VMALLE1", .state
= ARM_CP_STATE_AA64
,
3403 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 0,
3404 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3405 .writefn
= tlbi_aa64_vmalle1_write
},
3406 { .name
= "TLBI_VAE1", .state
= ARM_CP_STATE_AA64
,
3407 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 1,
3408 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3409 .writefn
= tlbi_aa64_vae1_write
},
3410 { .name
= "TLBI_ASIDE1", .state
= ARM_CP_STATE_AA64
,
3411 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 2,
3412 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3413 .writefn
= tlbi_aa64_vmalle1_write
},
3414 { .name
= "TLBI_VAAE1", .state
= ARM_CP_STATE_AA64
,
3415 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 3,
3416 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3417 .writefn
= tlbi_aa64_vae1_write
},
3418 { .name
= "TLBI_VALE1", .state
= ARM_CP_STATE_AA64
,
3419 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 5,
3420 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3421 .writefn
= tlbi_aa64_vae1_write
},
3422 { .name
= "TLBI_VAALE1", .state
= ARM_CP_STATE_AA64
,
3423 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 7,
3424 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3425 .writefn
= tlbi_aa64_vae1_write
},
3426 { .name
= "TLBI_IPAS2E1IS", .state
= ARM_CP_STATE_AA64
,
3427 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 1,
3428 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3429 .writefn
= tlbi_aa64_ipas2e1is_write
},
3430 { .name
= "TLBI_IPAS2LE1IS", .state
= ARM_CP_STATE_AA64
,
3431 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 5,
3432 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3433 .writefn
= tlbi_aa64_ipas2e1is_write
},
3434 { .name
= "TLBI_ALLE1IS", .state
= ARM_CP_STATE_AA64
,
3435 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 4,
3436 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3437 .writefn
= tlbi_aa64_alle1is_write
},
3438 { .name
= "TLBI_VMALLS12E1IS", .state
= ARM_CP_STATE_AA64
,
3439 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 6,
3440 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3441 .writefn
= tlbi_aa64_alle1is_write
},
3442 { .name
= "TLBI_IPAS2E1", .state
= ARM_CP_STATE_AA64
,
3443 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 1,
3444 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3445 .writefn
= tlbi_aa64_ipas2e1_write
},
3446 { .name
= "TLBI_IPAS2LE1", .state
= ARM_CP_STATE_AA64
,
3447 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 5,
3448 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3449 .writefn
= tlbi_aa64_ipas2e1_write
},
3450 { .name
= "TLBI_ALLE1", .state
= ARM_CP_STATE_AA64
,
3451 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 4,
3452 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3453 .writefn
= tlbi_aa64_alle1_write
},
3454 { .name
= "TLBI_VMALLS12E1", .state
= ARM_CP_STATE_AA64
,
3455 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 6,
3456 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3457 .writefn
= tlbi_aa64_alle1is_write
},
3458 #ifndef CONFIG_USER_ONLY
3459 /* 64 bit address translation operations */
3460 { .name
= "AT_S1E1R", .state
= ARM_CP_STATE_AA64
,
3461 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 0,
3462 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3463 { .name
= "AT_S1E1W", .state
= ARM_CP_STATE_AA64
,
3464 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 1,
3465 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3466 { .name
= "AT_S1E0R", .state
= ARM_CP_STATE_AA64
,
3467 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 2,
3468 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3469 { .name
= "AT_S1E0W", .state
= ARM_CP_STATE_AA64
,
3470 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 3,
3471 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3472 { .name
= "AT_S12E1R", .state
= ARM_CP_STATE_AA64
,
3473 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 4,
3474 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3475 { .name
= "AT_S12E1W", .state
= ARM_CP_STATE_AA64
,
3476 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 5,
3477 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3478 { .name
= "AT_S12E0R", .state
= ARM_CP_STATE_AA64
,
3479 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 6,
3480 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3481 { .name
= "AT_S12E0W", .state
= ARM_CP_STATE_AA64
,
3482 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 7,
3483 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3484 /* AT S1E2* are elsewhere as they UNDEF from EL3 if EL2 is not present */
3485 { .name
= "AT_S1E3R", .state
= ARM_CP_STATE_AA64
,
3486 .opc0
= 1, .opc1
= 6, .crn
= 7, .crm
= 8, .opc2
= 0,
3487 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3488 { .name
= "AT_S1E3W", .state
= ARM_CP_STATE_AA64
,
3489 .opc0
= 1, .opc1
= 6, .crn
= 7, .crm
= 8, .opc2
= 1,
3490 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3491 { .name
= "PAR_EL1", .state
= ARM_CP_STATE_AA64
,
3492 .type
= ARM_CP_ALIAS
,
3493 .opc0
= 3, .opc1
= 0, .crn
= 7, .crm
= 4, .opc2
= 0,
3494 .access
= PL1_RW
, .resetvalue
= 0,
3495 .fieldoffset
= offsetof(CPUARMState
, cp15
.par_el
[1]),
3496 .writefn
= par_write
},
3498 /* TLB invalidate last level of translation table walk */
3499 { .name
= "TLBIMVALIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 5,
3500 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_is_write
},
3501 { .name
= "TLBIMVAALIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 7,
3502 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
,
3503 .writefn
= tlbimvaa_is_write
},
3504 { .name
= "TLBIMVAL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 5,
3505 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
3506 { .name
= "TLBIMVAAL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 7,
3507 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimvaa_write
},
3508 { .name
= "TLBIMVALH", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 5,
3509 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3510 .writefn
= tlbimva_hyp_write
},
3511 { .name
= "TLBIMVALHIS",
3512 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 5,
3513 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3514 .writefn
= tlbimva_hyp_is_write
},
3515 { .name
= "TLBIIPAS2",
3516 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 1,
3517 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3518 .writefn
= tlbiipas2_write
},
3519 { .name
= "TLBIIPAS2IS",
3520 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 1,
3521 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3522 .writefn
= tlbiipas2_is_write
},
3523 { .name
= "TLBIIPAS2L",
3524 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 5,
3525 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3526 .writefn
= tlbiipas2_write
},
3527 { .name
= "TLBIIPAS2LIS",
3528 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 5,
3529 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3530 .writefn
= tlbiipas2_is_write
},
3531 /* 32 bit cache operations */
3532 { .name
= "ICIALLUIS", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 1, .opc2
= 0,
3533 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3534 { .name
= "BPIALLUIS", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 1, .opc2
= 6,
3535 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3536 { .name
= "ICIALLU", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 0,
3537 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3538 { .name
= "ICIMVAU", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 1,
3539 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3540 { .name
= "BPIALL", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 6,
3541 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3542 { .name
= "BPIMVA", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 7,
3543 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3544 { .name
= "DCIMVAC", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 1,
3545 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3546 { .name
= "DCISW", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 2,
3547 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3548 { .name
= "DCCMVAC", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 10, .opc2
= 1,
3549 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3550 { .name
= "DCCSW", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 10, .opc2
= 2,
3551 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3552 { .name
= "DCCMVAU", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 11, .opc2
= 1,
3553 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3554 { .name
= "DCCIMVAC", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 14, .opc2
= 1,
3555 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3556 { .name
= "DCCISW", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 14, .opc2
= 2,
3557 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3558 /* MMU Domain access control / MPU write buffer control */
3559 { .name
= "DACR", .cp
= 15, .opc1
= 0, .crn
= 3, .crm
= 0, .opc2
= 0,
3560 .access
= PL1_RW
, .resetvalue
= 0,
3561 .writefn
= dacr_write
, .raw_writefn
= raw_write
,
3562 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.dacr_s
),
3563 offsetoflow32(CPUARMState
, cp15
.dacr_ns
) } },
3564 { .name
= "ELR_EL1", .state
= ARM_CP_STATE_AA64
,
3565 .type
= ARM_CP_ALIAS
,
3566 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 0, .opc2
= 1,
3568 .fieldoffset
= offsetof(CPUARMState
, elr_el
[1]) },
3569 { .name
= "SPSR_EL1", .state
= ARM_CP_STATE_AA64
,
3570 .type
= ARM_CP_ALIAS
,
3571 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 0, .opc2
= 0,
3573 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_SVC
]) },
3574 /* We rely on the access checks not allowing the guest to write to the
3575 * state field when SPSel indicates that it's being used as the stack
3578 { .name
= "SP_EL0", .state
= ARM_CP_STATE_AA64
,
3579 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 1, .opc2
= 0,
3580 .access
= PL1_RW
, .accessfn
= sp_el0_access
,
3581 .type
= ARM_CP_ALIAS
,
3582 .fieldoffset
= offsetof(CPUARMState
, sp_el
[0]) },
3583 { .name
= "SP_EL1", .state
= ARM_CP_STATE_AA64
,
3584 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 1, .opc2
= 0,
3585 .access
= PL2_RW
, .type
= ARM_CP_ALIAS
,
3586 .fieldoffset
= offsetof(CPUARMState
, sp_el
[1]) },
3587 { .name
= "SPSel", .state
= ARM_CP_STATE_AA64
,
3588 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 2, .opc2
= 0,
3589 .type
= ARM_CP_NO_RAW
,
3590 .access
= PL1_RW
, .readfn
= spsel_read
, .writefn
= spsel_write
},
3591 { .name
= "FPEXC32_EL2", .state
= ARM_CP_STATE_AA64
,
3592 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 3, .opc2
= 0,
3593 .type
= ARM_CP_ALIAS
,
3594 .fieldoffset
= offsetof(CPUARMState
, vfp
.xregs
[ARM_VFP_FPEXC
]),
3595 .access
= PL2_RW
, .accessfn
= fpexc32_access
},
3596 { .name
= "DACR32_EL2", .state
= ARM_CP_STATE_AA64
,
3597 .opc0
= 3, .opc1
= 4, .crn
= 3, .crm
= 0, .opc2
= 0,
3598 .access
= PL2_RW
, .resetvalue
= 0,
3599 .writefn
= dacr_write
, .raw_writefn
= raw_write
,
3600 .fieldoffset
= offsetof(CPUARMState
, cp15
.dacr32_el2
) },
3601 { .name
= "IFSR32_EL2", .state
= ARM_CP_STATE_AA64
,
3602 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 0, .opc2
= 1,
3603 .access
= PL2_RW
, .resetvalue
= 0,
3604 .fieldoffset
= offsetof(CPUARMState
, cp15
.ifsr32_el2
) },
3605 { .name
= "SPSR_IRQ", .state
= ARM_CP_STATE_AA64
,
3606 .type
= ARM_CP_ALIAS
,
3607 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 0,
3609 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_IRQ
]) },
3610 { .name
= "SPSR_ABT", .state
= ARM_CP_STATE_AA64
,
3611 .type
= ARM_CP_ALIAS
,
3612 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 1,
3614 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_ABT
]) },
3615 { .name
= "SPSR_UND", .state
= ARM_CP_STATE_AA64
,
3616 .type
= ARM_CP_ALIAS
,
3617 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 2,
3619 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_UND
]) },
3620 { .name
= "SPSR_FIQ", .state
= ARM_CP_STATE_AA64
,
3621 .type
= ARM_CP_ALIAS
,
3622 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 3,
3624 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_FIQ
]) },
3625 { .name
= "MDCR_EL3", .state
= ARM_CP_STATE_AA64
,
3626 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 3, .opc2
= 1,
3628 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mdcr_el3
) },
3629 { .name
= "SDCR", .type
= ARM_CP_ALIAS
,
3630 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 3, .opc2
= 1,
3631 .access
= PL1_RW
, .accessfn
= access_trap_aa32s_el1
,
3632 .writefn
= sdcr_write
,
3633 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.mdcr_el3
) },
3637 /* Used to describe the behaviour of EL2 regs when EL2 does not exist. */
3638 static const ARMCPRegInfo el3_no_el2_cp_reginfo
[] = {
3639 { .name
= "VBAR_EL2", .state
= ARM_CP_STATE_AA64
,
3640 .opc0
= 3, .opc1
= 4, .crn
= 12, .crm
= 0, .opc2
= 0,
3642 .readfn
= arm_cp_read_zero
, .writefn
= arm_cp_write_ignore
},
3643 { .name
= "HCR_EL2", .state
= ARM_CP_STATE_AA64
,
3644 .type
= ARM_CP_NO_RAW
,
3645 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 0,
3647 .readfn
= arm_cp_read_zero
, .writefn
= arm_cp_write_ignore
},
3648 { .name
= "CPTR_EL2", .state
= ARM_CP_STATE_BOTH
,
3649 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 2,
3650 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3651 { .name
= "MAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
3652 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 0,
3653 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3655 { .name
= "HMAIR1", .state
= ARM_CP_STATE_AA32
,
3656 .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 1,
3657 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3658 { .name
= "AMAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
3659 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 0,
3660 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3662 { .name
= "HMAIR1", .state
= ARM_CP_STATE_AA32
,
3663 .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 1,
3664 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3666 { .name
= "AFSR0_EL2", .state
= ARM_CP_STATE_BOTH
,
3667 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 0,
3668 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3670 { .name
= "AFSR1_EL2", .state
= ARM_CP_STATE_BOTH
,
3671 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 1,
3672 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3674 { .name
= "TCR_EL2", .state
= ARM_CP_STATE_BOTH
,
3675 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 2,
3676 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3677 { .name
= "VTCR_EL2", .state
= ARM_CP_STATE_BOTH
,
3678 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 2,
3679 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
3680 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3681 { .name
= "VTTBR", .state
= ARM_CP_STATE_AA32
,
3682 .cp
= 15, .opc1
= 6, .crm
= 2,
3683 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
3684 .type
= ARM_CP_CONST
| ARM_CP_64BIT
, .resetvalue
= 0 },
3685 { .name
= "VTTBR_EL2", .state
= ARM_CP_STATE_AA64
,
3686 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 0,
3687 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3688 { .name
= "SCTLR_EL2", .state
= ARM_CP_STATE_BOTH
,
3689 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 0, .opc2
= 0,
3690 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3691 { .name
= "TPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
3692 .opc0
= 3, .opc1
= 4, .crn
= 13, .crm
= 0, .opc2
= 2,
3693 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3694 { .name
= "TTBR0_EL2", .state
= ARM_CP_STATE_AA64
,
3695 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 0,
3696 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3697 { .name
= "HTTBR", .cp
= 15, .opc1
= 4, .crm
= 2,
3698 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_CONST
,
3700 { .name
= "CNTHCTL_EL2", .state
= ARM_CP_STATE_BOTH
,
3701 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 1, .opc2
= 0,
3702 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3703 { .name
= "CNTVOFF_EL2", .state
= ARM_CP_STATE_AA64
,
3704 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 0, .opc2
= 3,
3705 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3706 { .name
= "CNTVOFF", .cp
= 15, .opc1
= 4, .crm
= 14,
3707 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_CONST
,
3709 { .name
= "CNTHP_CVAL_EL2", .state
= ARM_CP_STATE_AA64
,
3710 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 2,
3711 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3712 { .name
= "CNTHP_CVAL", .cp
= 15, .opc1
= 6, .crm
= 14,
3713 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_CONST
,
3715 { .name
= "CNTHP_TVAL_EL2", .state
= ARM_CP_STATE_BOTH
,
3716 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 0,
3717 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3718 { .name
= "CNTHP_CTL_EL2", .state
= ARM_CP_STATE_BOTH
,
3719 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 1,
3720 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3721 { .name
= "MDCR_EL2", .state
= ARM_CP_STATE_BOTH
,
3722 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 1,
3723 .access
= PL2_RW
, .accessfn
= access_tda
,
3724 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3725 { .name
= "HPFAR_EL2", .state
= ARM_CP_STATE_BOTH
,
3726 .opc0
= 3, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 4,
3727 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
3728 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3729 { .name
= "HSTR_EL2", .state
= ARM_CP_STATE_BOTH
,
3730 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 3,
3731 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3735 static void hcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
3737 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3738 uint64_t valid_mask
= HCR_MASK
;
3740 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
3741 valid_mask
&= ~HCR_HCD
;
3742 } else if (cpu
->psci_conduit
!= QEMU_PSCI_CONDUIT_SMC
) {
3743 /* Architecturally HCR.TSC is RES0 if EL3 is not implemented.
3744 * However, if we're using the SMC PSCI conduit then QEMU is
3745 * effectively acting like EL3 firmware and so the guest at
3746 * EL2 should retain the ability to prevent EL1 from being
3747 * able to make SMC calls into the ersatz firmware, so in
3748 * that case HCR.TSC should be read/write.
3750 valid_mask
&= ~HCR_TSC
;
3753 /* Clear RES0 bits. */
3754 value
&= valid_mask
;
3756 /* These bits change the MMU setup:
3757 * HCR_VM enables stage 2 translation
3758 * HCR_PTW forbids certain page-table setups
3759 * HCR_DC Disables stage1 and enables stage2 translation
3761 if ((raw_read(env
, ri
) ^ value
) & (HCR_VM
| HCR_PTW
| HCR_DC
)) {
3762 tlb_flush(CPU(cpu
));
3764 raw_write(env
, ri
, value
);
3767 static const ARMCPRegInfo el2_cp_reginfo
[] = {
3768 { .name
= "HCR_EL2", .state
= ARM_CP_STATE_AA64
,
3769 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 0,
3770 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.hcr_el2
),
3771 .writefn
= hcr_write
},
3772 { .name
= "ELR_EL2", .state
= ARM_CP_STATE_AA64
,
3773 .type
= ARM_CP_ALIAS
,
3774 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 0, .opc2
= 1,
3776 .fieldoffset
= offsetof(CPUARMState
, elr_el
[2]) },
3777 { .name
= "ESR_EL2", .state
= ARM_CP_STATE_AA64
,
3778 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 2, .opc2
= 0,
3779 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.esr_el
[2]) },
3780 { .name
= "FAR_EL2", .state
= ARM_CP_STATE_AA64
,
3781 .opc0
= 3, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 0,
3782 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.far_el
[2]) },
3783 { .name
= "SPSR_EL2", .state
= ARM_CP_STATE_AA64
,
3784 .type
= ARM_CP_ALIAS
,
3785 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 0, .opc2
= 0,
3787 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_HYP
]) },
3788 { .name
= "VBAR_EL2", .state
= ARM_CP_STATE_AA64
,
3789 .opc0
= 3, .opc1
= 4, .crn
= 12, .crm
= 0, .opc2
= 0,
3790 .access
= PL2_RW
, .writefn
= vbar_write
,
3791 .fieldoffset
= offsetof(CPUARMState
, cp15
.vbar_el
[2]),
3793 { .name
= "SP_EL2", .state
= ARM_CP_STATE_AA64
,
3794 .opc0
= 3, .opc1
= 6, .crn
= 4, .crm
= 1, .opc2
= 0,
3795 .access
= PL3_RW
, .type
= ARM_CP_ALIAS
,
3796 .fieldoffset
= offsetof(CPUARMState
, sp_el
[2]) },
3797 { .name
= "CPTR_EL2", .state
= ARM_CP_STATE_BOTH
,
3798 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 2,
3799 .access
= PL2_RW
, .accessfn
= cptr_access
, .resetvalue
= 0,
3800 .fieldoffset
= offsetof(CPUARMState
, cp15
.cptr_el
[2]) },
3801 { .name
= "MAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
3802 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 0,
3803 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mair_el
[2]),
3805 { .name
= "HMAIR1", .state
= ARM_CP_STATE_AA32
,
3806 .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 1,
3807 .access
= PL2_RW
, .type
= ARM_CP_ALIAS
,
3808 .fieldoffset
= offsetofhigh32(CPUARMState
, cp15
.mair_el
[2]) },
3809 { .name
= "AMAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
3810 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 0,
3811 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3813 /* HAMAIR1 is mapped to AMAIR_EL2[63:32] */
3814 { .name
= "HMAIR1", .state
= ARM_CP_STATE_AA32
,
3815 .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 1,
3816 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3818 { .name
= "AFSR0_EL2", .state
= ARM_CP_STATE_BOTH
,
3819 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 0,
3820 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3822 { .name
= "AFSR1_EL2", .state
= ARM_CP_STATE_BOTH
,
3823 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 1,
3824 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3826 { .name
= "TCR_EL2", .state
= ARM_CP_STATE_BOTH
,
3827 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 2,
3829 /* no .writefn needed as this can't cause an ASID change;
3830 * no .raw_writefn or .resetfn needed as we never use mask/base_mask
3832 .fieldoffset
= offsetof(CPUARMState
, cp15
.tcr_el
[2]) },
3833 { .name
= "VTCR", .state
= ARM_CP_STATE_AA32
,
3834 .cp
= 15, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 2,
3835 .type
= ARM_CP_ALIAS
,
3836 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
3837 .fieldoffset
= offsetof(CPUARMState
, cp15
.vtcr_el2
) },
3838 { .name
= "VTCR_EL2", .state
= ARM_CP_STATE_AA64
,
3839 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 2,
3841 /* no .writefn needed as this can't cause an ASID change;
3842 * no .raw_writefn or .resetfn needed as we never use mask/base_mask
3844 .fieldoffset
= offsetof(CPUARMState
, cp15
.vtcr_el2
) },
3845 { .name
= "VTTBR", .state
= ARM_CP_STATE_AA32
,
3846 .cp
= 15, .opc1
= 6, .crm
= 2,
3847 .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
3848 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
3849 .fieldoffset
= offsetof(CPUARMState
, cp15
.vttbr_el2
),
3850 .writefn
= vttbr_write
},
3851 { .name
= "VTTBR_EL2", .state
= ARM_CP_STATE_AA64
,
3852 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 0,
3853 .access
= PL2_RW
, .writefn
= vttbr_write
,
3854 .fieldoffset
= offsetof(CPUARMState
, cp15
.vttbr_el2
) },
3855 { .name
= "SCTLR_EL2", .state
= ARM_CP_STATE_BOTH
,
3856 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 0, .opc2
= 0,
3857 .access
= PL2_RW
, .raw_writefn
= raw_write
, .writefn
= sctlr_write
,
3858 .fieldoffset
= offsetof(CPUARMState
, cp15
.sctlr_el
[2]) },
3859 { .name
= "TPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
3860 .opc0
= 3, .opc1
= 4, .crn
= 13, .crm
= 0, .opc2
= 2,
3861 .access
= PL2_RW
, .resetvalue
= 0,
3862 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[2]) },
3863 { .name
= "TTBR0_EL2", .state
= ARM_CP_STATE_AA64
,
3864 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 0,
3865 .access
= PL2_RW
, .resetvalue
= 0,
3866 .fieldoffset
= offsetof(CPUARMState
, cp15
.ttbr0_el
[2]) },
3867 { .name
= "HTTBR", .cp
= 15, .opc1
= 4, .crm
= 2,
3868 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
3869 .fieldoffset
= offsetof(CPUARMState
, cp15
.ttbr0_el
[2]) },
3870 { .name
= "TLBIALLNSNH",
3871 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 4,
3872 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3873 .writefn
= tlbiall_nsnh_write
},
3874 { .name
= "TLBIALLNSNHIS",
3875 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 4,
3876 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3877 .writefn
= tlbiall_nsnh_is_write
},
3878 { .name
= "TLBIALLH", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 0,
3879 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3880 .writefn
= tlbiall_hyp_write
},
3881 { .name
= "TLBIALLHIS", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 0,
3882 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3883 .writefn
= tlbiall_hyp_is_write
},
3884 { .name
= "TLBIMVAH", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 1,
3885 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3886 .writefn
= tlbimva_hyp_write
},
3887 { .name
= "TLBIMVAHIS", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 1,
3888 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3889 .writefn
= tlbimva_hyp_is_write
},
3890 { .name
= "TLBI_ALLE2", .state
= ARM_CP_STATE_AA64
,
3891 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 0,
3892 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3893 .writefn
= tlbi_aa64_alle2_write
},
3894 { .name
= "TLBI_VAE2", .state
= ARM_CP_STATE_AA64
,
3895 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 1,
3896 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3897 .writefn
= tlbi_aa64_vae2_write
},
3898 { .name
= "TLBI_VALE2", .state
= ARM_CP_STATE_AA64
,
3899 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 5,
3900 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3901 .writefn
= tlbi_aa64_vae2_write
},
3902 { .name
= "TLBI_ALLE2IS", .state
= ARM_CP_STATE_AA64
,
3903 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 0,
3904 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3905 .writefn
= tlbi_aa64_alle2is_write
},
3906 { .name
= "TLBI_VAE2IS", .state
= ARM_CP_STATE_AA64
,
3907 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 1,
3908 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3909 .writefn
= tlbi_aa64_vae2is_write
},
3910 { .name
= "TLBI_VALE2IS", .state
= ARM_CP_STATE_AA64
,
3911 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 5,
3912 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3913 .writefn
= tlbi_aa64_vae2is_write
},
3914 #ifndef CONFIG_USER_ONLY
3915 /* Unlike the other EL2-related AT operations, these must
3916 * UNDEF from EL3 if EL2 is not implemented, which is why we
3917 * define them here rather than with the rest of the AT ops.
3919 { .name
= "AT_S1E2R", .state
= ARM_CP_STATE_AA64
,
3920 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 0,
3921 .access
= PL2_W
, .accessfn
= at_s1e2_access
,
3922 .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3923 { .name
= "AT_S1E2W", .state
= ARM_CP_STATE_AA64
,
3924 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 1,
3925 .access
= PL2_W
, .accessfn
= at_s1e2_access
,
3926 .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3927 /* The AArch32 ATS1H* operations are CONSTRAINED UNPREDICTABLE
3928 * if EL2 is not implemented; we choose to UNDEF. Behaviour at EL3
3929 * with SCR.NS == 0 outside Monitor mode is UNPREDICTABLE; we choose
3930 * to behave as if SCR.NS was 1.
3932 { .name
= "ATS1HR", .cp
= 15, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 0,
3934 .writefn
= ats1h_write
, .type
= ARM_CP_NO_RAW
},
3935 { .name
= "ATS1HW", .cp
= 15, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 1,
3937 .writefn
= ats1h_write
, .type
= ARM_CP_NO_RAW
},
3938 { .name
= "CNTHCTL_EL2", .state
= ARM_CP_STATE_BOTH
,
3939 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 1, .opc2
= 0,
3940 /* ARMv7 requires bit 0 and 1 to reset to 1. ARMv8 defines the
3941 * reset values as IMPDEF. We choose to reset to 3 to comply with
3942 * both ARMv7 and ARMv8.
3944 .access
= PL2_RW
, .resetvalue
= 3,
3945 .fieldoffset
= offsetof(CPUARMState
, cp15
.cnthctl_el2
) },
3946 { .name
= "CNTVOFF_EL2", .state
= ARM_CP_STATE_AA64
,
3947 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 0, .opc2
= 3,
3948 .access
= PL2_RW
, .type
= ARM_CP_IO
, .resetvalue
= 0,
3949 .writefn
= gt_cntvoff_write
,
3950 .fieldoffset
= offsetof(CPUARMState
, cp15
.cntvoff_el2
) },
3951 { .name
= "CNTVOFF", .cp
= 15, .opc1
= 4, .crm
= 14,
3952 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
| ARM_CP_IO
,
3953 .writefn
= gt_cntvoff_write
,
3954 .fieldoffset
= offsetof(CPUARMState
, cp15
.cntvoff_el2
) },
3955 { .name
= "CNTHP_CVAL_EL2", .state
= ARM_CP_STATE_AA64
,
3956 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 2,
3957 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_HYP
].cval
),
3958 .type
= ARM_CP_IO
, .access
= PL2_RW
,
3959 .writefn
= gt_hyp_cval_write
, .raw_writefn
= raw_write
},
3960 { .name
= "CNTHP_CVAL", .cp
= 15, .opc1
= 6, .crm
= 14,
3961 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_HYP
].cval
),
3962 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_IO
,
3963 .writefn
= gt_hyp_cval_write
, .raw_writefn
= raw_write
},
3964 { .name
= "CNTHP_TVAL_EL2", .state
= ARM_CP_STATE_BOTH
,
3965 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 0,
3966 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL2_RW
,
3967 .resetfn
= gt_hyp_timer_reset
,
3968 .readfn
= gt_hyp_tval_read
, .writefn
= gt_hyp_tval_write
},
3969 { .name
= "CNTHP_CTL_EL2", .state
= ARM_CP_STATE_BOTH
,
3971 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 1,
3973 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_HYP
].ctl
),
3975 .writefn
= gt_hyp_ctl_write
, .raw_writefn
= raw_write
},
3977 /* The only field of MDCR_EL2 that has a defined architectural reset value
3978 * is MDCR_EL2.HPMN which should reset to the value of PMCR_EL0.N; but we
3979 * don't impelment any PMU event counters, so using zero as a reset
3980 * value for MDCR_EL2 is okay
3982 { .name
= "MDCR_EL2", .state
= ARM_CP_STATE_BOTH
,
3983 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 1,
3984 .access
= PL2_RW
, .resetvalue
= 0,
3985 .fieldoffset
= offsetof(CPUARMState
, cp15
.mdcr_el2
), },
3986 { .name
= "HPFAR", .state
= ARM_CP_STATE_AA32
,
3987 .cp
= 15, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 4,
3988 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
3989 .fieldoffset
= offsetof(CPUARMState
, cp15
.hpfar_el2
) },
3990 { .name
= "HPFAR_EL2", .state
= ARM_CP_STATE_AA64
,
3991 .opc0
= 3, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 4,
3993 .fieldoffset
= offsetof(CPUARMState
, cp15
.hpfar_el2
) },
3994 { .name
= "HSTR_EL2", .state
= ARM_CP_STATE_BOTH
,
3995 .cp
= 15, .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 3,
3997 .fieldoffset
= offsetof(CPUARMState
, cp15
.hstr_el2
) },
4001 static CPAccessResult
nsacr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4004 /* The NSACR is RW at EL3, and RO for NS EL1 and NS EL2.
4005 * At Secure EL1 it traps to EL3.
4007 if (arm_current_el(env
) == 3) {
4008 return CP_ACCESS_OK
;
4010 if (arm_is_secure_below_el3(env
)) {
4011 return CP_ACCESS_TRAP_EL3
;
4013 /* Accesses from EL1 NS and EL2 NS are UNDEF for write but allow reads. */
4015 return CP_ACCESS_OK
;
4017 return CP_ACCESS_TRAP_UNCATEGORIZED
;
4020 static const ARMCPRegInfo el3_cp_reginfo
[] = {
4021 { .name
= "SCR_EL3", .state
= ARM_CP_STATE_AA64
,
4022 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 1, .opc2
= 0,
4023 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.scr_el3
),
4024 .resetvalue
= 0, .writefn
= scr_write
},
4025 { .name
= "SCR", .type
= ARM_CP_ALIAS
,
4026 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 0,
4027 .access
= PL1_RW
, .accessfn
= access_trap_aa32s_el1
,
4028 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.scr_el3
),
4029 .writefn
= scr_write
},
4030 { .name
= "SDER32_EL3", .state
= ARM_CP_STATE_AA64
,
4031 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 1, .opc2
= 1,
4032 .access
= PL3_RW
, .resetvalue
= 0,
4033 .fieldoffset
= offsetof(CPUARMState
, cp15
.sder
) },
4035 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 1,
4036 .access
= PL3_RW
, .resetvalue
= 0,
4037 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.sder
) },
4038 { .name
= "MVBAR", .cp
= 15, .opc1
= 0, .crn
= 12, .crm
= 0, .opc2
= 1,
4039 .access
= PL1_RW
, .accessfn
= access_trap_aa32s_el1
,
4040 .writefn
= vbar_write
, .resetvalue
= 0,
4041 .fieldoffset
= offsetof(CPUARMState
, cp15
.mvbar
) },
4042 { .name
= "TTBR0_EL3", .state
= ARM_CP_STATE_AA64
,
4043 .opc0
= 3, .opc1
= 6, .crn
= 2, .crm
= 0, .opc2
= 0,
4044 .access
= PL3_RW
, .writefn
= vmsa_ttbr_write
, .resetvalue
= 0,
4045 .fieldoffset
= offsetof(CPUARMState
, cp15
.ttbr0_el
[3]) },
4046 { .name
= "TCR_EL3", .state
= ARM_CP_STATE_AA64
,
4047 .opc0
= 3, .opc1
= 6, .crn
= 2, .crm
= 0, .opc2
= 2,
4049 /* no .writefn needed as this can't cause an ASID change;
4050 * we must provide a .raw_writefn and .resetfn because we handle
4051 * reset and migration for the AArch32 TTBCR(S), which might be
4052 * using mask and base_mask.
4054 .resetfn
= vmsa_ttbcr_reset
, .raw_writefn
= vmsa_ttbcr_raw_write
,
4055 .fieldoffset
= offsetof(CPUARMState
, cp15
.tcr_el
[3]) },
4056 { .name
= "ELR_EL3", .state
= ARM_CP_STATE_AA64
,
4057 .type
= ARM_CP_ALIAS
,
4058 .opc0
= 3, .opc1
= 6, .crn
= 4, .crm
= 0, .opc2
= 1,
4060 .fieldoffset
= offsetof(CPUARMState
, elr_el
[3]) },
4061 { .name
= "ESR_EL3", .state
= ARM_CP_STATE_AA64
,
4062 .opc0
= 3, .opc1
= 6, .crn
= 5, .crm
= 2, .opc2
= 0,
4063 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.esr_el
[3]) },
4064 { .name
= "FAR_EL3", .state
= ARM_CP_STATE_AA64
,
4065 .opc0
= 3, .opc1
= 6, .crn
= 6, .crm
= 0, .opc2
= 0,
4066 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.far_el
[3]) },
4067 { .name
= "SPSR_EL3", .state
= ARM_CP_STATE_AA64
,
4068 .type
= ARM_CP_ALIAS
,
4069 .opc0
= 3, .opc1
= 6, .crn
= 4, .crm
= 0, .opc2
= 0,
4071 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_MON
]) },
4072 { .name
= "VBAR_EL3", .state
= ARM_CP_STATE_AA64
,
4073 .opc0
= 3, .opc1
= 6, .crn
= 12, .crm
= 0, .opc2
= 0,
4074 .access
= PL3_RW
, .writefn
= vbar_write
,
4075 .fieldoffset
= offsetof(CPUARMState
, cp15
.vbar_el
[3]),
4077 { .name
= "CPTR_EL3", .state
= ARM_CP_STATE_AA64
,
4078 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 1, .opc2
= 2,
4079 .access
= PL3_RW
, .accessfn
= cptr_access
, .resetvalue
= 0,
4080 .fieldoffset
= offsetof(CPUARMState
, cp15
.cptr_el
[3]) },
4081 { .name
= "TPIDR_EL3", .state
= ARM_CP_STATE_AA64
,
4082 .opc0
= 3, .opc1
= 6, .crn
= 13, .crm
= 0, .opc2
= 2,
4083 .access
= PL3_RW
, .resetvalue
= 0,
4084 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[3]) },
4085 { .name
= "AMAIR_EL3", .state
= ARM_CP_STATE_AA64
,
4086 .opc0
= 3, .opc1
= 6, .crn
= 10, .crm
= 3, .opc2
= 0,
4087 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
4089 { .name
= "AFSR0_EL3", .state
= ARM_CP_STATE_BOTH
,
4090 .opc0
= 3, .opc1
= 6, .crn
= 5, .crm
= 1, .opc2
= 0,
4091 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
4093 { .name
= "AFSR1_EL3", .state
= ARM_CP_STATE_BOTH
,
4094 .opc0
= 3, .opc1
= 6, .crn
= 5, .crm
= 1, .opc2
= 1,
4095 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
4097 { .name
= "TLBI_ALLE3IS", .state
= ARM_CP_STATE_AA64
,
4098 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 3, .opc2
= 0,
4099 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4100 .writefn
= tlbi_aa64_alle3is_write
},
4101 { .name
= "TLBI_VAE3IS", .state
= ARM_CP_STATE_AA64
,
4102 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 3, .opc2
= 1,
4103 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4104 .writefn
= tlbi_aa64_vae3is_write
},
4105 { .name
= "TLBI_VALE3IS", .state
= ARM_CP_STATE_AA64
,
4106 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 3, .opc2
= 5,
4107 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4108 .writefn
= tlbi_aa64_vae3is_write
},
4109 { .name
= "TLBI_ALLE3", .state
= ARM_CP_STATE_AA64
,
4110 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 7, .opc2
= 0,
4111 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4112 .writefn
= tlbi_aa64_alle3_write
},
4113 { .name
= "TLBI_VAE3", .state
= ARM_CP_STATE_AA64
,
4114 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 7, .opc2
= 1,
4115 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4116 .writefn
= tlbi_aa64_vae3_write
},
4117 { .name
= "TLBI_VALE3", .state
= ARM_CP_STATE_AA64
,
4118 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 7, .opc2
= 5,
4119 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4120 .writefn
= tlbi_aa64_vae3_write
},
4124 static CPAccessResult
ctr_el0_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4127 /* Only accessible in EL0 if SCTLR.UCT is set (and only in AArch64,
4128 * but the AArch32 CTR has its own reginfo struct)
4130 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_UCT
)) {
4131 return CP_ACCESS_TRAP
;
4133 return CP_ACCESS_OK
;
4136 static void oslar_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4139 /* Writes to OSLAR_EL1 may update the OS lock status, which can be
4140 * read via a bit in OSLSR_EL1.
