1 #ifndef TARGET_ARM_TRANSLATE_H
2 #define TARGET_ARM_TRANSLATE_H
5 typedef struct DisasContext {
9 /* Nonzero if this instruction has been conditionally skipped. */
11 /* The label that will be jumped to when the instruction is skipped. */
13 /* Thumb-2 conditional execution bits. */
16 struct TranslationBlock *tb;
17 int singlestep_enabled;
21 #if !defined(CONFIG_USER_ONLY)
24 ARMMMUIdx mmu_idx; /* MMU index to use for normal loads/stores */
25 bool tbi0; /* TBI0 for EL0/1 or TBI for EL2/3 */
26 bool tbi1; /* TBI1 for EL0/1, not used for EL2/3 */
27 bool ns; /* Use non-secure CPREG bank on access */
28 int fp_excp_el; /* FP exception EL or 0 if enabled */
29 /* Flag indicating that exceptions from secure mode are routed to EL3. */
30 bool secure_routed_to_el3;
31 bool vfp_enabled; /* FP enabled via FPSCR.EN */
34 bool v7m_handler_mode;
35 /* Immediate value in AArch32 SVC insn; must be set if is_jmp == DISAS_SWI
36 * so that top level loop can generate correct syndrome information.
42 uint64_t features; /* CPU features bits */
43 /* Because unallocated encodings generate different exception syndrome
44 * information from traps due to FP being disabled, we can't do a single
45 * "is fp access disabled" check at a high level in the decode tree.
46 * To help in catching bugs where the access check was forgotten in some
47 * code path, we set this flag when the access check is done, and assert
48 * that it is set at the point where we actually touch the FP regs.
50 bool fp_access_checked;
51 /* ARMv8 single-step state (this is distinct from the QEMU gdbstub
52 * single-step support).
56 /* True if the insn just emitted was a load-exclusive instruction
57 * (necessary for syndrome information for single step exceptions),
58 * ie A64 LDX*, LDAX*, A32/T32 LDREX*, LDAEX*.
61 /* True if a single-step exception will be taken to the current EL */
63 /* Bottom two bits of XScale c15_cpar coprocessor access control reg */
65 /* TCG op index of the current insn_start. */
67 #define TMP_A64_MAX 16
69 TCGv_i64 tmp_a64[TMP_A64_MAX];
72 typedef struct DisasCompare {
78 /* Share the TCG temporaries common between 32 and 64 bit modes. */
79 extern TCGv_env cpu_env;
80 extern TCGv_i32 cpu_NF, cpu_ZF, cpu_CF, cpu_VF;
81 extern TCGv_i64 cpu_exclusive_addr;
82 extern TCGv_i64 cpu_exclusive_val;
84 static inline int arm_dc_feature(DisasContext *dc, int feature)
86 return (dc->features & (1ULL << feature)) != 0;
89 static inline int get_mem_index(DisasContext *s)
94 /* Function used to determine the target exception EL when otherwise not known
97 static inline int default_exception_el(DisasContext *s)
99 /* If we are coming from secure EL0 in a system with a 32-bit EL3, then
100 * there is no secure EL1, so we route exceptions to EL3. Otherwise,
101 * exceptions can only be routed to ELs above 1, so we target the higher of
102 * 1 or the current EL.
104 return (s->mmu_idx == ARMMMUIdx_S1SE0 && s->secure_routed_to_el3)
105 ? 3 : MAX(1, s->current_el);
108 static void disas_set_insn_syndrome(DisasContext *s, uint32_t syn)
110 /* We don't need to save all of the syndrome so we mask and shift
111 * out unneeded bits to help the sleb128 encoder do a better job.
113 syn &= ARM_INSN_START_WORD2_MASK;
114 syn >>= ARM_INSN_START_WORD2_SHIFT;
116 /* We check and clear insn_start_idx to catch multiple updates. */
117 assert(s->insn_start_idx != 0);
118 tcg_set_insn_param(s->insn_start_idx, 2, syn);
119 s->insn_start_idx = 0;
122 /* target-specific extra values for is_jmp */
123 /* These instructions trap after executing, so the A32/T32 decoder must
124 * defer them until after the conditional execution state has been updated.
125 * WFI also needs special handling when single-stepping.
129 /* For instructions which unconditionally cause an exception we can skip
130 * emitting unreachable code at the end of the TB in the A64 decoder
137 #define DISAS_YIELD 10
138 /* M profile branch which might be an exception return (and so needs
139 * custom end-of-TB code)
141 #define DISAS_BX_EXCRET 11
143 #ifdef TARGET_AARCH64
144 void a64_translate_init(void);
145 void gen_intermediate_code_a64(ARMCPU *cpu, TranslationBlock *tb);
146 void gen_a64_set_pc_im(uint64_t val);
147 void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
148 fprintf_function cpu_fprintf, int flags);
150 static inline void a64_translate_init(void)
154 static inline void gen_intermediate_code_a64(ARMCPU *cpu, TranslationBlock *tb)
158 static inline void gen_a64_set_pc_im(uint64_t val)
162 static inline void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
163 fprintf_function cpu_fprintf,
169 void arm_test_cc(DisasCompare *cmp, int cc);
170 void arm_free_cc(DisasCompare *cmp);
171 void arm_jump_cc(DisasCompare *cmp, TCGLabel *label);
172 void arm_gen_test_cc(int cc, TCGLabel *label);
174 #endif /* TARGET_ARM_TRANSLATE_H */