target-arm/translate.h

   1 #ifndef TARGET_ARM_TRANSLATE_H
   2 #define TARGET_ARM_TRANSLATE_H
   3
   4 /* internal defines */
   5 typedef struct DisasContext {
   6     target_ulong pc;
   7     uint32_t insn;
   8     int is_jmp;
   9     /* Nonzero if this instruction has been conditionally skipped.  */
  10     int condjmp;
  11     /* The label that will be jumped to when the instruction is skipped.  */
  12     int condlabel;
  13     /* Thumb-2 conditional execution bits.  */
  14     int condexec_mask;
  15     int condexec_cond;
  16     struct TranslationBlock *tb;
  17     int singlestep_enabled;
  18     int thumb;
  19     int bswap_code;
  20 #if !defined(CONFIG_USER_ONLY)
  21     int user;
  22 #endif
  23     bool cpacr_fpen; /* FP enabled via CPACR.FPEN */
  24     bool vfp_enabled; /* FP enabled via FPSCR.EN */
  25     int vec_len;
  26     int vec_stride;
  27     /* Immediate value in AArch32 SVC insn; must be set if is_jmp == DISAS_SWI
  28      * so that top level loop can generate correct syndrome information.
  29      */
  30     uint32_t svc_imm;
  31     int aarch64;
  32     int current_pl;
  33     GHashTable *cp_regs;
  34     uint64_t features; /* CPU features bits */
  35     /* Because unallocated encodings generate different exception syndrome
  36      * information from traps due to FP being disabled, we can't do a single
  37      * "is fp access disabled" check at a high level in the decode tree.
  38      * To help in catching bugs where the access check was forgotten in some
  39      * code path, we set this flag when the access check is done, and assert
  40      * that it is set at the point where we actually touch the FP regs.
  41      */
  42     bool fp_access_checked;
  43     /* ARMv8 single-step state (this is distinct from the QEMU gdbstub
  44      * single-step support).
  45      */
  46     bool ss_active;
  47     bool pstate_ss;
  48     /* True if the insn just emitted was a load-exclusive instruction
  49      * (necessary for syndrome information for single step exceptions),
  50      * ie A64 LDX*, LDAX*, A32/T32 LDREX*, LDAEX*.
  51      */
  52     bool is_ldex;
  53     /* True if a single-step exception will be taken to the current EL */
  54     bool ss_same_el;
  55 #define TMP_A64_MAX 16
  56     int tmp_a64_count;
  57     TCGv_i64 tmp_a64[TMP_A64_MAX];
  58 } DisasContext;
  59
  60 extern TCGv_ptr cpu_env;
  61
  62 static inline int arm_dc_feature(DisasContext *dc, int feature)
  63 {
  64     return (dc->features & (1ULL << feature)) != 0;
  65 }
  66
  67 static inline int get_mem_index(DisasContext *s)
  68 {
  69     return s->current_pl;
  70 }
  71
  72 /* target-specific extra values for is_jmp */
  73 /* These instructions trap after executing, so the A32/T32 decoder must
  74  * defer them until after the conditional execution state has been updated.
  75  * WFI also needs special handling when single-stepping.
  76  */
  77 #define DISAS_WFI 4
  78 #define DISAS_SWI 5
  79 /* For instructions which unconditionally cause an exception we can skip
  80  * emitting unreachable code at the end of the TB in the A64 decoder
  81  */
  82 #define DISAS_EXC 6
  83 /* WFE */
  84 #define DISAS_WFE 7
  85
  86 #ifdef TARGET_AARCH64
  87 void a64_translate_init(void);
  88 void gen_intermediate_code_internal_a64(ARMCPU *cpu,
  89                                         TranslationBlock *tb,
  90                                         bool search_pc);
  91 void gen_a64_set_pc_im(uint64_t val);
  92 void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
  93                             fprintf_function cpu_fprintf, int flags);
  94 #else
  95 static inline void a64_translate_init(void)
  96 {
  97 }
  98
  99 static inline void gen_intermediate_code_internal_a64(ARMCPU *cpu,
 100                                                       TranslationBlock *tb,
 101                                                       bool search_pc)
 102 {
 103 }
 104
 105 static inline void gen_a64_set_pc_im(uint64_t val)
 106 {
 107 }
 108
 109 static inline void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
 110                                           fprintf_function cpu_fprintf,
 111                                           int flags)
 112 {
 113 }
 114 #endif
 115
 116 void arm_gen_test_cc(int cc, int label);
 117
 118 #endif /* TARGET_ARM_TRANSLATE_H */