4144 if (ri
->state
== ARM_CP_STATE_AA32
) {
4145 oslock
= (value
== 0xC5ACCE55);
4150 env
->cp15
.oslsr_el1
= deposit32(env
->cp15
.oslsr_el1
, 1, 1, oslock
);
4153 static const ARMCPRegInfo debug_cp_reginfo
[] = {
4154 /* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped
4155 * debug components. The AArch64 version of DBGDRAR is named MDRAR_EL1;
4156 * unlike DBGDRAR it is never accessible from EL0.
4157 * DBGDSAR is deprecated and must RAZ from v8 anyway, so it has no AArch64
4160 { .name
= "DBGDRAR", .cp
= 14, .crn
= 1, .crm
= 0, .opc1
= 0, .opc2
= 0,
4161 .access
= PL0_R
, .accessfn
= access_tdra
,
4162 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4163 { .name
= "MDRAR_EL1", .state
= ARM_CP_STATE_AA64
,
4164 .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 0,
4165 .access
= PL1_R
, .accessfn
= access_tdra
,
4166 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4167 { .name
= "DBGDSAR", .cp
= 14, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 0,
4168 .access
= PL0_R
, .accessfn
= access_tdra
,
4169 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4170 /* Monitor debug system control register; the 32-bit alias is DBGDSCRext. */
4171 { .name
= "MDSCR_EL1", .state
= ARM_CP_STATE_BOTH
,
4172 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 2,
4173 .access
= PL1_RW
, .accessfn
= access_tda
,
4174 .fieldoffset
= offsetof(CPUARMState
, cp15
.mdscr_el1
),
4176 /* MDCCSR_EL0, aka DBGDSCRint. This is a read-only mirror of MDSCR_EL1.
4177 * We don't implement the configurable EL0 access.
4179 { .name
= "MDCCSR_EL0", .state
= ARM_CP_STATE_BOTH
,
4180 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 0,
4181 .type
= ARM_CP_ALIAS
,
4182 .access
= PL1_R
, .accessfn
= access_tda
,
4183 .fieldoffset
= offsetof(CPUARMState
, cp15
.mdscr_el1
), },
4184 { .name
= "OSLAR_EL1", .state
= ARM_CP_STATE_BOTH
,
4185 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 4,
4186 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4187 .accessfn
= access_tdosa
,
4188 .writefn
= oslar_write
},
4189 { .name
= "OSLSR_EL1", .state
= ARM_CP_STATE_BOTH
,
4190 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 4,
4191 .access
= PL1_R
, .resetvalue
= 10,
4192 .accessfn
= access_tdosa
,
4193 .fieldoffset
= offsetof(CPUARMState
, cp15
.oslsr_el1
) },
4194 /* Dummy OSDLR_EL1: 32-bit Linux will read this */
4195 { .name
= "OSDLR_EL1", .state
= ARM_CP_STATE_BOTH
,
4196 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 3, .opc2
= 4,
4197 .access
= PL1_RW
, .accessfn
= access_tdosa
,
4198 .type
= ARM_CP_NOP
},
4199 /* Dummy DBGVCR: Linux wants to clear this on startup, but we don't
4200 * implement vector catch debug events yet.
4203 .cp
= 14, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 0,
4204 .access
= PL1_RW
, .accessfn
= access_tda
,
4205 .type
= ARM_CP_NOP
},
4206 /* Dummy DBGVCR32_EL2 (which is only for a 64-bit hypervisor
4207 * to save and restore a 32-bit guest's DBGVCR)
4209 { .name
= "DBGVCR32_EL2", .state
= ARM_CP_STATE_AA64
,
4210 .opc0
= 2, .opc1
= 4, .crn
= 0, .crm
= 7, .opc2
= 0,
4211 .access
= PL2_RW
, .accessfn
= access_tda
,
4212 .type
= ARM_CP_NOP
},
4213 /* Dummy MDCCINT_EL1, since we don't implement the Debug Communications
4214 * Channel but Linux may try to access this register. The 32-bit
4215 * alias is DBGDCCINT.
4217 { .name
= "MDCCINT_EL1", .state
= ARM_CP_STATE_BOTH
,
4218 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 0,
4219 .access
= PL1_RW
, .accessfn
= access_tda
,
4220 .type
= ARM_CP_NOP
},
4224 static const ARMCPRegInfo debug_lpae_cp_reginfo
[] = {
4225 /* 64 bit access versions of the (dummy) debug registers */
4226 { .name
= "DBGDRAR", .cp
= 14, .crm
= 1, .opc1
= 0,
4227 .access
= PL0_R
, .type
= ARM_CP_CONST
|ARM_CP_64BIT
, .resetvalue
= 0 },
4228 { .name
= "DBGDSAR", .cp
= 14, .crm
= 2, .opc1
= 0,
4229 .access
= PL0_R
, .type
= ARM_CP_CONST
|ARM_CP_64BIT
, .resetvalue
= 0 },
4233 void hw_watchpoint_update(ARMCPU
*cpu
, int n
)
4235 CPUARMState
*env
= &cpu
->env
;
4237 vaddr wvr
= env
->cp15
.dbgwvr
[n
];
4238 uint64_t wcr
= env
->cp15
.dbgwcr
[n
];
4240 int flags
= BP_CPU
| BP_STOP_BEFORE_ACCESS
;
4242 if (env
->cpu_watchpoint
[n
]) {
4243 cpu_watchpoint_remove_by_ref(CPU(cpu
), env
->cpu_watchpoint
[n
]);
4244 env
->cpu_watchpoint
[n
] = NULL
;
4247 if (!extract64(wcr
, 0, 1)) {
4248 /* E bit clear : watchpoint disabled */
4252 switch (extract64(wcr
, 3, 2)) {
4254 /* LSC 00 is reserved and must behave as if the wp is disabled */
4257 flags
|= BP_MEM_READ
;
4260 flags
|= BP_MEM_WRITE
;
4263 flags
|= BP_MEM_ACCESS
;
4267 /* Attempts to use both MASK and BAS fields simultaneously are
4268 * CONSTRAINED UNPREDICTABLE; we opt to ignore BAS in this case,
4269 * thus generating a watchpoint for every byte in the masked region.
4271 mask
= extract64(wcr
, 24, 4);
4272 if (mask
== 1 || mask
== 2) {
4273 /* Reserved values of MASK; we must act as if the mask value was
4274 * some non-reserved value, or as if the watchpoint were disabled.
4275 * We choose the latter.
4279 /* Watchpoint covers an aligned area up to 2GB in size */
4281 /* If masked bits in WVR are not zero it's CONSTRAINED UNPREDICTABLE
4282 * whether the watchpoint fires when the unmasked bits match; we opt
4283 * to generate the exceptions.
4287 /* Watchpoint covers bytes defined by the byte address select bits */
4288 int bas
= extract64(wcr
, 5, 8);
4292 /* This must act as if the watchpoint is disabled */
4296 if (extract64(wvr
, 2, 1)) {
4297 /* Deprecated case of an only 4-aligned address. BAS[7:4] are
4298 * ignored, and BAS[3:0] define which bytes to watch.
4302 /* The BAS bits are supposed to be programmed to indicate a contiguous
4303 * range of bytes. Otherwise it is CONSTRAINED UNPREDICTABLE whether
4304 * we fire for each byte in the word/doubleword addressed by the WVR.
4305 * We choose to ignore any non-zero bits after the first range of 1s.
4307 basstart
= ctz32(bas
);
4308 len
= cto32(bas
>> basstart
);
4312 cpu_watchpoint_insert(CPU(cpu
), wvr
, len
, flags
,
4313 &env
->cpu_watchpoint
[n
]);
4316 void hw_watchpoint_update_all(ARMCPU
*cpu
)
4319 CPUARMState
*env
= &cpu
->env
;
4321 /* Completely clear out existing QEMU watchpoints and our array, to
4322 * avoid possible stale entries following migration load.
4324 cpu_watchpoint_remove_all(CPU(cpu
), BP_CPU
);
4325 memset(env
->cpu_watchpoint
, 0, sizeof(env
->cpu_watchpoint
));
4327 for (i
= 0; i
< ARRAY_SIZE(cpu
->env
.cpu_watchpoint
); i
++) {
4328 hw_watchpoint_update(cpu
, i
);
4332 static void dbgwvr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4335 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4338 /* Bits [63:49] are hardwired to the value of bit [48]; that is, the
4339 * register reads and behaves as if values written are sign extended.
4340 * Bits [1:0] are RES0.
4342 value
= sextract64(value
, 0, 49) & ~3ULL;
4344 raw_write(env
, ri
, value
);
4345 hw_watchpoint_update(cpu
, i
);
4348 static void dbgwcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4351 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4354 raw_write(env
, ri
, value
);
4355 hw_watchpoint_update(cpu
, i
);
4358 void hw_breakpoint_update(ARMCPU
*cpu
, int n
)
4360 CPUARMState
*env
= &cpu
->env
;
4361 uint64_t bvr
= env
->cp15
.dbgbvr
[n
];
4362 uint64_t bcr
= env
->cp15
.dbgbcr
[n
];
4367 if (env
->cpu_breakpoint
[n
]) {
4368 cpu_breakpoint_remove_by_ref(CPU(cpu
), env
->cpu_breakpoint
[n
]);
4369 env
->cpu_breakpoint
[n
] = NULL
;
4372 if (!extract64(bcr
, 0, 1)) {
4373 /* E bit clear : watchpoint disabled */
4377 bt
= extract64(bcr
, 20, 4);
4380 case 4: /* unlinked address mismatch (reserved if AArch64) */
4381 case 5: /* linked address mismatch (reserved if AArch64) */
4382 qemu_log_mask(LOG_UNIMP
,
4383 "arm: address mismatch breakpoint types not implemented");
4385 case 0: /* unlinked address match */
4386 case 1: /* linked address match */
4388 /* Bits [63:49] are hardwired to the value of bit [48]; that is,
4389 * we behave as if the register was sign extended. Bits [1:0] are
4390 * RES0. The BAS field is used to allow setting breakpoints on 16
4391 * bit wide instructions; it is CONSTRAINED UNPREDICTABLE whether
4392 * a bp will fire if the addresses covered by the bp and the addresses
4393 * covered by the insn overlap but the insn doesn't start at the
4394 * start of the bp address range. We choose to require the insn and
4395 * the bp to have the same address. The constraints on writing to
4396 * BAS enforced in dbgbcr_write mean we have only four cases:
4397 * 0b0000 => no breakpoint
4398 * 0b0011 => breakpoint on addr
4399 * 0b1100 => breakpoint on addr + 2
4400 * 0b1111 => breakpoint on addr
4401 * See also figure D2-3 in the v8 ARM ARM (DDI0487A.c).
4403 int bas
= extract64(bcr
, 5, 4);
4404 addr
= sextract64(bvr
, 0, 49) & ~3ULL;
4413 case 2: /* unlinked context ID match */
4414 case 8: /* unlinked VMID match (reserved if no EL2) */
4415 case 10: /* unlinked context ID and VMID match (reserved if no EL2) */
4416 qemu_log_mask(LOG_UNIMP
,
4417 "arm: unlinked context breakpoint types not implemented");
4419 case 9: /* linked VMID match (reserved if no EL2) */
4420 case 11: /* linked context ID and VMID match (reserved if no EL2) */
4421 case 3: /* linked context ID match */
4423 /* We must generate no events for Linked context matches (unless
4424 * they are linked to by some other bp/wp, which is handled in
4425 * updates for the linking bp/wp). We choose to also generate no events
4426 * for reserved values.
4431 cpu_breakpoint_insert(CPU(cpu
), addr
, flags
, &env
->cpu_breakpoint
[n
]);
4434 void hw_breakpoint_update_all(ARMCPU
*cpu
)
4437 CPUARMState
*env
= &cpu
->env
;
4439 /* Completely clear out existing QEMU breakpoints and our array, to
4440 * avoid possible stale entries following migration load.
4442 cpu_breakpoint_remove_all(CPU(cpu
), BP_CPU
);
4443 memset(env
->cpu_breakpoint
, 0, sizeof(env
->cpu_breakpoint
));
4445 for (i
= 0; i
< ARRAY_SIZE(cpu
->env
.cpu_breakpoint
); i
++) {
4446 hw_breakpoint_update(cpu
, i
);
4450 static void dbgbvr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4453 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4456 raw_write(env
, ri
, value
);
4457 hw_breakpoint_update(cpu
, i
);
4460 static void dbgbcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4463 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4466 /* BAS[3] is a read-only copy of BAS[2], and BAS[1] a read-only
4469 value
= deposit64(value
, 6, 1, extract64(value
, 5, 1));
4470 value
= deposit64(value
, 8, 1, extract64(value
, 7, 1));
4472 raw_write(env
, ri
, value
);
4473 hw_breakpoint_update(cpu
, i
);
4476 static void define_debug_regs(ARMCPU
*cpu
)
4478 /* Define v7 and v8 architectural debug registers.
4479 * These are just dummy implementations for now.
4482 int wrps
, brps
, ctx_cmps
;
4483 ARMCPRegInfo dbgdidr
= {
4484 .name
= "DBGDIDR", .cp
= 14, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 0,
4485 .access
= PL0_R
, .accessfn
= access_tda
,
4486 .type
= ARM_CP_CONST
, .resetvalue
= cpu
->dbgdidr
,
4489 /* Note that all these register fields hold "number of Xs minus 1". */
4490 brps
= extract32(cpu
->dbgdidr
, 24, 4);
4491 wrps
= extract32(cpu
->dbgdidr
, 28, 4);
4492 ctx_cmps
= extract32(cpu
->dbgdidr
, 20, 4);
4494 assert(ctx_cmps
<= brps
);
4496 /* The DBGDIDR and ID_AA64DFR0_EL1 define various properties
4497 * of the debug registers such as number of breakpoints;
4498 * check that if they both exist then they agree.
4500 if (arm_feature(&cpu
->env
, ARM_FEATURE_AARCH64
)) {
4501 assert(extract32(cpu
->id_aa64dfr0
, 12, 4) == brps
);
4502 assert(extract32(cpu
->id_aa64dfr0
, 20, 4) == wrps
);
4503 assert(extract32(cpu
->id_aa64dfr0
, 28, 4) == ctx_cmps
);
4506 define_one_arm_cp_reg(cpu
, &dbgdidr
);
4507 define_arm_cp_regs(cpu
, debug_cp_reginfo
);
4509 if (arm_feature(&cpu
->env
, ARM_FEATURE_LPAE
)) {
4510 define_arm_cp_regs(cpu
, debug_lpae_cp_reginfo
);
4513 for (i
= 0; i
< brps
+ 1; i
++) {
4514 ARMCPRegInfo dbgregs
[] = {
4515 { .name
= "DBGBVR", .state
= ARM_CP_STATE_BOTH
,
4516 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 4,
4517 .access
= PL1_RW
, .accessfn
= access_tda
,
4518 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgbvr
[i
]),
4519 .writefn
= dbgbvr_write
, .raw_writefn
= raw_write
4521 { .name
= "DBGBCR", .state
= ARM_CP_STATE_BOTH
,
4522 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 5,
4523 .access
= PL1_RW
, .accessfn
= access_tda
,
4524 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgbcr
[i
]),
4525 .writefn
= dbgbcr_write
, .raw_writefn
= raw_write
4529 define_arm_cp_regs(cpu
, dbgregs
);
4532 for (i
= 0; i
< wrps
+ 1; i
++) {
4533 ARMCPRegInfo dbgregs
[] = {
4534 { .name
= "DBGWVR", .state
= ARM_CP_STATE_BOTH
,
4535 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 6,
4536 .access
= PL1_RW
, .accessfn
= access_tda
,
4537 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgwvr
[i
]),
4538 .writefn
= dbgwvr_write
, .raw_writefn
= raw_write
4540 { .name
= "DBGWCR", .state
= ARM_CP_STATE_BOTH
,
4541 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 7,
4542 .access
= PL1_RW
, .accessfn
= access_tda
,
4543 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgwcr
[i
]),
4544 .writefn
= dbgwcr_write
, .raw_writefn
= raw_write
4548 define_arm_cp_regs(cpu
, dbgregs
);
4552 /* We don't know until after realize whether there's a GICv3
4553 * attached, and that is what registers the gicv3 sysregs.
4554 * So we have to fill in the GIC fields in ID_PFR/ID_PFR1_EL1/ID_AA64PFR0_EL1
4557 static uint64_t id_pfr1_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
4559 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4560 uint64_t pfr1
= cpu
->id_pfr1
;
4562 if (env
->gicv3state
) {
4568 static uint64_t id_aa64pfr0_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
4570 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4571 uint64_t pfr0
= cpu
->id_aa64pfr0
;
4573 if (env
->gicv3state
) {
4579 void register_cp_regs_for_features(ARMCPU
*cpu
)
4581 /* Register all the coprocessor registers based on feature bits */
4582 CPUARMState
*env
= &cpu
->env
;
4583 if (arm_feature(env
, ARM_FEATURE_M
)) {
4584 /* M profile has no coprocessor registers */
4588 define_arm_cp_regs(cpu
, cp_reginfo
);
4589 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
4590 /* Must go early as it is full of wildcards that may be
4591 * overridden by later definitions.
4593 define_arm_cp_regs(cpu
, not_v8_cp_reginfo
);
4596 if (arm_feature(env
, ARM_FEATURE_V6
)) {
4597 /* The ID registers all have impdef reset values */
4598 ARMCPRegInfo v6_idregs
[] = {
4599 { .name
= "ID_PFR0", .state
= ARM_CP_STATE_BOTH
,
4600 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 0,
4601 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4602 .resetvalue
= cpu
->id_pfr0
},
4603 /* ID_PFR1 is not a plain ARM_CP_CONST because we don't know
4604 * the value of the GIC field until after we define these regs.
4606 { .name
= "ID_PFR1", .state
= ARM_CP_STATE_BOTH
,
4607 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 1,
4608 .access
= PL1_R
, .type
= ARM_CP_NO_RAW
,
4609 .readfn
= id_pfr1_read
,
4610 .writefn
= arm_cp_write_ignore
},
4611 { .name
= "ID_DFR0", .state
= ARM_CP_STATE_BOTH
,
4612 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 2,
4613 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4614 .resetvalue
= cpu
->id_dfr0
},
4615 { .name
= "ID_AFR0", .state
= ARM_CP_STATE_BOTH
,
4616 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 3,
4617 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4618 .resetvalue
= cpu
->id_afr0
},
4619 { .name
= "ID_MMFR0", .state
= ARM_CP_STATE_BOTH
,
4620 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 4,
4621 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4622 .resetvalue
= cpu
->id_mmfr0
},
4623 { .name
= "ID_MMFR1", .state
= ARM_CP_STATE_BOTH
,
4624 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 5,
4625 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4626 .resetvalue
= cpu
->id_mmfr1
},
4627 { .name
= "ID_MMFR2", .state
= ARM_CP_STATE_BOTH
,
4628 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 6,
4629 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4630 .resetvalue
= cpu
->id_mmfr2
},
4631 { .name
= "ID_MMFR3", .state
= ARM_CP_STATE_BOTH
,
4632 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 7,
4633 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4634 .resetvalue
= cpu
->id_mmfr3
},
4635 { .name
= "ID_ISAR0", .state
= ARM_CP_STATE_BOTH
,
4636 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 0,
4637 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4638 .resetvalue
= cpu
->id_isar0
},
4639 { .name
= "ID_ISAR1", .state
= ARM_CP_STATE_BOTH
,
4640 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 1,
4641 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4642 .resetvalue
= cpu
->id_isar1
},
4643 { .name
= "ID_ISAR2", .state
= ARM_CP_STATE_BOTH
,
4644 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 2,
4645 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4646 .resetvalue
= cpu
->id_isar2
},
4647 { .name
= "ID_ISAR3", .state
= ARM_CP_STATE_BOTH
,
4648 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 3,
4649 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4650 .resetvalue
= cpu
->id_isar3
},
4651 { .name
= "ID_ISAR4", .state
= ARM_CP_STATE_BOTH
,
4652 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 4,
4653 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4654 .resetvalue
= cpu
->id_isar4
},
4655 { .name
= "ID_ISAR5", .state
= ARM_CP_STATE_BOTH
,
4656 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 5,
4657 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4658 .resetvalue
= cpu
->id_isar5
},
4659 { .name
= "ID_MMFR4", .state
= ARM_CP_STATE_BOTH
,
4660 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 6,
4661 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4662 .resetvalue
= cpu
->id_mmfr4
},
4663 /* 7 is as yet unallocated and must RAZ */
4664 { .name
= "ID_ISAR7_RESERVED", .state
= ARM_CP_STATE_BOTH
,
4665 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 7,
4666 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4670 define_arm_cp_regs(cpu
, v6_idregs
);
4671 define_arm_cp_regs(cpu
, v6_cp_reginfo
);
4673 define_arm_cp_regs(cpu
, not_v6_cp_reginfo
);
4675 if (arm_feature(env
, ARM_FEATURE_V6K
)) {
4676 define_arm_cp_regs(cpu
, v6k_cp_reginfo
);
4678 if (arm_feature(env
, ARM_FEATURE_V7MP
) &&
4679 !arm_feature(env
, ARM_FEATURE_PMSA
)) {
4680 define_arm_cp_regs(cpu
, v7mp_cp_reginfo
);
4682 if (arm_feature(env
, ARM_FEATURE_V7
)) {
4683 /* v7 performance monitor control register: same implementor
4684 * field as main ID register, and we implement only the cycle
4687 #ifndef CONFIG_USER_ONLY
4688 ARMCPRegInfo pmcr
= {
4689 .name
= "PMCR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 0,
4691 .type
= ARM_CP_IO
| ARM_CP_ALIAS
,
4692 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmcr
),
4693 .accessfn
= pmreg_access
, .writefn
= pmcr_write
,
4694 .raw_writefn
= raw_write
,
4696 ARMCPRegInfo pmcr64
= {
4697 .name
= "PMCR_EL0", .state
= ARM_CP_STATE_AA64
,
4698 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 0,
4699 .access
= PL0_RW
, .accessfn
= pmreg_access
,
4701 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmcr
),
4702 .resetvalue
= cpu
->midr
& 0xff000000,
4703 .writefn
= pmcr_write
, .raw_writefn
= raw_write
,
4705 define_one_arm_cp_reg(cpu
, &pmcr
);
4706 define_one_arm_cp_reg(cpu
, &pmcr64
);
4708 ARMCPRegInfo clidr
= {
4709 .name
= "CLIDR", .state
= ARM_CP_STATE_BOTH
,
4710 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 1, .opc2
= 1,
4711 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= cpu
->clidr
4713 define_one_arm_cp_reg(cpu
, &clidr
);
4714 define_arm_cp_regs(cpu
, v7_cp_reginfo
);
4715 define_debug_regs(cpu
);
4717 define_arm_cp_regs(cpu
, not_v7_cp_reginfo
);
4719 if (arm_feature(env
, ARM_FEATURE_V8
)) {
4720 /* AArch64 ID registers, which all have impdef reset values.
4721 * Note that within the ID register ranges the unused slots
4722 * must all RAZ, not UNDEF; future architecture versions may
4723 * define new registers here.
4725 ARMCPRegInfo v8_idregs
[] = {
4726 /* ID_AA64PFR0_EL1 is not a plain ARM_CP_CONST because we don't
4727 * know the right value for the GIC field until after we
4728 * define these regs.
4730 { .name
= "ID_AA64PFR0_EL1", .state
= ARM_CP_STATE_AA64
,
4731 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 0,
4732 .access
= PL1_R
, .type
= ARM_CP_NO_RAW
,
4733 .readfn
= id_aa64pfr0_read
,
4734 .writefn
= arm_cp_write_ignore
},
4735 { .name
= "ID_AA64PFR1_EL1", .state
= ARM_CP_STATE_AA64
,
4736 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 1,
4737 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4738 .resetvalue
= cpu
->id_aa64pfr1
},
4739 { .name
= "ID_AA64PFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4740 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 2,
4741 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4743 { .name
= "ID_AA64PFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4744 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 3,
4745 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4747 { .name
= "ID_AA64PFR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4748 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 4,
4749 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4751 { .name
= "ID_AA64PFR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4752 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 5,
4753 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4755 { .name
= "ID_AA64PFR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4756 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 6,
4757 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4759 { .name
= "ID_AA64PFR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4760 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 7,
4761 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4763 { .name
= "ID_AA64DFR0_EL1", .state
= ARM_CP_STATE_AA64
,
4764 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 0,
4765 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4766 .resetvalue
= cpu
->id_aa64dfr0
},
4767 { .name
= "ID_AA64DFR1_EL1", .state
= ARM_CP_STATE_AA64
,
4768 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 1,
4769 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4770 .resetvalue
= cpu
->id_aa64dfr1
},
4771 { .name
= "ID_AA64DFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4772 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 2,
4773 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4775 { .name
= "ID_AA64DFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4776 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 3,
4777 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4779 { .name
= "ID_AA64AFR0_EL1", .state
= ARM_CP_STATE_AA64
,
4780 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 4,
4781 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4782 .resetvalue
= cpu
->id_aa64afr0
},
4783 { .name
= "ID_AA64AFR1_EL1", .state
= ARM_CP_STATE_AA64
,
4784 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 5,
4785 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4786 .resetvalue
= cpu
->id_aa64afr1
},
4787 { .name
= "ID_AA64AFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4788 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 6,
4789 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4791 { .name
= "ID_AA64AFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4792 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 7,
4793 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4795 { .name
= "ID_AA64ISAR0_EL1", .state
= ARM_CP_STATE_AA64
,
4796 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 0,
4797 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4798 .resetvalue
= cpu
->id_aa64isar0
},
4799 { .name
= "ID_AA64ISAR1_EL1", .state
= ARM_CP_STATE_AA64
,
4800 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 1,
4801 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4802 .resetvalue
= cpu
->id_aa64isar1
},
4803 { .name
= "ID_AA64ISAR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4804 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 2,
4805 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4807 { .name
= "ID_AA64ISAR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4808 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 3,
4809 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4811 { .name
= "ID_AA64ISAR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4812 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 4,
4813 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4815 { .name
= "ID_AA64ISAR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4816 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 5,
4817 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4819 { .name
= "ID_AA64ISAR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4820 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 6,
4821 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4823 { .name
= "ID_AA64ISAR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4824 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 7,
4825 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4827 { .name
= "ID_AA64MMFR0_EL1", .state
= ARM_CP_STATE_AA64
,
4828 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 0,
4829 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4830 .resetvalue
= cpu
->id_aa64mmfr0
},
4831 { .name
= "ID_AA64MMFR1_EL1", .state
= ARM_CP_STATE_AA64
,
4832 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 1,
4833 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4834 .resetvalue
= cpu
->id_aa64mmfr1
},
4835 { .name
= "ID_AA64MMFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4836 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 2,
4837 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4839 { .name
= "ID_AA64MMFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4840 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 3,
4841 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4843 { .name
= "ID_AA64MMFR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4844 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 4,
4845 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4847 { .name
= "ID_AA64MMFR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4848 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 5,
4849 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4851 { .name
= "ID_AA64MMFR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4852 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 6,
4853 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4855 { .name
= "ID_AA64MMFR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4856 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 7,
4857 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4859 { .name
= "MVFR0_EL1", .state
= ARM_CP_STATE_AA64
,
4860 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 0,
4861 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4862 .resetvalue
= cpu
->mvfr0
},
4863 { .name
= "MVFR1_EL1", .state
= ARM_CP_STATE_AA64
,
4864 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 1,
4865 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4866 .resetvalue
= cpu
->mvfr1
},
4867 { .name
= "MVFR2_EL1", .state
= ARM_CP_STATE_AA64
,
4868 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 2,
4869 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4870 .resetvalue
= cpu
->mvfr2
},
4871 { .name
= "MVFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4872 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 3,
4873 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4875 { .name
= "MVFR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4876 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 4,
4877 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4879 { .name
= "MVFR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4880 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 5,
4881 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4883 { .name
= "MVFR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4884 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 6,
4885 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4887 { .name
= "MVFR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4888 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 7,
4889 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4891 { .name
= "PMCEID0", .state
= ARM_CP_STATE_AA32
,
4892 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 12, .opc2
= 6,
4893 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
4894 .resetvalue
= cpu
->pmceid0
},
4895 { .name
= "PMCEID0_EL0", .state
= ARM_CP_STATE_AA64
,
4896 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 6,
4897 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
4898 .resetvalue
= cpu
->pmceid0
},
4899 { .name
= "PMCEID1", .state
= ARM_CP_STATE_AA32
,
4900 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 12, .opc2
= 7,
4901 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
4902 .resetvalue
= cpu
->pmceid1
},
4903 { .name
= "PMCEID1_EL0", .state
= ARM_CP_STATE_AA64
,
4904 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 7,
4905 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
4906 .resetvalue
= cpu
->pmceid1
},
4909 /* RVBAR_EL1 is only implemented if EL1 is the highest EL */
4910 if (!arm_feature(env
, ARM_FEATURE_EL3
) &&
4911 !arm_feature(env
, ARM_FEATURE_EL2
)) {
4912 ARMCPRegInfo rvbar
= {
4913 .name
= "RVBAR_EL1", .state
= ARM_CP_STATE_AA64
,
4914 .opc0
= 3, .opc1
= 0, .crn
= 12, .crm
= 0, .opc2
= 1,
4915 .type
= ARM_CP_CONST
, .access
= PL1_R
, .resetvalue
= cpu
->rvbar
4917 define_one_arm_cp_reg(cpu
, &rvbar
);
4919 define_arm_cp_regs(cpu
, v8_idregs
);
4920 define_arm_cp_regs(cpu
, v8_cp_reginfo
);
4922 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
4923 uint64_t vmpidr_def
= mpidr_read_val(env
);
4924 ARMCPRegInfo vpidr_regs
[] = {
4925 { .name
= "VPIDR", .state
= ARM_CP_STATE_AA32
,
4926 .cp
= 15, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 0,
4927 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
4928 .resetvalue
= cpu
->midr
,
4929 .fieldoffset
= offsetof(CPUARMState
, cp15
.vpidr_el2
) },
4930 { .name
= "VPIDR_EL2", .state
= ARM_CP_STATE_AA64
,
4931 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 0,
4932 .access
= PL2_RW
, .resetvalue
= cpu
->midr
,
4933 .fieldoffset
= offsetof(CPUARMState
, cp15
.vpidr_el2
) },
4934 { .name
= "VMPIDR", .state
= ARM_CP_STATE_AA32
,
4935 .cp
= 15, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 5,
4936 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
4937 .resetvalue
= vmpidr_def
,
4938 .fieldoffset
= offsetof(CPUARMState
, cp15
.vmpidr_el2
) },
4939 { .name
= "VMPIDR_EL2", .state
= ARM_CP_STATE_AA64
,
4940 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 5,
4942 .resetvalue
= vmpidr_def
,
4943 .fieldoffset
= offsetof(CPUARMState
, cp15
.vmpidr_el2
) },
4946 define_arm_cp_regs(cpu
, vpidr_regs
);
4947 define_arm_cp_regs(cpu
, el2_cp_reginfo
);
4948 /* RVBAR_EL2 is only implemented if EL2 is the highest EL */
4949 if (!arm_feature(env
, ARM_FEATURE_EL3
)) {
4950 ARMCPRegInfo rvbar
= {
4951 .name
= "RVBAR_EL2", .state
= ARM_CP_STATE_AA64
,
4952 .opc0
= 3, .opc1
= 4, .crn
= 12, .crm
= 0, .opc2
= 1,
4953 .type
= ARM_CP_CONST
, .access
= PL2_R
, .resetvalue
= cpu
->rvbar
4955 define_one_arm_cp_reg(cpu
, &rvbar
);
4958 /* If EL2 is missing but higher ELs are enabled, we need to
4959 * register the no_el2 reginfos.
4961 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
4962 /* When EL3 exists but not EL2, VPIDR and VMPIDR take the value
4963 * of MIDR_EL1 and MPIDR_EL1.
4965 ARMCPRegInfo vpidr_regs
[] = {
4966 { .name
= "VPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
4967 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 0,
4968 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
4969 .type
= ARM_CP_CONST
, .resetvalue
= cpu
->midr
,
4970 .fieldoffset
= offsetof(CPUARMState
, cp15
.vpidr_el2
) },
4971 { .name
= "VMPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
4972 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 5,
4973 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
4974 .type
= ARM_CP_NO_RAW
,
4975 .writefn
= arm_cp_write_ignore
, .readfn
= mpidr_read
},
4978 define_arm_cp_regs(cpu
, vpidr_regs
);
4979 define_arm_cp_regs(cpu
, el3_no_el2_cp_reginfo
);
4982 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
4983 define_arm_cp_regs(cpu
, el3_cp_reginfo
);
4984 ARMCPRegInfo el3_regs
[] = {
4985 { .name
= "RVBAR_EL3", .state
= ARM_CP_STATE_AA64
,
4986 .opc0
= 3, .opc1
= 6, .crn
= 12, .crm
= 0, .opc2
= 1,
4987 .type
= ARM_CP_CONST
, .access
= PL3_R
, .resetvalue
= cpu
->rvbar
},
4988 { .name
= "SCTLR_EL3", .state
= ARM_CP_STATE_AA64
,
4989 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 0, .opc2
= 0,
4991 .raw_writefn
= raw_write
, .writefn
= sctlr_write
,
4992 .fieldoffset
= offsetof(CPUARMState
, cp15
.sctlr_el
[3]),
4993 .resetvalue
= cpu
->reset_sctlr
},
4997 define_arm_cp_regs(cpu
, el3_regs
);
4999 /* The behaviour of NSACR is sufficiently various that we don't
5000 * try to describe it in a single reginfo:
5001 * if EL3 is 64 bit, then trap to EL3 from S EL1,
5002 * reads as constant 0xc00 from NS EL1 and NS EL2
5003 * if EL3 is 32 bit, then RW at EL3, RO at NS EL1 and NS EL2
5004 * if v7 without EL3, register doesn't exist
5005 * if v8 without EL3, reads as constant 0xc00 from NS EL1 and NS EL2
5007 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
5008 if (arm_feature(env
, ARM_FEATURE_AARCH64
)) {
5009 ARMCPRegInfo nsacr
= {
5010 .name
= "NSACR", .type
= ARM_CP_CONST
,
5011 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 2,
5012 .access
= PL1_RW
, .accessfn
= nsacr_access
,
5015 define_one_arm_cp_reg(cpu
, &nsacr
);
5017 ARMCPRegInfo nsacr
= {
5019 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 2,
5020 .access
= PL3_RW
| PL1_R
,
5022 .fieldoffset
= offsetof(CPUARMState
, cp15
.nsacr
)
5024 define_one_arm_cp_reg(cpu
, &nsacr
);
5027 if (arm_feature(env
, ARM_FEATURE_V8
)) {
5028 ARMCPRegInfo nsacr
= {
5029 .name
= "NSACR", .type
= ARM_CP_CONST
,
5030 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 2,
5034 define_one_arm_cp_reg(cpu
, &nsacr
);
5038 if (arm_feature(env
, ARM_FEATURE_PMSA
)) {
5039 if (arm_feature(env
, ARM_FEATURE_V6
)) {
5040 /* PMSAv6 not implemented */
5041 assert(arm_feature(env
, ARM_FEATURE_V7
));
5042 define_arm_cp_regs(cpu
, vmsa_pmsa_cp_reginfo
);
5043 define_arm_cp_regs(cpu
, pmsav7_cp_reginfo
);
5045 define_arm_cp_regs(cpu
, pmsav5_cp_reginfo
);
5048 define_arm_cp_regs(cpu
, vmsa_pmsa_cp_reginfo
);
5049 define_arm_cp_regs(cpu
, vmsa_cp_reginfo
);
5051 if (arm_feature(env
, ARM_FEATURE_THUMB2EE
)) {
5052 define_arm_cp_regs(cpu
, t2ee_cp_reginfo
);
5054 if (arm_feature(env
, ARM_FEATURE_GENERIC_TIMER
)) {
5055 define_arm_cp_regs(cpu
, generic_timer_cp_reginfo
);
5057 if (arm_feature(env
, ARM_FEATURE_VAPA
)) {
5058 define_arm_cp_regs(cpu
, vapa_cp_reginfo
);
5060 if (arm_feature(env
, ARM_FEATURE_CACHE_TEST_CLEAN
)) {
5061 define_arm_cp_regs(cpu
, cache_test_clean_cp_reginfo
);
5063 if (arm_feature(env
, ARM_FEATURE_CACHE_DIRTY_REG
)) {
5064 define_arm_cp_regs(cpu
, cache_dirty_status_cp_reginfo
);
5066 if (arm_feature(env
, ARM_FEATURE_CACHE_BLOCK_OPS
)) {
5067 define_arm_cp_regs(cpu
, cache_block_ops_cp_reginfo
);
5069 if (arm_feature(env
, ARM_FEATURE_OMAPCP
)) {
5070 define_arm_cp_regs(cpu
, omap_cp_reginfo
);
5072 if (arm_feature(env
, ARM_FEATURE_STRONGARM
)) {
5073 define_arm_cp_regs(cpu
, strongarm_cp_reginfo
);
5075 if (arm_feature(env
, ARM_FEATURE_XSCALE
)) {
5076 define_arm_cp_regs(cpu
, xscale_cp_reginfo
);
5078 if (arm_feature(env
, ARM_FEATURE_DUMMY_C15_REGS
)) {
5079 define_arm_cp_regs(cpu
, dummy_c15_cp_reginfo
);
5081 if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
5082 define_arm_cp_regs(cpu
, lpae_cp_reginfo
);
5084 /* Slightly awkwardly, the OMAP and StrongARM cores need all of
5085 * cp15 crn=0 to be writes-ignored, whereas for other cores they should
5086 * be read-only (ie write causes UNDEF exception).
