1 #ifndef TARGET_ARM_TRANSLATE_H
2 #define TARGET_ARM_TRANSLATE_H
4 #include "exec/translator.h"
8 typedef struct DisasContext {
12 target_ulong next_page_start;
14 /* Nonzero if this instruction has been conditionally skipped. */
16 /* The label that will be jumped to when the instruction is skipped. */
18 /* Thumb-2 conditional execution bits. */
24 #if !defined(CONFIG_USER_ONLY)
27 ARMMMUIdx mmu_idx; /* MMU index to use for normal loads/stores */
28 bool tbi0; /* TBI0 for EL0/1 or TBI for EL2/3 */
29 bool tbi1; /* TBI1 for EL0/1, not used for EL2/3 */
30 bool ns; /* Use non-secure CPREG bank on access */
31 int fp_excp_el; /* FP exception EL or 0 if enabled */
32 /* Flag indicating that exceptions from secure mode are routed to EL3. */
33 bool secure_routed_to_el3;
34 bool vfp_enabled; /* FP enabled via FPSCR.EN */
37 bool v7m_handler_mode;
38 bool v8m_secure; /* true if v8M and we're in Secure mode */
39 /* Immediate value in AArch32 SVC insn; must be set if is_jmp == DISAS_SWI
40 * so that top level loop can generate correct syndrome information.
46 uint64_t features; /* CPU features bits */
47 /* Because unallocated encodings generate different exception syndrome
48 * information from traps due to FP being disabled, we can't do a single
49 * "is fp access disabled" check at a high level in the decode tree.
50 * To help in catching bugs where the access check was forgotten in some
51 * code path, we set this flag when the access check is done, and assert
52 * that it is set at the point where we actually touch the FP regs.
54 bool fp_access_checked;
55 /* ARMv8 single-step state (this is distinct from the QEMU gdbstub
56 * single-step support).
60 /* True if the insn just emitted was a load-exclusive instruction
61 * (necessary for syndrome information for single step exceptions),
62 * ie A64 LDX*, LDAX*, A32/T32 LDREX*, LDAEX*.
65 /* True if a single-step exception will be taken to the current EL */
67 /* Bottom two bits of XScale c15_cpar coprocessor access control reg */
69 /* TCG op index of the current insn_start. */
71 #define TMP_A64_MAX 16
73 TCGv_i64 tmp_a64[TMP_A64_MAX];
76 typedef struct DisasCompare {
82 /* Share the TCG temporaries common between 32 and 64 bit modes. */
83 extern TCGv_i32 cpu_NF, cpu_ZF, cpu_CF, cpu_VF;
84 extern TCGv_i64 cpu_exclusive_addr;
85 extern TCGv_i64 cpu_exclusive_val;
87 static inline int arm_dc_feature(DisasContext *dc, int feature)
89 return (dc->features & (1ULL << feature)) != 0;
92 static inline int get_mem_index(DisasContext *s)
94 return arm_to_core_mmu_idx(s->mmu_idx);
97 /* Function used to determine the target exception EL when otherwise not known
100 static inline int default_exception_el(DisasContext *s)
102 /* If we are coming from secure EL0 in a system with a 32-bit EL3, then
103 * there is no secure EL1, so we route exceptions to EL3. Otherwise,
104 * exceptions can only be routed to ELs above 1, so we target the higher of
105 * 1 or the current EL.
107 return (s->mmu_idx == ARMMMUIdx_S1SE0 && s->secure_routed_to_el3)
108 ? 3 : MAX(1, s->current_el);
111 static void disas_set_insn_syndrome(DisasContext *s, uint32_t syn)
113 /* We don't need to save all of the syndrome so we mask and shift
114 * out unneeded bits to help the sleb128 encoder do a better job.
116 syn &= ARM_INSN_START_WORD2_MASK;
117 syn >>= ARM_INSN_START_WORD2_SHIFT;
119 /* We check and clear insn_start_idx to catch multiple updates. */
120 assert(s->insn_start_idx != 0);
121 tcg_set_insn_param(s->insn_start_idx, 2, syn);
122 s->insn_start_idx = 0;
125 /* is_jmp field values */
126 #define DISAS_JUMP DISAS_TARGET_0 /* only pc was modified dynamically */
127 #define DISAS_UPDATE DISAS_TARGET_1 /* cpu state was modified dynamically */
128 /* These instructions trap after executing, so the A32/T32 decoder must
129 * defer them until after the conditional execution state has been updated.
130 * WFI also needs special handling when single-stepping.
132 #define DISAS_WFI DISAS_TARGET_2
133 #define DISAS_SWI DISAS_TARGET_3
135 #define DISAS_WFE DISAS_TARGET_4
136 #define DISAS_HVC DISAS_TARGET_5
137 #define DISAS_SMC DISAS_TARGET_6
138 #define DISAS_YIELD DISAS_TARGET_7
139 /* M profile branch which might be an exception return (and so needs
140 * custom end-of-TB code)
142 #define DISAS_BX_EXCRET DISAS_TARGET_8
143 /* For instructions which want an immediate exit to the main loop,
144 * as opposed to attempting to use lookup_and_goto_ptr. Unlike
145 * DISAS_UPDATE this doesn't write the PC on exiting the translation
146 * loop so you need to ensure something (gen_a64_set_pc_im or runtime
147 * helper) has done so before we reach return from cpu_tb_exec.
149 #define DISAS_EXIT DISAS_TARGET_9
151 #ifdef TARGET_AARCH64
152 void a64_translate_init(void);
153 void gen_a64_set_pc_im(uint64_t val);
154 void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
155 fprintf_function cpu_fprintf, int flags);
156 extern const TranslatorOps aarch64_translator_ops;
158 static inline void a64_translate_init(void)
162 static inline void gen_a64_set_pc_im(uint64_t val)
166 static inline void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
167 fprintf_function cpu_fprintf,
173 void arm_test_cc(DisasCompare *cmp, int cc);
174 void arm_free_cc(DisasCompare *cmp);
175 void arm_jump_cc(DisasCompare *cmp, TCGLabel *label);
176 void arm_gen_test_cc(int cc, TCGLabel *label);
178 #endif /* TARGET_ARM_TRANSLATE_H */