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 typedef void (GenOpFunc)(void);
63 typedef void (GenOpFunc1)(long);
64 typedef void (GenOpFunc2)(long, long);
65 typedef void (GenOpFunc3)(long, long, long);
67 #if defined(TARGET_I386)
69 void optimize_flags_init(void);
76 int gen_intermediate_code(CPUState *env, struct TranslationBlock *tb);
77 int gen_intermediate_code_pc(CPUState *env, struct TranslationBlock *tb);
78 void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf);
79 int cpu_gen_code(CPUState *env, struct TranslationBlock *tb,
80 int max_code_size, int *gen_code_size_ptr);
81 int cpu_restore_state(struct TranslationBlock *tb,
82 CPUState *env, unsigned long searched_pc,
84 int cpu_gen_code_copy(CPUState *env, struct TranslationBlock *tb,
85 int max_code_size, int *gen_code_size_ptr);
86 int cpu_restore_state_copy(struct TranslationBlock *tb,
87 CPUState *env, unsigned long searched_pc,
89 void cpu_resume_from_signal(CPUState *env1, void *puc);
90 void cpu_exec_init(void);
91 int page_unprotect(unsigned long address, unsigned long pc, void *puc);
92 void tb_invalidate_phys_page_range(target_ulong start, target_ulong end,
93 int is_cpu_write_access);
94 void tb_invalidate_page_range(target_ulong start, target_ulong end);
95 void tlb_flush_page(CPUState *env, target_ulong addr);
96 void tlb_flush(CPUState *env, int flush_global);
97 int tlb_set_page(CPUState *env, target_ulong vaddr,
98 target_phys_addr_t paddr, int prot,
99 int is_user, int is_softmmu);
101 #define CODE_GEN_MAX_SIZE 65536
102 #define CODE_GEN_ALIGN 16 /* must be >= of the size of a icache line */
104 #define CODE_GEN_HASH_BITS 15
105 #define CODE_GEN_HASH_SIZE (1 << CODE_GEN_HASH_BITS)
107 #define CODE_GEN_PHYS_HASH_BITS 15
108 #define CODE_GEN_PHYS_HASH_SIZE (1 << CODE_GEN_PHYS_HASH_BITS)
110 /* maximum total translate dcode allocated */
112 /* NOTE: the translated code area cannot be too big because on some
113 archs the range of "fast" function calls is limited. Here is a
114 summary of the ranges:
116 i386 : signed 32 bits
119 sparc : signed 32 bits
120 alpha : signed 23 bits
123 #if defined(__alpha__)
124 #define CODE_GEN_BUFFER_SIZE (2 * 1024 * 1024)
125 #elif defined(__powerpc__)
126 #define CODE_GEN_BUFFER_SIZE (6 * 1024 * 1024)
128 #define CODE_GEN_BUFFER_SIZE (8 * 1024 * 1024)
131 //#define CODE_GEN_BUFFER_SIZE (128 * 1024)
133 /* estimated block size for TB allocation */
134 /* XXX: use a per code average code fragment size and modulate it
135 according to the host CPU */
136 #if defined(CONFIG_SOFTMMU)
137 #define CODE_GEN_AVG_BLOCK_SIZE 128
139 #define CODE_GEN_AVG_BLOCK_SIZE 64
142 #define CODE_GEN_MAX_BLOCKS (CODE_GEN_BUFFER_SIZE / CODE_GEN_AVG_BLOCK_SIZE)
144 #if defined(__powerpc__)
145 #define USE_DIRECT_JUMP
147 #if defined(__i386__) && !defined(_WIN32)
148 #define USE_DIRECT_JUMP
151 typedef struct TranslationBlock {
152 target_ulong pc; /* simulated PC corresponding to this block (EIP + CS base) */
153 target_ulong cs_base; /* CS base for this block */
154 unsigned int flags; /* flags defining in which context the code was generated */
155 uint16_t size; /* size of target code for this block (1 <=
156 size <= TARGET_PAGE_SIZE) */
157 uint16_t cflags; /* compile flags */
158 #define CF_CODE_COPY 0x0001 /* block was generated in code copy mode */
159 #define CF_TB_FP_USED 0x0002 /* fp ops are used in the TB */
160 #define CF_FP_USED 0x0004 /* fp ops are used in the TB or in a chained TB */
161 #define CF_SINGLE_INSN 0x0008 /* compile only a single instruction */
163 uint8_t *tc_ptr; /* pointer to the translated code */
164 struct TranslationBlock *hash_next; /* next matching tb for virtual address */
165 /* next matching tb for physical address. */
166 struct TranslationBlock *phys_hash_next;
167 /* first and second physical page containing code. The lower bit
168 of the pointer tells the index in page_next[] */
169 struct TranslationBlock *page_next[2];
170 target_ulong page_addr[2];
172 /* the following data are used to directly call another TB from
173 the code of this one. */