5089 ARMCPRegInfo id_pre_v8_midr_cp_reginfo
[] = {
5090 /* Pre-v8 MIDR space.
5091 * Note that the MIDR isn't a simple constant register because
5092 * of the TI925 behaviour where writes to another register can
5093 * cause the MIDR value to change.
5095 * Unimplemented registers in the c15 0 0 0 space default to
5096 * MIDR. Define MIDR first as this entire space, then CTR, TCMTR
5097 * and friends override accordingly.
5100 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= CP_ANY
,
5101 .access
= PL1_R
, .resetvalue
= cpu
->midr
,
5102 .writefn
= arm_cp_write_ignore
, .raw_writefn
= raw_write
,
5103 .readfn
= midr_read
,
5104 .fieldoffset
= offsetof(CPUARMState
, cp15
.c0_cpuid
),
5105 .type
= ARM_CP_OVERRIDE
},
5106 /* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
5108 .cp
= 15, .crn
= 0, .crm
= 3, .opc1
= 0, .opc2
= CP_ANY
,
5109 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5111 .cp
= 15, .crn
= 0, .crm
= 4, .opc1
= 0, .opc2
= CP_ANY
,
5112 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5114 .cp
= 15, .crn
= 0, .crm
= 5, .opc1
= 0, .opc2
= CP_ANY
,
5115 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5117 .cp
= 15, .crn
= 0, .crm
= 6, .opc1
= 0, .opc2
= CP_ANY
,
5118 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5120 .cp
= 15, .crn
= 0, .crm
= 7, .opc1
= 0, .opc2
= CP_ANY
,
5121 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5124 ARMCPRegInfo id_v8_midr_cp_reginfo
[] = {
5125 { .name
= "MIDR_EL1", .state
= ARM_CP_STATE_BOTH
,
5126 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 0, .opc2
= 0,
5127 .access
= PL1_R
, .type
= ARM_CP_NO_RAW
, .resetvalue
= cpu
->midr
,
5128 .fieldoffset
= offsetof(CPUARMState
, cp15
.c0_cpuid
),
5129 .readfn
= midr_read
},
5130 /* crn = 0 op1 = 0 crm = 0 op2 = 4,7 : AArch32 aliases of MIDR */
5131 { .name
= "MIDR", .type
= ARM_CP_ALIAS
| ARM_CP_CONST
,
5132 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 4,
5133 .access
= PL1_R
, .resetvalue
= cpu
->midr
},
5134 { .name
= "MIDR", .type
= ARM_CP_ALIAS
| ARM_CP_CONST
,
5135 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 7,
5136 .access
= PL1_R
, .resetvalue
= cpu
->midr
},
5137 { .name
= "REVIDR_EL1", .state
= ARM_CP_STATE_BOTH
,
5138 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 0, .opc2
= 6,
5139 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= cpu
->revidr
},
5142 ARMCPRegInfo id_cp_reginfo
[] = {
5143 /* These are common to v8 and pre-v8 */
5145 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 1,
5146 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= cpu
->ctr
},
5147 { .name
= "CTR_EL0", .state
= ARM_CP_STATE_AA64
,
5148 .opc0
= 3, .opc1
= 3, .opc2
= 1, .crn
= 0, .crm
= 0,
5149 .access
= PL0_R
, .accessfn
= ctr_el0_access
,
5150 .type
= ARM_CP_CONST
, .resetvalue
= cpu
->ctr
},
5151 /* TCMTR and TLBTR exist in v8 but have no 64-bit versions */
5153 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 2,
5154 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5157 /* TLBTR is specific to VMSA */
5158 ARMCPRegInfo id_tlbtr_reginfo
= {
5160 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 3,
5161 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0,
5163 /* MPUIR is specific to PMSA V6+ */
5164 ARMCPRegInfo id_mpuir_reginfo
= {
5166 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 4,
5167 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5168 .resetvalue
= cpu
->pmsav7_dregion
<< 8
5170 ARMCPRegInfo crn0_wi_reginfo
= {
5171 .name
= "CRN0_WI", .cp
= 15, .crn
= 0, .crm
= CP_ANY
,
5172 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_W
,
5173 .type
= ARM_CP_NOP
| ARM_CP_OVERRIDE
5175 if (arm_feature(env
, ARM_FEATURE_OMAPCP
) ||
5176 arm_feature(env
, ARM_FEATURE_STRONGARM
)) {
5178 /* Register the blanket "writes ignored" value first to cover the
5179 * whole space. Then update the specific ID registers to allow write
5180 * access, so that they ignore writes rather than causing them to
5183 define_one_arm_cp_reg(cpu
, &crn0_wi_reginfo
);
5184 for (r
= id_pre_v8_midr_cp_reginfo
;
5185 r
->type
!= ARM_CP_SENTINEL
; r
++) {
5188 for (r
= id_cp_reginfo
; r
->type
!= ARM_CP_SENTINEL
; r
++) {
5191 id_tlbtr_reginfo
.access
= PL1_RW
;
5192 id_tlbtr_reginfo
.access
= PL1_RW
;
5194 if (arm_feature(env
, ARM_FEATURE_V8
)) {
5195 define_arm_cp_regs(cpu
, id_v8_midr_cp_reginfo
);
5197 define_arm_cp_regs(cpu
, id_pre_v8_midr_cp_reginfo
);
5199 define_arm_cp_regs(cpu
, id_cp_reginfo
);
5200 if (!arm_feature(env
, ARM_FEATURE_PMSA
)) {
5201 define_one_arm_cp_reg(cpu
, &id_tlbtr_reginfo
);
5202 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
5203 define_one_arm_cp_reg(cpu
, &id_mpuir_reginfo
);
5207 if (arm_feature(env
, ARM_FEATURE_MPIDR
)) {
5208 define_arm_cp_regs(cpu
, mpidr_cp_reginfo
);
5211 if (arm_feature(env
, ARM_FEATURE_AUXCR
)) {
5212 ARMCPRegInfo auxcr_reginfo
[] = {
5213 { .name
= "ACTLR_EL1", .state
= ARM_CP_STATE_BOTH
,
5214 .opc0
= 3, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 1,
5215 .access
= PL1_RW
, .type
= ARM_CP_CONST
,
5216 .resetvalue
= cpu
->reset_auxcr
},
5217 { .name
= "ACTLR_EL2", .state
= ARM_CP_STATE_BOTH
,
5218 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 0, .opc2
= 1,
5219 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
5221 { .name
= "ACTLR_EL3", .state
= ARM_CP_STATE_AA64
,
5222 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 0, .opc2
= 1,
5223 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
5227 define_arm_cp_regs(cpu
, auxcr_reginfo
);
5230 if (arm_feature(env
, ARM_FEATURE_CBAR
)) {
5231 if (arm_feature(env
, ARM_FEATURE_AARCH64
)) {
5232 /* 32 bit view is [31:18] 0...0 [43:32]. */
5233 uint32_t cbar32
= (extract64(cpu
->reset_cbar
, 18, 14) << 18)
5234 | extract64(cpu
->reset_cbar
, 32, 12);
5235 ARMCPRegInfo cbar_reginfo
[] = {
5237 .type
= ARM_CP_CONST
,
5238 .cp
= 15, .crn
= 15, .crm
= 0, .opc1
= 4, .opc2
= 0,
5239 .access
= PL1_R
, .resetvalue
= cpu
->reset_cbar
},
5240 { .name
= "CBAR_EL1", .state
= ARM_CP_STATE_AA64
,
5241 .type
= ARM_CP_CONST
,
5242 .opc0
= 3, .opc1
= 1, .crn
= 15, .crm
= 3, .opc2
= 0,
5243 .access
= PL1_R
, .resetvalue
= cbar32
},
5246 /* We don't implement a r/w 64 bit CBAR currently */
5247 assert(arm_feature(env
, ARM_FEATURE_CBAR_RO
));
5248 define_arm_cp_regs(cpu
, cbar_reginfo
);
5250 ARMCPRegInfo cbar
= {
5252 .cp
= 15, .crn
= 15, .crm
= 0, .opc1
= 4, .opc2
= 0,
5253 .access
= PL1_R
|PL3_W
, .resetvalue
= cpu
->reset_cbar
,
5254 .fieldoffset
= offsetof(CPUARMState
,
5255 cp15
.c15_config_base_address
)
5257 if (arm_feature(env
, ARM_FEATURE_CBAR_RO
)) {
5258 cbar
.access
= PL1_R
;
5259 cbar
.fieldoffset
= 0;
5260 cbar
.type
= ARM_CP_CONST
;
5262 define_one_arm_cp_reg(cpu
, &cbar
);
5266 if (arm_feature(env
, ARM_FEATURE_VBAR
)) {
5267 ARMCPRegInfo vbar_cp_reginfo
[] = {
5268 { .name
= "VBAR", .state
= ARM_CP_STATE_BOTH
,
5269 .opc0
= 3, .crn
= 12, .crm
= 0, .opc1
= 0, .opc2
= 0,
5270 .access
= PL1_RW
, .writefn
= vbar_write
,
5271 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.vbar_s
),
5272 offsetof(CPUARMState
, cp15
.vbar_ns
) },
5276 define_arm_cp_regs(cpu
, vbar_cp_reginfo
);
5279 /* Generic registers whose values depend on the implementation */
5281 ARMCPRegInfo sctlr
= {
5282 .name
= "SCTLR", .state
= ARM_CP_STATE_BOTH
,
5283 .opc0
= 3, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 0,
5285 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.sctlr_s
),
5286 offsetof(CPUARMState
, cp15
.sctlr_ns
) },
5287 .writefn
= sctlr_write
, .resetvalue
= cpu
->reset_sctlr
,
5288 .raw_writefn
= raw_write
,
5290 if (arm_feature(env
, ARM_FEATURE_XSCALE
)) {
5291 /* Normally we would always end the TB on an SCTLR write, but Linux
5292 * arch/arm/mach-pxa/sleep.S expects two instructions following
5293 * an MMU enable to execute from cache. Imitate this behaviour.
5295 sctlr
.type
|= ARM_CP_SUPPRESS_TB_END
;
5297 define_one_arm_cp_reg(cpu
, &sctlr
);
5301 void arm_cpu_register_gdb_regs_for_features(ARMCPU
*cpu
)
5303 CPUState
*cs
= CPU(cpu
);
5304 CPUARMState
*env
= &cpu
->env
;
5306 if (arm_feature(env
, ARM_FEATURE_AARCH64
)) {
5307 gdb_register_coprocessor(cs
, aarch64_fpu_gdb_get_reg
,
5308 aarch64_fpu_gdb_set_reg
,
5309 34, "aarch64-fpu.xml", 0);
5310 } else if (arm_feature(env
, ARM_FEATURE_NEON
)) {
5311 gdb_register_coprocessor(cs
, vfp_gdb_get_reg
, vfp_gdb_set_reg
,
5312 51, "arm-neon.xml", 0);
5313 } else if (arm_feature(env
, ARM_FEATURE_VFP3
)) {
5314 gdb_register_coprocessor(cs
, vfp_gdb_get_reg
, vfp_gdb_set_reg
,
5315 35, "arm-vfp3.xml", 0);
5316 } else if (arm_feature(env
, ARM_FEATURE_VFP
)) {
5317 gdb_register_coprocessor(cs
, vfp_gdb_get_reg
, vfp_gdb_set_reg
,
5318 19, "arm-vfp.xml", 0);
5322 /* Sort alphabetically by type name, except for "any". */
5323 static gint
arm_cpu_list_compare(gconstpointer a
, gconstpointer b
)
5325 ObjectClass
*class_a
= (ObjectClass
*)a
;
5326 ObjectClass
*class_b
= (ObjectClass
*)b
;
5327 const char *name_a
, *name_b
;
5329 name_a
= object_class_get_name(class_a
);
5330 name_b
= object_class_get_name(class_b
);
5331 if (strcmp(name_a
, "any-" TYPE_ARM_CPU
) == 0) {
5333 } else if (strcmp(name_b
, "any-" TYPE_ARM_CPU
) == 0) {
5336 return strcmp(name_a
, name_b
);
5340 static void arm_cpu_list_entry(gpointer data
, gpointer user_data
)
5342 ObjectClass
*oc
= data
;
5343 CPUListState
*s
= user_data
;
5344 const char *typename
;
5347 typename
= object_class_get_name(oc
);
5348 name
= g_strndup(typename
, strlen(typename
) - strlen("-" TYPE_ARM_CPU
));
5349 (*s
->cpu_fprintf
)(s
->file
, " %s\n",
5354 void arm_cpu_list(FILE *f
, fprintf_function cpu_fprintf
)
5358 .cpu_fprintf
= cpu_fprintf
,
5362 list
= object_class_get_list(TYPE_ARM_CPU
, false);
5363 list
= g_slist_sort(list
, arm_cpu_list_compare
);
5364 (*cpu_fprintf
)(f
, "Available CPUs:\n");
5365 g_slist_foreach(list
, arm_cpu_list_entry
, &s
);
5368 /* The 'host' CPU type is dynamically registered only if KVM is
5369 * enabled, so we have to special-case it here:
5371 (*cpu_fprintf
)(f
, " host (only available in KVM mode)\n");
5375 static void arm_cpu_add_definition(gpointer data
, gpointer user_data
)
5377 ObjectClass
*oc
= data
;
5378 CpuDefinitionInfoList
**cpu_list
= user_data
;
5379 CpuDefinitionInfoList
*entry
;
5380 CpuDefinitionInfo
*info
;
5381 const char *typename
;
5383 typename
= object_class_get_name(oc
);
5384 info
= g_malloc0(sizeof(*info
));
5385 info
->name
= g_strndup(typename
,
5386 strlen(typename
) - strlen("-" TYPE_ARM_CPU
));
5387 info
->q_typename
= g_strdup(typename
);
5389 entry
= g_malloc0(sizeof(*entry
));
5390 entry
->value
= info
;
5391 entry
->next
= *cpu_list
;
5395 CpuDefinitionInfoList
*arch_query_cpu_definitions(Error
**errp
)
5397 CpuDefinitionInfoList
*cpu_list
= NULL
;
5400 list
= object_class_get_list(TYPE_ARM_CPU
, false);
5401 g_slist_foreach(list
, arm_cpu_add_definition
, &cpu_list
);
5407 static void add_cpreg_to_hashtable(ARMCPU
*cpu
, const ARMCPRegInfo
*r
,
5408 void *opaque
, int state
, int secstate
,
5409 int crm
, int opc1
, int opc2
)
5411 /* Private utility function for define_one_arm_cp_reg_with_opaque():
5412 * add a single reginfo struct to the hash table.
5414 uint32_t *key
= g_new(uint32_t, 1);
5415 ARMCPRegInfo
*r2
= g_memdup(r
, sizeof(ARMCPRegInfo
));
5416 int is64
= (r
->type
& ARM_CP_64BIT
) ? 1 : 0;
5417 int ns
= (secstate
& ARM_CP_SECSTATE_NS
) ? 1 : 0;
5419 /* Reset the secure state to the specific incoming state. This is
5420 * necessary as the register may have been defined with both states.
5422 r2
->secure
= secstate
;
5424 if (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1]) {
5425 /* Register is banked (using both entries in array).
5426 * Overwriting fieldoffset as the array is only used to define
5427 * banked registers but later only fieldoffset is used.
5429 r2
->fieldoffset
= r
->bank_fieldoffsets
[ns
];
5432 if (state
== ARM_CP_STATE_AA32
) {
5433 if (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1]) {
5434 /* If the register is banked then we don't need to migrate or
5435 * reset the 32-bit instance in certain cases:
5437 * 1) If the register has both 32-bit and 64-bit instances then we
5438 * can count on the 64-bit instance taking care of the
5440 * 2) If ARMv8 is enabled then we can count on a 64-bit version
5441 * taking care of the secure bank. This requires that separate
5442 * 32 and 64-bit definitions are provided.
5444 if ((r
->state
== ARM_CP_STATE_BOTH
&& ns
) ||
5445 (arm_feature(&cpu
->env
, ARM_FEATURE_V8
) && !ns
)) {
5446 r2
->type
|= ARM_CP_ALIAS
;
5448 } else if ((secstate
!= r
->secure
) && !ns
) {
5449 /* The register is not banked so we only want to allow migration of
5450 * the non-secure instance.
5452 r2
->type
|= ARM_CP_ALIAS
;
5455 if (r
->state
== ARM_CP_STATE_BOTH
) {
5456 /* We assume it is a cp15 register if the .cp field is left unset.
5462 #ifdef HOST_WORDS_BIGENDIAN
5463 if (r2
->fieldoffset
) {
5464 r2
->fieldoffset
+= sizeof(uint32_t);
5469 if (state
== ARM_CP_STATE_AA64
) {
5470 /* To allow abbreviation of ARMCPRegInfo
5471 * definitions, we treat cp == 0 as equivalent to
5472 * the value for "standard guest-visible sysreg".
5473 * STATE_BOTH definitions are also always "standard
5474 * sysreg" in their AArch64 view (the .cp value may
5475 * be non-zero for the benefit of the AArch32 view).
5477 if (r
->cp
== 0 || r
->state
== ARM_CP_STATE_BOTH
) {
5478 r2
->cp
= CP_REG_ARM64_SYSREG_CP
;
5480 *key
= ENCODE_AA64_CP_REG(r2
->cp
, r2
->crn
, crm
,
5481 r2
->opc0
, opc1
, opc2
);
5483 *key
= ENCODE_CP_REG(r2
->cp
, is64
, ns
, r2
->crn
, crm
, opc1
, opc2
);
5486 r2
->opaque
= opaque
;
5488 /* reginfo passed to helpers is correct for the actual access,
5489 * and is never ARM_CP_STATE_BOTH:
5492 /* Make sure reginfo passed to helpers for wildcarded regs
5493 * has the correct crm/opc1/opc2 for this reg, not CP_ANY:
5498 /* By convention, for wildcarded registers only the first
5499 * entry is used for migration; the others are marked as
5500 * ALIAS so we don't try to transfer the register
5501 * multiple times. Special registers (ie NOP/WFI) are
5502 * never migratable and not even raw-accessible.
5504 if ((r
->type
& ARM_CP_SPECIAL
)) {
5505 r2
->type
|= ARM_CP_NO_RAW
;
5507 if (((r
->crm
== CP_ANY
) && crm
!= 0) ||
5508 ((r
->opc1
== CP_ANY
) && opc1
!= 0) ||
5509 ((r
->opc2
== CP_ANY
) && opc2
!= 0)) {
5510 r2
->type
|= ARM_CP_ALIAS
;
5513 /* Check that raw accesses are either forbidden or handled. Note that
5514 * we can't assert this earlier because the setup of fieldoffset for
5515 * banked registers has to be done first.
5517 if (!(r2
->type
& ARM_CP_NO_RAW
)) {
5518 assert(!raw_accessors_invalid(r2
));
5521 /* Overriding of an existing definition must be explicitly
5524 if (!(r
->type
& ARM_CP_OVERRIDE
)) {
5525 ARMCPRegInfo
*oldreg
;
5526 oldreg
= g_hash_table_lookup(cpu
->cp_regs
, key
);
5527 if (oldreg
&& !(oldreg
->type
& ARM_CP_OVERRIDE
)) {
5528 fprintf(stderr
, "Register redefined: cp=%d %d bit "
5529 "crn=%d crm=%d opc1=%d opc2=%d, "
5530 "was %s, now %s\n", r2
->cp
, 32 + 32 * is64
,
5531 r2
->crn
, r2
->crm
, r2
->opc1
, r2
->opc2
,
5532 oldreg
->name
, r2
->name
);
5533 g_assert_not_reached();
5536 g_hash_table_insert(cpu
->cp_regs
, key
, r2
);
5540 void define_one_arm_cp_reg_with_opaque(ARMCPU
*cpu
,
5541 const ARMCPRegInfo
*r
, void *opaque
)
5543 /* Define implementations of coprocessor registers.
5544 * We store these in a hashtable because typically
5545 * there are less than 150 registers in a space which
5546 * is 16*16*16*8*8 = 262144 in size.
5547 * Wildcarding is supported for the crm, opc1 and opc2 fields.
5548 * If a register is defined twice then the second definition is
5549 * used, so this can be used to define some generic registers and
5550 * then override them with implementation specific variations.
5551 * At least one of the original and the second definition should
5552 * include ARM_CP_OVERRIDE in its type bits -- this is just a guard
5553 * against accidental use.
5555 * The state field defines whether the register is to be
5556 * visible in the AArch32 or AArch64 execution state. If the
5557 * state is set to ARM_CP_STATE_BOTH then we synthesise a
5558 * reginfo structure for the AArch32 view, which sees the lower
5559 * 32 bits of the 64 bit register.
5561 * Only registers visible in AArch64 may set r->opc0; opc0 cannot
5562 * be wildcarded. AArch64 registers are always considered to be 64
5563 * bits; the ARM_CP_64BIT* flag applies only to the AArch32 view of
5564 * the register, if any.
5566 int crm
, opc1
, opc2
, state
;
5567 int crmmin
= (r
->crm
== CP_ANY
) ? 0 : r
->crm
;
5568 int crmmax
= (r
->crm
== CP_ANY
) ? 15 : r
->crm
;
5569 int opc1min
= (r
->opc1
== CP_ANY
) ? 0 : r
->opc1
;
5570 int opc1max
= (r
->opc1
== CP_ANY
) ? 7 : r
->opc1
;
5571 int opc2min
= (r
->opc2
== CP_ANY
) ? 0 : r
->opc2
;
5572 int opc2max
= (r
->opc2
== CP_ANY
) ? 7 : r
->opc2
;
5573 /* 64 bit registers have only CRm and Opc1 fields */
5574 assert(!((r
->type
& ARM_CP_64BIT
) && (r
->opc2
|| r
->crn
)));
5575 /* op0 only exists in the AArch64 encodings */
5576 assert((r
->state
!= ARM_CP_STATE_AA32
) || (r
->opc0
== 0));
5577 /* AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless */
5578 assert((r
->state
!= ARM_CP_STATE_AA64
) || !(r
->type
& ARM_CP_64BIT
));
5579 /* The AArch64 pseudocode CheckSystemAccess() specifies that op1
5580 * encodes a minimum access level for the register. We roll this
5581 * runtime check into our general permission check code, so check
5582 * here that the reginfo's specified permissions are strict enough
5583 * to encompass the generic architectural permission check.
5585 if (r
->state
!= ARM_CP_STATE_AA32
) {
5588 case 0: case 1: case 2:
5601 /* unallocated encoding, so not possible */
5609 /* min_EL EL1, secure mode only (we don't check the latter) */
5613 /* broken reginfo with out-of-range opc1 */
5617 /* assert our permissions are not too lax (stricter is fine) */
5618 assert((r
->access
& ~mask
) == 0);
5621 /* Check that the register definition has enough info to handle
5622 * reads and writes if they are permitted.
5624 if (!(r
->type
& (ARM_CP_SPECIAL
|ARM_CP_CONST
))) {
5625 if (r
->access
& PL3_R
) {
5626 assert((r
->fieldoffset
||
5627 (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1])) ||
5630 if (r
->access
& PL3_W
) {
5631 assert((r
->fieldoffset
||
5632 (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1])) ||
5636 /* Bad type field probably means missing sentinel at end of reg list */
5637 assert(cptype_valid(r
->type
));
5638 for (crm
= crmmin
; crm
<= crmmax
; crm
++) {
5639 for (opc1
= opc1min
; opc1
<= opc1max
; opc1
++) {
5640 for (opc2
= opc2min
; opc2
<= opc2max
; opc2
++) {
5641 for (state
= ARM_CP_STATE_AA32
;
5642 state
<= ARM_CP_STATE_AA64
; state
++) {
5643 if (r
->state
!= state
&& r
->state
!= ARM_CP_STATE_BOTH
) {
5646 if (state
== ARM_CP_STATE_AA32
) {
5647 /* Under AArch32 CP registers can be common
5648 * (same for secure and non-secure world) or banked.
5650 switch (r
->secure
) {
5651 case ARM_CP_SECSTATE_S
:
5652 case ARM_CP_SECSTATE_NS
:
5653 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
5654 r
->secure
, crm
, opc1
, opc2
);
5657 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
5660 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
5666 /* AArch64 registers get mapped to non-secure instance
5668 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
5678 void define_arm_cp_regs_with_opaque(ARMCPU
*cpu
,
5679 const ARMCPRegInfo
*regs
, void *opaque
)
5681 /* Define a whole list of registers */
5682 const ARMCPRegInfo
*r
;
5683 for (r
= regs
; r
->type
!= ARM_CP_SENTINEL
; r
++) {
5684 define_one_arm_cp_reg_with_opaque(cpu
, r
, opaque
);
5688 const ARMCPRegInfo
*get_arm_cp_reginfo(GHashTable
*cpregs
, uint32_t encoded_cp
)
5690 return g_hash_table_lookup(cpregs
, &encoded_cp
);
5693 void arm_cp_write_ignore(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5696 /* Helper coprocessor write function for write-ignore registers */
5699 uint64_t arm_cp_read_zero(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
5701 /* Helper coprocessor write function for read-as-zero registers */
5705 void arm_cp_reset_ignore(CPUARMState
*env
, const ARMCPRegInfo
*opaque
)
5707 /* Helper coprocessor reset function for do-nothing-on-reset registers */
5710 static int bad_mode_switch(CPUARMState
*env
, int mode
, CPSRWriteType write_type
)
5712 /* Return true if it is not valid for us to switch to
5713 * this CPU mode (ie all the UNPREDICTABLE cases in
5714 * the ARM ARM CPSRWriteByInstr pseudocode).
5717 /* Changes to or from Hyp via MSR and CPS are illegal. */
5718 if (write_type
== CPSRWriteByInstr
&&
5719 ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_HYP
||
5720 mode
== ARM_CPU_MODE_HYP
)) {
5725 case ARM_CPU_MODE_USR
:
5727 case ARM_CPU_MODE_SYS
:
5728 case ARM_CPU_MODE_SVC
:
5729 case ARM_CPU_MODE_ABT
:
5730 case ARM_CPU_MODE_UND
:
5731 case ARM_CPU_MODE_IRQ
:
5732 case ARM_CPU_MODE_FIQ
:
5733 /* Note that we don't implement the IMPDEF NSACR.RFR which in v7
5734 * allows FIQ mode to be Secure-only. (In v8 this doesn't exist.)
5736 /* If HCR.TGE is set then changes from Monitor to NS PL1 via MSR
5737 * and CPS are treated as illegal mode changes.
5739 if (write_type
== CPSRWriteByInstr
&&
5740 (env
->cp15
.hcr_el2
& HCR_TGE
) &&
5741 (env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_MON
&&
5742 !arm_is_secure_below_el3(env
)) {
5746 case ARM_CPU_MODE_HYP
:
5747 return !arm_feature(env
, ARM_FEATURE_EL2
)
5748 || arm_current_el(env
) < 2 || arm_is_secure(env
);
5749 case ARM_CPU_MODE_MON
:
5750 return arm_current_el(env
) < 3;
5756 uint32_t cpsr_read(CPUARMState
*env
)
5759 ZF
= (env
->ZF
== 0);
5760 return env
->uncached_cpsr
| (env
->NF
& 0x80000000) | (ZF
<< 30) |
5761 (env
->CF
<< 29) | ((env
->VF
& 0x80000000) >> 3) | (env
->QF
<< 27)
5762 | (env
->thumb
<< 5) | ((env
->condexec_bits
& 3) << 25)
5763 | ((env
->condexec_bits
& 0xfc) << 8)
5764 | (env
->GE
<< 16) | (env
->daif
& CPSR_AIF
);
5767 void cpsr_write(CPUARMState
*env
, uint32_t val
, uint32_t mask
,
5768 CPSRWriteType write_type
)
5770 uint32_t changed_daif
;
5772 if (mask
& CPSR_NZCV
) {
5773 env
->ZF
= (~val
) & CPSR_Z
;
5775 env
->CF
= (val
>> 29) & 1;
5776 env
->VF
= (val
<< 3) & 0x80000000;
5779 env
->QF
= ((val
& CPSR_Q
) != 0);
5781 env
->thumb
= ((val
& CPSR_T
) != 0);
5782 if (mask
& CPSR_IT_0_1
) {
5783 env
->condexec_bits
&= ~3;
5784 env
->condexec_bits
|= (val
>> 25) & 3;
5786 if (mask
& CPSR_IT_2_7
) {
5787 env
->condexec_bits
&= 3;
5788 env
->condexec_bits
|= (val
>> 8) & 0xfc;
5790 if (mask
& CPSR_GE
) {
5791 env
->GE
= (val
>> 16) & 0xf;
5794 /* In a V7 implementation that includes the security extensions but does
5795 * not include Virtualization Extensions the SCR.FW and SCR.AW bits control
5796 * whether non-secure software is allowed to change the CPSR_F and CPSR_A
5797 * bits respectively.
5799 * In a V8 implementation, it is permitted for privileged software to
5800 * change the CPSR A/F bits regardless of the SCR.AW/FW bits.
5802 if (write_type
!= CPSRWriteRaw
&& !arm_feature(env
, ARM_FEATURE_V8
) &&
5803 arm_feature(env
, ARM_FEATURE_EL3
) &&
5804 !arm_feature(env
, ARM_FEATURE_EL2
) &&
5805 !arm_is_secure(env
)) {
5807 changed_daif
= (env
->daif
^ val
) & mask
;
5809 if (changed_daif
& CPSR_A
) {
5810 /* Check to see if we are allowed to change the masking of async
5811 * abort exceptions from a non-secure state.
5813 if (!(env
->cp15
.scr_el3
& SCR_AW
)) {
5814 qemu_log_mask(LOG_GUEST_ERROR
,
5815 "Ignoring attempt to switch CPSR_A flag from "
5816 "non-secure world with SCR.AW bit clear\n");
5821 if (changed_daif
& CPSR_F
) {
5822 /* Check to see if we are allowed to change the masking of FIQ
5823 * exceptions from a non-secure state.
5825 if (!(env
->cp15
.scr_el3
& SCR_FW
)) {
5826 qemu_log_mask(LOG_GUEST_ERROR
,
5827 "Ignoring attempt to switch CPSR_F flag from "
5828 "non-secure world with SCR.FW bit clear\n");
5832 /* Check whether non-maskable FIQ (NMFI) support is enabled.
5833 * If this bit is set software is not allowed to mask
5834 * FIQs, but is allowed to set CPSR_F to 0.
5836 if ((A32_BANKED_CURRENT_REG_GET(env
, sctlr
) & SCTLR_NMFI
) &&
5838 qemu_log_mask(LOG_GUEST_ERROR
,
5839 "Ignoring attempt to enable CPSR_F flag "
5840 "(non-maskable FIQ [NMFI] support enabled)\n");
5846 env
->daif
&= ~(CPSR_AIF
& mask
);
5847 env
->daif
|= val
& CPSR_AIF
& mask
;
5849 if (write_type
!= CPSRWriteRaw
&&
5850 ((env
->uncached_cpsr
^ val
) & mask
& CPSR_M
)) {
5851 if ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_USR
) {
5852 /* Note that we can only get here in USR mode if this is a
5853 * gdb stub write; for this case we follow the architectural
5854 * behaviour for guest writes in USR mode of ignoring an attempt
5855 * to switch mode. (Those are caught by translate.c for writes
5856 * triggered by guest instructions.)
5859 } else if (bad_mode_switch(env
, val
& CPSR_M
, write_type
)) {
5860 /* Attempt to switch to an invalid mode: this is UNPREDICTABLE in
5861 * v7, and has defined behaviour in v8:
5862 * + leave CPSR.M untouched
5863 * + allow changes to the other CPSR fields
5865 * For user changes via the GDB stub, we don't set PSTATE.IL,
5866 * as this would be unnecessarily harsh for a user error.
5869 if (write_type
!= CPSRWriteByGDBStub
&&
5870 arm_feature(env
, ARM_FEATURE_V8
)) {
5875 switch_mode(env
, val
& CPSR_M
);
5878 mask
&= ~CACHED_CPSR_BITS
;
5879 env
->uncached_cpsr
= (env
->uncached_cpsr
& ~mask
) | (val
& mask
);
5882 /* Sign/zero extend */
5883 uint32_t HELPER(sxtb16
)(uint32_t x
)
5886 res
= (uint16_t)(int8_t)x
;
5887 res
|= (uint32_t)(int8_t)(x
>> 16) << 16;
5891 uint32_t HELPER(uxtb16
)(uint32_t x
)
5894 res
= (uint16_t)(uint8_t)x
;
5895 res
|= (uint32_t)(uint8_t)(x
>> 16) << 16;
5899 int32_t HELPER(sdiv
)(int32_t num
, int32_t den
)
5903 if (num
== INT_MIN
&& den
== -1)
5908 uint32_t HELPER(udiv
)(uint32_t num
, uint32_t den
)
5915 uint32_t HELPER(rbit
)(uint32_t x
)
5920 #if defined(CONFIG_USER_ONLY)
5922 /* These should probably raise undefined insn exceptions. */
5923 void HELPER(v7m_msr
)(CPUARMState
*env
, uint32_t reg
, uint32_t val
)
5925 ARMCPU
*cpu
= arm_env_get_cpu(env
);
5927 cpu_abort(CPU(cpu
), "v7m_msr %d\n", reg
);
5930 uint32_t HELPER(v7m_mrs
)(CPUARMState
*env
, uint32_t reg
)
5932 ARMCPU
*cpu
= arm_env_get_cpu(env
);
5934 cpu_abort(CPU(cpu
), "v7m_mrs %d\n", reg
);
5938 void HELPER(v7m_bxns
)(CPUARMState
*env
, uint32_t dest
)
5940 /* translate.c should never generate calls here in user-only mode */
5941 g_assert_not_reached();
5944 void HELPER(v7m_blxns
)(CPUARMState
*env
, uint32_t dest
)
5946 /* translate.c should never generate calls here in user-only mode */
5947 g_assert_not_reached();
5950 void switch_mode(CPUARMState
*env
, int mode
)
5952 ARMCPU
*cpu
= arm_env_get_cpu(env
);
5954 if (mode
!= ARM_CPU_MODE_USR
) {
5955 cpu_abort(CPU(cpu
), "Tried to switch out of user mode\n");
5959 uint32_t arm_phys_excp_target_el(CPUState
*cs
, uint32_t excp_idx
,
5960 uint32_t cur_el
, bool secure
)
5965 void aarch64_sync_64_to_32(CPUARMState
*env
)
5967 g_assert_not_reached();
5972 void switch_mode(CPUARMState
*env
, int mode
)
5977 old_mode
= env
->uncached_cpsr
& CPSR_M
;
5978 if (mode
== old_mode
)
5981 if (old_mode
== ARM_CPU_MODE_FIQ
) {
5982 memcpy (env
->fiq_regs
, env
->regs
+ 8, 5 * sizeof(uint32_t));
5983 memcpy (env
->regs
+ 8, env
->usr_regs
, 5 * sizeof(uint32_t));
5984 } else if (mode
== ARM_CPU_MODE_FIQ
) {
5985 memcpy (env
->usr_regs
, env
->regs
+ 8, 5 * sizeof(uint32_t));
5986 memcpy (env
->regs
+ 8, env
->fiq_regs
, 5 * sizeof(uint32_t));
5989 i
= bank_number(old_mode
);
5990 env
->banked_r13
[i
] = env
->regs
[13];
5991 env
->banked_r14
[i
] = env
->regs
[14];
5992 env
->banked_spsr
[i
] = env
->spsr
;
5994 i
= bank_number(mode
);
5995 env
->regs
[13] = env
->banked_r13
[i
];
5996 env
->regs
[14] = env
->banked_r14
[i
];
5997 env
->spsr
= env
->banked_spsr
[i
];
6000 /* Physical Interrupt Target EL Lookup Table
6002 * [ From ARM ARM section G1.13.4 (Table G1-15) ]
6004 * The below multi-dimensional table is used for looking up the target
6005 * exception level given numerous condition criteria. Specifically, the
6006 * target EL is based on SCR and HCR routing controls as well as the
6007 * currently executing EL and secure state.
6010 * target_el_table[2][2][2][2][2][4]
6011 * | | | | | +--- Current EL
6012 * | | | | +------ Non-secure(0)/Secure(1)
6013 * | | | +--------- HCR mask override
6014 * | | +------------ SCR exec state control
6015 * | +--------------- SCR mask override
6016 * +------------------ 32-bit(0)/64-bit(1) EL3
6018 * The table values are as such:
6022 * The ARM ARM target EL table includes entries indicating that an "exception
6023 * is not taken". The two cases where this is applicable are:
6024 * 1) An exception is taken from EL3 but the SCR does not have the exception
6026 * 2) An exception is taken from EL2 but the HCR does not have the exception
6028 * In these two cases, the below table contain a target of EL1. This value is
6029 * returned as it is expected that the consumer of the table data will check
6030 * for "target EL >= current EL" to ensure the exception is not taken.
