2 * internal execution defines for qemu
4 * Copyright (c) 2003 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 /* allow to see translation results - the slowdown should be negligible, so we leave it */
25 #define xglue(x, y) x ## y
26 #define glue(x, y) xglue(x, y)
27 #define stringify(s) tostring(s)
28 #define tostring(s) #s
32 #define __builtin_expect(x, n) (x)
36 #define REGPARM(n) __attribute((regparm(n)))
41 /* is_jmp field values */
42 #define DISAS_NEXT 0 /* next instruction can be analyzed */
43 #define DISAS_JUMP 1 /* only pc was modified dynamically */
44 #define DISAS_UPDATE 2 /* cpu state was modified dynamically */
45 #define DISAS_TB_JUMP 3 /* only pc was modified statically */
47 struct TranslationBlock
;
49 /* XXX: make safe guess about sizes */
50 #define MAX_OP_PER_INSTR 32
51 #define OPC_BUF_SIZE 512
52 #define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
54 #define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * 3)
56 extern uint16_t gen_opc_buf
[OPC_BUF_SIZE
];
57 extern uint32_t gen_opparam_buf
[OPPARAM_BUF_SIZE
];
58 extern uint32_t gen_opc_pc
[OPC_BUF_SIZE
];
59 extern uint8_t gen_opc_cc_op
[OPC_BUF_SIZE
];
60 extern uint8_t gen_opc_instr_start
[OPC_BUF_SIZE
];
62 #if defined(TARGET_I386)
64 void optimize_flags_init(void);
71 int gen_intermediate_code(CPUState
*env
, struct TranslationBlock
*tb
);
72 int gen_intermediate_code_pc(CPUState
*env
, struct TranslationBlock
*tb
);
73 void dump_ops(const uint16_t *opc_buf
, const uint32_t *opparam_buf
);
74 int cpu_gen_code(CPUState
*env
, struct TranslationBlock
*tb
,
75 int max_code_size
, int *gen_code_size_ptr
);
76 int cpu_restore_state(struct TranslationBlock
*tb
,
77 CPUState
*env
, unsigned long searched_pc
);
78 void cpu_exec_init(void);
79 int page_unprotect(unsigned long address
);
80 void page_unmap(void);
81 void tlb_flush_page(CPUState
*env
, uint32_t addr
);
82 void tlb_flush(CPUState
*env
);
84 #define CODE_GEN_MAX_SIZE 65536
85 #define CODE_GEN_ALIGN 16 /* must be >= of the size of a icache line */
87 #define CODE_GEN_HASH_BITS 15
88 #define CODE_GEN_HASH_SIZE (1 << CODE_GEN_HASH_BITS)
90 /* maximum total translate dcode allocated */
91 #define CODE_GEN_BUFFER_SIZE (2048 * 1024)
92 //#define CODE_GEN_BUFFER_SIZE (128 * 1024)
94 #if defined(__powerpc__)
95 #define USE_DIRECT_JUMP
98 typedef struct TranslationBlock
{
99 unsigned long pc
; /* simulated PC corresponding to this block (EIP + CS base) */
100 unsigned long cs_base
; /* CS base for this block */
101 unsigned int flags
; /* flags defining in which context the code was generated */
102 uint16_t size
; /* size of target code for this block (1 <=
103 size <= TARGET_PAGE_SIZE) */
104 uint8_t *tc_ptr
; /* pointer to the translated code */
105 struct TranslationBlock
*hash_next
; /* next matching block */
106 struct TranslationBlock
*page_next
[2]; /* next blocks in even/odd page */
107 /* the following data are used to directly call another TB from
108 the code of this one. */
109 uint16_t tb_next_offset
[2]; /* offset of original jump target */
110 #ifdef USE_DIRECT_JUMP
111 uint16_t tb_jmp_offset
[2]; /* offset of jump instruction */
113 uint32_t tb_next
[2]; /* address of jump generated code */
115 /* list of TBs jumping to this one. This is a circular list using
116 the two least significant bits of the pointers to tell what is
117 the next pointer: 0 = jmp_next[0], 1 = jmp_next[1], 2 =
119 struct TranslationBlock
*jmp_next
[2];
120 struct TranslationBlock
*jmp_first
;
123 static inline unsigned int tb_hash_func(unsigned long pc
)
125 return pc
& (CODE_GEN_HASH_SIZE
- 1);
128 TranslationBlock
*tb_alloc(unsigned long pc
);
130 void tb_link(TranslationBlock
*tb
);
132 extern TranslationBlock
*tb_hash
[CODE_GEN_HASH_SIZE
];
134 extern uint8_t code_gen_buffer
[CODE_GEN_BUFFER_SIZE
];
135 extern uint8_t *code_gen_ptr
;
137 /* find a translation block in the translation cache. If not found,
138 return NULL and the pointer to the last element of the list in pptb */
139 static inline TranslationBlock
