1 #ifndef TARGET_ARM_TRANSLATE_H
2 #define TARGET_ARM_TRANSLATE_H
4 #include "exec/translator.h"
9 typedef struct DisasContext
{
10 DisasContextBase base
;
11 const ARMISARegisters
*isar
;
13 /* The address of the current instruction being translated. */
15 target_ulong page_start
;
17 /* Nonzero if this instruction has been conditionally skipped. */
19 /* The label that will be jumped to when the instruction is skipped. */
21 /* Thumb-2 conditional execution bits. */
27 #if !defined(CONFIG_USER_ONLY)
30 ARMMMUIdx mmu_idx
; /* MMU index to use for normal loads/stores */
31 uint8_t tbii
; /* TBI1|TBI0 for insns */
32 uint8_t tbid
; /* TBI1|TBI0 for data */
33 uint8_t tcma
; /* TCMA1|TCMA0 for MTE */
34 bool ns
; /* Use non-secure CPREG bank on access */
35 int fp_excp_el
; /* FP exception EL or 0 if enabled */
36 int sve_excp_el
; /* SVE exception EL or 0 if enabled */
37 int sve_len
; /* SVE vector length in bytes */
38 /* Flag indicating that exceptions from secure mode are routed to EL3. */
39 bool secure_routed_to_el3
;
40 bool vfp_enabled
; /* FP enabled via FPSCR.EN */
43 bool v7m_handler_mode
;
44 bool v8m_secure
; /* true if v8M and we're in Secure mode */
45 bool v8m_stackcheck
; /* true if we need to perform v8M stack limit checks */
46 bool v8m_fpccr_s_wrong
; /* true if v8M FPCCR.S != v8m_secure */
47 bool v7m_new_fp_ctxt_needed
; /* ASPEN set but no active FP context */
48 bool v7m_lspact
; /* FPCCR.LSPACT set */
49 /* Immediate value in AArch32 SVC insn; must be set if is_jmp == DISAS_SWI
50 * so that top level loop can generate correct syndrome information.
55 /* Debug target exception level for single-step exceptions */
58 uint64_t features
; /* CPU features bits */
59 /* Because unallocated encodings generate different exception syndrome
60 * information from traps due to FP being disabled, we can't do a single
61 * "is fp access disabled" check at a high level in the decode tree.
62 * To help in catching bugs where the access check was forgotten in some
63 * code path, we set this flag when the access check is done, and assert
64 * that it is set at the point where we actually touch the FP regs.
66 bool fp_access_checked
;
67 /* ARMv8 single-step state (this is distinct from the QEMU gdbstub
68 * single-step support).
72 /* True if the insn just emitted was a load-exclusive instruction
73 * (necessary for syndrome information for single step exceptions),
74 * ie A64 LDX*, LDAX*, A32/T32 LDREX*, LDAEX*.
77 /* True if AccType_UNPRIV should be used for LDTR et al */
79 /* True if v8.3-PAuth is active. */
81 /* True if v8.5-MTE access to tags is enabled. */
83 /* True if v8.5-MTE tag checks affect the PE; index with is_unpriv. */
85 /* True with v8.5-BTI and SCTLR_ELx.BT* set. */
87 /* True if any CP15 access is trapped by HSTR_EL2 */
90 * >= 0, a copy of PSTATE.BTYPE, which will be 0 without v8.5-BTI.
91 * < 0, set by the current instruction.
94 /* True if this page is guarded. */
96 /* Bottom two bits of XScale c15_cpar coprocessor access control reg */
98 /* TCG op of the current insn_start. */
100 #define TMP_A64_MAX 16
102 TCGv_i64 tmp_a64
[TMP_A64_MAX
];
105 typedef struct DisasCompare
{
111 /* Share the TCG temporaries common between 32 and 64 bit modes. */
112 extern TCGv_i32 cpu_NF
, cpu_ZF
, cpu_CF
, cpu_VF
;
113 extern TCGv_i64 cpu_exclusive_addr
;
114 extern TCGv_i64 cpu_exclusive_val
;
116 static inline int arm_dc_feature(DisasContext
*dc
, int feature
)
118 return (dc
->features
& (1ULL << feature
)) != 0;
121 static inline int get_mem_index(DisasContext
*s
)
123 return arm_to_core_mmu_idx(s
->mmu_idx
);
126 /* Function used to determine the target exception EL when otherwise not known
129 static inline int default_exception_el(DisasContext
*s
)
131 /* If we are coming from secure EL0 in a system with a 32-bit EL3, then
132 * there is no secure EL1, so we route exceptions to EL3. Otherwise,
133 * exceptions can only be routed to ELs above 1, so we target the higher of
134 * 1 or the current EL.