6034 * BIT IRQ IMO Non-secure Secure
6035 * EL3 FIQ RW FMO EL0 EL1 EL2 EL3 EL0 EL1 EL2 EL3
6037 static const int8_t target_el_table
[2][2][2][2][2][4] = {
6038 {{{{/* 0 0 0 0 */{ 1, 1, 2, -1 },{ 3, -1, -1, 3 },},
6039 {/* 0 0 0 1 */{ 2, 2, 2, -1 },{ 3, -1, -1, 3 },},},
6040 {{/* 0 0 1 0 */{ 1, 1, 2, -1 },{ 3, -1, -1, 3 },},
6041 {/* 0 0 1 1 */{ 2, 2, 2, -1 },{ 3, -1, -1, 3 },},},},
6042 {{{/* 0 1 0 0 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},
6043 {/* 0 1 0 1 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},},
6044 {{/* 0 1 1 0 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},
6045 {/* 0 1 1 1 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},},},},
6046 {{{{/* 1 0 0 0 */{ 1, 1, 2, -1 },{ 1, 1, -1, 1 },},
6047 {/* 1 0 0 1 */{ 2, 2, 2, -1 },{ 1, 1, -1, 1 },},},
6048 {{/* 1 0 1 0 */{ 1, 1, 1, -1 },{ 1, 1, -1, 1 },},
6049 {/* 1 0 1 1 */{ 2, 2, 2, -1 },{ 1, 1, -1, 1 },},},},
6050 {{{/* 1 1 0 0 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},
6051 {/* 1 1 0 1 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},},
6052 {{/* 1 1 1 0 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},
6053 {/* 1 1 1 1 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},},},},
6057 * Determine the target EL for physical exceptions
6059 uint32_t arm_phys_excp_target_el(CPUState
*cs
, uint32_t excp_idx
,
6060 uint32_t cur_el
, bool secure
)
6062 CPUARMState
*env
= cs
->env_ptr
;
6067 /* Is the highest EL AArch64? */
6068 int is64
= arm_feature(env
, ARM_FEATURE_AARCH64
);
6070 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
6071 rw
= ((env
->cp15
.scr_el3
& SCR_RW
) == SCR_RW
);
6073 /* Either EL2 is the highest EL (and so the EL2 register width
6074 * is given by is64); or there is no EL2 or EL3, in which case
6075 * the value of 'rw' does not affect the table lookup anyway.
6082 scr
= ((env
->cp15
.scr_el3
& SCR_IRQ
) == SCR_IRQ
);
6083 hcr
= ((env
->cp15
.hcr_el2
& HCR_IMO
) == HCR_IMO
);
6086 scr
= ((env
->cp15
.scr_el3
& SCR_FIQ
) == SCR_FIQ
);
6087 hcr
= ((env
->cp15
.hcr_el2
& HCR_FMO
) == HCR_FMO
);
6090 scr
= ((env
->cp15
.scr_el3
& SCR_EA
) == SCR_EA
);
6091 hcr
= ((env
->cp15
.hcr_el2
& HCR_AMO
) == HCR_AMO
);
6095 /* If HCR.TGE is set then HCR is treated as being 1 */
6096 hcr
|= ((env
->cp15
.hcr_el2
& HCR_TGE
) == HCR_TGE
);
6098 /* Perform a table-lookup for the target EL given the current state */
6099 target_el
= target_el_table
[is64
][scr
][rw
][hcr
][secure
][cur_el
];
6101 assert(target_el
> 0);
6106 static void v7m_push(CPUARMState
*env
, uint32_t val
)
6108 CPUState
*cs
= CPU(arm_env_get_cpu(env
));
6111 stl_phys(cs
->as
, env
->regs
[13], val
);
6114 /* Return true if we're using the process stack pointer (not the MSP) */
6115 static bool v7m_using_psp(CPUARMState
*env
)
6117 /* Handler mode always uses the main stack; for thread mode
6118 * the CONTROL.SPSEL bit determines the answer.
6119 * Note that in v7M it is not possible to be in Handler mode with
6120 * CONTROL.SPSEL non-zero, but in v8M it is, so we must check both.
6122 return !arm_v7m_is_handler_mode(env
) &&
6123 env
->v7m
.control
[env
->v7m
.secure
] & R_V7M_CONTROL_SPSEL_MASK
;
6126 /* Write to v7M CONTROL.SPSEL bit for the specified security bank.
6127 * This may change the current stack pointer between Main and Process
6128 * stack pointers if it is done for the CONTROL register for the current
6131 static void write_v7m_control_spsel_for_secstate(CPUARMState
*env
,
6135 bool old_is_psp
= v7m_using_psp(env
);
6137 env
->v7m
.control
[secstate
] =
6138 deposit32(env
->v7m
.control
[secstate
],
6139 R_V7M_CONTROL_SPSEL_SHIFT
,
6140 R_V7M_CONTROL_SPSEL_LENGTH
, new_spsel
);
6142 if (secstate
== env
->v7m
.secure
) {
6143 bool new_is_psp
= v7m_using_psp(env
);
6146 if (old_is_psp
!= new_is_psp
) {
6147 tmp
= env
->v7m
.other_sp
;
6148 env
->v7m
.other_sp
= env
->regs
[13];
6149 env
->regs
[13] = tmp
;
6154 /* Write to v7M CONTROL.SPSEL bit. This may change the current
6155 * stack pointer between Main and Process stack pointers.
6157 static void write_v7m_control_spsel(CPUARMState
*env
, bool new_spsel
)
6159 write_v7m_control_spsel_for_secstate(env
, new_spsel
, env
->v7m
.secure
);
6162 void write_v7m_exception(CPUARMState
*env
, uint32_t new_exc
)
6164 /* Write a new value to v7m.exception, thus transitioning into or out
6165 * of Handler mode; this may result in a change of active stack pointer.
6167 bool new_is_psp
, old_is_psp
= v7m_using_psp(env
);
6170 env
->v7m
.exception
= new_exc
;
6172 new_is_psp
= v7m_using_psp(env
);
6174 if (old_is_psp
!= new_is_psp
) {
6175 tmp
= env
->v7m
.other_sp
;
6176 env
->v7m
.other_sp
= env
->regs
[13];
6177 env
->regs
[13] = tmp
;
6181 /* Switch M profile security state between NS and S */
6182 static void switch_v7m_security_state(CPUARMState
*env
, bool new_secstate
)
6184 uint32_t new_ss_msp
, new_ss_psp
;
6186 if (env
->v7m
.secure
== new_secstate
) {
6190 /* All the banked state is accessed by looking at env->v7m.secure
6191 * except for the stack pointer; rearrange the SP appropriately.
6193 new_ss_msp
= env
->v7m
.other_ss_msp
;
6194 new_ss_psp
= env
->v7m
.other_ss_psp
;
6196 if (v7m_using_psp(env
)) {
6197 env
->v7m
.other_ss_psp
= env
->regs
[13];
6198 env
->v7m
.other_ss_msp
= env
->v7m
.other_sp
;
6200 env
->v7m
.other_ss_msp
= env
->regs
[13];
6201 env
->v7m
.other_ss_psp
= env
->v7m
.other_sp
;
6204 env
->v7m
.secure
= new_secstate
;
6206 if (v7m_using_psp(env
)) {
6207 env
->regs
[13] = new_ss_psp
;
6208 env
->v7m
.other_sp
= new_ss_msp
;
6210 env
->regs
[13] = new_ss_msp
;
6211 env
->v7m
.other_sp
= new_ss_psp
;
6215 void HELPER(v7m_bxns
)(CPUARMState
*env
, uint32_t dest
)
6218 * - if the return value is a magic value, do exception return (like BX)
6219 * - otherwise bit 0 of the return value is the target security state
6223 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
6224 /* Covers FNC_RETURN and EXC_RETURN magic */
6225 min_magic
= FNC_RETURN_MIN_MAGIC
;
6227 /* EXC_RETURN magic only */
6228 min_magic
= EXC_RETURN_MIN_MAGIC
;
6231 if (dest
>= min_magic
) {
6232 /* This is an exception return magic value; put it where
6233 * do_v7m_exception_exit() expects and raise EXCEPTION_EXIT.
6234 * Note that if we ever add gen_ss_advance() singlestep support to
6235 * M profile this should count as an "instruction execution complete"
6236 * event (compare gen_bx_excret_final_code()).
6238 env
->regs
[15] = dest
& ~1;
6239 env
->thumb
= dest
& 1;
6240 HELPER(exception_internal
)(env
, EXCP_EXCEPTION_EXIT
);
6244 /* translate.c should have made BXNS UNDEF unless we're secure */
6245 assert(env
->v7m
.secure
);
6247 switch_v7m_security_state(env
, dest
& 1);
6249 env
->regs
[15] = dest
& ~1;
6252 void HELPER(v7m_blxns
)(CPUARMState
*env
, uint32_t dest
)
6254 /* Handle v7M BLXNS:
6255 * - bit 0 of the destination address is the target security state
6258 /* At this point regs[15] is the address just after the BLXNS */
6259 uint32_t nextinst
= env
->regs
[15] | 1;
6260 uint32_t sp
= env
->regs
[13] - 8;
6263 /* translate.c will have made BLXNS UNDEF unless we're secure */
6264 assert(env
->v7m
.secure
);
6267 /* target is Secure, so this is just a normal BLX,
6268 * except that the low bit doesn't indicate Thumb/not.
6270 env
->regs
[14] = nextinst
;
6272 env
->regs
[15] = dest
& ~1;
6276 /* Target is non-secure: first push a stack frame */
6277 if (!QEMU_IS_ALIGNED(sp
, 8)) {
6278 qemu_log_mask(LOG_GUEST_ERROR
,
6279 "BLXNS with misaligned SP is UNPREDICTABLE\n");
6282 saved_psr
= env
->v7m
.exception
;
6283 if (env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_SFPA_MASK
) {
6284 saved_psr
|= XPSR_SFPA
;
6287 /* Note that these stores can throw exceptions on MPU faults */
6288 cpu_stl_data(env
, sp
, nextinst
);
6289 cpu_stl_data(env
, sp
+ 4, saved_psr
);
6292 env
->regs
[14] = 0xfeffffff;
6293 if (arm_v7m_is_handler_mode(env
)) {
6294 /* Write a dummy value to IPSR, to avoid leaking the current secure
6295 * exception number to non-secure code. This is guaranteed not
6296 * to cause write_v7m_exception() to actually change stacks.
6298 write_v7m_exception(env
, 1);
6300 switch_v7m_security_state(env
, 0);
6302 env
->regs
[15] = dest
;
6305 static uint32_t *get_v7m_sp_ptr(CPUARMState
*env
, bool secure
, bool threadmode
,
6308 /* Return a pointer to the location where we currently store the
6309 * stack pointer for the requested security state and thread mode.
6310 * This pointer will become invalid if the CPU state is updated
6311 * such that the stack pointers are switched around (eg changing
6312 * the SPSEL control bit).
6313 * Compare the v8M ARM ARM pseudocode LookUpSP_with_security_mode().
6314 * Unlike that pseudocode, we require the caller to pass us in the
6315 * SPSEL control bit value; this is because we also use this
6316 * function in handling of pushing of the callee-saves registers
6317 * part of the v8M stack frame (pseudocode PushCalleeStack()),
6318 * and in the tailchain codepath the SPSEL bit comes from the exception
6319 * return magic LR value from the previous exception. The pseudocode
6320 * opencodes the stack-selection in PushCalleeStack(), but we prefer
6321 * to make this utility function generic enough to do the job.
6323 bool want_psp
= threadmode
&& spsel
;
6325 if (secure
== env
->v7m
.secure
) {
6326 if (want_psp
== v7m_using_psp(env
)) {
6327 return &env
->regs
[13];
6329 return &env
->v7m
.other_sp
;
6333 return &env
->v7m
.other_ss_psp
;
6335 return &env
->v7m
.other_ss_msp
;
6340 static uint32_t arm_v7m_load_vector(ARMCPU
*cpu
, bool targets_secure
)
6342 CPUState
*cs
= CPU(cpu
);
6343 CPUARMState
*env
= &cpu
->env
;
6345 hwaddr vec
= env
->v7m
.vecbase
[targets_secure
] + env
->v7m
.exception
* 4;
6348 addr
= address_space_ldl(cs
->as
, vec
,
6349 MEMTXATTRS_UNSPECIFIED
, &result
);
6350 if (result
!= MEMTX_OK
) {
6351 /* Architecturally this should cause a HardFault setting HSFR.VECTTBL,
6352 * which would then be immediately followed by our failing to load
6353 * the entry vector for that HardFault, which is a Lockup case.
6354 * Since we don't model Lockup, we just report this guest error
6357 cpu_abort(cs
, "Failed to read from %s exception vector table "
6358 "entry %08x\n", targets_secure
? "secure" : "nonsecure",
6364 static void v7m_push_callee_stack(ARMCPU
*cpu
, uint32_t lr
, bool dotailchain
)
6366 /* For v8M, push the callee-saves register part of the stack frame.
6367 * Compare the v8M pseudocode PushCalleeStack().
6368 * In the tailchaining case this may not be the current stack.
6370 CPUARMState
*env
= &cpu
->env
;
6371 CPUState
*cs
= CPU(cpu
);
6372 uint32_t *frame_sp_p
;
6376 frame_sp_p
= get_v7m_sp_ptr(env
, true,
6377 lr
& R_V7M_EXCRET_MODE_MASK
,
6378 lr
& R_V7M_EXCRET_SPSEL_MASK
);
6380 frame_sp_p
= &env
->regs
[13];
6383 frameptr
= *frame_sp_p
- 0x28;
6385 stl_phys(cs
->as
, frameptr
, 0xfefa125b);
6386 stl_phys(cs
->as
, frameptr
+ 0x8, env
->regs
[4]);
6387 stl_phys(cs
->as
, frameptr
+ 0xc, env
->regs
[5]);
6388 stl_phys(cs
->as
, frameptr
+ 0x10, env
->regs
[6]);
6389 stl_phys(cs
->as
, frameptr
+ 0x14, env
->regs
[7]);
6390 stl_phys(cs
->as
, frameptr
+ 0x18, env
->regs
[8]);
6391 stl_phys(cs
->as
, frameptr
+ 0x1c, env
->regs
[9]);
6392 stl_phys(cs
->as
, frameptr
+ 0x20, env
->regs
[10]);
6393 stl_phys(cs
->as
, frameptr
+ 0x24, env
->regs
[11]);
6395 *frame_sp_p
= frameptr
;
6398 static void v7m_exception_taken(ARMCPU
*cpu
, uint32_t lr
, bool dotailchain
)
6400 /* Do the "take the exception" parts of exception entry,
6401 * but not the pushing of state to the stack. This is
6402 * similar to the pseudocode ExceptionTaken() function.
6404 CPUARMState
*env
= &cpu
->env
;
6406 bool targets_secure
;
6408 targets_secure
= armv7m_nvic_acknowledge_irq(env
->nvic
);
6410 if (arm_feature(env
, ARM_FEATURE_V8
)) {
6411 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
) &&
6412 (lr
& R_V7M_EXCRET_S_MASK
)) {
6413 /* The background code (the owner of the registers in the
6414 * exception frame) is Secure. This means it may either already
6415 * have or now needs to push callee-saves registers.
6417 if (targets_secure
) {
6418 if (dotailchain
&& !(lr
& R_V7M_EXCRET_ES_MASK
)) {
6419 /* We took an exception from Secure to NonSecure
6420 * (which means the callee-saved registers got stacked)
6421 * and are now tailchaining to a Secure exception.
6422 * Clear DCRS so eventual return from this Secure
6423 * exception unstacks the callee-saved registers.
6425 lr
&= ~R_V7M_EXCRET_DCRS_MASK
;
6428 /* We're going to a non-secure exception; push the
6429 * callee-saves registers to the stack now, if they're
6430 * not already saved.
6432 if (lr
& R_V7M_EXCRET_DCRS_MASK
&&
6433 !(dotailchain
&& (lr
& R_V7M_EXCRET_ES_MASK
))) {
6434 v7m_push_callee_stack(cpu
, lr
, dotailchain
);
6436 lr
|= R_V7M_EXCRET_DCRS_MASK
;
6440 lr
&= ~R_V7M_EXCRET_ES_MASK
;
6441 if (targets_secure
|| !arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
6442 lr
|= R_V7M_EXCRET_ES_MASK
;
6444 lr
&= ~R_V7M_EXCRET_SPSEL_MASK
;
6445 if (env
->v7m
.control
[targets_secure
] & R_V7M_CONTROL_SPSEL_MASK
) {
6446 lr
|= R_V7M_EXCRET_SPSEL_MASK
;
6449 /* Clear registers if necessary to prevent non-secure exception
6450 * code being able to see register values from secure code.
6451 * Where register values become architecturally UNKNOWN we leave
6452 * them with their previous values.
6454 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
6455 if (!targets_secure
) {
6456 /* Always clear the caller-saved registers (they have been
6457 * pushed to the stack earlier in v7m_push_stack()).
6458 * Clear callee-saved registers if the background code is
6459 * Secure (in which case these regs were saved in
6460 * v7m_push_callee_stack()).
6464 for (i
= 0; i
< 13; i
++) {
6465 /* r4..r11 are callee-saves, zero only if EXCRET.S == 1 */
6466 if (i
< 4 || i
> 11 || (lr
& R_V7M_EXCRET_S_MASK
)) {
6471 xpsr_write(env
, 0, XPSR_NZCV
| XPSR_Q
| XPSR_GE
| XPSR_IT
);
6476 /* Switch to target security state -- must do this before writing SPSEL */
6477 switch_v7m_security_state(env
, targets_secure
);
6478 write_v7m_control_spsel(env
, 0);
6479 arm_clear_exclusive(env
);
6481 env
->condexec_bits
= 0;
6483 addr
= arm_v7m_load_vector(cpu
, targets_secure
);
6484 env
->regs
[15] = addr
& 0xfffffffe;
6485 env
->thumb
= addr
& 1;
6488 static void v7m_push_stack(ARMCPU
*cpu
)
6490 /* Do the "set up stack frame" part of exception entry,
6491 * similar to pseudocode PushStack().
6493 CPUARMState
*env
= &cpu
->env
;
6494 uint32_t xpsr
= xpsr_read(env
);
6496 /* Align stack pointer if the guest wants that */
6497 if ((env
->regs
[13] & 4) &&
6498 (env
->v7m
.ccr
[env
->v7m
.secure
] & R_V7M_CCR_STKALIGN_MASK
)) {
6500 xpsr
|= XPSR_SPREALIGN
;
6502 /* Switch to the handler mode. */
6503 v7m_push(env
, xpsr
);
6504 v7m_push(env
, env
->regs
[15]);
6505 v7m_push(env
, env
->regs
[14]);
6506 v7m_push(env
, env
->regs
[12]);
6507 v7m_push(env
, env
->regs
[3]);
6508 v7m_push(env
, env
->regs
[2]);
6509 v7m_push(env
, env
->regs
[1]);
6510 v7m_push(env
, env
->regs
[0]);
6513 static void do_v7m_exception_exit(ARMCPU
*cpu
)
6515 CPUARMState
*env
= &cpu
->env
;
6516 CPUState
*cs
= CPU(cpu
);
6519 bool ufault
= false;
6520 bool sfault
= false;
6521 bool return_to_sp_process
;
6522 bool return_to_handler
;
6523 bool rettobase
= false;
6524 bool exc_secure
= false;
6525 bool return_to_secure
;
6527 /* If we're not in Handler mode then jumps to magic exception-exit
6528 * addresses don't have magic behaviour. However for the v8M
6529 * security extensions the magic secure-function-return has to
6530 * work in thread mode too, so to avoid doing an extra check in
6531 * the generated code we allow exception-exit magic to also cause the
6532 * internal exception and bring us here in thread mode. Correct code
6533 * will never try to do this (the following insn fetch will always
6534 * fault) so we the overhead of having taken an unnecessary exception
6537 if (!arm_v7m_is_handler_mode(env
)) {
6541 /* In the spec pseudocode ExceptionReturn() is called directly
6542 * from BXWritePC() and gets the full target PC value including
6543 * bit zero. In QEMU's implementation we treat it as a normal
6544 * jump-to-register (which is then caught later on), and so split
6545 * the target value up between env->regs[15] and env->thumb in
6546 * gen_bx(). Reconstitute it.
6548 excret
= env
->regs
[15];
6553 qemu_log_mask(CPU_LOG_INT
, "Exception return: magic PC %" PRIx32
6554 " previous exception %d\n",
6555 excret
, env
->v7m
.exception
);
6557 if ((excret
& R_V7M_EXCRET_RES1_MASK
) != R_V7M_EXCRET_RES1_MASK
) {
6558 qemu_log_mask(LOG_GUEST_ERROR
, "M profile: zero high bits in exception "
6559 "exit PC value 0x%" PRIx32
" are UNPREDICTABLE\n",
6563 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
6564 /* EXC_RETURN.ES validation check (R_SMFL). We must do this before
6565 * we pick which FAULTMASK to clear.
6567 if (!env
->v7m
.secure
&&
6568 ((excret
& R_V7M_EXCRET_ES_MASK
) ||
6569 !(excret
& R_V7M_EXCRET_DCRS_MASK
))) {
6571 /* For all other purposes, treat ES as 0 (R_HXSR) */
6572 excret
&= ~R_V7M_EXCRET_ES_MASK
;
6576 if (env
->v7m
.exception
!= ARMV7M_EXCP_NMI
) {
6577 /* Auto-clear FAULTMASK on return from other than NMI.
6578 * If the security extension is implemented then this only
6579 * happens if the raw execution priority is >= 0; the
6580 * value of the ES bit in the exception return value indicates
6581 * which security state's faultmask to clear. (v8M ARM ARM R_KBNF.)
6583 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
6584 exc_secure
= excret
& R_V7M_EXCRET_ES_MASK
;
6585 if (armv7m_nvic_raw_execution_priority(env
->nvic
) >= 0) {
6586 env
->v7m
.faultmask
[exc_secure
] = 0;
6589 env
->v7m
.faultmask
[M_REG_NS
] = 0;
6593 switch (armv7m_nvic_complete_irq(env
->nvic
, env
->v7m
.exception
,
6596 /* attempt to exit an exception that isn't active */
6600 /* still an irq active now */
6603 /* we returned to base exception level, no nesting.
6604 * (In the pseudocode this is written using "NestedActivation != 1"
6605 * where we have 'rettobase == false'.)
6610 g_assert_not_reached();
6613 return_to_handler
= !(excret
& R_V7M_EXCRET_MODE_MASK
);
6614 return_to_sp_process
= excret
& R_V7M_EXCRET_SPSEL_MASK
;
6615 return_to_secure
= arm_feature(env
, ARM_FEATURE_M_SECURITY
) &&
6616 (excret
& R_V7M_EXCRET_S_MASK
);
6618 if (arm_feature(env
, ARM_FEATURE_V8
)) {
6619 if (!arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
6620 /* UNPREDICTABLE if S == 1 or DCRS == 0 or ES == 1 (R_XLCP);
6621 * we choose to take the UsageFault.
6623 if ((excret
& R_V7M_EXCRET_S_MASK
) ||
6624 (excret
& R_V7M_EXCRET_ES_MASK
) ||
6625 !(excret
& R_V7M_EXCRET_DCRS_MASK
)) {
6629 if (excret
& R_V7M_EXCRET_RES0_MASK
) {
6633 /* For v7M we only recognize certain combinations of the low bits */
6634 switch (excret
& 0xf) {
6635 case 1: /* Return to Handler */
6637 case 13: /* Return to Thread using Process stack */
6638 case 9: /* Return to Thread using Main stack */
6639 /* We only need to check NONBASETHRDENA for v7M, because in
6640 * v8M this bit does not exist (it is RES1).
6643 !(env
->v7m
.ccr
[env
->v7m
.secure
] &
6644 R_V7M_CCR_NONBASETHRDENA_MASK
)) {
6654 env
->v7m
.sfsr
|= R_V7M_SFSR_INVER_MASK
;
6655 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
6656 v7m_exception_taken(cpu
, excret
, true);
6657 qemu_log_mask(CPU_LOG_INT
, "...taking SecureFault on existing "
6658 "stackframe: failed EXC_RETURN.ES validity check\n");
6663 /* Bad exception return: instead of popping the exception
6664 * stack, directly take a usage fault on the current stack.
6666 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
6667 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
6668 v7m_exception_taken(cpu
, excret
, true);
6669 qemu_log_mask(CPU_LOG_INT
, "...taking UsageFault on existing "
6670 "stackframe: failed exception return integrity check\n");
6674 /* Set CONTROL.SPSEL from excret.SPSEL. Since we're still in
6675 * Handler mode (and will be until we write the new XPSR.Interrupt
6676 * field) this does not switch around the current stack pointer.
6678 write_v7m_control_spsel_for_secstate(env
, return_to_sp_process
, exc_secure
);
6680 switch_v7m_security_state(env
, return_to_secure
);
6683 /* The stack pointer we should be reading the exception frame from
6684 * depends on bits in the magic exception return type value (and
6685 * for v8M isn't necessarily the stack pointer we will eventually
6686 * end up resuming execution with). Get a pointer to the location
6687 * in the CPU state struct where the SP we need is currently being
6688 * stored; we will use and modify it in place.
6689 * We use this limited C variable scope so we don't accidentally
6690 * use 'frame_sp_p' after we do something that makes it invalid.
6692 uint32_t *frame_sp_p
= get_v7m_sp_ptr(env
,
6695 return_to_sp_process
);
6696 uint32_t frameptr
= *frame_sp_p
;
6698 if (!QEMU_IS_ALIGNED(frameptr
, 8) &&
6699 arm_feature(env
, ARM_FEATURE_V8
)) {
6700 qemu_log_mask(LOG_GUEST_ERROR
,
6701 "M profile exception return with non-8-aligned SP "
6702 "for destination state is UNPREDICTABLE\n");
6705 /* Do we need to pop callee-saved registers? */
6706 if (return_to_secure
&&
6707 ((excret
& R_V7M_EXCRET_ES_MASK
) == 0 ||
6708 (excret
& R_V7M_EXCRET_DCRS_MASK
) == 0)) {
6709 uint32_t expected_sig
= 0xfefa125b;
6710 uint32_t actual_sig
= ldl_phys(cs
->as
, frameptr
);
6712 if (expected_sig
!= actual_sig
) {
6713 /* Take a SecureFault on the current stack */
6714 env
->v7m
.sfsr
|= R_V7M_SFSR_INVIS_MASK
;
6715 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
6716 v7m_exception_taken(cpu
, excret
, true);
6717 qemu_log_mask(CPU_LOG_INT
, "...taking SecureFault on existing "
6718 "stackframe: failed exception return integrity "
6719 "signature check\n");
6723 env
->regs
[4] = ldl_phys(cs
->as
, frameptr
+ 0x8);
6724 env
->regs
[5] = ldl_phys(cs
->as
, frameptr
+ 0xc);
6725 env
->regs
[6] = ldl_phys(cs
->as
, frameptr
+ 0x10);
6726 env
->regs
[7] = ldl_phys(cs
->as
, frameptr
+ 0x14);
6727 env
->regs
[8] = ldl_phys(cs
->as
, frameptr
+ 0x18);
6728 env
->regs
[9] = ldl_phys(cs
->as
, frameptr
+ 0x1c);
6729 env
->regs
[10] = ldl_phys(cs
->as
, frameptr
+ 0x20);
6730 env
->regs
[11] = ldl_phys(cs
->as
, frameptr
+ 0x24);
6735 /* Pop registers. TODO: make these accesses use the correct
6736 * attributes and address space (S/NS, priv/unpriv) and handle
6737 * memory transaction failures.
6739 env
->regs
[0] = ldl_phys(cs
->as
, frameptr
);
6740 env
->regs
[1] = ldl_phys(cs
->as
, frameptr
+ 0x4);
6741 env
->regs
[2] = ldl_phys(cs
->as
, frameptr
+ 0x8);
6742 env
->regs
[3] = ldl_phys(cs
->as
, frameptr
+ 0xc);
6743 env
->regs
[12] = ldl_phys(cs
->as
, frameptr
+ 0x10);
6744 env
->regs
[14] = ldl_phys(cs
->as
, frameptr
+ 0x14);
6745 env
->regs
[15] = ldl_phys(cs
->as
, frameptr
+ 0x18);
6747 /* Returning from an exception with a PC with bit 0 set is defined
6748 * behaviour on v8M (bit 0 is ignored), but for v7M it was specified
6749 * to be UNPREDICTABLE. In practice actual v7M hardware seems to ignore
6750 * the lsbit, and there are several RTOSes out there which incorrectly
6751 * assume the r15 in the stack frame should be a Thumb-style "lsbit
6752 * indicates ARM/Thumb" value, so ignore the bit on v7M as well, but
6753 * complain about the badly behaved guest.
6755 if (env
->regs
[15] & 1) {
6756 env
->regs
[15] &= ~1U;
6757 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
6758 qemu_log_mask(LOG_GUEST_ERROR
,
6759 "M profile return from interrupt with misaligned "
6760 "PC is UNPREDICTABLE on v7M\n");
6764 xpsr
= ldl_phys(cs
->as
, frameptr
+ 0x1c);
6766 if (arm_feature(env
, ARM_FEATURE_V8
)) {
6767 /* For v8M we have to check whether the xPSR exception field
6768 * matches the EXCRET value for return to handler/thread
6769 * before we commit to changing the SP and xPSR.
6771 bool will_be_handler
= (xpsr
& XPSR_EXCP
) != 0;
6772 if (return_to_handler
!= will_be_handler
) {
6773 /* Take an INVPC UsageFault on the current stack.
6774 * By this point we will have switched to the security state
6775 * for the background state, so this UsageFault will target
6778 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
,
6780 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
6781 v7m_exception_taken(cpu
, excret
, true);
6782 qemu_log_mask(CPU_LOG_INT
, "...taking UsageFault on existing "
6783 "stackframe: failed exception return integrity "
6789 /* Commit to consuming the stack frame */
6791 /* Undo stack alignment (the SPREALIGN bit indicates that the original
6792 * pre-exception SP was not 8-aligned and we added a padding word to
6793 * align it, so we undo this by ORing in the bit that increases it
6794 * from the current 8-aligned value to the 8-unaligned value. (Adding 4
6795 * would work too but a logical OR is how the pseudocode specifies it.)
6797 if (xpsr
& XPSR_SPREALIGN
) {
6800 *frame_sp_p
= frameptr
;
6802 /* This xpsr_write() will invalidate frame_sp_p as it may switch stack */
6803 xpsr_write(env
, xpsr
, ~XPSR_SPREALIGN
);
6805 /* The restored xPSR exception field will be zero if we're
6806 * resuming in Thread mode. If that doesn't match what the
6807 * exception return excret specified then this is a UsageFault.
6808 * v7M requires we make this check here; v8M did it earlier.
6810 if (return_to_handler
!= arm_v7m_is_handler_mode(env
)) {
6811 /* Take an INVPC UsageFault by pushing the stack again;
6812 * we know we're v7M so this is never a Secure UsageFault.
6814 assert(!arm_feature(env
, ARM_FEATURE_V8
));
6815 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, false);
6816 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
6817 v7m_push_stack(cpu
);
6818 v7m_exception_taken(cpu
, excret
, false);
6819 qemu_log_mask(CPU_LOG_INT
, "...taking UsageFault on new stackframe: "
6820 "failed exception return integrity check\n");
6824 /* Otherwise, we have a successful exception exit. */
6825 arm_clear_exclusive(env
);
6826 qemu_log_mask(CPU_LOG_INT
, "...successful exception return\n");
6829 static bool do_v7m_function_return(ARMCPU
*cpu
)
6831 /* v8M security extensions magic function return.
6833 * (1) throw an exception (longjump)
6834 * (2) return true if we successfully handled the function return
6835 * (3) return false if we failed a consistency check and have
6836 * pended a UsageFault that needs to be taken now
6838 * At this point the magic return value is split between env->regs[15]
6839 * and env->thumb. We don't bother to reconstitute it because we don't
6840 * need it (all values are handled the same way).
6842 CPUARMState
*env
= &cpu
->env
;
6843 uint32_t newpc
, newpsr
, newpsr_exc
;
6845 qemu_log_mask(CPU_LOG_INT
, "...really v7M secure function return\n");
6848 bool threadmode
, spsel
;
6851 uint32_t *frame_sp_p
;
6854 /* Pull the return address and IPSR from the Secure stack */
6855 threadmode
= !arm_v7m_is_handler_mode(env
);
6856 spsel
= env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_SPSEL_MASK
;
6858 frame_sp_p
= get_v7m_sp_ptr(env
, true, threadmode
, spsel
);
6859 frameptr
= *frame_sp_p
;
6861 /* These loads may throw an exception (for MPU faults). We want to
6862 * do them as secure, so work out what MMU index that is.
6864 mmu_idx
= arm_v7m_mmu_idx_for_secstate(env
, true);
6865 oi
= make_memop_idx(MO_LE
, arm_to_core_mmu_idx(mmu_idx
));
6866 newpc
= helper_le_ldul_mmu(env
, frameptr
, oi
, 0);
6867 newpsr
= helper_le_ldul_mmu(env
, frameptr
+ 4, oi
, 0);
6869 /* Consistency checks on new IPSR */
6870 newpsr_exc
= newpsr
& XPSR_EXCP
;
6871 if (!((env
->v7m
.exception
== 0 && newpsr_exc
== 0) ||
6872 (env
->v7m
.exception
== 1 && newpsr_exc
!= 0))) {
6873 /* Pend the fault and tell our caller to take it */
6874 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
6875 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
,
6877 qemu_log_mask(CPU_LOG_INT
,
6878 "...taking INVPC UsageFault: "
6879 "IPSR consistency check failed\n");
6883 *frame_sp_p
= frameptr
+ 8;
6886 /* This invalidates frame_sp_p */
6887 switch_v7m_security_state(env
, true);
6888 env
->v7m
.exception
= newpsr_exc
;
6889 env
->v7m
.control
[M_REG_S
] &= ~R_V7M_CONTROL_SFPA_MASK
;
6890 if (newpsr
& XPSR_SFPA
) {
6891 env
->v7m
.control
[M_REG_S
] |= R_V7M_CONTROL_SFPA_MASK
;
6893 xpsr_write(env
, 0, XPSR_IT
);
6894 env
->thumb
= newpc
& 1;
6895 env
->regs
[15] = newpc
& ~1;
6897 qemu_log_mask(CPU_LOG_INT
, "...function return successful\n");
6901 static void arm_log_exception(int idx
)
6903 if (qemu_loglevel_mask(CPU_LOG_INT
)) {
6904 const char *exc
= NULL
;
6905 static const char * const excnames
[] = {
6906 [EXCP_UDEF
] = "Undefined Instruction",
6908 [EXCP_PREFETCH_ABORT
] = "Prefetch Abort",
6909 [EXCP_DATA_ABORT
] = "Data Abort",
6912 [EXCP_BKPT
] = "Breakpoint",
6913 [EXCP_EXCEPTION_EXIT
] = "QEMU v7M exception exit",
6914 [EXCP_KERNEL_TRAP
] = "QEMU intercept of kernel commpage",
6915 [EXCP_HVC
] = "Hypervisor Call",
6916 [EXCP_HYP_TRAP
] = "Hypervisor Trap",
6917 [EXCP_SMC
] = "Secure Monitor Call",
6918 [EXCP_VIRQ
] = "Virtual IRQ",
6919 [EXCP_VFIQ
] = "Virtual FIQ",
6920 [EXCP_SEMIHOST
] = "Semihosting call",
6921 [EXCP_NOCP
] = "v7M NOCP UsageFault",
6922 [EXCP_INVSTATE
] = "v7M INVSTATE UsageFault",
6925 if (idx
>= 0 && idx
< ARRAY_SIZE(excnames
)) {
6926 exc
= excnames
[idx
];
6931 qemu_log_mask(CPU_LOG_INT
, "Taking exception %d [%s]\n", idx
, exc
);
6935 static bool v7m_read_half_insn(ARMCPU
*cpu
, ARMMMUIdx mmu_idx
,
6936 uint32_t addr
, uint16_t *insn
)
6938 /* Load a 16-bit portion of a v7M instruction, returning true on success,
6939 * or false on failure (in which case we will have pended the appropriate
6941 * We need to do the instruction fetch's MPU and SAU checks
6942 * like this because there is no MMU index that would allow
6943 * doing the load with a single function call. Instead we must
6944 * first check that the security attributes permit the load
6945 * and that they don't mismatch on the two halves of the instruction,
6946 * and then we do the load as a secure load (ie using the security
6947 * attributes of the address, not the CPU, as architecturally required).
