1 /* 2 * internal execution defines for qemu 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * 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. 10 * 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. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef _EXEC_ALL_H_ 21 #define _EXEC_ALL_H_ 22 23 #include "qemu-common.h" 24 25 /* allow to see translation results - the slowdown should be negligible, so we leave it */ 26 #define DEBUG_DISAS 27 28 /* Page tracking code uses ram addresses in system mode, and virtual 29 addresses in userspace mode. Define tb_page_addr_t to be an appropriate 30 type. */ 31 #if defined(CONFIG_USER_ONLY) 32 typedef abi_ulong tb_page_addr_t; 33 #else 34 typedef ram_addr_t tb_page_addr_t; 35 #endif 36 37 /* is_jmp field values */ 38 #define DISAS_NEXT 0 /* next instruction can be analyzed */ 39 #define DISAS_JUMP 1 /* only pc was modified dynamically */ 40 #define DISAS_UPDATE 2 /* cpu state was modified dynamically */ 41 #define DISAS_TB_JUMP 3 /* only pc was modified statically */ 42 43 typedef struct TranslationBlock TranslationBlock; 44 45 /* XXX: make safe guess about sizes */ 46 #define MAX_OP_PER_INSTR 96 47 /* A Call op needs up to 6 + 2N parameters (N = number of arguments). */ 48 #define MAX_OPC_PARAM 10 49 #define OPC_BUF_SIZE 2048 50 #define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR) 51 52 /* Maximum size a TCG op can expand to. This is complicated because a 53 single op may require several host instructions and register reloads. 54 For now take a wild guess at 192 bytes, which should allow at least 55 a couple of fixup instructions per argument. */ 56 #define TCG_MAX_OP_SIZE 192 57 58 #define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * MAX_OPC_PARAM) 59 60 extern target_ulong gen_opc_pc[OPC_BUF_SIZE]; 61 extern target_ulong gen_opc_npc[OPC_BUF_SIZE]; 62 extern uint8_t gen_opc_cc_op[OPC_BUF_SIZE]; 63 extern uint8_t gen_opc_instr_start[OPC_BUF_SIZE]; 64 extern uint16_t gen_opc_icount[OPC_BUF_SIZE]; 65 extern target_ulong gen_opc_jump_pc[2]; 66 extern uint32_t gen_opc_hflags[OPC_BUF_SIZE]; 67 68 #include "qemu-log.h" 69 70 void gen_intermediate_code(CPUState *env, struct TranslationBlock *tb); 71 void gen_intermediate_code_pc(CPUState *env, struct TranslationBlock *tb); 72 void restore_state_to_opc(CPUState *env, struct TranslationBlock *tb, int pc_pos); 73 74 unsigned long code_gen_max_block_size(void); 75 void cpu_gen_init(void); 76 int cpu_gen_code(CPUState *env, struct TranslationBlock *tb, 77 int *gen_code_size_ptr); 78 int cpu_restore_state(struct TranslationBlock *tb, 79 CPUState *env, unsigned long searched_pc); 80 void cpu_resume_from_signal(CPUState *env1, void *puc); 81 void cpu_io_recompile(CPUState *env, void *retaddr); 82 TranslationBlock *tb_gen_code(CPUState *env, 83 target_ulong pc, target_ulong cs_base, int flags, 84 int cflags); 85 void cpu_exec_init(CPUState *env); 86 void QEMU_NORETURN cpu_loop_exit(void); 87 int page_unprotect(target_ulong address, unsigned long pc, void *puc); 88 void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t end, 89 int is_cpu_write_access); 90 void tb_invalidate_page_range(target_ulong start, target_ulong end); 91 void tlb_flush_page(CPUState *env, target_ulong addr); 92 void tlb_flush(CPUState *env, int flush_global); 93 int tlb_set_page_exec(CPUState *env, target_ulong vaddr, 94 target_phys_addr_t paddr, int prot, 95 int mmu_idx, int is_softmmu); 96 static inline int tlb_set_page(CPUState *env1, target_ulong