exec-all.h

   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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA  02110-1301 USA
  19  */
  20
  21 #ifndef _EXEC_ALL_H_
  22 #define _EXEC_ALL_H_
  23
  24 #include "qemu-common.h"
  25
  26 /* allow to see translation results - the slowdown should be negligible, so we leave it */
  27 #define DEBUG_DISAS
  28
  29 /* is_jmp field values */
  30 #define DISAS_NEXT    0 /* next instruction can be analyzed */
  31 #define DISAS_JUMP    1 /* only pc was modified dynamically */
  32 #define DISAS_UPDATE  2 /* cpu state was modified dynamically */
  33 #define DISAS_TB_JUMP 3 /* only pc was modified statically */
  34
  35 typedef struct TranslationBlock TranslationBlock;
  36
  37 /* XXX: make safe guess about sizes */
  38 #define MAX_OP_PER_INSTR 64
  39 /* A Call op needs up to 6 + 2N parameters (N = number of arguments).  */
  40 #define MAX_OPC_PARAM 10
  41 #define OPC_BUF_SIZE 512
  42 #define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
  43
  44 /* Maximum size a TCG op can expand to.  This is complicated because a
  45    single op may require several host instructions and regirster reloads.
  46    For now take a wild guess at 128 bytes, which should allow at least
  47    a couple of fixup instructions per argument.  */
  48 #define TCG_MAX_OP_SIZE 128
  49
  50 #define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * MAX_OPC_PARAM)
  51
  52 extern target_ulong gen_opc_pc[OPC_BUF_SIZE];
  53 extern target_ulong gen_opc_npc[OPC_BUF_SIZE];
  54 extern uint8_t gen_opc_cc_op[OPC_BUF_SIZE];
  55 extern uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
  56 extern uint16_t gen_opc_icount[OPC_BUF_SIZE];
  57 extern target_ulong gen_opc_jump_pc[2];
  58 extern uint32_t gen_opc_hflags[OPC_BUF_SIZE];
  59
  60 typedef void (GenOpFunc)(void);
  61 typedef void (GenOpFunc1)(long);
  62 typedef void (GenOpFunc2)(long, long);
  63 typedef void (GenOpFunc3)(long, long, long);
  64
  65 #include "qemu-log.h"
  66
  67 void gen_intermediate_code(CPUState *env, struct TranslationBlock *tb);
  68 void gen_intermediate_code_pc(CPUState *env, struct TranslationBlock *tb);
  69 void gen_pc_load(CPUState *env, struct TranslationBlock *tb,
  70                  unsigned long searched_pc, int pc_pos, void *puc);
  71
  72 unsigned long code_gen_max_block_size(void);
  73 void cpu_gen_init(void);
  74 int cpu_gen_code(CPUState *env, struct TranslationBlock *tb,
  75                  int *gen_code_size_ptr);
  76 int cpu_restore_state(struct TranslationBlock *tb,
  77                       CPUState *env, unsigned long searched_pc,
  78                       void *puc);
  79 int cpu_restore_state_copy(struct TranslationBlock *tb,
  80                            CPUState *env, unsigned long searched_pc,
  81                            void *puc);
  82 void cpu_resume_from_signal(CPUState *env1, void *puc);
  83 void cpu_io_recompile(CPUState *env, void *retaddr);
  84 TranslationBlock *tb_gen_code(CPUState *env,
  85                               target_ulong pc, target_ulong cs_base, int flags,
  86                               int cflags);
  87 void cpu_exec_init(CPUState *env);
  88 void noreturn cpu_loop_exit(void);
  89 int page_unprotect(target_ulong address, unsigned long pc, void *puc);
  90 void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t end,
  91                                    int is_cpu_write_access);
  92 void tb_invalidate_page_range(target_ulong start, target_ulong end);
  93 void tlb_flush_page(CPUState *env, target_ulong addr);
  94 void tlb_flush(CPUState *env, int flush_global);
  95 int tlb_set_page_exec(CPUState *env, target_ulong vaddr,