136 return (s
->mmu_idx
== ARMMMUIdx_SE10_0
&& s
->secure_routed_to_el3
)
137 ? 3 : MAX(1, s
->current_el
);
140 static inline void disas_set_insn_syndrome(DisasContext
*s
, uint32_t syn
)
142 /* We don't need to save all of the syndrome so we mask and shift
143 * out unneeded bits to help the sleb128 encoder do a better job.
145 syn
&= ARM_INSN_START_WORD2_MASK
;
146 syn
>>= ARM_INSN_START_WORD2_SHIFT
;
148 /* We check and clear insn_start_idx to catch multiple updates. */
149 assert(s
->insn_start
!= NULL
);
150 tcg_set_insn_start_param(s
->insn_start
, 2, syn
);
151 s
->insn_start
= NULL
;
154 /* is_jmp field values */
155 #define DISAS_JUMP DISAS_TARGET_0 /* only pc was modified dynamically */
156 /* CPU state was modified dynamically; exit to main loop for interrupts. */
157 #define DISAS_UPDATE_EXIT DISAS_TARGET_1
158 /* These instructions trap after executing, so the A32/T32 decoder must
159 * defer them until after the conditional execution state has been updated.
160 * WFI also needs special handling when single-stepping.
162 #define DISAS_WFI DISAS_TARGET_2
163 #define DISAS_SWI DISAS_TARGET_3
165 #define DISAS_WFE DISAS_TARGET_4
166 #define DISAS_HVC DISAS_TARGET_5
167 #define DISAS_SMC DISAS_TARGET_6
168 #define DISAS_YIELD DISAS_TARGET_7
169 /* M profile branch which might be an exception return (and so needs
170 * custom end-of-TB code)
172 #define DISAS_BX_EXCRET DISAS_TARGET_8
174 * For instructions which want an immediate exit to the main loop, as opposed
175 * to attempting to use lookup_and_goto_ptr. Unlike DISAS_UPDATE_EXIT, this
176 * doesn't write the PC on exiting the translation loop so you need to ensure
177 * something (gen_a64_set_pc_im or runtime helper) has done so before we reach
178 * return from cpu_tb_exec.
180 #define DISAS_EXIT DISAS_TARGET_9
181 /* CPU state was modified dynamically; no need to exit, but do not chain. */
182 #define DISAS_UPDATE_NOCHAIN DISAS_TARGET_10
184 #ifdef TARGET_AARCH64
185 void a64_translate_init(void);
186 void gen_a64_set_pc_im(uint64_t val
);
187 extern const TranslatorOps aarch64_translator_ops
;
189 static inline void a64_translate_init(void)
193 static inline void gen_a64_set_pc_im(uint64_t val
)
198 void arm_test_cc(DisasCompare
*cmp
, int cc
);
199 void arm_free_cc(DisasCompare
*cmp
);
200 void arm_jump_cc(DisasCompare
*cmp
, TCGLabel
*label
);
201 void arm_gen_test_cc(int cc
, TCGLabel
*label
);
203 /* Return state of Alternate Half-precision flag, caller frees result */
204 static inline TCGv_i32
get_ahp_flag(void)
206 TCGv_i32 ret
= tcg_temp_new_i32();
208 tcg_gen_ld_i32(ret
, cpu_env
,
209 offsetof(CPUARMState
, vfp
.xregs
[ARM_VFP_FPSCR
]));
210 tcg_gen_extract_i32(ret
, ret
, 26, 1);
215 /* Set bits within PSTATE. */
216 static inline void set_pstate_bits(uint32_t bits
)
218 TCGv_i32 p
= tcg_temp_new_i32();
220 tcg_debug_assert(!(bits
& CACHED_PSTATE_BITS
));
222 tcg_gen_ld_i32(p
, cpu_env
, offsetof(CPUARMState
, pstate
));
223 tcg_gen_ori_i32(p
, p
, bits
);
224 tcg_gen_st_i32(p
, cpu_env
, offsetof(CPUARMState
, pstate
));
225 tcg_temp_free_i32(p
);
228 /* Clear bits within PSTATE. */
229 static inline void clear_pstate_bits(uint32_t bits
)
231 TCGv_i32 p
= tcg_temp_new_i32();
233 tcg_debug_assert(!(bits
& CACHED_PSTATE_BITS
));
235 tcg_gen_ld_i32(p
, cpu_env
, offsetof(CPUARMState
, pstate
));
236 tcg_gen_andi_i32(p
, p
, ~bits
);
237 tcg_gen_st_i32(p
, cpu_env
, offsetof(CPUARMState
, pstate
));
238 tcg_temp_free_i32(p
);
241 /* If the singlestep state is Active-not-pending, advance to Active-pending. */
242 static inline void gen_ss_advance(DisasContext
*s
)
246 clear_pstate_bits(PSTATE_SS
);
250 static inline void gen_exception(int excp
, uint32_t syndrome
,
253 TCGv_i32 tcg_excp
= tcg_const_i32(excp
);
254 TCGv_i32 tcg_syn
= tcg_const_i32(syndrome
);
255 TCGv_i32 tcg_el
= tcg_const_i32(target_el
);
257 gen_helper_exception_with_syndrome(cpu_env
, tcg_excp
,
260 tcg_temp_free_i32(tcg_el
);
261 tcg_temp_free_i32(tcg_syn
);
262 tcg_temp_free_i32(tcg_excp
);
265 /* Generate an architectural singlestep exception */
266 static inline void gen_swstep_exception(DisasContext
*s
, int isv
, int ex
)
268 bool same_el
= (s
->debug_target_el
== s
->current_el
);
271 * If singlestep is targeting a lower EL than the current one,
272 * then s->ss_active must be false and we can never get here.
274 assert(s
->debug_target_el
>= s
->current_el
);
276 gen_exception(EXCP_UDEF
, syn_swstep(same_el
, isv
, ex
), s
