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[4]; /* 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_target1(unsigned long jmp_addr, unsigned long addr)
167 /* patch the branch destination */
168 ptr = (uint32_t *)jmp_addr;
170 val = (val & ~0x03fffffc) | ((addr - jmp_addr) & 0x03fffffc);
173 asm volatile ("dcbst 0,%0" : : "r"(ptr) : "memory");
174 asm volatile ("sync" : : : "memory");
175 asm volatile ("icbi 0,%0" : : "r"(ptr) : "memory");
176 asm volatile ("sync" : : : "memory");
177 asm volatile ("isync" : : : "memory");
180 static inline void tb_set_jmp_target(TranslationBlock *tb,
181 int n, unsigned long addr)
183 unsigned long offset;
185 offset = tb->tb_jmp_offset[n];
186 tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
187 offset = tb->tb_jmp_offset[n + 2];
188 if (offset != 0xffff)
189 tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
194 /* set the jump target */
195 static inline void tb_set_jmp_target(TranslationBlock *tb,
196 int n, unsigned long addr)
198 tb->tb_next[n] = addr;
203 static inline void tb_add_jump(TranslationBlock *tb, int n,
204 TranslationBlock *tb_next)
206 /* NOTE: this test is only needed for thread safety */
207 if (!tb->jmp_next[n]) {
208 /* patch the native jump address */
209 tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr);
211 /* add in TB jmp circular list */
212 tb->jmp_next[n] = tb_next->jmp_first;
213 tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n));
217 TranslationBlock *tb_find_pc(unsigned long pc_ptr);
220 #define offsetof(type, field) ((size_t) &((type *)0)->field)
223 #if defined(__powerpc__)
225 /* on PowerPC we patch the jump instruction directly */
226 #define JUMP_TB(opname, tbparam, n, eip)\
228 asm volatile (".section \".data\"\n"\
229 "__op_label" #n "." stringify(opname) ":\n"\
232 "b __op_jmp" #n "\n"\
234 T0 = (long)(tbparam) + (n);\
239 #define JUMP_TB2(opname, tbparam, n)\
241 asm volatile ("b __op_jmp%0\n" : : "i" (n + 2));\
246 /* jump to next block operations (more portable code, does not need
247 cache flushing, but slower because of indirect jump) */
248 #define JUMP_TB(opname, tbparam, n, eip)\
250 static void __attribute__((unused)) *__op_label ## n = &&label ## n;\
251 static void __attribute__((unused)) *dummy ## n = &&dummy_label ## n;\
252 goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n]);\
254 T0 = (long)(tbparam) + (n);\
260 /* second jump to same destination 'n' */
261 #define JUMP_TB2(opname, tbparam, n)\
263 goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n]);\
268 /* physical memory access */
269 #define IO_MEM_NB_ENTRIES 256
270 #define TLB_INVALID_MASK (1 << 3)
271 #define IO_MEM_SHIFT 4
272 #define IO_MEM_UNASSIGNED (1 << IO_MEM_SHIFT)
274 unsigned long physpage_find(unsigned long page);
276 extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
277 extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
280 static inline int testandset (int *p)
283 __asm__ __volatile__ (
291 : "r" (p), "r" (1), "r" (0)
298 static inline int testandset (int *p)
303 __asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0"
304 : "=q" (ret), "=m" (*p), "=a" (readval)
305 : "r" (1), "m" (*p), "a" (0)
312 static inline int testandset (int *p)
316 __asm__ __volatile__ ("0: cs %0,%1,0(%2)\n"
319 : "r" (1), "a" (p), "0" (*p)
326 static inline int testandset (int *p)
331 __asm__ __volatile__ ("0: mov 1,%2\n"
338 : "=r" (ret), "=m" (*p), "=r" (one)
345 static inline int testandset (int *p)
349 __asm__ __volatile__("ldstub [%1], %0"
354 return (ret ? 1 : 0);
359 static inline int testandset (int *spinlock)
361 register unsigned int ret;
362 __asm__ __volatile__("swp %0, %1, [%2]"
364 : "0"(1), "r"(spinlock));
371 static inline int testandset (int *p)
374 __asm__ __volatile__("tas %1; sne %0"
382 typedef int spinlock_t;
384 #define SPIN_LOCK_UNLOCKED 0
387 static inline void spin_lock(spinlock_t *lock)
389 while (testandset(lock));
392 static inline void spin_unlock(spinlock_t *lock)
397 static inline int spin_trylock(spinlock_t *lock)
399 return !testandset(lock);
402 static inline void spin_lock(spinlock_t *lock)
406 static inline void spin_unlock(spinlock_t *lock)
410 static inline int spin_trylock(spinlock_t *lock)
416 extern spinlock_t tb_lock;