6949 CPUState
*cs
= CPU(cpu
);
6950 CPUARMState
*env
= &cpu
->env
;
6951 V8M_SAttributes sattrs
= {};
6952 MemTxAttrs attrs
= {};
6953 ARMMMUFaultInfo fi
= {};
6955 target_ulong page_size
;
6960 v8m_security_lookup(env
, addr
, MMU_INST_FETCH
, mmu_idx
, &sattrs
);
6961 if (!sattrs
.nsc
|| sattrs
.ns
) {
6962 /* This must be the second half of the insn, and it straddles a
6963 * region boundary with the second half not being S&NSC.
6965 env
->v7m
.sfsr
|= R_V7M_SFSR_INVEP_MASK
;
6966 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
6967 qemu_log_mask(CPU_LOG_INT
,
6968 "...really SecureFault with SFSR.INVEP\n");
6971 if (get_phys_addr(env
, addr
, MMU_INST_FETCH
, mmu_idx
,
6972 &physaddr
, &attrs
, &prot
, &page_size
, &fsr
, &fi
, NULL
)) {
6973 /* the MPU lookup failed */
6974 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_IACCVIOL_MASK
;
6975 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_MEM
, env
->v7m
.secure
);
6976 qemu_log_mask(CPU_LOG_INT
, "...really MemManage with CFSR.IACCVIOL\n");
6979 *insn
= address_space_lduw_le(arm_addressspace(cs
, attrs
), physaddr
,
6981 if (txres
!= MEMTX_OK
) {
6982 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_IBUSERR_MASK
;
6983 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_BUS
, false);
6984 qemu_log_mask(CPU_LOG_INT
, "...really BusFault with CFSR.IBUSERR\n");
6990 static bool v7m_handle_execute_nsc(ARMCPU
*cpu
)
6992 /* Check whether this attempt to execute code in a Secure & NS-Callable
6993 * memory region is for an SG instruction; if so, then emulate the
6994 * effect of the SG instruction and return true. Otherwise pend
6995 * the correct kind of exception and return false.
6997 CPUARMState
*env
= &cpu
->env
;
7001 /* We should never get here unless get_phys_addr_pmsav8() caused
7002 * an exception for NS executing in S&NSC memory.
7004 assert(!env
->v7m
.secure
);
7005 assert(arm_feature(env
, ARM_FEATURE_M_SECURITY
));
7007 /* We want to do the MPU lookup as secure; work out what mmu_idx that is */
7008 mmu_idx
= arm_v7m_mmu_idx_for_secstate(env
, true);
7010 if (!v7m_read_half_insn(cpu
, mmu_idx
, env
->regs
[15], &insn
)) {
7018 if (insn
!= 0xe97f) {
7019 /* Not an SG instruction first half (we choose the IMPDEF
7020 * early-SG-check option).
7025 if (!v7m_read_half_insn(cpu
, mmu_idx
, env
->regs
[15] + 2, &insn
)) {
7029 if (insn
!= 0xe97f) {
7030 /* Not an SG instruction second half (yes, both halves of the SG
7031 * insn have the same hex value)
7036 /* OK, we have confirmed that we really have an SG instruction.
7037 * We know we're NS in S memory so don't need to repeat those checks.
7039 qemu_log_mask(CPU_LOG_INT
, "...really an SG instruction at 0x%08" PRIx32
7040 ", executing it\n", env
->regs
[15]);
7041 env
->regs
[14] &= ~1;
7042 switch_v7m_security_state(env
, true);
7043 xpsr_write(env
, 0, XPSR_IT
);
7048 env
->v7m
.sfsr
|= R_V7M_SFSR_INVEP_MASK
;
7049 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
7050 qemu_log_mask(CPU_LOG_INT
,
7051 "...really SecureFault with SFSR.INVEP\n");
7055 void arm_v7m_cpu_do_interrupt(CPUState
*cs
)
7057 ARMCPU
*cpu
= ARM_CPU(cs
);
7058 CPUARMState
*env
= &cpu
->env
;
7061 arm_log_exception(cs
->exception_index
);
7063 /* For exceptions we just mark as pending on the NVIC, and let that
7065 switch (cs
->exception_index
) {
7067 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
7068 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_UNDEFINSTR_MASK
;
7071 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
7072 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_NOCP_MASK
;
7075 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
7076 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVSTATE_MASK
;
7079 /* The PC already points to the next instruction. */
7080 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SVC
, env
->v7m
.secure
);
7082 case EXCP_PREFETCH_ABORT
:
7083 case EXCP_DATA_ABORT
:
7084 /* Note that for M profile we don't have a guest facing FSR, but
7085 * the env->exception.fsr will be populated by the code that
7086 * raises the fault, in the A profile short-descriptor format.
7088 switch (env
->exception
.fsr
& 0xf) {
7089 case M_FAKE_FSR_NSC_EXEC
:
7090 /* Exception generated when we try to execute code at an address
7091 * which is marked as Secure & Non-Secure Callable and the CPU
7092 * is in the Non-Secure state. The only instruction which can
7093 * be executed like this is SG (and that only if both halves of
7094 * the SG instruction have the same security attributes.)
7095 * Everything else must generate an INVEP SecureFault, so we
7096 * emulate the SG instruction here.
7098 if (v7m_handle_execute_nsc(cpu
)) {
7102 case M_FAKE_FSR_SFAULT
:
7103 /* Various flavours of SecureFault for attempts to execute or
7104 * access data in the wrong security state.
7106 switch (cs
->exception_index
) {
7107 case EXCP_PREFETCH_ABORT
:
7108 if (env
->v7m
.secure
) {
7109 env
->v7m
.sfsr
|= R_V7M_SFSR_INVTRAN_MASK
;
7110 qemu_log_mask(CPU_LOG_INT
,
7111 "...really SecureFault with SFSR.INVTRAN\n");
7113 env
->v7m
.sfsr
|= R_V7M_SFSR_INVEP_MASK
;
7114 qemu_log_mask(CPU_LOG_INT
,
7115 "...really SecureFault with SFSR.INVEP\n");
7118 case EXCP_DATA_ABORT
:
7119 /* This must be an NS access to S memory */
7120 env
->v7m
.sfsr
|= R_V7M_SFSR_AUVIOL_MASK
;
7121 qemu_log_mask(CPU_LOG_INT
,
7122 "...really SecureFault with SFSR.AUVIOL\n");
7125 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
7127 case 0x8: /* External Abort */
7128 switch (cs
->exception_index
) {
7129 case EXCP_PREFETCH_ABORT
:
7130 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_IBUSERR_MASK
;
7131 qemu_log_mask(CPU_LOG_INT
, "...with CFSR.IBUSERR\n");
7133 case EXCP_DATA_ABORT
:
7134 env
->v7m
.cfsr
[M_REG_NS
] |=
7135 (R_V7M_CFSR_PRECISERR_MASK
| R_V7M_CFSR_BFARVALID_MASK
);
7136 env
->v7m
.bfar
= env
->exception
.vaddress
;
7137 qemu_log_mask(CPU_LOG_INT
,
7138 "...with CFSR.PRECISERR and BFAR 0x%x\n",
7142 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_BUS
, false);
7145 /* All other FSR values are either MPU faults or "can't happen
7146 * for M profile" cases.
7148 switch (cs
->exception_index
) {
7149 case EXCP_PREFETCH_ABORT
:
7150 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_IACCVIOL_MASK
;
7151 qemu_log_mask(CPU_LOG_INT
, "...with CFSR.IACCVIOL\n");
7153 case EXCP_DATA_ABORT
:
7154 env
->v7m
.cfsr
[env
->v7m
.secure
] |=
7155 (R_V7M_CFSR_DACCVIOL_MASK
| R_V7M_CFSR_MMARVALID_MASK
);
7156 env
->v7m
.mmfar
[env
->v7m
.secure
] = env
->exception
.vaddress
;
7157 qemu_log_mask(CPU_LOG_INT
,
7158 "...with CFSR.DACCVIOL and MMFAR 0x%x\n",
7159 env
->v7m
.mmfar
[env
->v7m
.secure
]);
7162 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_MEM
,
7168 if (semihosting_enabled()) {
7170 nr
= arm_lduw_code(env
, env
->regs
[15], arm_sctlr_b(env
)) & 0xff;
7173 qemu_log_mask(CPU_LOG_INT
,
7174 "...handling as semihosting call 0x%x\n",
7176 env
->regs
[0] = do_arm_semihosting(env
);
7180 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_DEBUG
, false);
7184 case EXCP_EXCEPTION_EXIT
:
7185 if (env
->regs
[15] < EXC_RETURN_MIN_MAGIC
) {
7186 /* Must be v8M security extension function return */
7187 assert(env
->regs
[15] >= FNC_RETURN_MIN_MAGIC
);
7188 assert(arm_feature(env
, ARM_FEATURE_M_SECURITY
));
7189 if (do_v7m_function_return(cpu
)) {
7193 do_v7m_exception_exit(cpu
);
7198 cpu_abort(cs
, "Unhandled exception 0x%x\n", cs
->exception_index
);
7199 return; /* Never happens. Keep compiler happy. */
7202 if (arm_feature(env
, ARM_FEATURE_V8
)) {
7203 lr
= R_V7M_EXCRET_RES1_MASK
|
7204 R_V7M_EXCRET_DCRS_MASK
|
7205 R_V7M_EXCRET_FTYPE_MASK
;
7206 /* The S bit indicates whether we should return to Secure
7207 * or NonSecure (ie our current state).
7208 * The ES bit indicates whether we're taking this exception
7209 * to Secure or NonSecure (ie our target state). We set it
7210 * later, in v7m_exception_taken().
7211 * The SPSEL bit is also set in v7m_exception_taken() for v8M.
7212 * This corresponds to the ARM ARM pseudocode for v8M setting
7213 * some LR bits in PushStack() and some in ExceptionTaken();
7214 * the distinction matters for the tailchain cases where we
7215 * can take an exception without pushing the stack.
7217 if (env
->v7m
.secure
) {
7218 lr
|= R_V7M_EXCRET_S_MASK
;
7221 lr
= R_V7M_EXCRET_RES1_MASK
|
7222 R_V7M_EXCRET_S_MASK
|
7223 R_V7M_EXCRET_DCRS_MASK
|
7224 R_V7M_EXCRET_FTYPE_MASK
|
7225 R_V7M_EXCRET_ES_MASK
;
7226 if (env
->v7m
.control
[M_REG_NS
] & R_V7M_CONTROL_SPSEL_MASK
) {
7227 lr
|= R_V7M_EXCRET_SPSEL_MASK
;
7230 if (!arm_v7m_is_handler_mode(env
)) {
7231 lr
|= R_V7M_EXCRET_MODE_MASK
;
7234 v7m_push_stack(cpu
);
7235 v7m_exception_taken(cpu
, lr
, false);
7236 qemu_log_mask(CPU_LOG_INT
, "... as %d\n", env
->v7m
.exception
);
7239 /* Function used to synchronize QEMU's AArch64 register set with AArch32
7240 * register set. This is necessary when switching between AArch32 and AArch64
7243 void aarch64_sync_32_to_64(CPUARMState
*env
)
7246 uint32_t mode
= env
->uncached_cpsr
& CPSR_M
;
7248 /* We can blanket copy R[0:7] to X[0:7] */
7249 for (i
= 0; i
< 8; i
++) {
7250 env
->xregs
[i
] = env
->regs
[i
];
7253 /* Unless we are in FIQ mode, x8-x12 come from the user registers r8-r12.
7254 * Otherwise, they come from the banked user regs.
7256 if (mode
== ARM_CPU_MODE_FIQ
) {
7257 for (i
= 8; i
< 13; i
++) {
7258 env
->xregs
[i
] = env
->usr_regs
[i
- 8];
7261 for (i
= 8; i
< 13; i
++) {
7262 env
->xregs
[i
] = env
->regs
[i
];
7266 /* Registers x13-x23 are the various mode SP and FP registers. Registers
7267 * r13 and r14 are only copied if we are in that mode, otherwise we copy
7268 * from the mode banked register.
7270 if (mode
== ARM_CPU_MODE_USR
|| mode
== ARM_CPU_MODE_SYS
) {
7271 env
->xregs
[13] = env
->regs
[13];
7272 env
->xregs
[14] = env
->regs
[14];
7274 env
->xregs
[13] = env
->banked_r13
[bank_number(ARM_CPU_MODE_USR
)];
7275 /* HYP is an exception in that it is copied from r14 */
7276 if (mode
== ARM_CPU_MODE_HYP
) {
7277 env
->xregs
[14] = env
->regs
[14];
7279 env
->xregs
[14] = env
->banked_r14
[bank_number(ARM_CPU_MODE_USR
)];
7283 if (mode
== ARM_CPU_MODE_HYP
) {
7284 env
->xregs
[15] = env
->regs
[13];
7286 env
->xregs
[15] = env
->banked_r13
[bank_number(ARM_CPU_MODE_HYP
)];
7289 if (mode
== ARM_CPU_MODE_IRQ
) {
7290 env
->xregs
[16] = env
->regs
[14];
7291 env
->xregs
[17] = env
->regs
[13];
7293 env
->xregs
[16] = env
->banked_r14
[bank_number(ARM_CPU_MODE_IRQ
)];
7294 env
->xregs
[17] = env
->banked_r13
[bank_number(ARM_CPU_MODE_IRQ
)];
7297 if (mode
== ARM_CPU_MODE_SVC
) {
7298 env
->xregs
[18] = env
->regs
[14];
7299 env
->xregs
[19] = env
->regs
[13];
7301 env
->xregs
[18] = env
->banked_r14
[bank_number(ARM_CPU_MODE_SVC
)];
7302 env
->xregs
[19] = env
->banked_r13
[bank_number(ARM_CPU_MODE_SVC
)];
7305 if (mode
== ARM_CPU_MODE_ABT
) {
7306 env
->xregs
[20] = env
->regs
[14];
7307 env
->xregs
[21] = env
->regs
[13];
7309 env
->xregs
[20] = env
->banked_r14
[bank_number(ARM_CPU_MODE_ABT
)];
7310 env
->xregs
[21] = env
->banked_r13
[bank_number(ARM_CPU_MODE_ABT
)];
7313 if (mode
== ARM_CPU_MODE_UND
) {
7314 env
->xregs
[22] = env
->regs
[14];
7315 env
->xregs
[23] = env
->regs
[13];
7317 env
->xregs
[22] = env
->banked_r14
[bank_number(ARM_CPU_MODE_UND
)];
7318 env
->xregs
[23] = env
->banked_r13
[bank_number(ARM_CPU_MODE_UND
)];
7321 /* Registers x24-x30 are mapped to r8-r14 in FIQ mode. If we are in FIQ
7322 * mode, then we can copy from r8-r14. Otherwise, we copy from the
7323 * FIQ bank for r8-r14.
7325 if (mode
== ARM_CPU_MODE_FIQ
) {
7326 for (i
= 24; i
< 31; i
++) {
7327 env
->xregs
[i
] = env
->regs
[i
- 16]; /* X[24:30] <- R[8:14] */
7330 for (i
= 24; i
< 29; i
++) {
7331 env
->xregs
[i
] = env
->fiq_regs
[i
- 24];
7333 env
->xregs
[29] = env
->banked_r13
[bank_number(ARM_CPU_MODE_FIQ
)];
7334 env
->xregs
[30] = env
->banked_r14
[bank_number(ARM_CPU_MODE_FIQ
)];
7337 env
->pc
= env
->regs
[15];
7340 /* Function used to synchronize QEMU's AArch32 register set with AArch64
7341 * register set. This is necessary when switching between AArch32 and AArch64
7344 void aarch64_sync_64_to_32(CPUARMState
*env
)
7347 uint32_t mode
= env
->uncached_cpsr
& CPSR_M
;
7349 /* We can blanket copy X[0:7] to R[0:7] */
7350 for (i
= 0; i
< 8; i
++) {
7351 env
->regs
[i
] = env
->xregs
[i
];
7354 /* Unless we are in FIQ mode, r8-r12 come from the user registers x8-x12.
7355 * Otherwise, we copy x8-x12 into the banked user regs.
7357 if (mode
== ARM_CPU_MODE_FIQ
) {
7358 for (i
= 8; i
< 13; i
++) {
7359 env
->usr_regs
[i
- 8] = env
->xregs
[i
];
7362 for (i
= 8; i
< 13; i
++) {
7363 env
->regs
[i
] = env
->xregs
[i
];
7367 /* Registers r13 & r14 depend on the current mode.
7368 * If we are in a given mode, we copy the corresponding x registers to r13
7369 * and r14. Otherwise, we copy the x register to the banked r13 and r14
7372 if (mode
== ARM_CPU_MODE_USR
|| mode
== ARM_CPU_MODE_SYS
) {
7373 env
->regs
[13] = env
->xregs
[13];
7374 env
->regs
[14] = env
->xregs
[14];
7376 env
->banked_r13
[bank_number(ARM_CPU_MODE_USR
)] = env
->xregs
[13];
7378 /* HYP is an exception in that it does not have its own banked r14 but
7379 * shares the USR r14
7381 if (mode
== ARM_CPU_MODE_HYP
) {
7382 env
->regs
[14] = env
->xregs
[14];
7384 env
->banked_r14
[bank_number(ARM_CPU_MODE_USR
)] = env
->xregs
[14];
7388 if (mode
== ARM_CPU_MODE_HYP
) {
7389 env
->regs
[13] = env
->xregs
[15];
7391 env
->banked_r13
[bank_number(ARM_CPU_MODE_HYP
)] = env
->xregs
[15];
7394 if (mode
== ARM_CPU_MODE_IRQ
) {
7395 env
->regs
[14] = env
->xregs
[16];
7396 env
->regs
[13] = env
->xregs
[17];
7398 env
->banked_r14
[bank_number(ARM_CPU_MODE_IRQ
)] = env
->xregs
[16];
7399 env
->banked_r13
[bank_number(ARM_CPU_MODE_IRQ
)] = env
->xregs
[17];
7402 if (mode
== ARM_CPU_MODE_SVC
) {
7403 env
->regs
[14] = env
->xregs
[18];
7404 env
->regs
[13] = env
->xregs
[19];
7406 env
->banked_r14
[bank_number(ARM_CPU_MODE_SVC
)] = env
->xregs
[18];
7407 env
->banked_r13
[bank_number(ARM_CPU_MODE_SVC
)] = env
->xregs
[19];
7410 if (mode
== ARM_CPU_MODE_ABT
) {
7411 env
->regs
[14] = env
->xregs
[20];
7412 env
->regs
[13] = env
->xregs
[21];
7414 env
->banked_r14
[bank_number(ARM_CPU_MODE_ABT
)] = env
->xregs
[20];
7415 env
->banked_r13
[bank_number(ARM_CPU_MODE_ABT
)] = env
->xregs
[21];
7418 if (mode
== ARM_CPU_MODE_UND
) {
7419 env
->regs
[14] = env
->xregs
[22];
7420 env
->regs
[13] = env
->xregs
[23];
7422 env
->banked_r14
[bank_number(ARM_CPU_MODE_UND
)] = env
->xregs
[22];
7423 env
->banked_r13
[bank_number(ARM_CPU_MODE_UND
)] = env
->xregs
[23];
7426 /* Registers x24-x30 are mapped to r8-r14 in FIQ mode. If we are in FIQ
7427 * mode, then we can copy to r8-r14. Otherwise, we copy to the
7428 * FIQ bank for r8-r14.
7430 if (mode
== ARM_CPU_MODE_FIQ
) {
7431 for (i
= 24; i
< 31; i
++) {
7432 env
->regs
[i
- 16] = env
->xregs
[i
]; /* X[24:30] -> R[8:14] */
7435 for (i
= 24; i
< 29; i
++) {
7436 env
->fiq_regs
[i
- 24] = env
->xregs
[i
];
7438 env
->banked_r13
[bank_number(ARM_CPU_MODE_FIQ
)] = env
->xregs
[29];
7439 env
->banked_r14
[bank_number(ARM_CPU_MODE_FIQ
)] = env
->xregs
[30];
7442 env
->regs
[15] = env
->pc
;
7445 static void arm_cpu_do_interrupt_aarch32(CPUState
*cs
)
7447 ARMCPU
*cpu
= ARM_CPU(cs
);
7448 CPUARMState
*env
= &cpu
->env
;
7455 /* If this is a debug exception we must update the DBGDSCR.MOE bits */
7456 switch (env
->exception
.syndrome
>> ARM_EL_EC_SHIFT
) {
7458 case EC_BREAKPOINT_SAME_EL
:
7462 case EC_WATCHPOINT_SAME_EL
:
7468 case EC_VECTORCATCH
:
7477 env
->cp15
.mdscr_el1
= deposit64(env
->cp15
.mdscr_el1
, 2, 4, moe
);
7480 /* TODO: Vectored interrupt controller. */
7481 switch (cs
->exception_index
) {
7483 new_mode
= ARM_CPU_MODE_UND
;
7492 new_mode
= ARM_CPU_MODE_SVC
;
7495 /* The PC already points to the next instruction. */
7499 env
->exception
.fsr
= 2;
7500 /* Fall through to prefetch abort. */
7501 case EXCP_PREFETCH_ABORT
:
7502 A32_BANKED_CURRENT_REG_SET(env
, ifsr
, env
->exception
.fsr
);
7503 A32_BANKED_CURRENT_REG_SET(env
, ifar
, env
->exception
.vaddress
);
7504 qemu_log_mask(CPU_LOG_INT
, "...with IFSR 0x%x IFAR 0x%x\n",
7505 env
->exception
.fsr
, (uint32_t)env
->exception
.vaddress
);
7506 new_mode
= ARM_CPU_MODE_ABT
;
7508 mask
= CPSR_A
| CPSR_I
;
7511 case EXCP_DATA_ABORT
:
7512 A32_BANKED_CURRENT_REG_SET(env
, dfsr
, env
->exception
.fsr
);
7513 A32_BANKED_CURRENT_REG_SET(env
, dfar
, env
->exception
.vaddress
);
7514 qemu_log_mask(CPU_LOG_INT
, "...with DFSR 0x%x DFAR 0x%x\n",
7516 (uint32_t)env
->exception
.vaddress
);
7517 new_mode
= ARM_CPU_MODE_ABT
;
7519 mask
= CPSR_A
| CPSR_I
;
7523 new_mode
= ARM_CPU_MODE_IRQ
;
7525 /* Disable IRQ and imprecise data aborts. */
7526 mask
= CPSR_A
| CPSR_I
;
7528 if (env
->cp15
.scr_el3
& SCR_IRQ
) {
7529 /* IRQ routed to monitor mode */
7530 new_mode
= ARM_CPU_MODE_MON
;
7535 new_mode
= ARM_CPU_MODE_FIQ
;
7537 /* Disable FIQ, IRQ and imprecise data aborts. */
7538 mask
= CPSR_A
| CPSR_I
| CPSR_F
;
7539 if (env
->cp15
.scr_el3
& SCR_FIQ
) {
7540 /* FIQ routed to monitor mode */
7541 new_mode
= ARM_CPU_MODE_MON
;
7546 new_mode
= ARM_CPU_MODE_IRQ
;
7548 /* Disable IRQ and imprecise data aborts. */
7549 mask
= CPSR_A
| CPSR_I
;
7553 new_mode
= ARM_CPU_MODE_FIQ
;
7555 /* Disable FIQ, IRQ and imprecise data aborts. */
7556 mask
= CPSR_A
| CPSR_I
| CPSR_F
;
7560 new_mode
= ARM_CPU_MODE_MON
;
7562 mask
= CPSR_A
| CPSR_I
| CPSR_F
;
7566 cpu_abort(cs
, "Unhandled exception 0x%x\n", cs
->exception_index
);
7567 return; /* Never happens. Keep compiler happy. */
7570 if (new_mode
== ARM_CPU_MODE_MON
) {
7571 addr
+= env
->cp15
.mvbar
;
7572 } else if (A32_BANKED_CURRENT_REG_GET(env
, sctlr
) & SCTLR_V
) {
7573 /* High vectors. When enabled, base address cannot be remapped. */
7576 /* ARM v7 architectures provide a vector base address register to remap
7577 * the interrupt vector table.
7578 * This register is only followed in non-monitor mode, and is banked.
7579 * Note: only bits 31:5 are valid.
7581 addr
+= A32_BANKED_CURRENT_REG_GET(env
, vbar
);
7584 if ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_MON
) {
7585 env
->cp15
.scr_el3
&= ~SCR_NS
;
7588 switch_mode (env
, new_mode
);
7589 /* For exceptions taken to AArch32 we must clear the SS bit in both
7590 * PSTATE and in the old-state value we save to SPSR_<mode>, so zero it now.
7592 env
->uncached_cpsr
&= ~PSTATE_SS
;
7593 env
->spsr
= cpsr_read(env
);
7594 /* Clear IT bits. */
7595 env
->condexec_bits
= 0;
7596 /* Switch to the new mode, and to the correct instruction set. */
7597 env
->uncached_cpsr
= (env
->uncached_cpsr
& ~CPSR_M
) | new_mode
;
7598 /* Set new mode endianness */
7599 env
->uncached_cpsr
&= ~CPSR_E
;
7600 if (env
->cp15
.sctlr_el
[arm_current_el(env
)] & SCTLR_EE
) {
7601 env
->uncached_cpsr
|= CPSR_E
;
7604 /* this is a lie, as the was no c1_sys on V4T/V5, but who cares
7605 * and we should just guard the thumb mode on V4 */
7606 if (arm_feature(env
, ARM_FEATURE_V4T
)) {
7607 env
->thumb
= (A32_BANKED_CURRENT_REG_GET(env
, sctlr
) & SCTLR_TE
) != 0;
7609 env
->regs
[14] = env
->regs
[15] + offset
;
7610 env
->regs
[15] = addr
;
7613 /* Handle exception entry to a target EL which is using AArch64 */
7614 static void arm_cpu_do_interrupt_aarch64(CPUState
*cs
)
7616 ARMCPU
*cpu
= ARM_CPU(cs
);
7617 CPUARMState
*env
= &cpu
->env
;
7618 unsigned int new_el
= env
->exception
.target_el
;
7619 target_ulong addr
= env
->cp15
.vbar_el
[new_el
];
7620 unsigned int new_mode
= aarch64_pstate_mode(new_el
, true);
7622 if (arm_current_el(env
) < new_el
) {
7623 /* Entry vector offset depends on whether the implemented EL
7624 * immediately lower than the target level is using AArch32 or AArch64
7630 is_aa64
= (env
->cp15
.scr_el3
& SCR_RW
) != 0;
7633 is_aa64
= (env
->cp15
.hcr_el2
& HCR_RW
) != 0;
7636 is_aa64
= is_a64(env
);
7639 g_assert_not_reached();
7647 } else if (pstate_read(env
) & PSTATE_SP
) {
7651 switch (cs
->exception_index
) {
7652 case EXCP_PREFETCH_ABORT
:
7653 case EXCP_DATA_ABORT
:
7654 env
->cp15
.far_el
[new_el
] = env
->exception
.vaddress
;
7655 qemu_log_mask(CPU_LOG_INT
, "...with FAR 0x%" PRIx64
"\n",
7656 env
->cp15
.far_el
[new_el
]);
7664 env
->cp15
.esr_el
[new_el
] = env
->exception
.syndrome
;
7675 qemu_log_mask(CPU_LOG_INT
,
7676 "...handling as semihosting call 0x%" PRIx64
"\n",
7678 env
->xregs
[0] = do_arm_semihosting(env
);
7681 cpu_abort(cs
, "Unhandled exception 0x%x\n", cs
->exception_index
);
7685 env
->banked_spsr
[aarch64_banked_spsr_index(new_el
)] = pstate_read(env
);
7686 aarch64_save_sp(env
, arm_current_el(env
));
7687 env
->elr_el
[new_el
] = env
->pc
;
7689 env
->banked_spsr
[aarch64_banked_spsr_index(new_el
)] = cpsr_read(env
);
7690 env
->elr_el
[new_el
] = env
->regs
[15];
7692 aarch64_sync_32_to_64(env
);
7694 env
->condexec_bits
= 0;
7696 qemu_log_mask(CPU_LOG_INT
, "...with ELR 0x%" PRIx64
"\n",
7697 env
->elr_el
[new_el
]);
7699 pstate_write(env
, PSTATE_DAIF
| new_mode
);
7701 aarch64_restore_sp(env
, new_el
);
7705 qemu_log_mask(CPU_LOG_INT
, "...to EL%d PC 0x%" PRIx64
" PSTATE 0x%x\n",
7706 new_el
, env
->pc
, pstate_read(env
));
7709 static inline bool check_for_semihosting(CPUState
*cs
)
7711 /* Check whether this exception is a semihosting call; if so
7712 * then handle it and return true; otherwise return false.
7714 ARMCPU
*cpu
= ARM_CPU(cs
);
7715 CPUARMState
*env
= &cpu
->env
;
7718 if (cs
->exception_index
== EXCP_SEMIHOST
) {
7719 /* This is always the 64-bit semihosting exception.
7720 * The "is this usermode" and "is semihosting enabled"
7721 * checks have been done at translate time.
7723 qemu_log_mask(CPU_LOG_INT
,
7724 "...handling as semihosting call 0x%" PRIx64
"\n",
7726 env
->xregs
[0] = do_arm_semihosting(env
);
7733 /* Only intercept calls from privileged modes, to provide some
7734 * semblance of security.
7736 if (cs
->exception_index
!= EXCP_SEMIHOST
&&
7737 (!semihosting_enabled() ||
7738 ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_USR
))) {
7742 switch (cs
->exception_index
) {
7744 /* This is always a semihosting call; the "is this usermode"
7745 * and "is semihosting enabled" checks have been done at
7750 /* Check for semihosting interrupt. */
7752 imm
= arm_lduw_code(env
, env
->regs
[15] - 2, arm_sctlr_b(env
))
7758 imm
= arm_ldl_code(env
, env
->regs
[15] - 4, arm_sctlr_b(env
))
7760 if (imm
== 0x123456) {
7766 /* See if this is a semihosting syscall. */
7768 imm
= arm_lduw_code(env
, env
->regs
[15], arm_sctlr_b(env
))
7780 qemu_log_mask(CPU_LOG_INT
,
7781 "...handling as semihosting call 0x%x\n",
7783 env
->regs
[0] = do_arm_semihosting(env
);
7788 /* Handle a CPU exception for A and R profile CPUs.
7789 * Do any appropriate logging, handle PSCI calls, and then hand off
7790 * to the AArch64-entry or AArch32-entry function depending on the
7791 * target exception level's register width.
7793 void arm_cpu_do_interrupt(CPUState
*cs
)
7795 ARMCPU
*cpu
= ARM_CPU(cs
);
7796 CPUARMState
*env
= &cpu
->env
;
7797 unsigned int new_el
= env
->exception
.target_el
;
7799 assert(!arm_feature(env
, ARM_FEATURE_M
));
7801 arm_log_exception(cs
->exception_index
);
7802 qemu_log_mask(CPU_LOG_INT
, "...from EL%d to EL%d\n", arm_current_el(env
),
7804 if (qemu_loglevel_mask(CPU_LOG_INT
)
7805 && !excp_is_internal(cs
->exception_index
)) {
7806 qemu_log_mask(CPU_LOG_INT
, "...with ESR 0x%x/0x%" PRIx32
"\n",
7807 env
->exception
.syndrome
>> ARM_EL_EC_SHIFT
,
7808 env
->exception
.syndrome
);
7811 if (arm_is_psci_call(cpu
, cs
->exception_index
)) {
7812 arm_handle_psci_call(cpu
);
7813 qemu_log_mask(CPU_LOG_INT
, "...handled as PSCI call\n");
7817 /* Semihosting semantics depend on the register width of the
7818 * code that caused the exception, not the target exception level,
7819 * so must be handled here.
7821 if (check_for_semihosting(cs
)) {
7825 assert(!excp_is_internal(cs
->exception_index
));
7826 if (arm_el_is_aa64(env
, new_el
)) {
7827 arm_cpu_do_interrupt_aarch64(cs
);
7829 arm_cpu_do_interrupt_aarch32(cs
);
7832 /* Hooks may change global state so BQL should be held, also the
7833 * BQL needs to be held for any modification of
7834 * cs->interrupt_request.
7836 g_assert(qemu_mutex_iothread_locked());
7838 arm_call_el_change_hook(cpu
);
7840 if (!kvm_enabled()) {
7841 cs
->interrupt_request
|= CPU_INTERRUPT_EXITTB
;
7845 /* Return the exception level which controls this address translation regime */
7846 static inline uint32_t regime_el(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
7849 case ARMMMUIdx_S2NS
:
7850 case ARMMMUIdx_S1E2
:
7852 case ARMMMUIdx_S1E3
:
7854 case ARMMMUIdx_S1SE0
:
7855 return arm_el_is_aa64(env
, 3) ? 1 : 3;
7856 case ARMMMUIdx_S1SE1
:
7857 case ARMMMUIdx_S1NSE0
:
7858 case ARMMMUIdx_S1NSE1
:
7859 case ARMMMUIdx_MPriv
:
7860 case ARMMMUIdx_MNegPri
:
7861 case ARMMMUIdx_MUser
:
7862 case ARMMMUIdx_MSPriv
:
7863 case ARMMMUIdx_MSNegPri
:
7864 case ARMMMUIdx_MSUser
:
7867 g_assert_not_reached();
7871 /* Return the SCTLR value which controls this address translation regime */
7872 static inline uint32_t regime_sctlr(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
7874 return env
->cp15
.sctlr_el
[regime_el(env
, mmu_idx
)];
7877 /* Return true if the specified stage of address translation is disabled */
7878 static inline bool regime_translation_disabled(CPUARMState
*env
,
7881 if (arm_feature(env
, ARM_FEATURE_M
)) {
7882 switch (env
->v7m
.mpu_ctrl
[regime_is_secure(env
, mmu_idx
)] &
7883 (R_V7M_MPU_CTRL_ENABLE_MASK
| R_V7M_MPU_CTRL_HFNMIENA_MASK
)) {
7884 case R_V7M_MPU_CTRL_ENABLE_MASK
:
7885 /* Enabled, but not for HardFault and NMI */
7886 return mmu_idx
== ARMMMUIdx_MNegPri
||
7887 mmu_idx
== ARMMMUIdx_MSNegPri
;
7888 case R_V7M_MPU_CTRL_ENABLE_MASK
| R_V7M_MPU_CTRL_HFNMIENA_MASK
:
7889 /* Enabled for all cases */
7893 /* HFNMIENA set and ENABLE clear is UNPREDICTABLE, but
7894 * we warned about that in armv7m_nvic.c when the guest set it.
7900 if (mmu_idx
== ARMMMUIdx_S2NS
) {
7901 return (env
->cp15
.hcr_el2
& HCR_VM
) == 0;
7903 return (regime_sctlr(env
, mmu_idx
) & SCTLR_M
) == 0;
7906 static inline bool regime_translation_big_endian(CPUARMState
*env
,
7909 return (regime_sctlr(env
, mmu_idx
) & SCTLR_EE
) != 0;
7912 /* Return the TCR controlling this translation regime */
7913 static inline TCR
*regime_tcr(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
7915 if (mmu_idx
== ARMMMUIdx_S2NS
) {
7916 return &env
->cp15
.vtcr_el2
;
7918 return &env
->cp15
.tcr_el
[regime_el(env
, mmu_idx
)];
7921 /* Convert a possible stage1+2 MMU index into the appropriate
7924 static inline ARMMMUIdx
stage_1_mmu_idx(ARMMMUIdx mmu_idx
)
7926 if (mmu_idx
== ARMMMUIdx_S12NSE0
|| mmu_idx
== ARMMMUIdx_S12NSE1
) {
7927 mmu_idx
+= (ARMMMUIdx_S1NSE0
- ARMMMUIdx_S12NSE0
);
7932 /* Returns TBI0 value for current regime el */
7933 uint32_t arm_regime_tbi0(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
7938 /* For EL0 and EL1, TBI is controlled by stage 1's TCR, so convert
7939 * a stage 1+2 mmu index into the appropriate stage 1 mmu index.
7941 mmu_idx
= stage_1_mmu_idx(mmu_idx
);
7943 tcr
= regime_tcr(env
, mmu_idx
);
7944 el
= regime_el(env
, mmu_idx
);
7947 return extract64(tcr
->raw_tcr
, 20, 1);
7949 return extract64(tcr
->raw_tcr
, 37, 1);
7953 /* Returns TBI1 value for current regime el */
7954 uint32_t arm_regime_tbi1(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
7959 /* For EL0 and EL1, TBI is controlled by stage 1's TCR, so convert
7960 * a stage 1+2 mmu index into the appropriate stage 1 mmu index.
