LXR qemu/target-arm/translate.h

   1#ifndef TARGET_ARM_TRANSLATE_H
   2#define TARGET_ARM_TRANSLATE_H
   3
   4/* internal defines */
   5typedef 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    TCGLabel *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 sctlr_b;
  20    TCGMemOp be_data;
  21#if !defined(CONFIG_USER_ONLY)
  22    int user;
  23#endif
  24    ARMMMUIdx mmu_idx; /* MMU index to use for normal loads/stores */
  25    bool ns;        /* Use non-secure CPREG bank on access */
  26    int fp_excp_el; /* FP exception EL or 0 if enabled */
  27    /* Flag indicating that exceptions from secure mode are routed to EL3. */
  28    bool secure_routed_to_el3;
  29    bool vfp_enabled; /* FP enabled via FPSCR.EN */
  30    int vec_len;
  31    int vec_stride;
  32    /* Immediate value in AArch32 SVC insn; must be set if is_jmp == DISAS_SWI
  33     * so that top level loop can generate correct syndrome information.
  34     */
  35    uint32_t svc_imm;
  36    int aarch64;
  37    int current_el;
  38    GHashTable *cp_regs;
  39    uint64_t features; /* CPU features bits */
  40    /* Because unallocated encodings generate different exception syndrome
  41     * information from traps due to FP being disabled, we can't do a single
  42     * "is fp access disabled" check at a high level in the decode tree.
  43     * To help in catching bugs where the access check was forgotten in some
  44     * code path, we set this flag when the access check is done, and assert
  45     * that it is set at the point where we actually touch the FP regs.
  46     */
  47    bool fp_access_checked;
  48    /* ARMv8 single-step state (this is distinct from the QEMU gdbstub
  49     * single-step support).
  50     */
  51    bool ss_active;
  52    bool pstate_ss;
  53    /* True if the insn just emitted was a load-exclusive instruction
  54     * (necessary for syndrome information for single step exceptions),
  55     * ie A64 LDX*, LDAX*, A32/T32 LDREX*, LDAEX*.
  56     */
  57    bool is_ldex;
  58    /* True if a single-step exception will be taken to the current EL */
  59    bool ss_same_el;
  60    /* Bottom two bits of XScale c15_cpar coprocessor access control reg */
  61    int c15_cpar;
  62#define TMP_A64_MAX 16
  63    int tmp_a64_count;
  64    TCGv_i64 tmp_a64[TMP_A64_MAX];
  65} DisasContext;
  66
  67typedef struct DisasCompare {
  68    TCGCond cond;
  69    TCGv_i32 value;
  70    bool value_global;
  71} DisasCompare;
  72
  73/* Share the TCG temporaries common between 32 and 64 bit modes.  */
  74extern TCGv_env cpu_env;
  75extern TCGv_i32 cpu_NF, cpu_ZF, cpu_CF, cpu_VF;
  76extern TCGv_i64 cpu_exclusive_addr;
  77extern TCGv_i64 cpu_exclusive_val;
  78#ifdef CONFIG_USER_ONLY
  79extern TCGv_i64 cpu_exclusive_test;
  80extern TCGv_i32 cpu_exclusive_info;
  81#endif
  82
  83static inline int arm_dc_feature(DisasContext *dc, int feature)
  84{
  85    return (dc->features & (1ULL << feature)) != 0;
  86}
  87
  88static inline int get_mem_index(DisasContext *s)
  89{
  90    return s->mmu_idx;
  91}
  92
  93/* Function used to determine the target exception EL when otherwise not known
  94 * or default.
  95 */
  96static inline int default_exception_el(DisasContext *s)
  97{
  98    /* If we are coming from secure EL0 in a system with a 32-bit EL3, then
  99     * there is no secure EL1, so we route exceptions to EL3.  Otherwise,
 100     * exceptions can only be routed to ELs above 1, so we target the higher of
 101     * 1 or the current EL.
 102     */
 103    return (s->mmu_idx == ARMMMUIdx_S1SE0 && s->secure_routed_to_el3)
 104            ? 3 : MAX(1, s->current_el);
 105}
 106
 107/* target-specific extra values for is_jmp */
 108/* These instructions trap after executing, so the A32/T32 decoder must
 109 * defer them until after the conditional execution state has been updated.
 110 * WFI also needs special handling when single-stepping.
 111 */
 112#define DISAS_WFI 4
 113#define DISAS_SWI 5
 114/* For instructions which unconditionally cause an exception we can skip
 115 * emitting unreachable code at the end of the TB in the A64 decoder
 116 */
 117#define DISAS_EXC 6
 118/* WFE */
 119#define DISAS_WFE 7
 120#define DISAS_HVC 8
 121#define DISAS_SMC 9
 122#define DISAS_YIELD 10
 123
 124#ifdef TARGET_AARCH64
 125void a64_translate_init(void);
 126void gen_intermediate_code_a64(ARMCPU *cpu, TranslationBlock *tb);
 127void gen_a64_set_pc_im(uint64_t val);
 128void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
 129                            fprintf_function cpu_fprintf, int flags);
 130#else
 131static inline void a64_translate_init(void)
 132{
 133}
 134
 135static inline void gen_intermediate_code_a64(ARMCPU *cpu, TranslationBlock *tb)
 136{
 137}
 138
 139static inline void gen_a64_set_pc_im(uint64_t val)
 140{
 141}
 142
 143static inline void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
 144                                          fprintf_function cpu_fprintf,
 145                                          int flags)
 146{
 147}
 148#endif
 149
 150void arm_test_cc(DisasCompare *cmp, int cc);
 151void arm_free_cc(DisasCompare *cmp);
 152void arm_jump_cc(DisasCompare *cmp, TCGLabel *label);
 153void arm_gen_test_cc(int cc, TCGLabel *label);
 154
 155#endif /* TARGET_ARM_TRANSLATE_H */
 156