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2 * QEMU ARM CPU -- internal functions and types
4 * Copyright (c) 2014 Linaro Ltd
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see
18 * <http://www.gnu.org/licenses/gpl-2.0.html>
20 * This header defines functions, types, etc which need to be shared
21 * between different source files within target-arm/ but which are
22 * private to it and not required by the rest of QEMU.
25 #ifndef TARGET_ARM_INTERNALS_H
26 #define TARGET_ARM_INTERNALS_H
28 static inline bool excp_is_internal(int excp
)
30 /* Return true if this exception number represents a QEMU-internal
31 * exception that will not be passed to the guest.
33 return excp
== EXCP_INTERRUPT
36 || excp
== EXCP_HALTED
37 || excp
== EXCP_EXCEPTION_EXIT
38 || excp
== EXCP_KERNEL_TRAP
39 || excp
== EXCP_STREX
;
42 /* Exception names for debug logging; note that not all of these
43 * precisely correspond to architectural exceptions.
45 static const char * const excnames
[] = {
46 [EXCP_UDEF
] = "Undefined Instruction",
48 [EXCP_PREFETCH_ABORT
] = "Prefetch Abort",
49 [EXCP_DATA_ABORT
] = "Data Abort",
52 [EXCP_BKPT
] = "Breakpoint",
53 [EXCP_EXCEPTION_EXIT
] = "QEMU v7M exception exit",
54 [EXCP_KERNEL_TRAP
] = "QEMU intercept of kernel commpage",
55 [EXCP_STREX
] = "QEMU intercept of STREX",
56 [EXCP_HVC
] = "Hypervisor Call",
57 [EXCP_HYP_TRAP
] = "Hypervisor Trap",
60 static inline void arm_log_exception(int idx
)
62 if (qemu_loglevel_mask(CPU_LOG_INT
)) {
63 const char *exc
= NULL
;
65 if (idx
>= 0 && idx
< ARRAY_SIZE(excnames
)) {
71 qemu_log_mask(CPU_LOG_INT
, "Taking exception %d [%s]\n", idx
, exc
);
75 /* Scale factor for generic timers, ie number of ns per tick.
76 * This gives a 62.5MHz timer.
78 #define GTIMER_SCALE 16
81 * For AArch64, map a given EL to an index in the banked_spsr array.
83 static inline unsigned int aarch64_banked_spsr_index(unsigned int el
)
85 static const unsigned int map
[4] = {
90 assert(el
>= 1 && el
<= 3);
94 int bank_number(int mode
);
95 void switch_mode(CPUARMState
*, int);
96 void arm_cpu_register_gdb_regs_for_features(ARMCPU
*cpu
);
97 void arm_translate_init(void);
108 int arm_rmode_to_sf(int rmode
);
110 static inline void aarch64_save_sp(CPUARMState
*env
, int el
)
112 if (env
->pstate
& PSTATE_SP
) {
113 env
->sp_el
[el
] = env
->xregs
[31];
115 env
->sp_el
[0] = env
->xregs
[31];
119 static inline void aarch64_restore_sp(CPUARMState
*env
, int el
)
121 if (env
->pstate
& PSTATE_SP
) {
122 env
->xregs
[31] = env
->sp_el
[el
];
124 env
->xregs
[31] = env
->sp_el
[0];
128 static inline void update_spsel(CPUARMState
*env
, uint32_t imm
)
130 unsigned int cur_el
= arm_current_pl(env
);
131 /* Update PSTATE SPSel bit; this requires us to update the
132 * working stack pointer in xregs[31].
134 if (!((imm
^ env
->pstate
) & PSTATE_SP
)) {
137 aarch64_save_sp(env
, cur_el
);
138 env
->pstate
= deposit32(env
->pstate
, 0, 1, imm
);
140 /* We rely on illegal updates to SPsel from EL0 to get trapped
141 * at translation time.
143 assert(cur_el
>= 1 && cur_el
<= 3);
144 aarch64_restore_sp(env
, cur_el
);
147 /* Return true if extended addresses are enabled.
148 * This is always the case if our translation regime is 64 bit,
149 * but depends on TTBCR.EAE for 32 bit.
