virtio-scsi: suppress virtqueue kick during processing
[qemu.git] / 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 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 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 */
32 int vec_len;
33 int vec_stride;
34 /* Immediate value in AArch32 SVC insn; must be set if is_jmp == DISAS_SWI
35 * so that top level loop can generate correct syndrome information.
36 */
37 uint32_t svc_imm;
38 int aarch64;
39 int current_el;
40 GHashTable *cp_regs;
41 uint64_t features; /* CPU features bits */
42 /* Because unallocated encodings generate different exception syndrome
43 * information from traps due to FP being disabled, we can't do a single
44 * "is fp access disabled" check at a high level in the decode tree.
45 * To help in catching bugs where the access check was forgotten in some
46 * code path, we set this flag when the access check is done, and assert
47 * that it is set at the point where we actually touch the FP regs.
48 */
49 bool fp_access_checked;
50 /* ARMv8 single-step state (this is distinct from the QEMU gdbstub
51 * single-step support).
52 */
53 bool ss_active;
54 bool pstate_ss;
55 /* True if the insn just emitted was a load-exclusive instruction
56 * (necessary for syndrome information for single step exceptions),
57 * ie A64 LDX*, LDAX*, A32/T32 LDREX*, LDAEX*.
58 */
59 bool is_ldex;
60 /* True if a single-step exception will be taken to the current EL */
61 bool ss_same_el;
62 /* Bottom two bits of XScale c15_cpar coprocessor access control reg */
63 int c15_cpar;
64 /* TCG op index of the current insn_start. */
65 int insn_start_idx;
66 #define TMP_A64_MAX 16
67 int tmp_a64_count;
68 TCGv_i64 tmp_a64[TMP_A64_MAX];
69 } DisasContext;
70
71 typedef struct DisasCompare {
72 TCGCond cond;
73 TCGv_i32 value;
74 bool value_global;
75 } DisasCompare;
76
77 /* Share the TCG temporaries common between 32 and 64 bit modes. */
78 extern TCGv_env cpu_env;
79 extern TCGv_i32 cpu_NF, cpu_ZF, cpu_CF, cpu_VF;
80 extern TCGv_i64 cpu_exclusive_addr;
81 extern TCGv_i64 cpu_exclusive_val;
82
83 static inline int arm_dc_feature(DisasContext *dc, int feature)
84 {
85 return (dc->features & (1ULL << feature)) != 0;
86 }
87
88 static 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 */
96 static 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
125 void a64_translate_init(void);
126 void gen_intermediate_code_a64(ARMCPU *cpu, TranslationBlock *tb);
127 void gen_a64_set_pc_im(uint64_t val);
128 void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
129 fprintf_function cpu_fprintf, int flags);
130 #else
131 static inline void a64_translate_init(void)
132 {
133 }
134
135 static inline void gen_intermediate_code_a64(ARMCPU *cpu, TranslationBlock *tb)
136 {
137 }
138
139 static inline void gen_a64_set_pc_im(uint64_t val)
140 {
141 }
142
143 static inline void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
144 fprintf_function cpu_fprintf,
145 int flags)
146 {
147 }
148 #endif
149
150 void arm_test_cc(DisasCompare *cmp, int cc);
151 void arm_free_cc(DisasCompare *cmp);
152 void arm_jump_cc(DisasCompare *cmp, TCGLabel *label);
153 void arm_gen_test_cc(int cc, TCGLabel *label);
154
155 #endif /* TARGET_ARM_TRANSLATE_H */