vaddr, 97 target_phys_addr_t paddr, int prot, 98 int mmu_idx, int is_softmmu) 99 { 100 if (prot & PAGE_READ) 101 prot |= PAGE_EXEC; 102 return tlb_set_page_exec(env1, vaddr, paddr, prot, mmu_idx, is_softmmu); 103 } 104 105 #define CODE_GEN_ALIGN 16 /* must be >= of the size of a icache line */ 106 107 #define CODE_GEN_PHYS_HASH_BITS 15 108 #define CODE_GEN_PHYS_HASH_SIZE (1 << CODE_GEN_PHYS_HASH_BITS) 109 110 #define MIN_CODE_GEN_BUFFER_SIZE (1024 * 1024) 111 112 /* estimated block size for TB allocation */ 113 /* XXX: use a per code average code fragment size and modulate it 114 according to the host CPU */ 115 #if defined(CONFIG_SOFTMMU) 116 #define CODE_GEN_AVG_BLOCK_SIZE 128 117 #else 118 #define CODE_GEN_AVG_BLOCK_SIZE 64 119 #endif 120 121 #if defined(_ARCH_PPC) || defined(__x86_64__) || defined(__arm__) || defined(__i386__) 122 #define USE_DIRECT_JUMP 123 #endif 124 125 struct TranslationBlock { 126 target_ulong pc; /* simulated PC corresponding to this block (EIP + CS base) */ 127 target_ulong cs_base; /* CS base for this block */ 128 uint64_t flags; /* flags defining in which context the code was generated */ 129 uint16_t size; /* size of target code for this block (1 <= 130 size <= TARGET_PAGE_SIZE) */ 131 uint16_t cflags; /* compile flags */ 132 #define CF_COUNT_MASK 0x7fff 133 #define CF_LAST_IO 0x8000 /* Last insn may be an IO access. */ 134 135 uint8_t *tc_ptr; /* pointer to the translated code */ 136 /* next matching tb for physical address. */ 137 struct TranslationBlock *phys_hash_next; 138 /* first and second physical page containing code. The lower bit 139 of the pointer tells the index in page_next[] */ 140 struct TranslationBlock *page_next[2]; 141 target_ulong page_addr[2]; 142 143 /* the following data are used to directly call another TB from 144 the code of this one. */ 145 uint16_t tb_next_offset[2]; /* offset of original jump target */ 146 #ifdef USE_DIRECT_JUMP 147 uint16_t tb_jmp_offset[4]; /* offset of jump instruction */ 148 #else 149 unsigned long tb_next[2]; /* address of jump generated code */ 150 #endif 151 /* list of TBs jumping to this one. This is a circular list using 152 the two least significant bits of the pointers to tell what is 153 the next pointer: 0 = jmp_next[0], 1 = jmp_next[1], 2 = 154 jmp_first */ 155 struct TranslationBlock *jmp_next[2]; 156 struct TranslationBlock *jmp_first; 157 #ifdef CONFIG_TRACE 158 struct BBRec *bb_rec; 159 uint64_t prev_time; 160 #endif 161 162 #ifdef CONFIG_MEMCHECK 163 /* Maps PCs in this translation block to corresponding PCs in guest address 164 * space. The array is arranged in such way, that every even entry contains 165 * PC in the translation block, followed by an odd entry that contains 166 * guest PC corresponding to that PC in the translation block. This 167 * arrangement is set by tcg_gen_code_common that initializes this array 168 * when performing guest code translation. */ 169 uintptr_t* tpc2gpc; 170 /* Number of pairs (pc_tb, pc_guest) in tpc2gpc array. */ 171 unsigned int tpc2gpc_pairs; 172 #endif // CONFIG_MEMCHECK 173 174 uint32_t icount; 175 }; 176 177 static inline unsigned int tb_jmp_cache_hash_page(target_ulong pc) 178 { 179 target_ulong tmp; 180 tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)); 181 return (tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK; 182 } 183 184 static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc) 185 { 186 target_ulong tmp; 187 tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)); 188 return (((tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK) 189 | (tmp & TB_JMP_ADDR_MASK)); 190 } 191 192 static inline unsigned int tb_phys_hash_func(unsigned long pc) 193 { 194 return (pc >> 2) & (CODE_GEN_PHYS_HASH_SIZE - 1); 195 } 196 197 #ifdef CONFIG_MEMCHECK 198 /* Gets translated PC for a given (translated PC, guest PC) pair. 199 * Return: 200 * Translated PC, or NULL if pair index was too large. 