7962 mmu_idx
= stage_1_mmu_idx(mmu_idx
);
7964 tcr
= regime_tcr(env
, mmu_idx
);
7965 el
= regime_el(env
, mmu_idx
);
7970 return extract64(tcr
->raw_tcr
, 38, 1);
7974 /* Return the TTBR associated with this translation regime */
7975 static inline uint64_t regime_ttbr(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
7978 if (mmu_idx
== ARMMMUIdx_S2NS
) {
7979 return env
->cp15
.vttbr_el2
;
7982 return env
->cp15
.ttbr0_el
[regime_el(env
, mmu_idx
)];
7984 return env
->cp15
.ttbr1_el
[regime_el(env
, mmu_idx
)];
7988 /* Return true if the translation regime is using LPAE format page tables */
7989 static inline bool regime_using_lpae_format(CPUARMState
*env
,
7992 int el
= regime_el(env
, mmu_idx
);
7993 if (el
== 2 || arm_el_is_aa64(env
, el
)) {
7996 if (arm_feature(env
, ARM_FEATURE_LPAE
)
7997 && (regime_tcr(env
, mmu_idx
)->raw_tcr
& TTBCR_EAE
)) {
8003 /* Returns true if the stage 1 translation regime is using LPAE format page
8004 * tables. Used when raising alignment exceptions, whose FSR changes depending
8005 * on whether the long or short descriptor format is in use. */
8006 bool arm_s1_regime_using_lpae_format(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
8008 mmu_idx
= stage_1_mmu_idx(mmu_idx
);
8010 return regime_using_lpae_format(env
, mmu_idx
);
8013 static inline bool regime_is_user(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
8016 case ARMMMUIdx_S1SE0
:
8017 case ARMMMUIdx_S1NSE0
:
8018 case ARMMMUIdx_MUser
:
8022 case ARMMMUIdx_S12NSE0
:
8023 case ARMMMUIdx_S12NSE1
:
8024 g_assert_not_reached();
8028 /* Translate section/page access permissions to page
8029 * R/W protection flags
8032 * @mmu_idx: MMU index indicating required translation regime
8033 * @ap: The 3-bit access permissions (AP[2:0])
8034 * @domain_prot: The 2-bit domain access permissions
8036 static inline int ap_to_rw_prot(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
8037 int ap
, int domain_prot
)
8039 bool is_user
= regime_is_user(env
, mmu_idx
);
8041 if (domain_prot
== 3) {
8042 return PAGE_READ
| PAGE_WRITE
;
8047 if (arm_feature(env
, ARM_FEATURE_V7
)) {
8050 switch (regime_sctlr(env
, mmu_idx
) & (SCTLR_S
| SCTLR_R
)) {
8052 return is_user
? 0 : PAGE_READ
;
8059 return is_user
? 0 : PAGE_READ
| PAGE_WRITE
;
8064 return PAGE_READ
| PAGE_WRITE
;
8067 return PAGE_READ
| PAGE_WRITE
;
8068 case 4: /* Reserved. */
8071 return is_user
? 0 : PAGE_READ
;
8075 if (!arm_feature(env
, ARM_FEATURE_V6K
)) {
8080 g_assert_not_reached();
8084 /* Translate section/page access permissions to page
8085 * R/W protection flags.
8087 * @ap: The 2-bit simple AP (AP[2:1])
8088 * @is_user: TRUE if accessing from PL0
8090 static inline int simple_ap_to_rw_prot_is_user(int ap
, bool is_user
)
8094 return is_user
? 0 : PAGE_READ
| PAGE_WRITE
;
8096 return PAGE_READ
| PAGE_WRITE
;
8098 return is_user
? 0 : PAGE_READ
;
8102 g_assert_not_reached();
8107 simple_ap_to_rw_prot(CPUARMState
*env
, ARMMMUIdx mmu_idx
, int ap
)
8109 return simple_ap_to_rw_prot_is_user(ap
, regime_is_user(env
, mmu_idx
));
8112 /* Translate S2 section/page access permissions to protection flags
8115 * @s2ap: The 2-bit stage2 access permissions (S2AP)
8116 * @xn: XN (execute-never) bit
8118 static int get_S2prot(CPUARMState
*env
, int s2ap
, int xn
)
8129 if (arm_el_is_aa64(env
, 2) || prot
& PAGE_READ
) {
8136 /* Translate section/page access permissions to protection flags
8139 * @mmu_idx: MMU index indicating required translation regime
8140 * @is_aa64: TRUE if AArch64
8141 * @ap: The 2-bit simple AP (AP[2:1])
8142 * @ns: NS (non-secure) bit
8143 * @xn: XN (execute-never) bit
8144 * @pxn: PXN (privileged execute-never) bit
8146 static int get_S1prot(CPUARMState
*env
, ARMMMUIdx mmu_idx
, bool is_aa64
,
8147 int ap
, int ns
, int xn
, int pxn
)
8149 bool is_user
= regime_is_user(env
, mmu_idx
);
8150 int prot_rw
, user_rw
;
8154 assert(mmu_idx
!= ARMMMUIdx_S2NS
);
8156 user_rw
= simple_ap_to_rw_prot_is_user(ap
, true);
8160 prot_rw
= simple_ap_to_rw_prot_is_user(ap
, false);
8163 if (ns
&& arm_is_secure(env
) && (env
->cp15
.scr_el3
& SCR_SIF
)) {
8167 /* TODO have_wxn should be replaced with
8168 * ARM_FEATURE_V8 || (ARM_FEATURE_V7 && ARM_FEATURE_EL2)
8169 * when ARM_FEATURE_EL2 starts getting set. For now we assume all LPAE
8170 * compatible processors have EL2, which is required for [U]WXN.
8172 have_wxn
= arm_feature(env
, ARM_FEATURE_LPAE
);
8175 wxn
= regime_sctlr(env
, mmu_idx
) & SCTLR_WXN
;
8179 switch (regime_el(env
, mmu_idx
)) {
8182 xn
= pxn
|| (user_rw
& PAGE_WRITE
);
8189 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
8190 switch (regime_el(env
, mmu_idx
)) {
8194 xn
= xn
|| !(user_rw
& PAGE_READ
);
8198 uwxn
= regime_sctlr(env
, mmu_idx
) & SCTLR_UWXN
;
8200 xn
= xn
|| !(prot_rw
& PAGE_READ
) || pxn
||
8201 (uwxn
&& (user_rw
& PAGE_WRITE
));
8211 if (xn
|| (wxn
&& (prot_rw
& PAGE_WRITE
))) {
8214 return prot_rw
| PAGE_EXEC
;
8217 static bool get_level1_table_address(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
8218 uint32_t *table
, uint32_t address
)
8220 /* Note that we can only get here for an AArch32 PL0/PL1 lookup */
8221 TCR
*tcr
= regime_tcr(env
, mmu_idx
);
8223 if (address
& tcr
->mask
) {
8224 if (tcr
->raw_tcr
& TTBCR_PD1
) {
8225 /* Translation table walk disabled for TTBR1 */
8228 *table
= regime_ttbr(env
, mmu_idx
, 1) & 0xffffc000;
8230 if (tcr
->raw_tcr
& TTBCR_PD0
) {
8231 /* Translation table walk disabled for TTBR0 */
8234 *table
= regime_ttbr(env
, mmu_idx
, 0) & tcr
->base_mask
;
8236 *table
|= (address
>> 18) & 0x3ffc;
8240 /* Translate a S1 pagetable walk through S2 if needed. */
8241 static hwaddr
S1_ptw_translate(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
8242 hwaddr addr
, MemTxAttrs txattrs
,
8244 ARMMMUFaultInfo
*fi
)
8246 if ((mmu_idx
== ARMMMUIdx_S1NSE0
|| mmu_idx
== ARMMMUIdx_S1NSE1
) &&
8247 !regime_translation_disabled(env
, ARMMMUIdx_S2NS
)) {
8248 target_ulong s2size
;
8253 ret
= get_phys_addr_lpae(env
, addr
, 0, ARMMMUIdx_S2NS
, &s2pa
,
8254 &txattrs
, &s2prot
, &s2size
, fsr
, fi
, NULL
);
8266 /* All loads done in the course of a page table walk go through here.
8267 * TODO: rather than ignoring errors from physical memory reads (which
8268 * are external aborts in ARM terminology) we should propagate this
8269 * error out so that we can turn it into a Data Abort if this walk
8270 * was being done for a CPU load/store or an address translation instruction
8271 * (but not if it was for a debug access).
8273 static uint32_t arm_ldl_ptw(CPUState
*cs
, hwaddr addr
, bool is_secure
,
8274 ARMMMUIdx mmu_idx
, uint32_t *fsr
,
8275 ARMMMUFaultInfo
*fi
)
8277 ARMCPU
*cpu
= ARM_CPU(cs
);
8278 CPUARMState
*env
= &cpu
->env
;
8279 MemTxAttrs attrs
= {};
8282 attrs
.secure
= is_secure
;
8283 as
= arm_addressspace(cs
, attrs
);
8284 addr
= S1_ptw_translate(env
, mmu_idx
, addr
, attrs
, fsr
, fi
);
8288 if (regime_translation_big_endian(env
, mmu_idx
)) {
8289 return address_space_ldl_be(as
, addr
, attrs
, NULL
);
8291 return address_space_ldl_le(as
, addr
, attrs
, NULL
);
8295 static uint64_t arm_ldq_ptw(CPUState
*cs
, hwaddr addr
, bool is_secure
,
8296 ARMMMUIdx mmu_idx
, uint32_t *fsr
,
8297 ARMMMUFaultInfo
*fi
)
8299 ARMCPU
*cpu
= ARM_CPU(cs
);
8300 CPUARMState
*env
= &cpu
->env
;
8301 MemTxAttrs attrs
= {};
8304 attrs
.secure
= is_secure
;
8305 as
= arm_addressspace(cs
, attrs
);
8306 addr
= S1_ptw_translate(env
, mmu_idx
, addr
, attrs
, fsr
, fi
);
8310 if (regime_translation_big_endian(env
, mmu_idx
)) {
8311 return address_space_ldq_be(as
, addr
, attrs
, NULL
);
8313 return address_space_ldq_le(as
, addr
, attrs
, NULL
);
8317 static bool get_phys_addr_v5(CPUARMState
*env
, uint32_t address
,
8318 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
8319 hwaddr
*phys_ptr
, int *prot
,
8320 target_ulong
*page_size
, uint32_t *fsr
,
8321 ARMMMUFaultInfo
*fi
)
8323 CPUState
*cs
= CPU(arm_env_get_cpu(env
));
8334 /* Pagetable walk. */
8335 /* Lookup l1 descriptor. */
8336 if (!get_level1_table_address(env
, mmu_idx
, &table
, address
)) {
8337 /* Section translation fault if page walk is disabled by PD0 or PD1 */
8341 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
8344 domain
= (desc
>> 5) & 0x0f;
8345 if (regime_el(env
, mmu_idx
) == 1) {
8346 dacr
= env
->cp15
.dacr_ns
;
8348 dacr
= env
->cp15
.dacr_s
;
8350 domain_prot
= (dacr
>> (domain
* 2)) & 3;
8352 /* Section translation fault. */
8356 if (domain_prot
== 0 || domain_prot
== 2) {
8358 code
= 9; /* Section domain fault. */
8360 code
= 11; /* Page domain fault. */
8365 phys_addr
= (desc
& 0xfff00000) | (address
& 0x000fffff);
8366 ap
= (desc
>> 10) & 3;
8368 *page_size
= 1024 * 1024;
8370 /* Lookup l2 entry. */
8372 /* Coarse pagetable. */
8373 table
= (desc
& 0xfffffc00) | ((address
>> 10) & 0x3fc);
8375 /* Fine pagetable. */
8376 table
= (desc
& 0xfffff000) | ((address
>> 8) & 0xffc);
8378 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
8381 case 0: /* Page translation fault. */
8384 case 1: /* 64k page. */
8385 phys_addr
= (desc
& 0xffff0000) | (address
& 0xffff);
8386 ap
= (desc
>> (4 + ((address
>> 13) & 6))) & 3;
8387 *page_size
= 0x10000;
8389 case 2: /* 4k page. */
8390 phys_addr
= (desc
& 0xfffff000) | (address
& 0xfff);
8391 ap
= (desc
>> (4 + ((address
>> 9) & 6))) & 3;
8392 *page_size
= 0x1000;
8394 case 3: /* 1k page, or ARMv6/XScale "extended small (4k) page" */
8396 /* ARMv6/XScale extended small page format */
8397 if (arm_feature(env
, ARM_FEATURE_XSCALE
)
8398 || arm_feature(env
, ARM_FEATURE_V6
)) {
8399 phys_addr
= (desc
& 0xfffff000) | (address
& 0xfff);
8400 *page_size
= 0x1000;
8402 /* UNPREDICTABLE in ARMv5; we choose to take a
8403 * page translation fault.
8409 phys_addr
= (desc
& 0xfffffc00) | (address
& 0x3ff);
8412 ap
= (desc
>> 4) & 3;
8415 /* Never happens, but compiler isn't smart enough to tell. */
8420 *prot
= ap_to_rw_prot(env
, mmu_idx
, ap
, domain_prot
);
8421 *prot
|= *prot
? PAGE_EXEC
: 0;
8422 if (!(*prot
& (1 << access_type
))) {
8423 /* Access permission fault. */
8426 *phys_ptr
= phys_addr
;
8429 *fsr
= code
| (domain
<< 4);
8433 static bool get_phys_addr_v6(CPUARMState
*env
, uint32_t address
,
8434 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
8435 hwaddr
*phys_ptr
, MemTxAttrs
*attrs
, int *prot
,
8436 target_ulong
*page_size
, uint32_t *fsr
,
8437 ARMMMUFaultInfo
*fi
)
8439 CPUState
*cs
= CPU(arm_env_get_cpu(env
));
8453 /* Pagetable walk. */
8454 /* Lookup l1 descriptor. */
8455 if (!get_level1_table_address(env
, mmu_idx
, &table
, address
)) {
8456 /* Section translation fault if page walk is disabled by PD0 or PD1 */
8460 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
8463 if (type
== 0 || (type
== 3 && !arm_feature(env
, ARM_FEATURE_PXN
))) {
8464 /* Section translation fault, or attempt to use the encoding
8465 * which is Reserved on implementations without PXN.
8470 if ((type
== 1) || !(desc
& (1 << 18))) {
8471 /* Page or Section. */
8472 domain
= (desc
>> 5) & 0x0f;
8474 if (regime_el(env
, mmu_idx
) == 1) {
8475 dacr
= env
->cp15
.dacr_ns
;
8477 dacr
= env
->cp15
.dacr_s
;
8479 domain_prot
= (dacr
>> (domain
* 2)) & 3;
8480 if (domain_prot
== 0 || domain_prot
== 2) {
8482 code
= 9; /* Section domain fault. */
8484 code
= 11; /* Page domain fault. */
8489 if (desc
& (1 << 18)) {
8491 phys_addr
= (desc
& 0xff000000) | (address
& 0x00ffffff);
8492 phys_addr
|= (uint64_t)extract32(desc
, 20, 4) << 32;
8493 phys_addr
|= (uint64_t)extract32(desc
, 5, 4) << 36;
8494 *page_size
= 0x1000000;
8497 phys_addr
= (desc
& 0xfff00000) | (address
& 0x000fffff);
8498 *page_size
= 0x100000;
8500 ap
= ((desc
>> 10) & 3) | ((desc
>> 13) & 4);
8501 xn
= desc
& (1 << 4);
8504 ns
= extract32(desc
, 19, 1);
8506 if (arm_feature(env
, ARM_FEATURE_PXN
)) {
8507 pxn
= (desc
>> 2) & 1;
8509 ns
= extract32(desc
, 3, 1);
8510 /* Lookup l2 entry. */
8511 table
= (desc
& 0xfffffc00) | ((address
>> 10) & 0x3fc);
8512 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
8514 ap
= ((desc
>> 4) & 3) | ((desc
>> 7) & 4);
8516 case 0: /* Page translation fault. */
8519 case 1: /* 64k page. */
8520 phys_addr
= (desc
& 0xffff0000) | (address
& 0xffff);
8521 xn
= desc
& (1 << 15);
8522 *page_size
= 0x10000;
8524 case 2: case 3: /* 4k page. */
8525 phys_addr
= (desc
& 0xfffff000) | (address
& 0xfff);
8527 *page_size
= 0x1000;
8530 /* Never happens, but compiler isn't smart enough to tell. */
8535 if (domain_prot
== 3) {
8536 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
8538 if (pxn
&& !regime_is_user(env
, mmu_idx
)) {
8541 if (xn
&& access_type
== MMU_INST_FETCH
)
8544 if (arm_feature(env
, ARM_FEATURE_V6K
) &&
8545 (regime_sctlr(env
, mmu_idx
) & SCTLR_AFE
)) {
8546 /* The simplified model uses AP[0] as an access control bit. */
8547 if ((ap
& 1) == 0) {
8548 /* Access flag fault. */
8549 code
= (code
== 15) ? 6 : 3;
8552 *prot
= simple_ap_to_rw_prot(env
, mmu_idx
, ap
>> 1);
8554 *prot
= ap_to_rw_prot(env
, mmu_idx
, ap
, domain_prot
);
8559 if (!(*prot
& (1 << access_type
))) {
8560 /* Access permission fault. */
8565 /* The NS bit will (as required by the architecture) have no effect if
8566 * the CPU doesn't support TZ or this is a non-secure translation
8567 * regime, because the attribute will already be non-secure.
8569 attrs
->secure
= false;
8571 *phys_ptr
= phys_addr
;
8574 *fsr
= code
| (domain
<< 4);
8578 /* Fault type for long-descriptor MMU fault reporting; this corresponds
8579 * to bits [5..2] in the STATUS field in long-format DFSR/IFSR.
8582 translation_fault
= 1,
8584 permission_fault
= 3,
8588 * check_s2_mmu_setup
8590 * @is_aa64: True if the translation regime is in AArch64 state
8591 * @startlevel: Suggested starting level
8592 * @inputsize: Bitsize of IPAs
8593 * @stride: Page-table stride (See the ARM ARM)
8595 * Returns true if the suggested S2 translation parameters are OK and
8598 static bool check_s2_mmu_setup(ARMCPU
*cpu
, bool is_aa64
, int level
,
8599 int inputsize
, int stride
)
8601 const int grainsize
= stride
+ 3;
8604 /* Negative levels are never allowed. */
8609 startsizecheck
= inputsize
- ((3 - level
) * stride
+ grainsize
);
8610 if (startsizecheck
< 1 || startsizecheck
> stride
+ 4) {
8615 CPUARMState
*env
= &cpu
->env
;
8616 unsigned int pamax
= arm_pamax(cpu
);
8619 case 13: /* 64KB Pages. */
8620 if (level
== 0 || (level
== 1 && pamax
<= 42)) {
8624 case 11: /* 16KB Pages. */
8625 if (level
== 0 || (level
== 1 && pamax
<= 40)) {
8629 case 9: /* 4KB Pages. */
8630 if (level
== 0 && pamax
<= 42) {
8635 g_assert_not_reached();
8638 /* Inputsize checks. */
8639 if (inputsize
> pamax
&&
8640 (arm_el_is_aa64(env
, 1) || inputsize
> 40)) {
8641 /* This is CONSTRAINED UNPREDICTABLE and we choose to fault. */
8645 /* AArch32 only supports 4KB pages. Assert on that. */
8646 assert(stride
== 9);
8655 /* Translate from the 4-bit stage 2 representation of
8656 * memory attributes (without cache-allocation hints) to
8657 * the 8-bit representation of the stage 1 MAIR registers
8658 * (which includes allocation hints).
8660 * ref: shared/translation/attrs/S2AttrDecode()
8661 * .../S2ConvertAttrsHints()
8663 static uint8_t convert_stage2_attrs(CPUARMState
*env
, uint8_t s2attrs
)
8665 uint8_t hiattr
= extract32(s2attrs
, 2, 2);
8666 uint8_t loattr
= extract32(s2attrs
, 0, 2);
8667 uint8_t hihint
= 0, lohint
= 0;
8669 if (hiattr
!= 0) { /* normal memory */
8670 if ((env
->cp15
.hcr_el2
& HCR_CD
) != 0) { /* cache disabled */
8671 hiattr
= loattr
= 1; /* non-cacheable */
8673 if (hiattr
!= 1) { /* Write-through or write-back */
8674 hihint
= 3; /* RW allocate */
8676 if (loattr
!= 1) { /* Write-through or write-back */
8677 lohint
= 3; /* RW allocate */
8682 return (hiattr
<< 6) | (hihint
<< 4) | (loattr
<< 2) | lohint
;
8685 static bool get_phys_addr_lpae(CPUARMState
*env
, target_ulong address
,
8686 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
8687 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
, int *prot
,
8688 target_ulong
*page_size_ptr
, uint32_t *fsr
,
8689 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
)
8691 ARMCPU
*cpu
= arm_env_get_cpu(env
);
8692 CPUState
*cs
= CPU(cpu
);
8693 /* Read an LPAE long-descriptor translation table. */
8694 MMUFaultType fault_type
= translation_fault
;
8701 hwaddr descaddr
, indexmask
, indexmask_grainsize
;
8702 uint32_t tableattrs
;
8703 target_ulong page_size
;
8709 TCR
*tcr
= regime_tcr(env
, mmu_idx
);
8710 int ap
, ns
, xn
, pxn
;
8711 uint32_t el
= regime_el(env
, mmu_idx
);
8712 bool ttbr1_valid
= true;
8713 uint64_t descaddrmask
;
8714 bool aarch64
= arm_el_is_aa64(env
, el
);
8717 * This code does not handle the different format TCR for VTCR_EL2.
8718 * This code also does not support shareability levels.
8719 * Attribute and permission bit handling should also be checked when adding
8720 * support for those page table walks.
8726 if (mmu_idx
!= ARMMMUIdx_S2NS
) {
8727 tbi
= extract64(tcr
->raw_tcr
, 20, 1);
8730 if (extract64(address
, 55, 1)) {
8731 tbi
= extract64(tcr
->raw_tcr
, 38, 1);
8733 tbi
= extract64(tcr
->raw_tcr
, 37, 1);
8738 /* If we are in 64-bit EL2 or EL3 then there is no TTBR1, so mark it
8742 ttbr1_valid
= false;
8747 /* There is no TTBR1 for EL2 */
8749 ttbr1_valid
= false;
8753 /* Determine whether this address is in the region controlled by
8754 * TTBR0 or TTBR1 (or if it is in neither region and should fault).
8755 * This is a Non-secure PL0/1 stage 1 translation, so controlled by
8756 * TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32:
8759 /* AArch64 translation. */
8760 t0sz
= extract32(tcr
->raw_tcr
, 0, 6);
8761 t0sz
= MIN(t0sz
, 39);
8762 t0sz
= MAX(t0sz
, 16);
8763 } else if (mmu_idx
!= ARMMMUIdx_S2NS
) {
8764 /* AArch32 stage 1 translation. */
8765 t0sz
= extract32(tcr
->raw_tcr
, 0, 3);
8767 /* AArch32 stage 2 translation. */
8768 bool sext
= extract32(tcr
->raw_tcr
, 4, 1);
8769 bool sign
= extract32(tcr
->raw_tcr
, 3, 1);
8770 /* Address size is 40-bit for a stage 2 translation,
8771 * and t0sz can be negative (from -8 to 7),
8772 * so we need to adjust it to use the TTBR selecting logic below.
8775 t0sz
= sextract32(tcr
->raw_tcr
, 0, 4) + 8;
8777 /* If the sign-extend bit is not the same as t0sz[3], the result
8778 * is unpredictable. Flag this as a guest error. */
8780 qemu_log_mask(LOG_GUEST_ERROR
,
8781 "AArch32: VTCR.S / VTCR.T0SZ[3] mismatch\n");
8784 t1sz
= extract32(tcr
->raw_tcr
, 16, 6);
8786 t1sz
= MIN(t1sz
, 39);
8787 t1sz
= MAX(t1sz
, 16);
8789 if (t0sz
&& !extract64(address
, addrsize
- t0sz
, t0sz
- tbi
)) {
8790 /* there is a ttbr0 region and we are in it (high bits all zero) */
8792 } else if (ttbr1_valid
&& t1sz
&&
8793 !extract64(~address
, addrsize
- t1sz
, t1sz
- tbi
)) {
8794 /* there is a ttbr1 region and we are in it (high bits all one) */
8797 /* ttbr0 region is "everything not in the ttbr1 region" */
8799 } else if (!t1sz
&& ttbr1_valid
) {
8800 /* ttbr1 region is "everything not in the ttbr0 region" */
8803 /* in the gap between the two regions, this is a Translation fault */
8804 fault_type
= translation_fault
;
8808 /* Note that QEMU ignores shareability and cacheability attributes,
8809 * so we don't need to do anything with the SH, ORGN, IRGN fields
8810 * in the TTBCR. Similarly, TTBCR:A1 selects whether we get the
8811 * ASID from TTBR0 or TTBR1, but QEMU's TLB doesn't currently
8812 * implement any ASID-like capability so we can ignore it (instead
8813 * we will always flush the TLB any time the ASID is changed).
8815 if (ttbr_select
== 0) {
8816 ttbr
= regime_ttbr(env
, mmu_idx
, 0);
8818 epd
= extract32(tcr
->raw_tcr
, 7, 1);
8820 inputsize
= addrsize
- t0sz
;
8822 tg
= extract32(tcr
->raw_tcr
, 14, 2);
8823 if (tg
== 1) { /* 64KB pages */
8826 if (tg
== 2) { /* 16KB pages */
8830 /* We should only be here if TTBR1 is valid */
8831 assert(ttbr1_valid
);
8833 ttbr
= regime_ttbr(env
, mmu_idx
, 1);
8834 epd
= extract32(tcr
->raw_tcr
, 23, 1);
8835 inputsize
= addrsize
- t1sz
;
8837 tg
= extract32(tcr
->raw_tcr
, 30, 2);
8838 if (tg
== 3) { /* 64KB pages */
8841 if (tg
== 1) { /* 16KB pages */
8846 /* Here we should have set up all the parameters for the translation:
8847 * inputsize, ttbr, epd, stride, tbi
8851 /* Translation table walk disabled => Translation fault on TLB miss
8852 * Note: This is always 0 on 64-bit EL2 and EL3.
8857 if (mmu_idx
!= ARMMMUIdx_S2NS
) {
8858 /* The starting level depends on the virtual address size (which can
8859 * be up to 48 bits) and the translation granule size. It indicates
8860 * the number of strides (stride bits at a time) needed to
8861 * consume the bits of the input address. In the pseudocode this is:
8862 * level = 4 - RoundUp((inputsize - grainsize) / stride)
8863 * where their 'inputsize' is our 'inputsize', 'grainsize' is
8864 * our 'stride + 3' and 'stride' is our 'stride'.
8865 * Applying the usual "rounded up m/n is (m+n-1)/n" and simplifying:
8866 * = 4 - (inputsize - stride - 3 + stride - 1) / stride
8867 * = 4 - (inputsize - 4) / stride;
8869 level
= 4 - (inputsize
- 4) / stride
;
8871 /* For stage 2 translations the starting level is specified by the
8872 * VTCR_EL2.SL0 field (whose interpretation depends on the page size)
8874 uint32_t sl0
= extract32(tcr
->raw_tcr
, 6, 2);
8875 uint32_t startlevel
;
8878 if (!aarch64
|| stride
== 9) {
8879 /* AArch32 or 4KB pages */
8880 startlevel
= 2 - sl0
;
8882 /* 16KB or 64KB pages */
8883 startlevel
= 3 - sl0
;
8886 /* Check that the starting level is valid. */
8887 ok
= check_s2_mmu_setup(cpu
, aarch64
, startlevel
,
8890 fault_type
= translation_fault
;
8896 indexmask_grainsize
= (1ULL << (stride
+ 3)) - 1;
8897 indexmask
= (1ULL << (inputsize
- (stride
* (4 - level
)))) - 1;
8899 /* Now we can extract the actual base address from the TTBR */
8900 descaddr
= extract64(ttbr
, 0, 48);
8901 descaddr
&= ~indexmask
;
8903 /* The address field in the descriptor goes up to bit 39 for ARMv7
8904 * but up to bit 47 for ARMv8, but we use the descaddrmask
8905 * up to bit 39 for AArch32, because we don't need other bits in that case
8906 * to construct next descriptor address (anyway they should be all zeroes).
8908 descaddrmask
= ((1ull << (aarch64
? 48 : 40)) - 1) &
8909 ~indexmask_grainsize
;
8911 /* Secure accesses start with the page table in secure memory and
8912 * can be downgraded to non-secure at any step. Non-secure accesses
8913 * remain non-secure. We implement this by just ORing in the NSTable/NS
8914 * bits at each step.
8916 tableattrs
= regime_is_secure(env
, mmu_idx
) ? 0 : (1 << 4);
8918 uint64_t descriptor
;
8921 descaddr
|= (address
>> (stride
* (4 - level
))) & indexmask
;
8923 nstable
= extract32(tableattrs
, 4, 1);
8924 descriptor
= arm_ldq_ptw(cs
, descaddr
, !nstable
, mmu_idx
, fsr
, fi
);
8929 if (!(descriptor
& 1) ||
8930 (!(descriptor
& 2) && (level
== 3))) {
8931 /* Invalid, or the Reserved level 3 encoding */
8934 descaddr
= descriptor
& descaddrmask
;
8936 if ((descriptor
& 2) && (level
< 3)) {
8937 /* Table entry. The top five bits are attributes which may
8938 * propagate down through lower levels of the table (and
8939 * which are all arranged so that 0 means "no effect", so
8940 * we can gather them up by ORing in the bits at each level).
8942 tableattrs
|= extract64(descriptor
, 59, 5);
8944 indexmask
= indexmask_grainsize
;
8947 /* Block entry at level 1 or 2, or page entry at level 3.
8948 * These are basically the same thing, although the number
8949 * of bits we pull in from the vaddr varies.
8951 page_size
= (1ULL << ((stride
* (4 - level
)) + 3));
8952 descaddr
|= (address
& (page_size
- 1));
8953 /* Extract attributes from the descriptor */
8954 attrs
= extract64(descriptor
, 2, 10)
8955 | (extract64(descriptor
, 52, 12) << 10);
8957 if (mmu_idx
== ARMMMUIdx_S2NS
) {
8958 /* Stage 2 table descriptors do not include any attribute fields */
8961 /* Merge in attributes from table descriptors */
8962 attrs
|= extract32(tableattrs
, 0, 2) << 11; /* XN, PXN */
8963 attrs
|= extract32(tableattrs
, 3, 1) << 5; /* APTable[1] => AP[2] */
8964 /* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1
8965 * means "force PL1 access only", which means forcing AP[1] to 0.
8967 if (extract32(tableattrs
, 2, 1)) {
8970 attrs
|= nstable
<< 3; /* NS */
8973 /* Here descaddr is the final physical address, and attributes
8976 fault_type
= access_fault
;
8977 if ((attrs
& (1 << 8)) == 0) {
8982 ap
= extract32(attrs
, 4, 2);
8983 xn
= extract32(attrs
, 12, 1);
8985 if (mmu_idx
== ARMMMUIdx_S2NS
) {
8987 *prot
= get_S2prot(env
, ap
, xn
);
8989 ns
= extract32(attrs
, 3, 1);
8990 pxn
= extract32(attrs
, 11, 1);
8991 *prot
= get_S1prot(env
, mmu_idx
, aarch64
, ap
, ns
, xn
, pxn
);
8994 fault_type
= permission_fault
;
8995 if (!(*prot
& (1 << access_type
))) {
9000 /* The NS bit will (as required by the architecture) have no effect if
9001 * the CPU doesn't support TZ or this is a non-secure translation
9002 * regime, because the attribute will already be non-secure.
9004 txattrs
->secure
= false;
9007 if (cacheattrs
!= NULL
) {
9008 if (mmu_idx
== ARMMMUIdx_S2NS
) {
9009 cacheattrs
->attrs
= convert_stage2_attrs(env
,
9010 extract32(attrs
, 0, 4));
9012 /* Index into MAIR registers for cache attributes */
9013 uint8_t attrindx
= extract32(attrs
, 0, 3);
9014 uint64_t mair
= env
->cp15
.mair_el
[regime_el(env
, mmu_idx
)];
9015 assert(attrindx
<= 7);
9016 cacheattrs
->attrs
= extract64(mair
, attrindx
* 8, 8);
9018 cacheattrs
->shareability
= extract32(attrs
, 6, 2);
9021 *phys_ptr
= descaddr
;
9022 *page_size_ptr
= page_size
;
9026 /* Long-descriptor format IFSR/DFSR value */
9027 *fsr
= (1 << 9) | (fault_type
<< 2) | level
;
9028 /* Tag the error as S2 for failed S1 PTW at S2 or ordinary S2. */
9029 fi
->stage2
= fi
->s1ptw
|| (mmu_idx
== ARMMMUIdx_S2NS
);
9033 static inline void get_phys_addr_pmsav7_default(CPUARMState
*env
,
9035 int32_t address
, int *prot
)
9037 if (!arm_feature(env
, ARM_FEATURE_M
)) {
9038 *prot
= PAGE_READ
| PAGE_WRITE
;
9040 case 0xF0000000 ... 0xFFFFFFFF:
9041 if (regime_sctlr(env
, mmu_idx
) & SCTLR_V
) {
9042 /* hivecs execing is ok */
9046 case 0x00000000 ... 0x7FFFFFFF:
9051 /* Default system address map for M profile cores.
9052 * The architecture specifies which regions are execute-never;
9053 * at the MPU level no other checks are defined.
9056 case 0x00000000 ... 0x1fffffff: /* ROM */
9057 case 0x20000000 ... 0x3fffffff: /* SRAM */
9058 case 0x60000000 ... 0x7fffffff: /* RAM */
9059 case 0x80000000 ... 0x9fffffff: /* RAM */
9060 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
9062 case 0x40000000 ... 0x5fffffff: /* Peripheral */
9063 case 0xa0000000 ... 0xbfffffff: /* Device */
9064 case 0xc0000000 ... 0xdfffffff: /* Device */
9065 case 0xe0000000 ... 0xffffffff: /* System */
9066 *prot
= PAGE_READ
| PAGE_WRITE
;
9069 g_assert_not_reached();
9074 static bool pmsav7_use_background_region(ARMCPU
*cpu
,
9075 ARMMMUIdx mmu_idx
, bool is_user
)
9077 /* Return true if we should use the default memory map as a
9078 * "background" region if there are no hits against any MPU regions.
9080 CPUARMState
*env
= &cpu
->env
;
9086 if (arm_feature(env
, ARM_FEATURE_M
)) {
9087 return env
->v7m
.mpu_ctrl
[regime_is_secure(env
, mmu_idx
)]
9088 & R_V7M_MPU_CTRL_PRIVDEFENA_MASK
;
9090 return regime_sctlr(env
, mmu_idx
) & SCTLR_BR
;
9094 static inline bool m_is_ppb_region(CPUARMState
*env
, uint32_t address
)
9096 /* True if address is in the M profile PPB region 0xe0000000 - 0xe00fffff */
9097 return arm_feature(env
, ARM_FEATURE_M
) &&
9098 extract32(address
, 20, 12) == 0xe00;
9101 static inline bool m_is_system_region(CPUARMState
*env
, uint32_t address
)
9103 /* True if address is in the M profile system region
9104 * 0xe0000000 - 0xffffffff
9106 return arm_feature(env
, ARM_FEATURE_M
) && extract32(address
, 29, 3) == 0x7;
9109 static bool get_phys_addr_pmsav7(CPUARMState
*env
, uint32_t address
,
9110 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
9111 hwaddr
*phys_ptr
, int *prot
, uint32_t *fsr
)
9113 ARMCPU
*cpu
= arm_env_get_cpu(env
);
9115 bool is_user
= regime_is_user(env
, mmu_idx
);
9117 *phys_ptr
= address
;
9120 if (regime_translation_disabled(env
, mmu_idx
) ||
9121 m_is_ppb_region(env
, address
)) {
9122 /* MPU disabled or M profile PPB access: use default memory map.
9123 * The other case which uses the default memory map in the
9124 * v7M ARM ARM pseudocode is exception vector reads from the vector
9125 * table. In QEMU those accesses are done in arm_v7m_load_vector(),
9126 * which always does a direct read using address_space_ldl(), rather
9127 * than going via this function, so we don't need to check that here.
9129 get_phys_addr_pmsav7_default(env
, mmu_idx
, address
, prot
);
9130 } else { /* MPU enabled */
9131 for (n
= (int)cpu
->pmsav7_dregion
- 1; n
>= 0; n
--) {
9133 uint32_t base
= env
->pmsav7
.drbar
[n
];
9134 uint32_t rsize
= extract32(env
->pmsav7
.drsr
[n
], 1, 5);
9138 if (!(env
->pmsav7
.drsr
[n
] & 0x1)) {
9143 qemu_log_mask(LOG_GUEST_ERROR
,
9144 "DRSR[%d]: Rsize field cannot be 0\n", n
);
9148 rmask
= (1ull << rsize
) - 1;
9151 qemu_log_mask(LOG_GUEST_ERROR
,
9152 "DRBAR[%d]: 0x%" PRIx32
" misaligned "
9153 "to DRSR region size, mask = 0x%" PRIx32
"\n",
9158 if (address
< base
|| address
> base
+ rmask
) {
9162 /* Region matched */
9164 if (rsize
>= 8) { /* no subregions for regions < 256 bytes */
9166 uint32_t srdis_mask
;
9168 rsize
-= 3; /* sub region size (power of 2) */
9169 snd
= ((address
- base
) >> rsize
) & 0x7;
9170 srdis
= extract32(env
->pmsav7
.drsr
[n
], snd
+ 8, 1);
9172 srdis_mask
= srdis
? 0x3 : 0x0;
9173 for (i
= 2; i
<= 8 && rsize
< TARGET_PAGE_BITS
; i
*= 2) {
9174 /* This will check in groups of 2, 4 and then 8, whether
9175 * the subregion bits are consistent. rsize is incremented
9176 * back up to give the region size, considering consistent
9177 * adjacent subregions as one region. Stop testing if rsize
9178 * is already big enough for an entire QEMU page.