->debug_target_el
);
280 * Given a VFP floating point constant encoded into an 8 bit immediate in an
281 * instruction, expand it to the actual constant value of the specified
282 * size, as per the VFPExpandImm() pseudocode in the Arm ARM.
284 uint64_t vfp_expand_imm(int size
, uint8_t imm8
);
286 /* Vector operations shared between ARM and AArch64. */
287 void gen_gvec_ceq0(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
288 uint32_t opr_sz
, uint32_t max_sz
);
289 void gen_gvec_clt0(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
290 uint32_t opr_sz
, uint32_t max_sz
);
291 void gen_gvec_cgt0(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
292 uint32_t opr_sz
, uint32_t max_sz
);
293 void gen_gvec_cle0(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
294 uint32_t opr_sz
, uint32_t max_sz
);
295 void gen_gvec_cge0(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
296 uint32_t opr_sz
, uint32_t max_sz
);
298 void gen_gvec_mla(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
299 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
300 void gen_gvec_mls(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
301 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
303 void gen_gvec_cmtst(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
304 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
305 void gen_gvec_sshl(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
306 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
307 void gen_gvec_ushl(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
308 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
310 void gen_cmtst_i64(TCGv_i64 d
, TCGv_i64 a
, TCGv_i64 b
);
311 void gen_ushl_i32(TCGv_i32 d
, TCGv_i32 a
, TCGv_i32 b
);
312 void gen_sshl_i32(TCGv_i32 d
, TCGv_i32 a
, TCGv_i32 b
);
313 void gen_ushl_i64(TCGv_i64 d
, TCGv_i64 a
, TCGv_i64 b
);
314 void gen_sshl_i64(TCGv_i64 d
, TCGv_i64 a
, TCGv_i64 b
);
316 void gen_gvec_uqadd_qc(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
317 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
318 void gen_gvec_sqadd_qc(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
319 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
320 void gen_gvec_uqsub_qc(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
321 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
322 void gen_gvec_sqsub_qc(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
323 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
325 void gen_gvec_ssra(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
326 int64_t shift
, uint32_t opr_sz
, uint32_t max_sz
);
327 void gen_gvec_usra(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
328 int64_t shift
, uint32_t opr_sz
, uint32_t max_sz
);
330 void gen_gvec_srshr(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
331 int64_t shift
, uint32_t opr_sz
, uint32_t max_sz
);
332 void gen_gvec_urshr(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
333 int64_t shift
, uint32_t opr_sz
, uint32_t max_sz
);
334 void gen_gvec_srsra(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
335 int64_t shift
, uint32_t opr_sz
, uint32_t max_sz
);
336 void gen_gvec_ursra(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
337 int64_t shift
, uint32_t opr_sz
, uint32_t max_sz
);
339 void gen_gvec_sri(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
340 int64_t shift
, uint32_t opr_sz
, uint32_t max_sz
);
341 void gen_gvec_sli(unsigned vece
, uint32_t rd_ofs
, uint32_t rm_ofs
,
342 int64_t shift
, uint32_t opr_sz
, uint32_t max_sz
);
344 void gen_gvec_sqrdmlah_qc(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
345 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
346 void gen_gvec_sqrdmlsh_qc(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
347 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
349 void gen_gvec_sabd(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
350 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
351 void gen_gvec_uabd(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
352 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
354 void gen_gvec_saba(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
355 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
356 void gen_gvec_uaba(unsigned vece
, uint32_t rd_ofs
, uint32_t rn_ofs
,
357 uint32_t rm_ofs
, uint32_t opr_sz
, uint32_t max_sz
);
360 * Forward to the isar_feature_* tests given a DisasContext pointer.