*tb_find(TranslationBlock
***pptb
,
141 unsigned long cs_base
,
144 TranslationBlock
**ptb
, *tb
;
147 h
= tb_hash_func(pc
);
153 if (tb
->pc
== pc
&& tb
->cs_base
== cs_base
&& tb
->flags
== flags
)
155 ptb
= &tb
->hash_next
;
161 #if defined(__powerpc__)
163 static inline void tb_set_jmp_target(TranslationBlock
*tb
,
164 int n
, unsigned long addr
)
167 unsigned long offset
;
169 offset
= (unsigned long)(tb
->tc_ptr
+ tb
->tb_jmp_offset
[n
]);
171 /* patch the branch destination */
172 ptr
= (uint32_t *)offset
;
174 val
= (val
& ~0x03fffffc) | ((addr
- offset
) & 0x03fffffc);
177 asm volatile ("dcbst 0,%0" : : "r"(ptr
) : "memory");
178 asm volatile ("sync" : : : "memory");
179 asm volatile ("icbi 0,%0" : : "r"(ptr
) : "memory");
180 asm volatile ("sync" : : : "memory");
181 asm volatile ("isync" : : : "memory");
186 /* set the jump target */
187 static inline void tb_set_jmp_target(TranslationBlock
*tb
,
188 int n
, unsigned long addr
)
190 tb
->tb_next
[n
] = addr
;
195 static inline void tb_add_jump(TranslationBlock
*tb
, int n
,
196 TranslationBlock
*tb_next
)
198 /* NOTE: this test is only needed for thread safety */
199 if (!tb
->jmp_next
[n
]) {
200 /* patch the native jump address */
201 tb_set_jmp_target(tb
, n
, (unsigned long)tb_next
->tc_ptr
);
203 /* add in TB jmp circular list */
204 tb
->jmp_next
[n
] = tb_next
->jmp_first
;
205 tb_next
->jmp_first
= (TranslationBlock
*)((long)(tb
) | (n
));
209 TranslationBlock
*tb_find_pc(unsigned long pc_ptr
);
212 #define offsetof(type, field) ((size_t) &((type *)0)->field)
215 #if defined(__powerpc__)
217 /* on PowerPC we patch the jump instruction directly */
218 #define JUMP_TB(opname, tbparam, n, eip)\
220 asm volatile (".section \".data\"\n"\
221 "__op_label" #n "." stringify(opname) ":\n"\
224 "b __op_jmp" #n "\n"\
226 T0 = (long)(tbparam) + (n);\
233 /* jump to next block operations (more portable code, does not need
234 cache flushing, but slower because of indirect jump) */
235 #define JUMP_TB(opname, tbparam, n, eip)\
237 static void __attribute__((unused)) *__op_label ## n = &&label ## n;\
238 static void __attribute__((unused)) *dummy ## n = &&dummy_label ## n;\
239 goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n]);\
241 T0 = (long)(tbparam) + (n);\
249 /* physical memory access */
250 #define IO_MEM_NB_ENTRIES 256
251 #define TLB_INVALID_MASK (1 << 3)
252 #define IO_MEM_SHIFT 4
253 #define IO_MEM_UNASSIGNED (1 << IO_MEM_SHIFT)
255 unsigned long physpage_find(unsigned long page
);
257 extern CPUWriteMemoryFunc
*io_mem_write
[IO_MEM_NB_ENTRIES
][4];
258 extern CPUReadMemoryFunc
*io_mem_read
[IO_MEM_NB_ENTRIES
][4];
261 static inline int testandset (int *p
)
264 __asm__
__volatile__ (
272 : "r" (p
), "r" (1), "r" (0)
279 static inline int testandset (int *p
)
284 __asm__
__volatile__ ("lock; cmpxchgl %3, %1; sete %0"
285 : "=q" (ret
), "=m" (*p
), "=a" (readval
)
286 : "r" (1), "m" (*p
), "a" (0)
293 static inline int testandset (int *p
)
297 __asm__
__volatile__ ("0: cs %0,%1,0(%2)\n"
300 : "r" (1), "a" (p
), "0" (*p
)
307 static inline int testandset (int *p
)
312 __asm__
__volatile__ ("0: mov 1,%2\n"
319 : "=r" (ret
), "=m" (*p
), "=r" (one
)
326 static inline int testandset (int *p
)
330 __asm__
__volatile__("ldstub [%1], %0"
335 return (ret
? 1 : 0);
340 static inline int testandset (int *spinlock
)
342 register unsigned int ret
;
343 __asm__
__volatile__("swp %0, %1, [%2]"
345 : "0"(1), "r"(spinlock
));
352 static inline int testandset (int *p
)
355 __asm__
__volatile__("tas %1; sne %0"
363 typedef int spinlock_t
;
365 #define SPIN_LOCK_UNLOCKED 0
368 static inline void spin_lock(spinlock_t
*lock
)
370 while (testandset(lock
));
373 static inline void spin_unlock(spinlock_t
*lock
)
378 static inline int spin_trylock(spinlock_t
*lock
)
380 return !testandset(lock
);
383 static inline void spin_lock(spinlock_t
*lock
)
387 static inline void spin_unlock(spinlock_t
*lock
)
391 static inline int spin_trylock(spinlock_t
*lock
)
397 extern spinlock_t tb_lock
;