9180 int snd_rounded
= snd
& ~(i
- 1);
9181 uint32_t srdis_multi
= extract32(env
->pmsav7
.drsr
[n
],
9182 snd_rounded
+ 8, i
);
9183 if (srdis_mask
^ srdis_multi
) {
9186 srdis_mask
= (srdis_mask
<< i
) | srdis_mask
;
9190 if (rsize
< TARGET_PAGE_BITS
) {
9191 qemu_log_mask(LOG_UNIMP
,
9192 "DRSR[%d]: No support for MPU (sub)region "
9193 "alignment of %" PRIu32
" bits. Minimum is %d\n",
9194 n
, rsize
, TARGET_PAGE_BITS
);
9203 if (n
== -1) { /* no hits */
9204 if (!pmsav7_use_background_region(cpu
, mmu_idx
, is_user
)) {
9205 /* background fault */
9209 get_phys_addr_pmsav7_default(env
, mmu_idx
, address
, prot
);
9210 } else { /* a MPU hit! */
9211 uint32_t ap
= extract32(env
->pmsav7
.dracr
[n
], 8, 3);
9212 uint32_t xn
= extract32(env
->pmsav7
.dracr
[n
], 12, 1);
9214 if (m_is_system_region(env
, address
)) {
9215 /* System space is always execute never */
9219 if (is_user
) { /* User mode AP bit decoding */
9224 break; /* no access */
9226 *prot
|= PAGE_WRITE
;
9230 *prot
|= PAGE_READ
| PAGE_EXEC
;
9233 qemu_log_mask(LOG_GUEST_ERROR
,
9234 "DRACR[%d]: Bad value for AP bits: 0x%"
9235 PRIx32
"\n", n
, ap
);
9237 } else { /* Priv. mode AP bits decoding */
9240 break; /* no access */
9244 *prot
|= PAGE_WRITE
;
9248 *prot
|= PAGE_READ
| PAGE_EXEC
;
9251 qemu_log_mask(LOG_GUEST_ERROR
,
9252 "DRACR[%d]: Bad value for AP bits: 0x%"
9253 PRIx32
"\n", n
, ap
);
9259 *prot
&= ~PAGE_EXEC
;
9264 *fsr
= 0x00d; /* Permission fault */
9265 return !(*prot
& (1 << access_type
));
9268 static bool v8m_is_sau_exempt(CPUARMState
*env
,
9269 uint32_t address
, MMUAccessType access_type
)
9271 /* The architecture specifies that certain address ranges are
9272 * exempt from v8M SAU/IDAU checks.
9275 (access_type
== MMU_INST_FETCH
&& m_is_system_region(env
, address
)) ||
9276 (address
>= 0xe0000000 && address
<= 0xe0002fff) ||
9277 (address
>= 0xe000e000 && address
<= 0xe000efff) ||
9278 (address
>= 0xe002e000 && address
<= 0xe002efff) ||
9279 (address
>= 0xe0040000 && address
<= 0xe0041fff) ||
9280 (address
>= 0xe00ff000 && address
<= 0xe00fffff);
9283 static void v8m_security_lookup(CPUARMState
*env
, uint32_t address
,
9284 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
9285 V8M_SAttributes
*sattrs
)
9287 /* Look up the security attributes for this address. Compare the
9288 * pseudocode SecurityCheck() function.
9289 * We assume the caller has zero-initialized *sattrs.
9291 ARMCPU
*cpu
= arm_env_get_cpu(env
);
9294 /* TODO: implement IDAU */
9296 if (access_type
== MMU_INST_FETCH
&& extract32(address
, 28, 4) == 0xf) {
9297 /* 0xf0000000..0xffffffff is always S for insn fetches */
9301 if (v8m_is_sau_exempt(env
, address
, access_type
)) {
9302 sattrs
->ns
= !regime_is_secure(env
, mmu_idx
);
9306 switch (env
->sau
.ctrl
& 3) {
9307 case 0: /* SAU.ENABLE == 0, SAU.ALLNS == 0 */
9309 case 2: /* SAU.ENABLE == 0, SAU.ALLNS == 1 */
9312 default: /* SAU.ENABLE == 1 */
9313 for (r
= 0; r
< cpu
->sau_sregion
; r
++) {
9314 if (env
->sau
.rlar
[r
] & 1) {
9315 uint32_t base
= env
->sau
.rbar
[r
] & ~0x1f;
9316 uint32_t limit
= env
->sau
.rlar
[r
] | 0x1f;
9318 if (base
<= address
&& limit
>= address
) {
9319 if (sattrs
->srvalid
) {
9320 /* If we hit in more than one region then we must report
9321 * as Secure, not NS-Callable, with no valid region
9325 sattrs
->nsc
= false;
9326 sattrs
->sregion
= 0;
9327 sattrs
->srvalid
= false;
9330 if (env
->sau
.rlar
[r
] & 2) {
9335 sattrs
->srvalid
= true;
9336 sattrs
->sregion
= r
;
9342 /* TODO when we support the IDAU then it may override the result here */
9347 static bool get_phys_addr_pmsav8(CPUARMState
*env
, uint32_t address
,
9348 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
9349 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
,
9350 int *prot
, uint32_t *fsr
)
9352 ARMCPU
*cpu
= arm_env_get_cpu(env
);
9353 bool is_user
= regime_is_user(env
, mmu_idx
);
9354 uint32_t secure
= regime_is_secure(env
, mmu_idx
);
9356 int matchregion
= -1;
9358 V8M_SAttributes sattrs
= {};
9360 *phys_ptr
= address
;
9363 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
9364 v8m_security_lookup(env
, address
, access_type
, mmu_idx
, &sattrs
);
9365 if (access_type
== MMU_INST_FETCH
) {
9366 /* Instruction fetches always use the MMU bank and the
9367 * transaction attribute determined by the fetch address,
9368 * regardless of CPU state. This is painful for QEMU
9369 * to handle, because it would mean we need to encode
9370 * into the mmu_idx not just the (user, negpri) information
9371 * for the current security state but also that for the
9372 * other security state, which would balloon the number
9373 * of mmu_idx values needed alarmingly.
9374 * Fortunately we can avoid this because it's not actually
9375 * possible to arbitrarily execute code from memory with
9376 * the wrong security attribute: it will always generate
9377 * an exception of some kind or another, apart from the
9378 * special case of an NS CPU executing an SG instruction
9379 * in S&NSC memory. So we always just fail the translation
9380 * here and sort things out in the exception handler
9381 * (including possibly emulating an SG instruction).
9383 if (sattrs
.ns
!= !secure
) {
9384 *fsr
= sattrs
.nsc
? M_FAKE_FSR_NSC_EXEC
: M_FAKE_FSR_SFAULT
;
9388 /* For data accesses we always use the MMU bank indicated
9389 * by the current CPU state, but the security attributes
9390 * might downgrade a secure access to nonsecure.
9393 txattrs
->secure
= false;
9394 } else if (!secure
) {
9395 /* NS access to S memory must fault.
9396 * Architecturally we should first check whether the
9397 * MPU information for this address indicates that we
9398 * are doing an unaligned access to Device memory, which
9399 * should generate a UsageFault instead. QEMU does not
9400 * currently check for that kind of unaligned access though.
9401 * If we added it we would need to do so as a special case
9402 * for M_FAKE_FSR_SFAULT in arm_v7m_cpu_do_interrupt().
9404 *fsr
= M_FAKE_FSR_SFAULT
;
9410 /* Unlike the ARM ARM pseudocode, we don't need to check whether this
9411 * was an exception vector read from the vector table (which is always
9412 * done using the default system address map), because those accesses
9413 * are done in arm_v7m_load_vector(), which always does a direct
9414 * read using address_space_ldl(), rather than going via this function.
9416 if (regime_translation_disabled(env
, mmu_idx
)) { /* MPU disabled */
9418 } else if (m_is_ppb_region(env
, address
)) {
9420 } else if (pmsav7_use_background_region(cpu
, mmu_idx
, is_user
)) {
9423 for (n
= (int)cpu
->pmsav7_dregion
- 1; n
>= 0; n
--) {
9425 /* Note that the base address is bits [31:5] from the register
9426 * with bits [4:0] all zeroes, but the limit address is bits
9427 * [31:5] from the register with bits [4:0] all ones.
9429 uint32_t base
= env
->pmsav8
.rbar
[secure
][n
] & ~0x1f;
9430 uint32_t limit
= env
->pmsav8
.rlar
[secure
][n
] | 0x1f;
9432 if (!(env
->pmsav8
.rlar
[secure
][n
] & 0x1)) {
9433 /* Region disabled */
9437 if (address
< base
|| address
> limit
) {
9442 /* Multiple regions match -- always a failure (unlike
9443 * PMSAv7 where highest-numbered-region wins)
9445 *fsr
= 0x00d; /* permission fault */
9452 if (base
& ~TARGET_PAGE_MASK
) {
9453 qemu_log_mask(LOG_UNIMP
,
9454 "MPU_RBAR[%d]: No support for MPU region base"
9455 "address of 0x%" PRIx32
". Minimum alignment is "
9457 n
, base
, TARGET_PAGE_BITS
);
9460 if ((limit
+ 1) & ~TARGET_PAGE_MASK
) {
9461 qemu_log_mask(LOG_UNIMP
,
9462 "MPU_RBAR[%d]: No support for MPU region limit"
9463 "address of 0x%" PRIx32
". Minimum alignment is "
9465 n
, limit
, TARGET_PAGE_BITS
);
9472 /* background fault */
9477 if (matchregion
== -1) {
9478 /* hit using the background region */
9479 get_phys_addr_pmsav7_default(env
, mmu_idx
, address
, prot
);
9481 uint32_t ap
= extract32(env
->pmsav8
.rbar
[secure
][matchregion
], 1, 2);
9482 uint32_t xn
= extract32(env
->pmsav8
.rbar
[secure
][matchregion
], 0, 1);
9484 if (m_is_system_region(env
, address
)) {
9485 /* System space is always execute never */
9489 *prot
= simple_ap_to_rw_prot(env
, mmu_idx
, ap
);
9493 /* We don't need to look the attribute up in the MAIR0/MAIR1
9494 * registers because that only tells us about cacheability.
9498 *fsr
= 0x00d; /* Permission fault */
9499 return !(*prot
& (1 << access_type
));
9502 static bool get_phys_addr_pmsav5(CPUARMState
*env
, uint32_t address
,
9503 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
9504 hwaddr
*phys_ptr
, int *prot
, uint32_t *fsr
)
9509 bool is_user
= regime_is_user(env
, mmu_idx
);
9511 if (regime_translation_disabled(env
, mmu_idx
)) {
9513 *phys_ptr
= address
;
9514 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
9518 *phys_ptr
= address
;
9519 for (n
= 7; n
>= 0; n
--) {
9520 base
= env
->cp15
.c6_region
[n
];
9521 if ((base
& 1) == 0) {
9524 mask
= 1 << ((base
>> 1) & 0x1f);
9525 /* Keep this shift separate from the above to avoid an
9526 (undefined) << 32. */
9527 mask
= (mask
<< 1) - 1;
9528 if (((base
^ address
) & ~mask
) == 0) {
9537 if (access_type
== MMU_INST_FETCH
) {
9538 mask
= env
->cp15
.pmsav5_insn_ap
;
9540 mask
= env
->cp15
.pmsav5_data_ap
;
9542 mask
= (mask
>> (n
* 4)) & 0xf;
9552 *prot
= PAGE_READ
| PAGE_WRITE
;
9557 *prot
|= PAGE_WRITE
;
9561 *prot
= PAGE_READ
| PAGE_WRITE
;
9574 /* Bad permission. */
9582 /* Combine either inner or outer cacheability attributes for normal
9583 * memory, according to table D4-42 and pseudocode procedure
9584 * CombineS1S2AttrHints() of ARM DDI 0487B.b (the ARMv8 ARM).
9586 * NB: only stage 1 includes allocation hints (RW bits), leading to
9589 static uint8_t combine_cacheattr_nibble(uint8_t s1
, uint8_t s2
)
9591 if (s1
== 4 || s2
== 4) {
9592 /* non-cacheable has precedence */
9594 } else if (extract32(s1
, 2, 2) == 0 || extract32(s1
, 2, 2) == 2) {
9595 /* stage 1 write-through takes precedence */
9597 } else if (extract32(s2
, 2, 2) == 2) {
9598 /* stage 2 write-through takes precedence, but the allocation hint
9599 * is still taken from stage 1
9601 return (2 << 2) | extract32(s1
, 0, 2);
9602 } else { /* write-back */
9607 /* Combine S1 and S2 cacheability/shareability attributes, per D4.5.4
9608 * and CombineS1S2Desc()
9610 * @s1: Attributes from stage 1 walk
9611 * @s2: Attributes from stage 2 walk
9613 static ARMCacheAttrs
combine_cacheattrs(ARMCacheAttrs s1
, ARMCacheAttrs s2
)
9615 uint8_t s1lo
= extract32(s1
.attrs
, 0, 4), s2lo
= extract32(s2
.attrs
, 0, 4);
9616 uint8_t s1hi
= extract32(s1
.attrs
, 4, 4), s2hi
= extract32(s2
.attrs
, 4, 4);
9619 /* Combine shareability attributes (table D4-43) */
9620 if (s1
.shareability
== 2 || s2
.shareability
== 2) {
9621 /* if either are outer-shareable, the result is outer-shareable */
9622 ret
.shareability
= 2;
9623 } else if (s1
.shareability
== 3 || s2
.shareability
== 3) {
9624 /* if either are inner-shareable, the result is inner-shareable */
9625 ret
.shareability
= 3;
9627 /* both non-shareable */
9628 ret
.shareability
= 0;
9631 /* Combine memory type and cacheability attributes */
9632 if (s1hi
== 0 || s2hi
== 0) {
9633 /* Device has precedence over normal */
9634 if (s1lo
== 0 || s2lo
== 0) {
9635 /* nGnRnE has precedence over anything */
9637 } else if (s1lo
== 4 || s2lo
== 4) {
9638 /* non-Reordering has precedence over Reordering */
9639 ret
.attrs
= 4; /* nGnRE */
9640 } else if (s1lo
== 8 || s2lo
== 8) {
9641 /* non-Gathering has precedence over Gathering */
9642 ret
.attrs
= 8; /* nGRE */
9644 ret
.attrs
= 0xc; /* GRE */
9647 /* Any location for which the resultant memory type is any
9648 * type of Device memory is always treated as Outer Shareable.
9650 ret
.shareability
= 2;
9651 } else { /* Normal memory */
9652 /* Outer/inner cacheability combine independently */
9653 ret
.attrs
= combine_cacheattr_nibble(s1hi
, s2hi
) << 4
9654 | combine_cacheattr_nibble(s1lo
, s2lo
);
9656 if (ret
.attrs
== 0x44) {
9657 /* Any location for which the resultant memory type is Normal
9658 * Inner Non-cacheable, Outer Non-cacheable is always treated
9659 * as Outer Shareable.
9661 ret
.shareability
= 2;
9669 /* get_phys_addr - get the physical address for this virtual address
9671 * Find the physical address corresponding to the given virtual address,
9672 * by doing a translation table walk on MMU based systems or using the
9673 * MPU state on MPU based systems.
9675 * Returns false if the translation was successful. Otherwise, phys_ptr, attrs,
9676 * prot and page_size may not be filled in, and the populated fsr value provides
9677 * information on why the translation aborted, in the format of a
9678 * DFSR/IFSR fault register, with the following caveats:
9679 * * we honour the short vs long DFSR format differences.
9680 * * the WnR bit is never set (the caller must do this).
9681 * * for PSMAv5 based systems we don't bother to return a full FSR format
9685 * @address: virtual address to get physical address for
9686 * @access_type: 0 for read, 1 for write, 2 for execute
9687 * @mmu_idx: MMU index indicating required translation regime
9688 * @phys_ptr: set to the physical address corresponding to the virtual address
9689 * @attrs: set to the memory transaction attributes to use
9690 * @prot: set to the permissions for the page containing phys_ptr
9691 * @page_size: set to the size of the page containing phys_ptr
9692 * @fsr: set to the DFSR/IFSR value on failure
9693 * @fi: set to fault info if the translation fails
9694 * @cacheattrs: (if non-NULL) set to the cacheability/shareability attributes
9696 static bool get_phys_addr(CPUARMState
*env
, target_ulong address
,
9697 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
9698 hwaddr
*phys_ptr
, MemTxAttrs
*attrs
, int *prot
,
9699 target_ulong
*page_size
, uint32_t *fsr
,
9700 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
)
9702 if (mmu_idx
== ARMMMUIdx_S12NSE0
|| mmu_idx
== ARMMMUIdx_S12NSE1
) {
9703 /* Call ourselves recursively to do the stage 1 and then stage 2
9706 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
9710 ARMCacheAttrs cacheattrs2
= {};
9712 ret
= get_phys_addr(env
, address
, access_type
,
9713 stage_1_mmu_idx(mmu_idx
), &ipa
, attrs
,
9714 prot
, page_size
, fsr
, fi
, cacheattrs
);
9716 /* If S1 fails or S2 is disabled, return early. */
9717 if (ret
|| regime_translation_disabled(env
, ARMMMUIdx_S2NS
)) {
9722 /* S1 is done. Now do S2 translation. */
9723 ret
= get_phys_addr_lpae(env
, ipa
, access_type
, ARMMMUIdx_S2NS
,
9724 phys_ptr
, attrs
, &s2_prot
,
9726 cacheattrs
!= NULL
? &cacheattrs2
: NULL
);
9728 /* Combine the S1 and S2 perms. */
9731 /* Combine the S1 and S2 cache attributes, if needed */
9732 if (!ret
&& cacheattrs
!= NULL
) {
9733 *cacheattrs
= combine_cacheattrs(*cacheattrs
, cacheattrs2
);
9739 * For non-EL2 CPUs a stage1+stage2 translation is just stage 1.
9741 mmu_idx
= stage_1_mmu_idx(mmu_idx
);
9745 /* The page table entries may downgrade secure to non-secure, but
9746 * cannot upgrade an non-secure translation regime's attributes
9749 attrs
->secure
= regime_is_secure(env
, mmu_idx
);
9750 attrs
->user
= regime_is_user(env
, mmu_idx
);
9752 /* Fast Context Switch Extension. This doesn't exist at all in v8.
9753 * In v7 and earlier it affects all stage 1 translations.
9755 if (address
< 0x02000000 && mmu_idx
!= ARMMMUIdx_S2NS
9756 && !arm_feature(env
, ARM_FEATURE_V8
)) {
9757 if (regime_el(env
, mmu_idx
) == 3) {
9758 address
+= env
->cp15
.fcseidr_s
;
9760 address
+= env
->cp15
.fcseidr_ns
;
9764 if (arm_feature(env
, ARM_FEATURE_PMSA
)) {
9766 *page_size
= TARGET_PAGE_SIZE
;
9768 if (arm_feature(env
, ARM_FEATURE_V8
)) {
9770 ret
= get_phys_addr_pmsav8(env
, address
, access_type
, mmu_idx
,
9771 phys_ptr
, attrs
, prot
, fsr
);
9772 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
9774 ret
= get_phys_addr_pmsav7(env
, address
, access_type
, mmu_idx
,
9775 phys_ptr
, prot
, fsr
);
9778 ret
= get_phys_addr_pmsav5(env
, address
, access_type
, mmu_idx
,
9779 phys_ptr
, prot
, fsr
);
9781 qemu_log_mask(CPU_LOG_MMU
, "PMSA MPU lookup for %s at 0x%08" PRIx32
9782 " mmu_idx %u -> %s (prot %c%c%c)\n",
9783 access_type
== MMU_DATA_LOAD
? "reading" :
9784 (access_type
== MMU_DATA_STORE
? "writing" : "execute"),
9785 (uint32_t)address
, mmu_idx
,
9786 ret
? "Miss" : "Hit",
9787 *prot
& PAGE_READ
? 'r' : '-',
9788 *prot
& PAGE_WRITE
? 'w' : '-',
9789 *prot
& PAGE_EXEC
? 'x' : '-');
9794 /* Definitely a real MMU, not an MPU */
9796 if (regime_translation_disabled(env
, mmu_idx
)) {
9798 *phys_ptr
= address
;
9799 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
9800 *page_size
= TARGET_PAGE_SIZE
;
9804 if (regime_using_lpae_format(env
, mmu_idx
)) {
9805 return get_phys_addr_lpae(env
, address
, access_type
, mmu_idx
, phys_ptr
,
9806 attrs
, prot
, page_size
, fsr
, fi
, cacheattrs
);
9807 } else if (regime_sctlr(env
, mmu_idx
) & SCTLR_XP
) {
9808 return get_phys_addr_v6(env
, address
, access_type
, mmu_idx
, phys_ptr
,
9809 attrs
, prot
, page_size
, fsr
, fi
);
9811 return get_phys_addr_v5(env
, address
, access_type
, mmu_idx
, phys_ptr
,
9812 prot
, page_size
, fsr
, fi
);
9816 /* Walk the page table and (if the mapping exists) add the page
9817 * to the TLB. Return false on success, or true on failure. Populate
9818 * fsr with ARM DFSR/IFSR fault register format value on failure.
9820 bool arm_tlb_fill(CPUState
*cs
, vaddr address
,
9821 MMUAccessType access_type
, int mmu_idx
, uint32_t *fsr
,
9822 ARMMMUFaultInfo
*fi
)
9824 ARMCPU
*cpu
= ARM_CPU(cs
);
9825 CPUARMState
*env
= &cpu
->env
;
9827 target_ulong page_size
;
9830 MemTxAttrs attrs
= {};
9832 ret
= get_phys_addr(env
, address
, access_type
,
9833 core_to_arm_mmu_idx(env
, mmu_idx
), &phys_addr
,
9834 &attrs
, &prot
, &page_size
, fsr
, fi
, NULL
);
9836 /* Map a single [sub]page. */
9837 phys_addr
&= TARGET_PAGE_MASK
;
9838 address
&= TARGET_PAGE_MASK
;
9839 tlb_set_page_with_attrs(cs
, address
, phys_addr
, attrs
,
9840 prot
, mmu_idx
, page_size
);
9847 hwaddr
arm_cpu_get_phys_page_attrs_debug(CPUState
*cs
, vaddr addr
,
9850 ARMCPU
*cpu
= ARM_CPU(cs
);
9851 CPUARMState
*env
= &cpu
->env
;
9853 target_ulong page_size
;
9857 ARMMMUFaultInfo fi
= {};
9858 ARMMMUIdx mmu_idx
= core_to_arm_mmu_idx(env
, cpu_mmu_index(env
, false));
9860 *attrs
= (MemTxAttrs
) {};
9862 ret
= get_phys_addr(env
, addr
, 0, mmu_idx
, &phys_addr
,
9863 attrs
, &prot
, &page_size
, &fsr
, &fi
, NULL
);
9871 uint32_t HELPER(v7m_mrs
)(CPUARMState
*env
, uint32_t reg
)
9874 unsigned el
= arm_current_el(env
);
9876 /* First handle registers which unprivileged can read */
9879 case 0 ... 7: /* xPSR sub-fields */
9881 if ((reg
& 1) && el
) {
9882 mask
|= XPSR_EXCP
; /* IPSR (unpriv. reads as zero) */
9885 mask
|= XPSR_NZCV
| XPSR_Q
; /* APSR */
9887 /* EPSR reads as zero */
9888 return xpsr_read(env
) & mask
;
9890 case 20: /* CONTROL */
9891 return env
->v7m
.control
[env
->v7m
.secure
];
9892 case 0x94: /* CONTROL_NS */
9893 /* We have to handle this here because unprivileged Secure code
9894 * can read the NS CONTROL register.
9896 if (!env
->v7m
.secure
) {
9899 return env
->v7m
.control
[M_REG_NS
];
9903 return 0; /* unprivileged reads others as zero */
9906 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
9908 case 0x88: /* MSP_NS */
9909 if (!env
->v7m
.secure
) {
9912 return env
->v7m
.other_ss_msp
;
9913 case 0x89: /* PSP_NS */
9914 if (!env
->v7m
.secure
) {
9917 return env
->v7m
.other_ss_psp
;
9918 case 0x90: /* PRIMASK_NS */
9919 if (!env
->v7m
.secure
) {
9922 return env
->v7m
.primask
[M_REG_NS
];
9923 case 0x91: /* BASEPRI_NS */
9924 if (!env
->v7m
.secure
) {
9927 return env
->v7m
.basepri
[M_REG_NS
];
9928 case 0x93: /* FAULTMASK_NS */
9929 if (!env
->v7m
.secure
) {
9932 return env
->v7m
.faultmask
[M_REG_NS
];
9933 case 0x98: /* SP_NS */
9935 /* This gives the non-secure SP selected based on whether we're
9936 * currently in handler mode or not, using the NS CONTROL.SPSEL.
9938 bool spsel
= env
->v7m
.control
[M_REG_NS
] & R_V7M_CONTROL_SPSEL_MASK
;
9940 if (!env
->v7m
.secure
) {
9943 if (!arm_v7m_is_handler_mode(env
) && spsel
) {
9944 return env
->v7m
.other_ss_psp
;
9946 return env
->v7m
.other_ss_msp
;
9956 return v7m_using_psp(env
) ? env
->v7m
.other_sp
: env
->regs
[13];
9958 return v7m_using_psp(env
) ? env
->regs
[13] : env
->v7m
.other_sp
;
9959 case 16: /* PRIMASK */
9960 return env
->v7m
.primask
[env
->v7m
.secure
];
9961 case 17: /* BASEPRI */
9962 case 18: /* BASEPRI_MAX */
9963 return env
->v7m
.basepri
[env
->v7m
.secure
];
9964 case 19: /* FAULTMASK */
9965 return env
->v7m
.faultmask
[env
->v7m
.secure
];
9967 qemu_log_mask(LOG_GUEST_ERROR
, "Attempt to read unknown special"
9968 " register %d\n", reg
);
9973 void HELPER(v7m_msr
)(CPUARMState
*env
, uint32_t maskreg
, uint32_t val
)
9975 /* We're passed bits [11..0] of the instruction; extract
9976 * SYSm and the mask bits.
9977 * Invalid combinations of SYSm and mask are UNPREDICTABLE;
9978 * we choose to treat them as if the mask bits were valid.
9979 * NB that the pseudocode 'mask' variable is bits [11..10],
9980 * whereas ours is [11..8].
9982 uint32_t mask
= extract32(maskreg
, 8, 4);
9983 uint32_t reg
= extract32(maskreg
, 0, 8);
9985 if (arm_current_el(env
) == 0 && reg
> 7) {
9986 /* only xPSR sub-fields may be written by unprivileged */
9990 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
9992 case 0x88: /* MSP_NS */
9993 if (!env
->v7m
.secure
) {
9996 env
->v7m
.other_ss_msp
= val
;
9998 case 0x89: /* PSP_NS */
9999 if (!env
->v7m
.secure
) {
10002 env
->v7m
.other_ss_psp
= val
;
10004 case 0x90: /* PRIMASK_NS */
10005 if (!env
->v7m
.secure
) {
10008 env
->v7m
.primask
[M_REG_NS
] = val
& 1;
10010 case 0x91: /* BASEPRI_NS */
10011 if (!env
->v7m
.secure
) {
10014 env
->v7m
.basepri
[M_REG_NS
] = val
& 0xff;
10016 case 0x93: /* FAULTMASK_NS */
10017 if (!env
->v7m
.secure
) {
10020 env
->v7m
.faultmask
[M_REG_NS
] = val
& 1;
10022 case 0x98: /* SP_NS */
10024 /* This gives the non-secure SP selected based on whether we're
10025 * currently in handler mode or not, using the NS CONTROL.SPSEL.
10027 bool spsel
= env
->v7m
.control
[M_REG_NS
] & R_V7M_CONTROL_SPSEL_MASK
;
10029 if (!env
->v7m
.secure
) {
10032 if (!arm_v7m_is_handler_mode(env
) && spsel
) {
10033 env
->v7m
.other_ss_psp
= val
;
10035 env
->v7m
.other_ss_msp
= val
;
10045 case 0 ... 7: /* xPSR sub-fields */
10046 /* only APSR is actually writable */
10048 uint32_t apsrmask
= 0;
10051 apsrmask
|= XPSR_NZCV
| XPSR_Q
;
10053 if ((mask
& 4) && arm_feature(env
, ARM_FEATURE_THUMB_DSP
)) {
10054 apsrmask
|= XPSR_GE
;
10056 xpsr_write(env
, val
, apsrmask
);
10060 if (v7m_using_psp(env
)) {
10061 env
->v7m
.other_sp
= val
;
10063 env
->regs
[13] = val
;
10067 if (v7m_using_psp(env
)) {
10068 env
->regs
[13] = val
;
10070 env
->v7m
.other_sp
= val
;
10073 case 16: /* PRIMASK */
10074 env
->v7m
.primask
[env
->v7m
.secure
] = val
& 1;
10076 case 17: /* BASEPRI */
10077 env
->v7m
.basepri
[env
->v7m
.secure
] = val
& 0xff;
10079 case 18: /* BASEPRI_MAX */
10081 if (val
!= 0 && (val
< env
->v7m
.basepri
[env
->v7m
.secure
]
10082 || env
->v7m
.basepri
[env
->v7m
.secure
] == 0)) {
10083 env
->v7m
.basepri
[env
->v7m
.secure
] = val
;
10086 case 19: /* FAULTMASK */
10087 env
->v7m
.faultmask
[env
->v7m
.secure
] = val
& 1;
10089 case 20: /* CONTROL */
10090 /* Writing to the SPSEL bit only has an effect if we are in
10091 * thread mode; other bits can be updated by any privileged code.
10092 * write_v7m_control_spsel() deals with updating the SPSEL bit in
10093 * env->v7m.control, so we only need update the others.
10094 * For v7M, we must just ignore explicit writes to SPSEL in handler
10095 * mode; for v8M the write is permitted but will have no effect.
10097 if (arm_feature(env
, ARM_FEATURE_V8
) ||
10098 !arm_v7m_is_handler_mode(env
)) {
10099 write_v7m_control_spsel(env
, (val
& R_V7M_CONTROL_SPSEL_MASK
) != 0);
10101 env
->v7m
.control
[env
->v7m
.secure
] &= ~R_V7M_CONTROL_NPRIV_MASK
;
10102 env
->v7m
.control
[env
->v7m
.secure
] |= val
& R_V7M_CONTROL_NPRIV_MASK
;
10105 qemu_log_mask(LOG_GUEST_ERROR
, "Attempt to write unknown special"
10106 " register %d\n", reg
);
10113 void HELPER(dc_zva
)(CPUARMState
*env
, uint64_t vaddr_in
)
10115 /* Implement DC ZVA, which zeroes a fixed-length block of memory.
10116 * Note that we do not implement the (architecturally mandated)
10117 * alignment fault for attempts to use this on Device memory
10118 * (which matches the usual QEMU behaviour of not implementing either
10119 * alignment faults or any memory attribute handling).
10122 ARMCPU
*cpu
= arm_env_get_cpu(env
);
10123 uint64_t blocklen
= 4 << cpu
->dcz_blocksize
;
10124 uint64_t vaddr
= vaddr_in
& ~(blocklen
- 1);
10126 #ifndef CONFIG_USER_ONLY
10128 /* Slightly awkwardly, QEMU's TARGET_PAGE_SIZE may be less than
10129 * the block size so we might have to do more than one TLB lookup.
10130 * We know that in fact for any v8 CPU the page size is at least 4K
10131 * and the block size must be 2K or less, but TARGET_PAGE_SIZE is only
10132 * 1K as an artefact of legacy v5 subpage support being present in the
10133 * same QEMU executable.
10135 int maxidx
= DIV_ROUND_UP(blocklen
, TARGET_PAGE_SIZE
);
10136 void *hostaddr
[maxidx
];
10138 unsigned mmu_idx
= cpu_mmu_index(env
, false);
10139 TCGMemOpIdx oi
= make_memop_idx(MO_UB
, mmu_idx
);
10141 for (try = 0; try < 2; try++) {
10143 for (i
= 0; i
< maxidx
; i
++) {
10144 hostaddr
[i
] = tlb_vaddr_to_host(env
,
10145 vaddr
+ TARGET_PAGE_SIZE
* i
,
10147 if (!hostaddr
[i
]) {
10152 /* If it's all in the TLB it's fair game for just writing to;
10153 * we know we don't need to update dirty status, etc.
10155 for (i
= 0; i
< maxidx
- 1; i
++) {
10156 memset(hostaddr
[i
], 0, TARGET_PAGE_SIZE
);
10158 memset(hostaddr
[i
], 0, blocklen
- (i
* TARGET_PAGE_SIZE
));
10161 /* OK, try a store and see if we can populate the tlb. This
10162 * might cause an exception if the memory isn't writable,
10163 * in which case we will longjmp out of here. We must for
10164 * this purpose use the actual register value passed to us
10165 * so that we get the fault address right.
10167 helper_ret_stb_mmu(env
, vaddr_in
, 0, oi
, GETPC());
10168 /* Now we can populate the other TLB entries, if any */
10169 for (i
= 0; i
< maxidx
; i
++) {
10170 uint64_t va
= vaddr
+ TARGET_PAGE_SIZE
* i
;
10171 if (va
!= (vaddr_in
& TARGET_PAGE_MASK
)) {
10172 helper_ret_stb_mmu(env
, va
, 0, oi
, GETPC());
10177 /* Slow path (probably attempt to do this to an I/O device or
10178 * similar, or clearing of a block of code we have translations
10179 * cached for). Just do a series of byte writes as the architecture
10180 * demands. It's not worth trying to use a cpu_physical_memory_map(),
10181 * memset(), unmap() sequence here because:
10182 * + we'd need to account for the blocksize being larger than a page
10183 * + the direct-RAM access case is almost always going to be dealt
10184 * with in the fastpath code above, so there's no speed benefit
10185 * + we would have to deal with the map returning NULL because the
10186 * bounce buffer was in use
10188 for (i
= 0; i
< blocklen
; i
++) {
10189 helper_ret_stb_mmu(env
, vaddr
+ i
, 0, oi
, GETPC());
10193 memset(g2h(vaddr
), 0, blocklen
);
10197 /* Note that signed overflow is undefined in C. The following routines are
10198 careful to use unsigned types where modulo arithmetic is required.