362 #define dc_isar_feature(name, ctx) \
363 ({ DisasContext *ctx_ = (ctx); isar_feature_##name(ctx_->isar); })
365 /* Note that the gvec expanders operate on offsets + sizes. */
366 typedef void GVecGen2Fn(unsigned, uint32_t, uint32_t, uint32_t, uint32_t);
367 typedef void GVecGen2iFn(unsigned, uint32_t, uint32_t, int64_t,
369 typedef void GVecGen3Fn(unsigned, uint32_t, uint32_t,
370 uint32_t, uint32_t, uint32_t);
371 typedef void GVecGen4Fn(unsigned, uint32_t, uint32_t, uint32_t,
372 uint32_t, uint32_t, uint32_t);
374 /* Function prototype for gen_ functions for calling Neon helpers */
375 typedef void NeonGenOneOpFn(TCGv_i32
, TCGv_i32
);
376 typedef void NeonGenOneOpEnvFn(TCGv_i32
, TCGv_ptr
, TCGv_i32
);
377 typedef void NeonGenTwoOpFn(TCGv_i32
, TCGv_i32
, TCGv_i32
);
378 typedef void NeonGenTwoOpEnvFn(TCGv_i32
, TCGv_ptr
, TCGv_i32
, TCGv_i32
);
379 typedef void NeonGenTwo64OpFn(TCGv_i64
, TCGv_i64
, TCGv_i64
);
380 typedef void NeonGenTwo64OpEnvFn(TCGv_i64
, TCGv_ptr
, TCGv_i64
, TCGv_i64
);
381 typedef void NeonGenNarrowFn(TCGv_i32
, TCGv_i64
);
382 typedef void NeonGenNarrowEnvFn(TCGv_i32
, TCGv_ptr
, TCGv_i64
);
383 typedef void NeonGenWidenFn(TCGv_i64
, TCGv_i32
);
384 typedef void NeonGenTwoOpWidenFn(TCGv_i64
, TCGv_i32
, TCGv_i32
);
385 typedef void NeonGenOneSingleOpFn(TCGv_i32
, TCGv_i32
, TCGv_ptr
);
386 typedef void NeonGenTwoSingleOpFn(TCGv_i32
, TCGv_i32
, TCGv_i32
, TCGv_ptr
);
387 typedef void NeonGenTwoDoubleOpFn(TCGv_i64
, TCGv_i64
, TCGv_i64
, TCGv_ptr
);
388 typedef void NeonGenOne64OpFn(TCGv_i64
, TCGv_i64
);
389 typedef void CryptoTwoOpFn(TCGv_ptr
, TCGv_ptr
);
390 typedef void CryptoThreeOpIntFn(TCGv_ptr
, TCGv_ptr
, TCGv_i32
);
391 typedef void CryptoThreeOpFn(TCGv_ptr
, TCGv_ptr
, TCGv_ptr
);
392 typedef void AtomicThreeOpFn(TCGv_i64
, TCGv_i64
, TCGv_i64
, TCGArg
, MemOp
);
394 #endif /* TARGET_ARM_TRANSLATE_H */