201 */ 202 static inline target_ulong 203 tb_get_tb_pc(const TranslationBlock* tb, unsigned int pair) 204 { 205 return (tb->tpc2gpc != NULL && pair < tb->tpc2gpc_pairs) ? 206 tb->tpc2gpc[pair * 2] : 0; 207 } 208 209 /* Gets guest PC for a given (translated PC, guest PC) pair. 210 * Return: 211 * Guest PC, or NULL if pair index was too large. 212 */ 213 static inline target_ulong 214 tb_get_guest_pc(const TranslationBlock* tb, unsigned int pair) 215 { 216 return (tb->tpc2gpc != NULL && pair < tb->tpc2gpc_pairs) ? 217 tb->tpc2gpc[pair * 2 + 1] : 0; 218 } 219 220 /* Gets guest PC for a given translated PC. 221 * Return: 222 * Guest PC for a given translated PC, or NULL if there was no pair, matching 223 * translated PC in tb's tpc2gpc array. 224 */ 225 static inline target_ulong 226 tb_search_guest_pc_from_tb_pc(const TranslationBlock* tb, target_ulong tb_pc) 227 { 228 if (tb->tpc2gpc != NULL && tb->tpc2gpc_pairs != 0) { 229 unsigned int m_min = 0; 230 unsigned int m_max = (tb->tpc2gpc_pairs - 1) << 1; 231 /* Make sure that tb_pc is within TB array. */ 232 if (tb_pc < tb->tpc2gpc[0]) { 233 return 0; 234 } 235 while (m_min <= m_max) { 236 const unsigned int m = ((m_min + m_max) >> 1) & ~1; 237 if (tb_pc < tb->tpc2gpc[m]) { 238 m_max = m - 2; 239 } else if (m == m_max || tb_pc < tb->tpc2gpc[m + 2]) { 240 return tb->tpc2gpc[m + 1]; 241 } else { 242 m_min = m + 2; 243 } 244 } 245 return tb->tpc2gpc[m_max + 1]; 246 } 247 return 0; 248 } 249 #endif // CONFIG_MEMCHECK 250 251 TranslationBlock *tb_alloc(target_ulong pc); 252 void tb_free(TranslationBlock *tb); 253 void tb_flush(CPUState *env); 254 void tb_link_phys(TranslationBlock *tb, 255 target_ulong phys_pc, target_ulong phys_page2); 256 void tb_phys_invalidate(TranslationBlock *tb, target_ulong page_addr); 257 258 extern TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE]; 259 extern uint8_t *code_gen_ptr; 260 extern int code_gen_max_blocks; 261 262 #if defined(USE_DIRECT_JUMP) 263 264 #if defined(_ARCH_PPC) 265 extern void ppc_tb_set_jmp_target(unsigned long jmp_addr, unsigned long addr); 266 #define tb_set_jmp_target1 ppc_tb_set_jmp_target 267 #elif defined(__i386__) || defined(__x86_64__) 268 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr) 269 { 270 /* patch the branch destination */ 271 *(uint32_t *)jmp_addr = addr - (jmp_addr + 4); 272 /* no need to flush icache explicitly */ 273 } 274 #elif defined(__arm__) 275 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr) 276 { 277 #if QEMU_GNUC_PREREQ(4, 1) 278 void __clear_cache(char *beg, char *end); 279 #else 280 register unsigned long _beg __asm ("a1"); 281 register unsigned long _end __asm ("a2"); 282 register unsigned long _flg __asm ("a3"); 283 #endif 284 285 /* we could use a ldr pc, [pc, #-4] kind of branch and avoid the flush */ 286 *(uint32_t *)jmp_addr = 287 (*(uint32_t *)jmp_addr & ~0xffffff) 288 | (((addr - (jmp_addr + 8)) >> 2) & 0xffffff); 289 290 #if QEMU_GNUC_PREREQ(4, 1) 291 __clear_cache((char *) jmp_addr, (char *) jmp_addr + 4); 292 #else 293 /* flush icache */ 294 _beg = jmp_addr; 295 _end = jmp_addr + 4; 296 _flg = 0; 297 __asm __volatile__ ("swi 0x9f0002" : : "r" (_beg), "r" (_end), "r" (_flg)); 298 #endif 299 } 300 #endif 301 302 static inline void tb_set_jmp_target(TranslationBlock *tb, 303 int n, unsigned long addr) 304 { 305 unsigned long offset; 306 307 offset = tb->tb_jmp_offset[n]; 308 tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr); 309 offset = tb->tb_jmp_offset[n + 2]; 310 if (offset != 0xffff) 311 tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr); 312 } 313 314 #else 315 316 /* set the jump target */ 317 static inline void tb_set_jmp_target(TranslationBlock *tb, 318 int n, unsigned long addr) 319 { 320 tb->tb_next[n] = addr; 321 } 322 323 #endif 324 325 static inline void tb_add_jump(TranslationBlock *tb, int n, 326 TranslationBlock *tb_next) 327 { 328 /* NOTE: this test is only needed for thread safety */ 329 if (!tb->jmp_next[n]) { 330 /* patch the native jump address */ 331 tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr); 332 333 /* add in TB jmp circular list */ 334 tb->jmp_next[n] = tb_next->jmp_first; 335 tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n)); 336 } 337 } 338 339 TranslationBlock *tb_find_pc(unsigned long pc_ptr); 340 341 extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4]; 342 extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4]; 343 extern void *io_mem_opaque[IO_MEM_NB_ENTRIES]; 344 345 #include "qemu-lock.h" 346 347 extern spinlock_t tb_lock; 348 349 extern int tb_invalidated_flag; 350 351 #if !defined(CONFIG_USER_ONLY) 352 353 void tlb_fill(target_ulong addr, int is_write, int mmu_idx, 354 void *retaddr); 355 356 #include "softmmu_defs.h" 357 358 #define ACCESS_TYPE (NB_MMU_MODES + 1) 359 #define MEMSUFFIX _code 360 #define env cpu_single_env 361 362 #define DATA_SIZE 1 363 #include "softmmu_header.h" 364 365 #define DATA_SIZE 2 366 #include "softmmu_header.h" 367 368 #define DATA_SIZE 4 369 #include "softmmu_header.h" 370 371 #define DATA_SIZE 8 372 #include "softmmu_header.h" 373 374 #undef ACCESS_TYPE 375 #undef MEMSUFFIX 376 #undef env 377 378 #endif 379 380 #if defined(CONFIG_USER_ONLY) 381 static inline target_ulong get_phys_addr_code(CPUState *env1, target_ulong addr) 382 { 383 return addr; 384 } 385 #else 386 /* NOTE: this function can trigger an exception */ 387 /* NOTE2: the returned address is not exactly the physical address: it 388 is the offset relative to phys_ram_base */ 389 static inline target_ulong get_phys_addr_code(CPUState *env1, target_ulong addr) 390 { 391 int mmu_idx, page_index, pd; 392 void *p; 393 394 page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); 395 mmu_idx = cpu_mmu_index(env1); 396 if (unlikely(env1->tlb_table[mmu_idx][page_index].addr_code != 397 (addr & TARGET_PAGE_MASK))) { 398 ldub_code(addr); 399 } 400 pd = env1->tlb_table[mmu_idx][page_index].addr_code & ~TARGET_PAGE_MASK; 401 if (pd > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) { 402 #if defined(TARGET_SPARC) || defined(TARGET_MIPS) 403 do_unassigned_access(addr, 0, 1, 0, 4); 404 #else 405 cpu_abort(env1, "Trying to execute code outside RAM or ROM at 0x" TARGET_FMT_lx "\n", addr); 406 #endif 407 } 408 p = (void *)(unsigned long)addr 409 + env1->tlb_table[mmu_idx][page_index].addend; 410 return qemu_ram_addr_from_host_nofail(p); 411 } 412 #endif 413 414 typedef void (CPUDebugExcpHandler)(CPUState *env); 415 416 CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler); 417 418 /* vl.c */ 419 extern int singlestep; 420 421 #endif 422