10199 Failure to do so _will_ break on newer gcc. */
10201 /* Signed saturating arithmetic. */
10203 /* Perform 16-bit signed saturating addition. */
10204 static inline uint16_t add16_sat(uint16_t a
, uint16_t b
)
10209 if (((res
^ a
) & 0x8000) && !((a
^ b
) & 0x8000)) {
10218 /* Perform 8-bit signed saturating addition. */
10219 static inline uint8_t add8_sat(uint8_t a
, uint8_t b
)
10224 if (((res
^ a
) & 0x80) && !((a
^ b
) & 0x80)) {
10233 /* Perform 16-bit signed saturating subtraction. */
10234 static inline uint16_t sub16_sat(uint16_t a
, uint16_t b
)
10239 if (((res
^ a
) & 0x8000) && ((a
^ b
) & 0x8000)) {
10248 /* Perform 8-bit signed saturating subtraction. */
10249 static inline uint8_t sub8_sat(uint8_t a
, uint8_t b
)
10254 if (((res
^ a
) & 0x80) && ((a
^ b
) & 0x80)) {
10263 #define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16);
10264 #define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16);
10265 #define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8);
10266 #define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8);
10269 #include "op_addsub.h"
10271 /* Unsigned saturating arithmetic. */
10272 static inline uint16_t add16_usat(uint16_t a
, uint16_t b
)
10281 static inline uint16_t sub16_usat(uint16_t a
, uint16_t b
)
10289 static inline uint8_t add8_usat(uint8_t a
, uint8_t b
)
10298 static inline uint8_t sub8_usat(uint8_t a
, uint8_t b
)
10306 #define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16);
10307 #define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16);
10308 #define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8);
10309 #define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8);
10312 #include "op_addsub.h"
10314 /* Signed modulo arithmetic. */
10315 #define SARITH16(a, b, n, op) do { \
10317 sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \
10318 RESULT(sum, n, 16); \
10320 ge |= 3 << (n * 2); \
10323 #define SARITH8(a, b, n, op) do { \
10325 sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \
10326 RESULT(sum, n, 8); \
10332 #define ADD16(a, b, n) SARITH16(a, b, n, +)
10333 #define SUB16(a, b, n) SARITH16(a, b, n, -)
10334 #define ADD8(a, b, n) SARITH8(a, b, n, +)
10335 #define SUB8(a, b, n) SARITH8(a, b, n, -)
10339 #include "op_addsub.h"
10341 /* Unsigned modulo arithmetic. */
10342 #define ADD16(a, b, n) do { \
10344 sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \
10345 RESULT(sum, n, 16); \
10346 if ((sum >> 16) == 1) \
10347 ge |= 3 << (n * 2); \
10350 #define ADD8(a, b, n) do { \
10352 sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \
10353 RESULT(sum, n, 8); \
10354 if ((sum >> 8) == 1) \
10358 #define SUB16(a, b, n) do { \
10360 sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \
10361 RESULT(sum, n, 16); \
10362 if ((sum >> 16) == 0) \
10363 ge |= 3 << (n * 2); \
10366 #define SUB8(a, b, n) do { \
10368 sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \
10369 RESULT(sum, n, 8); \
10370 if ((sum >> 8) == 0) \
10377 #include "op_addsub.h"
10379 /* Halved signed arithmetic. */
10380 #define ADD16(a, b, n) \
10381 RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16)
10382 #define SUB16(a, b, n) \
10383 RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16)
10384 #define ADD8(a, b, n) \
10385 RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8)
10386 #define SUB8(a, b, n) \
10387 RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8)
10390 #include "op_addsub.h"
10392 /* Halved unsigned arithmetic. */
10393 #define ADD16(a, b, n) \
10394 RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16)
10395 #define SUB16(a, b, n) \
10396 RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16)
10397 #define ADD8(a, b, n) \
10398 RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8)
10399 #define SUB8(a, b, n) \
10400 RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8)
10403 #include "op_addsub.h"
10405 static inline uint8_t do_usad(uint8_t a
, uint8_t b
)
10413 /* Unsigned sum of absolute byte differences. */
10414 uint32_t HELPER(usad8
)(uint32_t a
, uint32_t b
)
10417 sum
= do_usad(a
, b
);
10418 sum
+= do_usad(a
>> 8, b
>> 8);
10419 sum
+= do_usad(a
>> 16, b
>>16);
10420 sum
+= do_usad(a
>> 24, b
>> 24);
10424 /* For ARMv6 SEL instruction. */
10425 uint32_t HELPER(sel_flags
)(uint32_t flags
, uint32_t a
, uint32_t b
)
10437 mask
|= 0xff000000;
10438 return (a
& mask
) | (b
& ~mask
);
10441 /* VFP support. We follow the convention used for VFP instructions:
10442 Single precision routines have a "s" suffix, double precision a
10445 /* Convert host exception flags to vfp form. */
10446 static inline int vfp_exceptbits_from_host(int host_bits
)
10448 int target_bits
= 0;
10450 if (host_bits
& float_flag_invalid
)
10452 if (host_bits
& float_flag_divbyzero
)
10454 if (host_bits
& float_flag_overflow
)
10456 if (host_bits
& (float_flag_underflow
| float_flag_output_denormal
))
10458 if (host_bits
& float_flag_inexact
)
10459 target_bits
|= 0x10;
10460 if (host_bits
& float_flag_input_denormal
)
10461 target_bits
|= 0x80;
10462 return target_bits
;
10465 uint32_t HELPER(vfp_get_fpscr
)(CPUARMState
*env
)
10470 fpscr
= (env
->vfp
.xregs
[ARM_VFP_FPSCR
] & 0xffc8ffff)
10471 | (env
->vfp
.vec_len
<< 16)
10472 | (env
->vfp
.vec_stride
<< 20);
10473 i
= get_float_exception_flags(&env
->vfp
.fp_status
);
10474 i
|= get_float_exception_flags(&env
->vfp
.standard_fp_status
);
10475 fpscr
|= vfp_exceptbits_from_host(i
);
10479 uint32_t vfp_get_fpscr(CPUARMState
*env
)
10481 return HELPER(vfp_get_fpscr
)(env
);
10484 /* Convert vfp exception flags to target form. */
10485 static inline int vfp_exceptbits_to_host(int target_bits
)
10489 if (target_bits
& 1)
10490 host_bits
|= float_flag_invalid
;
10491 if (target_bits
& 2)
10492 host_bits
|= float_flag_divbyzero
;
10493 if (target_bits
& 4)
10494 host_bits
|= float_flag_overflow
;
10495 if (target_bits
& 8)
10496 host_bits
|= float_flag_underflow
;
10497 if (target_bits
& 0x10)
10498 host_bits
|= float_flag_inexact
;
10499 if (target_bits
& 0x80)
10500 host_bits
|= float_flag_input_denormal
;
10504 void HELPER(vfp_set_fpscr
)(CPUARMState
*env
, uint32_t val
)
10509 changed
= env
->vfp
.xregs
[ARM_VFP_FPSCR
];
10510 env
->vfp
.xregs
[ARM_VFP_FPSCR
] = (val
& 0xffc8ffff);
10511 env
->vfp
.vec_len
= (val
>> 16) & 7;
10512 env
->vfp
.vec_stride
= (val
>> 20) & 3;
10515 if (changed
& (3 << 22)) {
10516 i
= (val
>> 22) & 3;
10518 case FPROUNDING_TIEEVEN
:
10519 i
= float_round_nearest_even
;
10521 case FPROUNDING_POSINF
:
10522 i
= float_round_up
;
10524 case FPROUNDING_NEGINF
:
10525 i
= float_round_down
;
10527 case FPROUNDING_ZERO
:
10528 i
= float_round_to_zero
;
10531 set_float_rounding_mode(i
, &env
->vfp
.fp_status
);
10533 if (changed
& (1 << 24)) {
10534 set_flush_to_zero((val
& (1 << 24)) != 0, &env
->vfp
.fp_status
);
10535 set_flush_inputs_to_zero((val
& (1 << 24)) != 0, &env
->vfp
.fp_status
);
10537 if (changed
& (1 << 25))
10538 set_default_nan_mode((val
& (1 << 25)) != 0, &env
->vfp
.fp_status
);
10540 i
= vfp_exceptbits_to_host(val
);
10541 set_float_exception_flags(i
, &env
->vfp
.fp_status
);
10542 set_float_exception_flags(0, &env
->vfp
.standard_fp_status
);
10545 void vfp_set_fpscr(CPUARMState
*env
, uint32_t val
)
10547 HELPER(vfp_set_fpscr
)(env
, val
);
10550 #define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
10552 #define VFP_BINOP(name) \
10553 float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \
10555 float_status *fpst = fpstp; \
10556 return float32_ ## name(a, b, fpst); \
10558 float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \
10560 float_status *fpst = fpstp; \
10561 return float64_ ## name(a, b, fpst); \
10573 float32
VFP_HELPER(neg
, s
)(float32 a
)
10575 return float32_chs(a
);
10578 float64
VFP_HELPER(neg
, d
)(float64 a
)
10580 return float64_chs(a
);
10583 float32
VFP_HELPER(abs
, s
)(float32 a
)
10585 return float32_abs(a
);
10588 float64
VFP_HELPER(abs
, d
)(float64 a
)
10590 return float64_abs(a
);
10593 float32
VFP_HELPER(sqrt
, s
)(float32 a
, CPUARMState
*env
)
10595 return float32_sqrt(a
, &env
->vfp
.fp_status
);
10598 float64
VFP_HELPER(sqrt
, d
)(float64 a
, CPUARMState
*env
)
10600 return float64_sqrt(a
, &env
->vfp
.fp_status
);
10603 /* XXX: check quiet/signaling case */
10604 #define DO_VFP_cmp(p, type) \
10605 void VFP_HELPER(cmp, p)(type a, type b, CPUARMState *env) \
10608 switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \
10609 case 0: flags = 0x6; break; \
10610 case -1: flags = 0x8; break; \
10611 case 1: flags = 0x2; break; \
10612 default: case 2: flags = 0x3; break; \
10614 env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
10615 | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
10617 void VFP_HELPER(cmpe, p)(type a, type b, CPUARMState *env) \
10620 switch(type ## _compare(a, b, &env->vfp.fp_status)) { \
10621 case 0: flags = 0x6; break; \
10622 case -1: flags = 0x8; break; \
10623 case 1: flags = 0x2; break; \
10624 default: case 2: flags = 0x3; break; \
10626 env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
10627 | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
10629 DO_VFP_cmp(s
, float32
)
10630 DO_VFP_cmp(d
, float64
)
10633 /* Integer to float and float to integer conversions */
10635 #define CONV_ITOF(name, fsz, sign) \
10636 float##fsz HELPER(name)(uint32_t x, void *fpstp) \
10638 float_status *fpst = fpstp; \
10639 return sign##int32_to_##float##fsz((sign##int32_t)x, fpst); \
10642 #define CONV_FTOI(name, fsz, sign, round) \
10643 uint32_t HELPER(name)(float##fsz x, void *fpstp) \
10645 float_status *fpst = fpstp; \
10646 if (float##fsz##_is_any_nan(x)) { \
10647 float_raise(float_flag_invalid, fpst); \
10650 return float##fsz##_to_##sign##int32##round(x, fpst); \
10653 #define FLOAT_CONVS(name, p, fsz, sign) \
10654 CONV_ITOF(vfp_##name##to##p, fsz, sign) \
10655 CONV_FTOI(vfp_to##name##p, fsz, sign, ) \
10656 CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero)
10658 FLOAT_CONVS(si
, s
, 32, )
10659 FLOAT_CONVS(si
, d
, 64, )
10660 FLOAT_CONVS(ui
, s
, 32, u
)
10661 FLOAT_CONVS(ui
, d
, 64, u
)
10667 /* floating point conversion */
10668 float64
VFP_HELPER(fcvtd
, s
)(float32 x
, CPUARMState
*env
)
10670 float64 r
= float32_to_float64(x
, &env
->vfp
.fp_status
);
10671 /* ARM requires that S<->D conversion of any kind of NaN generates
10672 * a quiet NaN by forcing the most significant frac bit to 1.
10674 return float64_maybe_silence_nan(r
, &env
->vfp
.fp_status
);
10677 float32
VFP_HELPER(fcvts
, d
)(float64 x
, CPUARMState
*env
)
10679 float32 r
= float64_to_float32(x
, &env
->vfp
.fp_status
);
10680 /* ARM requires that S<->D conversion of any kind of NaN generates
10681 * a quiet NaN by forcing the most significant frac bit to 1.
10683 return float32_maybe_silence_nan(r
, &env
->vfp
.fp_status
);
10686 /* VFP3 fixed point conversion. */
10687 #define VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
10688 float##fsz HELPER(vfp_##name##to##p)(uint##isz##_t x, uint32_t shift, \
10691 float_status *fpst = fpstp; \
10693 tmp = itype##_to_##float##fsz(x, fpst); \
10694 return float##fsz##_scalbn(tmp, -(int)shift, fpst); \
10697 /* Notice that we want only input-denormal exception flags from the
10698 * scalbn operation: the other possible flags (overflow+inexact if
10699 * we overflow to infinity, output-denormal) aren't correct for the
10700 * complete scale-and-convert operation.
10702 #define VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, round) \
10703 uint##isz##_t HELPER(vfp_to##name##p##round)(float##fsz x, \
10707 float_status *fpst = fpstp; \
10708 int old_exc_flags = get_float_exception_flags(fpst); \
10710 if (float##fsz##_is_any_nan(x)) { \
10711 float_raise(float_flag_invalid, fpst); \
10714 tmp = float##fsz##_scalbn(x, shift, fpst); \
10715 old_exc_flags |= get_float_exception_flags(fpst) \
10716 & float_flag_input_denormal; \
10717 set_float_exception_flags(old_exc_flags, fpst); \
10718 return float##fsz##_to_##itype##round(tmp, fpst); \
10721 #define VFP_CONV_FIX(name, p, fsz, isz, itype) \
10722 VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
10723 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, _round_to_zero) \
10724 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
10726 #define VFP_CONV_FIX_A64(name, p, fsz, isz, itype) \
10727 VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
10728 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
10730 VFP_CONV_FIX(sh
, d
, 64, 64, int16
)
10731 VFP_CONV_FIX(sl
, d
, 64, 64, int32
)
10732 VFP_CONV_FIX_A64(sq
, d
, 64, 64, int64
)
10733 VFP_CONV_FIX(uh
, d
, 64, 64, uint16
)
10734 VFP_CONV_FIX(ul
, d
, 64, 64, uint32
)
10735 VFP_CONV_FIX_A64(uq
, d
, 64, 64, uint64
)
10736 VFP_CONV_FIX(sh
, s
, 32, 32, int16
)
10737 VFP_CONV_FIX(sl
, s
, 32, 32, int32
)
10738 VFP_CONV_FIX_A64(sq
, s
, 32, 64, int64
)
10739 VFP_CONV_FIX(uh
, s
, 32, 32, uint16
)
10740 VFP_CONV_FIX(ul
, s
, 32, 32, uint32
)
10741 VFP_CONV_FIX_A64(uq
, s
, 32, 64, uint64
)
10742 #undef VFP_CONV_FIX
10743 #undef VFP_CONV_FIX_FLOAT
10744 #undef VFP_CONV_FLOAT_FIX_ROUND
10746 /* Set the current fp rounding mode and return the old one.
10747 * The argument is a softfloat float_round_ value.
10749 uint32_t HELPER(set_rmode
)(uint32_t rmode
, CPUARMState
*env
)
10751 float_status
*fp_status
= &env
->vfp
.fp_status
;
10753 uint32_t prev_rmode
= get_float_rounding_mode(fp_status
);
10754 set_float_rounding_mode(rmode
, fp_status
);
10759 /* Set the current fp rounding mode in the standard fp status and return
10760 * the old one. This is for NEON instructions that need to change the
10761 * rounding mode but wish to use the standard FPSCR values for everything
10762 * else. Always set the rounding mode back to the correct value after
10764 * The argument is a softfloat float_round_ value.
10766 uint32_t HELPER(set_neon_rmode
)(uint32_t rmode
, CPUARMState
*env
)
10768 float_status
*fp_status
= &env
->vfp
.standard_fp_status
;
10770 uint32_t prev_rmode
= get_float_rounding_mode(fp_status
);
10771 set_float_rounding_mode(rmode
, fp_status
);
10776 /* Half precision conversions. */
10777 static float32
do_fcvt_f16_to_f32(uint32_t a
, CPUARMState
*env
, float_status
*s
)
10779 int ieee
= (env
->vfp
.xregs
[ARM_VFP_FPSCR
] & (1 << 26)) == 0;
10780 float32 r
= float16_to_float32(make_float16(a
), ieee
, s
);
10782 return float32_maybe_silence_nan(r
, s
);
10787 static uint32_t do_fcvt_f32_to_f16(float32 a
, CPUARMState
*env
, float_status
*s
)
10789 int ieee
= (env
->vfp
.xregs
[ARM_VFP_FPSCR
] & (1 << 26)) == 0;
10790 float16 r
= float32_to_float16(a
, ieee
, s
);
10792 r
= float16_maybe_silence_nan(r
, s
);
10794 return float16_val(r
);
10797 float32
HELPER(neon_fcvt_f16_to_f32
)(uint32_t a
, CPUARMState
*env
)
10799 return do_fcvt_f16_to_f32(a
, env
, &env
->vfp
.standard_fp_status
);
10802 uint32_t HELPER(neon_fcvt_f32_to_f16
)(float32 a
, CPUARMState
*env
)
10804 return do_fcvt_f32_to_f16(a
, env
, &env
->vfp
.standard_fp_status
);
10807 float32
HELPER(vfp_fcvt_f16_to_f32
)(uint32_t a
, CPUARMState
*env
)
10809 return do_fcvt_f16_to_f32(a
, env
, &env
->vfp
.fp_status
);
10812 uint32_t HELPER(vfp_fcvt_f32_to_f16
)(float32 a
, CPUARMState
*env
)
10814 return do_fcvt_f32_to_f16(a
, env
, &env
->vfp
.fp_status
);
10817 float64
HELPER(vfp_fcvt_f16_to_f64
)(uint32_t a
, CPUARMState
*env
)
10819 int ieee
= (env
->vfp
.xregs
[ARM_VFP_FPSCR
] & (1 << 26)) == 0;
10820 float64 r
= float16_to_float64(make_float16(a
), ieee
, &env
->vfp
.fp_status
);
10822 return float64_maybe_silence_nan(r
, &env
->vfp
.fp_status
);
10827 uint32_t HELPER(vfp_fcvt_f64_to_f16
)(float64 a
, CPUARMState
*env
)
10829 int ieee
= (env
->vfp
.xregs
[ARM_VFP_FPSCR
] & (1 << 26)) == 0;
10830 float16 r
= float64_to_float16(a
, ieee
, &env
->vfp
.fp_status
);
10832 r
= float16_maybe_silence_nan(r
, &env
->vfp
.fp_status
);
10834 return float16_val(r
);
10837 #define float32_two make_float32(0x40000000)
10838 #define float32_three make_float32(0x40400000)
10839 #define float32_one_point_five make_float32(0x3fc00000)
10841 float32
HELPER(recps_f32
)(float32 a
, float32 b
, CPUARMState
*env
)
10843 float_status
*s
= &env
->vfp
.standard_fp_status
;
10844 if ((float32_is_infinity(a
) && float32_is_zero_or_denormal(b
)) ||
10845 (float32_is_infinity(b
) && float32_is_zero_or_denormal(a
))) {
10846 if (!(float32_is_zero(a
) || float32_is_zero(b
))) {
10847 float_raise(float_flag_input_denormal
, s
);
10849 return float32_two
;
10851 return float32_sub(float32_two
, float32_mul(a
, b
, s
), s
);
10854 float32
HELPER(rsqrts_f32
)(float32 a
, float32 b
, CPUARMState
*env
)
10856 float_status
*s
= &env
->vfp
.standard_fp_status
;
10858 if ((float32_is_infinity(a
) && float32_is_zero_or_denormal(b
)) ||
10859 (float32_is_infinity(b
) && float32_is_zero_or_denormal(a
))) {
10860 if (!(float32_is_zero(a
) || float32_is_zero(b
))) {
10861 float_raise(float_flag_input_denormal
, s
);
10863 return float32_one_point_five
;
10865 product
= float32_mul(a
, b
, s
);
10866 return float32_div(float32_sub(float32_three
, product
, s
), float32_two
, s
);
10869 /* NEON helpers. */
10871 /* Constants 256 and 512 are used in some helpers; we avoid relying on
10872 * int->float conversions at run-time. */
10873 #define float64_256 make_float64(0x4070000000000000LL)
10874 #define float64_512 make_float64(0x4080000000000000LL)
10875 #define float32_maxnorm make_float32(0x7f7fffff)
10876 #define float64_maxnorm make_float64(0x7fefffffffffffffLL)
10878 /* Reciprocal functions
10880 * The algorithm that must be used to calculate the estimate
10881 * is specified by the ARM ARM, see FPRecipEstimate()
10884 static float64
recip_estimate(float64 a
, float_status
*real_fp_status
)
10886 /* These calculations mustn't set any fp exception flags,
10887 * so we use a local copy of the fp_status.
10889 float_status dummy_status
= *real_fp_status
;
10890 float_status
*s
= &dummy_status
;
10891 /* q = (int)(a * 512.0) */
10892 float64 q
= float64_mul(float64_512
, a
, s
);
10893 int64_t q_int
= float64_to_int64_round_to_zero(q
, s
);
10895 /* r = 1.0 / (((double)q + 0.5) / 512.0) */
10896 q
= int64_to_float64(q_int
, s
);
10897 q
= float64_add(q
, float64_half
, s
);
10898 q
= float64_div(q
, float64_512
, s
);
10899 q
= float64_div(float64_one
, q
, s
);
10901 /* s = (int)(256.0 * r + 0.5) */
10902 q
= float64_mul(q
, float64_256
, s
);
10903 q
= float64_add(q
, float64_half
, s
);
10904 q_int
= float64_to_int64_round_to_zero(q
, s
);
10906 /* return (double)s / 256.0 */
10907 return float64_div(int64_to_float64(q_int
, s
), float64_256
, s
);
10910 /* Common wrapper to call recip_estimate */
10911 static float64
call_recip_estimate(float64 num
, int off
, float_status
*fpst
)
10913 uint64_t val64
= float64_val(num
);
10914 uint64_t frac
= extract64(val64
, 0, 52);
10915 int64_t exp
= extract64(val64
, 52, 11);
10917 float64 scaled
, estimate
;
10919 /* Generate the scaled number for the estimate function */
10921 if (extract64(frac
, 51, 1) == 0) {
10923 frac
= extract64(frac
, 0, 50) << 2;
10925 frac
= extract64(frac
, 0, 51) << 1;
10929 /* scaled = '0' : '01111111110' : fraction<51:44> : Zeros(44); */
10930 scaled
= make_float64((0x3feULL
<< 52)
10931 | extract64(frac
, 44, 8) << 44);
10933 estimate
= recip_estimate(scaled
, fpst
);
10935 /* Build new result */
10936 val64
= float64_val(estimate
);
10937 sbit
= 0x8000000000000000ULL
& val64
;
10939 frac
= extract64(val64
, 0, 52);
10942 frac
= 1ULL << 51 | extract64(frac
, 1, 51);
10943 } else if (exp
== -1) {
10944 frac
= 1ULL << 50 | extract64(frac
, 2, 50);
10948 return make_float64(sbit
| (exp
<< 52) | frac
);
10951 static bool round_to_inf(float_status
*fpst
, bool sign_bit
)
10953 switch (fpst
->float_rounding_mode
) {
10954 case float_round_nearest_even
: /* Round to Nearest */
10956 case float_round_up
: /* Round to +Inf */
10958 case float_round_down
: /* Round to -Inf */
10960 case float_round_to_zero
: /* Round to Zero */
10964 g_assert_not_reached();
10967 float32
HELPER(recpe_f32
)(float32 input
, void *fpstp
)
10969 float_status
*fpst
= fpstp
;
10970 float32 f32
= float32_squash_input_denormal(input
, fpst
);
10971 uint32_t f32_val
= float32_val(f32
);
10972 uint32_t f32_sbit
= 0x80000000ULL
& f32_val
;
10973 int32_t f32_exp
= extract32(f32_val
, 23, 8);
10974 uint32_t f32_frac
= extract32(f32_val
, 0, 23);
10980 if (float32_is_any_nan(f32
)) {
10982 if (float32_is_signaling_nan(f32
, fpst
)) {
10983 float_raise(float_flag_invalid
, fpst
);
10984 nan
= float32_maybe_silence_nan(f32
, fpst
);
10986 if (fpst
->default_nan_mode
) {
10987 nan
= float32_default_nan(fpst
);
10990 } else if (float32_is_infinity(f32
)) {
10991 return float32_set_sign(float32_zero
, float32_is_neg(f32
));
10992 } else if (float32_is_zero(f32
)) {
10993 float_raise(float_flag_divbyzero
, fpst
);
10994 return float32_set_sign(float32_infinity
, float32_is_neg(f32
));
10995 } else if ((f32_val
& ~(1ULL << 31)) < (1ULL << 21)) {
10996 /* Abs(value) < 2.0^-128 */
10997 float_raise(float_flag_overflow
| float_flag_inexact
, fpst
);
10998 if (round_to_inf(fpst
, f32_sbit
)) {
10999 return float32_set_sign(float32_infinity
, float32_is_neg(f32
));
11001 return float32_set_sign(float32_maxnorm
, float32_is_neg(f32
));
11003 } else if (f32_exp
>= 253 && fpst
->flush_to_zero
) {
11004 float_raise(float_flag_underflow
, fpst
);
11005 return float32_set_sign(float32_zero
, float32_is_neg(f32
));
11009 f64
= make_float64(((int64_t)(f32_exp
) << 52) | (int64_t)(f32_frac
) << 29);
11010 r64
= call_recip_estimate(f64
, 253, fpst
);
11011 r64_val
= float64_val(r64
);
11012 r64_exp
= extract64(r64_val
, 52, 11);
11013 r64_frac
= extract64(r64_val
, 0, 52);
11015 /* result = sign : result_exp<7:0> : fraction<51:29>; */
11016 return make_float32(f32_sbit
|
11017 (r64_exp
& 0xff) << 23 |
11018 extract64(r64_frac
, 29, 24));
11021 float64
HELPER(recpe_f64
)(float64 input
, void *fpstp
)
11023 float_status
*fpst
= fpstp
;
11024 float64 f64
= float64_squash_input_denormal(input
, fpst
);
11025 uint64_t f64_val
= float64_val(f64
);
11026 uint64_t f64_sbit
= 0x8000000000000000ULL
& f64_val
;
11027 int64_t f64_exp
= extract64(f64_val
, 52, 11);
11033 /* Deal with any special cases */
11034 if (float64_is_any_nan(f64
)) {
11036 if (float64_is_signaling_nan(f64
, fpst
)) {
11037 float_raise(float_flag_invalid
, fpst
);
11038 nan
= float64_maybe_silence_nan(f64
, fpst
);
11040 if (fpst
->default_nan_mode
) {
11041 nan
= float64_default_nan(fpst
);
11044 } else if (float64_is_infinity(f64
)) {
11045 return float64_set_sign(float64_zero
, float64_is_neg(f64
));
11046 } else if (float64_is_zero(f64
)) {
11047 float_raise(float_flag_divbyzero
, fpst
);
11048 return float64_set_sign(float64_infinity
, float64_is_neg(f64
));
11049 } else if ((f64_val
& ~(1ULL << 63)) < (1ULL << 50)) {
11050 /* Abs(value) < 2.0^-1024 */
11051 float_raise(float_flag_overflow
| float_flag_inexact
, fpst
);
11052 if (round_to_inf(fpst
, f64_sbit
)) {
11053 return float64_set_sign(float64_infinity
, float64_is_neg(f64
));
11055 return float64_set_sign(float64_maxnorm
, float64_is_neg(f64
));
11057 } else if (f64_exp
>= 2045 && fpst
->flush_to_zero
) {
11058 float_raise(float_flag_underflow
, fpst
);
11059 return float64_set_sign(float64_zero
, float64_is_neg(f64
));
11062 r64
= call_recip_estimate(f64
, 2045, fpst
);
11063 r64_val
= float64_val(r64
);
11064 r64_exp
= extract64(r64_val
, 52, 11);
11065 r64_frac
= extract64(r64_val
, 0, 52);
11067 /* result = sign : result_exp<10:0> : fraction<51:0> */
11068 return make_float64(f64_sbit
|
11069 ((r64_exp
& 0x7ff) << 52) |
11073 /* The algorithm that must be used to calculate the estimate
11074 * is specified by the ARM ARM.
11076 static float64
recip_sqrt_estimate(float64 a
, float_status
*real_fp_status
)
11078 /* These calculations mustn't set any fp exception flags,
11079 * so we use a local copy of the fp_status.
11081 float_status dummy_status
= *real_fp_status
;
11082 float_status
*s
= &dummy_status
;
11086 if (float64_lt(a
, float64_half
, s
)) {
11087 /* range 0.25 <= a < 0.5 */
11089 /* a in units of 1/512 rounded down */
11090 /* q0 = (int)(a * 512.0); */
11091 q
= float64_mul(float64_512
, a
, s
);
11092 q_int
= float64_to_int64_round_to_zero(q
, s
);
11094 /* reciprocal root r */
11095 /* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0); */
11096 q
= int64_to_float64(q_int
, s
);
11097 q
= float64_add(q
, float64_half
, s
);
11098 q
= float64_div(q
, float64_512
, s
);
11099 q
= float64_sqrt(q
, s
);
11100 q
= float64_div(float64_one
, q
, s
);
11102 /* range 0.5 <= a < 1.0 */
11104 /* a in units of 1/256 rounded down */
11105 /* q1 = (int)(a * 256.0); */
11106 q
= float64_mul(float64_256
, a
, s
);
11107 int64_t q_int
= float64_to_int64_round_to_zero(q
, s
);
11109 /* reciprocal root r */
11110 /* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */
11111 q
= int64_to_float64(q_int
, s
);
11112 q
= float64_add(q
, float64_half
, s
);
11113 q
= float64_div(q
, float64_256
, s
);
11114 q
= float64_sqrt(q
, s
);
11115 q
= float64_div(float64_one
, q
, s
);
11117 /* r in units of 1/256 rounded to nearest */
11118 /* s = (int)(256.0 * r + 0.5); */
11120 q
= float64_mul(q
, float64_256
,s
);
11121 q
= float64_add(q
, float64_half
, s
);
11122 q_int
= float64_to_int64_round_to_zero(q
, s
);
11124 /* return (double)s / 256.0;*/
11125 return float64_div(int64_to_float64(q_int
, s
), float64_256
, s
);
11128 float32
HELPER(rsqrte_f32
)(float32 input
, void *fpstp
)
11130 float_status
*s
= fpstp
;
11131 float32 f32
= float32_squash_input_denormal(input
, s
);
11132 uint32_t val
= float32_val(f32
);
11133 uint32_t f32_sbit
= 0x80000000 & val
;
11134 int32_t f32_exp
= extract32(val
, 23, 8);
11135 uint32_t f32_frac
= extract32(val
, 0, 23);
11141 if (float32_is_any_nan(f32
)) {
11143 if (float32_is_signaling_nan(f32
, s
)) {
11144 float_raise(float_flag_invalid
, s
);
11145 nan
= float32_maybe_silence_nan(f32
, s
);
11147 if (s
->default_nan_mode
) {
11148 nan
= float32_default_nan(s
);
11151 } else if (float32_is_zero(f32
)) {
11152 float_raise(float_flag_divbyzero
, s
);
11153 return float32_set_sign(float32_infinity
, float32_is_neg(f32
));
11154 } else if (float32_is_neg(f32
)) {
11155 float_raise(float_flag_invalid
, s
);
11156 return float32_default_nan(s
);
11157 } else if (float32_is_infinity(f32
)) {
11158 return float32_zero
;
11161 /* Scale and normalize to a double-precision value between 0.25 and 1.0,
11162 * preserving the parity of the exponent. */
11164 f64_frac
= ((uint64_t) f32_frac
) << 29;
11165 if (f32_exp
== 0) {
11166 while (extract64(f64_frac
, 51, 1) == 0) {
11167 f64_frac
= f64_frac
<< 1;
11168 f32_exp
= f32_exp
-1;
11170 f64_frac
= extract64(f64_frac
, 0, 51) << 1;
11173 if (extract64(f32_exp
, 0, 1) == 0) {
11174 f64
= make_float64(((uint64_t) f32_sbit
) << 32
11178 f64
= make_float64(((uint64_t) f32_sbit
) << 32
11183 result_exp
= (380 - f32_exp
) / 2;
11185 f64
= recip_sqrt_estimate(f64
, s
);
11187 val64
= float64_val(f64
);
11189 val
= ((result_exp
& 0xff) << 23)
11190 | ((val64
>> 29) & 0x7fffff);
11191 return make_float32(val
);
11194 float64
HELPER(rsqrte_f64
)(float64 input
, void *fpstp
)
11196 float_status
*s
= fpstp
;
11197 float64 f64
= float64_squash_input_denormal(input
, s
);
11198 uint64_t val
= float64_val(f64
);
11199 uint64_t f64_sbit
= 0x8000000000000000ULL
& val
;
11200 int64_t f64_exp
= extract64(val
, 52, 11);
11201 uint64_t f64_frac
= extract64(val
, 0, 52);
11202 int64_t result_exp
;
11203 uint64_t result_frac
;
11205 if (float64_is_any_nan(f64
)) {
11207 if (float64_is_signaling_nan(f64
, s
)) {
11208 float_raise(float_flag_invalid
, s
);
11209 nan
= float64_maybe_silence_nan(f64
, s
);
11211 if (s
->default_nan_mode
) {
11212 nan
= float64_default_nan(s
);
11215 } else if (float64_is_zero(f64
)) {
11216 float_raise(float_flag_divbyzero
, s
);
11217 return float64_set_sign(float64_infinity
, float64_is_neg(f64
));
11218 } else if (float64_is_neg(f64
)) {
11219 float_raise(float_flag_invalid
, s
);
11220 return float64_default_nan(s
);
11221 } else if (float64_is_infinity(f64
)) {
11222 return float64_zero
;
11225 /* Scale and normalize to a double-precision value between 0.25 and 1.0,
11226 * preserving the parity of the exponent. */
11228 if (f64_exp
== 0) {
11229 while (extract64(f64_frac
, 51, 1) == 0) {
11230 f64_frac
= f64_frac
<< 1;
11231 f64_exp
= f64_exp
- 1;
11233 f64_frac
= extract64(f64_frac
, 0, 51) << 1;
11236 if (extract64(f64_exp
, 0, 1) == 0) {
11237 f64
= make_float64(f64_sbit
11241 f64
= make_float64(f64_sbit
11246 result_exp
= (3068 - f64_exp
) / 2;
11248 f64
= recip_sqrt_estimate(f64
, s
);
11250 result_frac
= extract64(float64_val(f64
), 0, 52);
11252 return make_float64(f64_sbit
|
11253 ((result_exp
& 0x7ff) << 52) |
11257 uint32_t HELPER(recpe_u32
)(uint32_t a
, void *fpstp
)
11259 float_status
*s
= fpstp
;
11262 if ((a
& 0x80000000) == 0) {
11266 f64
= make_float64((0x3feULL
<< 52)
11267 | ((int64_t)(a
& 0x7fffffff) << 21));
11269 f64
= recip_estimate(f64
, s
);
11271 return 0x80000000 | ((float64_val(f64
) >> 21) & 0x7fffffff);
11274 uint32_t HELPER(rsqrte_u32
)(uint32_t a
, void *fpstp
)
11276 float_status
*fpst
= fpstp
;
11279 if ((a
& 0xc0000000) == 0) {
11283 if (a
& 0x80000000) {
11284 f64
= make_float64((0x3feULL
<< 52)
11285 | ((uint64_t)(a
& 0x7fffffff) << 21));
11286 } else { /* bits 31-30 == '01' */
11287 f64
= make_float64((0x3fdULL
<< 52)
11288 | ((uint64_t)(a
& 0x3fffffff) << 22));
11291 f64
= recip_sqrt_estimate(f64
, fpst
);
11293 return 0x80000000 | ((float64_val(f64
) >> 21) & 0x7fffffff);
11296 /* VFPv4 fused multiply-accumulate */
11297 float32
VFP_HELPER(muladd
, s
)(float32 a
, float32 b
, float32 c
, void *fpstp
)
11299 float_status
*fpst
= fpstp
;
11300 return float32_muladd(a
, b
, c
, 0, fpst
);
11303 float64
VFP_HELPER(muladd
, d
)(float64 a
, float64 b
, float64 c
, void *fpstp
)
11305 float_status
*fpst
= fpstp
;
11306 return float64_muladd(a
, b
, c
, 0, fpst
);
11309 /* ARMv8 round to integral */
11310 float32
HELPER(rints_exact
)(float32 x
, void *fp_status
)
11312 return float32_round_to_int(x
, fp_status
);
11315 float64
HELPER(rintd_exact
)(float64 x
, void *fp_status
)
11317 return float64_round_to_int(x
, fp_status
);
11320 float32
HELPER(rints
)(float32 x
, void *fp_status
)
11322 int old_flags
= get_float_exception_flags(fp_status
), new_flags
;
11325 ret
= float32_round_to_int(x
, fp_status
);
11327 /* Suppress any inexact exceptions the conversion produced */
11328 if (!(old_flags
& float_flag_inexact
)) {
11329 new_flags
= get_float_exception_flags(fp_status
);
11330 set_float_exception_flags(new_flags
& ~float_flag_inexact
, fp_status
);
11336 float64
HELPER(rintd
)(float64 x
, void *fp_status
)
11338 int old_flags
= get_float_exception_flags(fp_status
), new_flags
;
11341 ret
= float64_round_to_int(x
, fp_status
);
11343 new_flags
= get_float_exception_flags(fp_status
);
11345 /* Suppress any inexact exceptions the conversion produced */
11346 if (!(old_flags
& float_flag_inexact
)) {
11347 new_flags
= get_float_exception_flags(fp_status
);
11348 set_float_exception_flags(new_flags
& ~float_flag_inexact
, fp_status
);
11354 /* Convert ARM rounding mode to softfloat */
11355 int arm_rmode_to_sf(int rmode
)
11358 case FPROUNDING_TIEAWAY
:
11359 rmode
= float_round_ties_away
;
11361 case FPROUNDING_ODD
:
11362 /* FIXME: add support for TIEAWAY and ODD */
11363 qemu_log_mask(LOG_UNIMP
, "arm: unimplemented rounding mode: %d\n",
11365 case FPROUNDING_TIEEVEN
:
11367 rmode
= float_round_nearest_even
;
11369 case FPROUNDING_POSINF
:
11370 rmode
= float_round_up
;
11372 case FPROUNDING_NEGINF
:
11373 rmode
= float_round_down
;
11375 case FPROUNDING_ZERO
:
11376 rmode
= float_round_to_zero
;
11383 * The upper bytes of val (above the number specified by 'bytes') must have
11384 * been zeroed out by the caller.
11386 uint32_t HELPER(crc32
)(uint32_t acc
, uint32_t val
, uint32_t bytes
)
11390 stl_le_p(buf
, val
);
11392 /* zlib crc32 converts the accumulator and output to one's complement. */
11393 return crc32(acc
^ 0xffffffff, buf
, bytes
) ^ 0xffffffff;
11396 uint32_t HELPER(crc32c
)(uint32_t acc
, uint32_t val
, uint32_t bytes
)
11400 stl_le_p(buf
, val
);
11402 /* Linux crc32c converts the output to one's complement. */
11403 return crc32c(acc
, buf
, bytes
) ^ 0xffffffff;