174 uint16_t tb_next_offset[2]; /* offset of original jump target */
175 #ifdef USE_DIRECT_JUMP
176 uint16_t tb_jmp_offset[4]; /* offset of jump instruction */
178 uint32_t tb_next[2]; /* address of jump generated code */
180 /* list of TBs jumping to this one. This is a circular list using
181 the two least significant bits of the pointers to tell what is
182 the next pointer: 0 = jmp_next[0], 1 = jmp_next[1], 2 =
184 struct TranslationBlock *jmp_next[2];
185 struct TranslationBlock *jmp_first;
188 static inline unsigned int tb_hash_func(unsigned long pc)
190 return pc & (CODE_GEN_HASH_SIZE - 1);
193 static inline unsigned int tb_phys_hash_func(unsigned long pc)
195 return pc & (CODE_GEN_PHYS_HASH_SIZE - 1);
198 TranslationBlock *tb_alloc(unsigned long pc);
199 void tb_flush(CPUState *env);
200 void tb_link(TranslationBlock *tb);
201 void tb_link_phys(TranslationBlock *tb,
202 target_ulong phys_pc, target_ulong phys_page2);
204 extern TranslationBlock *tb_hash[CODE_GEN_HASH_SIZE];
205 extern TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
207 extern uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE];
208 extern uint8_t *code_gen_ptr;
210 /* find a translation block in the translation cache. If not found,
211 return NULL and the pointer to the last element of the list in pptb */
212 static inline TranslationBlock *tb_find(TranslationBlock ***pptb,
214 target_ulong cs_base,
217 TranslationBlock **ptb, *tb;
220 h = tb_hash_func(pc);
226 if (tb->pc == pc && tb->cs_base == cs_base && tb->flags == flags)
228 ptb = &tb->hash_next;
235 #if defined(USE_DIRECT_JUMP)
237 #if defined(__powerpc__)
238 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
242 /* patch the branch destination */
243 ptr = (uint32_t *)jmp_addr;
245 val = (val & ~0x03fffffc) | ((addr - jmp_addr) & 0x03fffffc);
248 asm volatile ("dcbst 0,%0" : : "r"(ptr) : "memory");
249 asm volatile ("sync" : : : "memory");
250 asm volatile ("icbi 0,%0" : : "r"(ptr) : "memory");
251 asm volatile ("sync" : : : "memory");
252 asm volatile ("isync" : : : "memory");
254 #elif defined(__i386__)
255 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
257 /* patch the branch destination */
258 *(uint32_t *)jmp_addr = addr - (jmp_addr + 4);
259 /* no need to flush icache explicitely */
263 static inline void tb_set_jmp_target(TranslationBlock *tb,
264 int n, unsigned long addr)
266 unsigned long offset;
268 offset = tb->tb_jmp_offset[n];
269 tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
270 offset = tb->tb_jmp_offset[n + 2];
271 if (offset != 0xffff)
272 tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
277 /* set the jump target */
278 static inline void tb_set_jmp_target(TranslationBlock *tb,
279 int n, unsigned long addr)
281 tb->tb_next[n] = addr;
286 static inline void tb_add_jump(TranslationBlock *tb, int n,
287 TranslationBlock *tb_next)
289 /* NOTE: this test is only needed for thread safety */
290 if (!tb->jmp_next[n]) {
291 /* patch the native jump address */
292 tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr);
294 /* add in TB jmp circular list */
295 tb->jmp_next[n] = tb_next->jmp_first;
296 tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n));
300 TranslationBlock *tb_find_pc(unsigned long pc_ptr);
303 #define offsetof(type, field) ((size_t) &((type *)0)->field)
307 #define ASM_DATA_SECTION ".section \".data\"\n"
308 #define ASM_PREVIOUS_SECTION ".section .text\n"
309 #elif defined(__APPLE__)
310 #define ASM_DATA_SECTION ".data\n"
311 #define ASM_PREVIOUS_SECTION ".text\n"
312 #define ASM_NAME(x) "_" #x
314 #define ASM_DATA_SECTION ".section \".data\"\n"
315 #define ASM_PREVIOUS_SECTION ".previous\n"
316 #define ASM_NAME(x) stringify(x)
319 #if defined(__powerpc__)
321 /* we patch the jump instruction directly */
322 #define JUMP_TB(opname, tbparam, n, eip)\
324 asm volatile (ASM_DATA_SECTION\
325 ASM_NAME(__op_label) #n "." ASM_NAME(opname) ":\n"\
327 ASM_PREVIOUS_SECTION \
328 "b " ASM_NAME(__op_jmp) #n "\n"\
330 T0 = (long)(tbparam) + (n);\
335 #define JUMP_TB2(opname, tbparam, n)\
337 asm volatile ("b " ASM_NAME(__op_jmp) #n "\n");\