151 static inline bool extended_addresses_enabled(CPUARMState
*env
)
153 return arm_el_is_aa64(env
, 1)
154 || ((arm_feature(env
, ARM_FEATURE_LPAE
)
155 && (env
->cp15
.c2_control
& TTBCR_EAE
)));
158 /* Valid Syndrome Register EC field values */
159 enum arm_exception_class
{
160 EC_UNCATEGORIZED
= 0x00,
162 EC_CP15RTTRAP
= 0x03,
163 EC_CP15RRTTRAP
= 0x04,
164 EC_CP14RTTRAP
= 0x05,
165 EC_CP14DTTRAP
= 0x06,
166 EC_ADVSIMDFPACCESSTRAP
= 0x07,
168 EC_CP14RRTTRAP
= 0x0c,
169 EC_ILLEGALSTATE
= 0x0e,
176 EC_SYSTEMREGISTERTRAP
= 0x18,
178 EC_INSNABORT_SAME_EL
= 0x21,
179 EC_PCALIGNMENT
= 0x22,
181 EC_DATAABORT_SAME_EL
= 0x25,
182 EC_SPALIGNMENT
= 0x26,
183 EC_AA32_FPTRAP
= 0x28,
184 EC_AA64_FPTRAP
= 0x2c,
186 EC_BREAKPOINT
= 0x30,
187 EC_BREAKPOINT_SAME_EL
= 0x31,
188 EC_SOFTWARESTEP
= 0x32,
189 EC_SOFTWARESTEP_SAME_EL
= 0x33,
190 EC_WATCHPOINT
= 0x34,
191 EC_WATCHPOINT_SAME_EL
= 0x35,
193 EC_VECTORCATCH
= 0x3a,
197 #define ARM_EL_EC_SHIFT 26
198 #define ARM_EL_IL_SHIFT 25
199 #define ARM_EL_IL (1 << ARM_EL_IL_SHIFT)
201 /* Utility functions for constructing various kinds of syndrome value.
202 * Note that in general we follow the AArch64 syndrome values; in a
203 * few cases the value in HSR for exceptions taken to AArch32 Hyp
204 * mode differs slightly, so if we ever implemented Hyp mode then the
205 * syndrome value would need some massaging on exception entry.
206 * (One example of this is that AArch64 defaults to IL bit set for
207 * exceptions which don't specifically indicate information about the
208 * trapping instruction, whereas AArch32 defaults to IL bit clear.)
210 static inline uint32_t syn_uncategorized(void)
212 return (EC_UNCATEGORIZED
<< ARM_EL_EC_SHIFT
) | ARM_EL_IL
;
215 static inline uint32_t syn_aa64_svc(uint32_t imm16
)
217 return (EC_AA64_SVC
<< ARM_EL_EC_SHIFT
) | ARM_EL_IL
| (imm16
& 0xffff);
220 static inline uint32_t syn_aa64_hvc(uint32_t imm16
)
222 return (EC_AA64_HVC
<< ARM_EL_EC_SHIFT
) | ARM_EL_IL
| (imm16
& 0xffff);
225 static inline uint32_t syn_aa32_svc(uint32_t imm16
, bool is_thumb
)
227 return (EC_AA32_SVC
<< ARM_EL_EC_SHIFT
) | (imm16
& 0xffff)
228 | (is_thumb
? 0 : ARM_EL_IL
);
231 static inline uint32_t syn_aa64_bkpt(uint32_t imm16
)
233 return (EC_AA64_BKPT
<< ARM_EL_EC_SHIFT
) | ARM_EL_IL
| (imm16
& 0xffff);
236 static inline uint32_t syn_aa32_bkpt(uint32_t imm16
, bool is_thumb
)
238 return (EC_AA32_BKPT
<< ARM_EL_EC_SHIFT
) | (imm16
& 0xffff)
239 | (is_thumb
? 0 : ARM_EL_IL
);
242 static inline uint32_t syn_aa64_sysregtrap(int op0
, int op1
, int op2
,
243 int crn
, int crm
, int rt
,
246 return (EC_SYSTEMREGISTERTRAP
<< ARM_EL_EC_SHIFT
) | ARM_EL_IL
247 | (op0
<< 20) | (op2
<< 17) | (op1
<< 14) | (crn
<< 10) | (rt
<< 5)
248 | (crm
<< 1) | isread
;
251 static inline uint32_t syn_cp14_rt_trap(int cv
, int cond
, int opc1
, int opc2
,
252 int crn
, int crm
, int rt
, int isread
,
255 return (EC_CP14RTTRAP
<< ARM_EL_EC_SHIFT
)
256 | (is_thumb
? 0 : ARM_EL_IL
)
257 | (cv
<< 24) | (cond
<< 20) | (opc2
<< 17) | (opc1
<< 14)
258 | (crn
<< 10) | (rt
<< 5) | (crm
<< 1) | isread
;
261 static inline uint32_t syn_cp15_rt_trap(int cv
, int cond
, int opc1
, int opc2
,
262 int crn
, int crm
, int rt
, int isread
,
265 return (EC_CP15RTTRAP
<< ARM_EL_EC_SHIFT
)
266 | (is_thumb
? 0 : ARM_EL_IL
)
267 | (cv
<< 24) | (cond
<< 20) | (opc2
<< 17) | (opc1
<< 14)
268 | (crn
<< 10) | (rt
<< 5) | (crm
<< 1) | isread
;
271 static inline uint32_t syn_cp14_rrt_trap(int cv
, int cond
, int opc1
, int crm
,
272 int rt
, int rt2
, int isread
,
275 return (EC_CP14RRTTRAP
<< ARM_EL_EC_SHIFT
)
276 | (is_thumb
? 0 : ARM_EL_IL
)
277 | (cv
<< 24) | (cond
<< 20) | (opc1
<< 16)
278 | (rt2
<< 10) | (rt
<< 5) | (crm
<< 1) | isread
;
281 static inline uint32_t syn_cp15_rrt_trap(int cv
, int cond
, int opc1
, int crm
,
282 int rt
, int rt2
, int isread
,
285 return (EC_CP15RRTTRAP
<< ARM_EL_EC_SHIFT
)
286 | (is_thumb
? 0 : ARM_EL_IL
)
287 | (cv
<< 24) | (cond
<< 20) | (opc1
<< 16)
288 | (rt2
<< 10) | (rt
<< 5) | (crm
<< 1) | isread
;
291 static inline uint32_t syn_fp_access_trap(int cv
, int cond
, bool is_thumb
)
293 return (EC_ADVSIMDFPACCESSTRAP
<< ARM_EL_EC_SHIFT
)
294 | (is_thumb
? 0 : ARM_EL_IL
)
295 | (cv
<< 24) | (cond
<< 20);
298 static inline uint32_t syn_insn_abort(int same_el
, int ea
, int s1ptw
, int fsc
)
300 return (EC_INSNABORT
<< ARM_EL_EC_SHIFT
) | (same_el
<< ARM_EL_EC_SHIFT
)
301 | (ea
<< 9) | (s1ptw
<< 7) | fsc
;
304 static inline uint32_t syn_data_abort(int same_el
, int ea
, int cm
, int s1ptw
,
307 return (EC_DATAABORT
<< ARM_EL_EC_SHIFT
) | (same_el
<< ARM_EL_EC_SHIFT
)
308 | (ea
<< 9) | (cm
<< 8) | (s1ptw
<< 7) | (wnr
<< 6) | fsc
;
311 static inline uint32_t syn_swstep(int same_el
, int isv
, int ex
)
313 return (EC_SOFTWARESTEP
<< ARM_EL_EC_SHIFT
) | (same_el
<< ARM_EL_EC_SHIFT
)
314 | (isv
<< 24) | (ex
<< 6) | 0x22;
317 static inline uint32_t syn_watchpoint(int same_el
, int cm
, int wnr
)
319 return (EC_WATCHPOINT
<< ARM_EL_EC_SHIFT
) | (same_el
<< ARM_EL_EC_SHIFT
)
320 | (cm
<< 8) | (wnr
<< 6) | 0x22;
323 static inline uint32_t syn_breakpoint(int same_el
)
325 return (EC_BREAKPOINT
<< ARM_EL_EC_SHIFT
) | (same_el
<< ARM_EL_EC_SHIFT
)
329 /* Update a QEMU watchpoint based on the information the guest has set in the
330 * DBGWCR<n>_EL1 and DBGWVR<n>_EL1 registers.
332 void hw_watchpoint_update(ARMCPU
*cpu
, int n
);
333 /* Update the QEMU watchpoints for every guest watchpoint. This does a
334 * complete delete-and-reinstate of the QEMU watchpoint list and so is
335 * suitable for use after migration or on reset.
337 void hw_watchpoint_update_all(ARMCPU
*cpu
);
338 /* Update a QEMU breakpoint based on the information the guest has set in the
339 * DBGBCR<n>_EL1 and DBGBVR<n>_EL1 registers.
341 void hw_breakpoint_update(ARMCPU
*cpu
, int n
);
342 /* Update the QEMU breakpoints for every guest breakpoint. This does a
343 * complete delete-and-reinstate of the QEMU breakpoint list and so is
344 * suitable for use after migration or on reset.
346 void hw_breakpoint_update_all(ARMCPU
*cpu
);
348 /* Callback function for when a watchpoint or breakpoint triggers. */
349 void arm_debug_excp_handler(CPUState
*cs
);