340 #elif defined(__i386__) && defined(USE_DIRECT_JUMP)
342 /* we patch the jump instruction directly */
343 #define JUMP_TB(opname, tbparam, n, eip)\
345 asm volatile (".section .data\n"\
346 ASM_NAME(__op_label) #n "." ASM_NAME(opname) ":\n"\
348 ASM_PREVIOUS_SECTION \
349 "jmp " ASM_NAME(__op_jmp) #n "\n"\
351 T0 = (long)(tbparam) + (n);\
356 #define JUMP_TB2(opname, tbparam, n)\
358 asm volatile ("jmp " ASM_NAME(__op_jmp) #n "\n");\
363 /* jump to next block operations (more portable code, does not need
364 cache flushing, but slower because of indirect jump) */
365 #define JUMP_TB(opname, tbparam, n, eip)\
367 static void __attribute__((unused)) *__op_label ## n = &&label ## n;\
368 static void __attribute__((unused)) *dummy ## n = &&dummy_label ## n;\
369 goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n]);\
371 T0 = (long)(tbparam) + (n);\
377 /* second jump to same destination 'n' */
378 #define JUMP_TB2(opname, tbparam, n)\
380 goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n - 2]);\
385 extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
386 extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
387 extern void *io_mem_opaque[IO_MEM_NB_ENTRIES];
390 static inline int testandset (int *p)
393 __asm__ __volatile__ (
401 : "r" (p), "r" (1), "r" (0)
408 static inline int testandset (int *p)
413 __asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0"
414 : "=q" (ret), "=m" (*p), "=a" (readval)
415 : "r" (1), "m" (*p), "a" (0)
422 static inline int testandset (int *p)
427 __asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0"
428 : "=q" (ret), "=m" (*p), "=a" (readval)
429 : "r" (1), "m" (*p), "a" (0)
436 static inline int testandset (int *p)
440 __asm__ __volatile__ ("0: cs %0,%1,0(%2)\n"
443 : "r" (1), "a" (p), "0" (*p)
450 static inline int testandset (int *p)
455 __asm__ __volatile__ ("0: mov 1,%2\n"
462 : "=r" (ret), "=m" (*p), "=r" (one)
469 static inline int testandset (int *p)
473 __asm__ __volatile__("ldstub [%1], %0"
478 return (ret ? 1 : 0);
483 static inline int testandset (int *spinlock)
485 register unsigned int ret;
486 __asm__ __volatile__("swp %0, %1, [%2]"
488 : "0"(1), "r"(spinlock));
495 static inline int testandset (int *p)
498 __asm__ __volatile__("tas %1; sne %0"
506 typedef int spinlock_t;
508 #define SPIN_LOCK_UNLOCKED 0
510 #if defined(CONFIG_USER_ONLY)
511 static inline void spin_lock(spinlock_t *lock)
513 while (testandset(lock));
516 static inline void spin_unlock(spinlock_t *lock)
521 static inline int spin_trylock(spinlock_t *lock)
523 return !testandset(lock);
526 static inline void spin_lock(spinlock_t *lock)
530 static inline void spin_unlock(spinlock_t *lock)
534 static inline int spin_trylock(spinlock_t *lock)
540 extern spinlock_t tb_lock;
542 extern int tb_invalidated_flag;
544 #if (defined(TARGET_I386) || defined(TARGET_PPC)) && \
545 !defined(CONFIG_USER_ONLY)
547 void tlb_fill(unsigned long addr, int is_write, int is_user,
550 #define ACCESS_TYPE 3
551 #define MEMSUFFIX _code
552 #define env cpu_single_env
555 #include "softmmu_header.h"
558 #include "softmmu_header.h"
561 #include "softmmu_header.h"
569 #if defined(CONFIG_USER_ONLY)
570 static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
575 /* NOTE: this function can trigger an exception */
576 /* NOTE2: the returned address is not exactly the physical address: it
577 is the offset relative to phys_ram_base */
578 /* XXX: i386 target specific */
579 static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
583 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
584 #if defined(TARGET_I386)
585 is_user = ((env->hflags & HF_CPL_MASK) == 3);
586 #elif defined (TARGET_PPC)
589 #error "Unimplemented !"
591 if (__builtin_expect(env->tlb_read[is_user][index].address !=
592 (addr & TARGET_PAGE_MASK), 0)) {
593 #if defined (TARGET_PPC)
594 env->access_type = ACCESS_CODE;
595 ldub_code((void *)addr);
596 env->access_type = ACCESS_INT;
598 ldub_code((void *)addr);
601 return addr + env->tlb_read[is_user][index].addend - (unsigned long)phys_ram_base;