  96                       target_phys_addr_t paddr, int prot,
  97                       int mmu_idx, int is_softmmu);
  98 static inline int tlb_set_page(CPUState *env1, target_ulong vaddr,
  99                                target_phys_addr_t paddr, int prot,
 100                                int mmu_idx, int is_softmmu)
 101 {
 102     if (prot & PAGE_READ)
 103         prot |= PAGE_EXEC;
 104     return tlb_set_page_exec(env1, vaddr, paddr, prot, mmu_idx, is_softmmu);
 105 }
 106
 107 #define CODE_GEN_ALIGN           16 /* must be >= of the size of a icache line */
 108
 109 #define CODE_GEN_PHYS_HASH_BITS     15
 110 #define CODE_GEN_PHYS_HASH_SIZE     (1 << CODE_GEN_PHYS_HASH_BITS)
 111
 112 #define MIN_CODE_GEN_BUFFER_SIZE     (1024 * 1024)
 113
 114 /* estimated block size for TB allocation */
 115 /* XXX: use a per code average code fragment size and modulate it
 116    according to the host CPU */
 117 #if defined(CONFIG_SOFTMMU)
 118 #define CODE_GEN_AVG_BLOCK_SIZE 128
 119 #else
 120 #define CODE_GEN_AVG_BLOCK_SIZE 64
 121 #endif
 122
 123 #if defined(_ARCH_PPC) || defined(__x86_64__) || defined(__arm__)
 124 #define USE_DIRECT_JUMP
 125 #endif
 126 #if defined(__i386__) && !defined(_WIN32)
 127 #define USE_DIRECT_JUMP
 128 #endif
 129
 130 struct TranslationBlock {
 131     target_ulong pc;   /* simulated PC corresponding to this block (EIP + CS base) */
 132     target_ulong cs_base; /* CS base for this block */
 133     uint64_t flags; /* flags defining in which context the code was generated */
 134     uint16_t size;      /* size of target code for this block (1 <=
 135                            size <= TARGET_PAGE_SIZE) */
 136     uint16_t cflags;    /* compile flags */
 137 #define CF_COUNT_MASK  0x7fff
 138 #define CF_LAST_IO     0x8000 /* Last insn may be an IO access.  */
 139
 140     uint8_t *tc_ptr;    /* pointer to the translated code */
 141     /* next matching tb for physical address. */
 142     struct TranslationBlock *phys_hash_next;
 143     /* first and second physical page containing code. The lower bit
 144        of the pointer tells the index in page_next[] */
 145     struct TranslationBlock *page_next[2];
 146     target_ulong page_addr[2];
 147
 148     /* the following data are used to directly call another TB from
 149        the code of this one. */
 150     uint16_t tb_next_offset[2]; /* offset of original jump target */
 151 #ifdef USE_DIRECT_JUMP
 152     uint16_t tb_jmp_offset[4]; /* offset of jump instruction */
 153 #else
 154     unsigned long tb_next[2]; /* address of jump generated code */
 155 #endif
 156     /* list of TBs jumping to this one. This is a circular list using
 157        the two least significant bits of the pointers to tell what is
 158        the next pointer: 0 = jmp_next[0], 1 = jmp_next[1], 2 =
 159        jmp_first */
 160     struct TranslationBlock *jmp_next[2];
 161     struct TranslationBlock *jmp_first;
 162     uint32_t icount;
 163 };
 164
 165 static inline unsigned int tb_jmp_cache_hash_page(target_ulong pc)
 166 {
 167     target_ulong tmp;
 168     tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));
 169     return (tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK;
 170 }
 171
 172 static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc)
 173 {
 174     target_ulong tmp;
 175     tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));
 176     return (((tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK)
 177             | (tmp & TB_JMP_ADDR_MASK));
 178 }
 179
 180 static inline unsigned int tb_phys_hash_func(unsigned long pc)
 181 {
 182     return pc & (CODE_GEN_PHYS_HASH_SIZE - 1);
 183 }
 184
 185 TranslationBlock *tb_alloc(target_ulong pc);
 186 void tb_free(TranslationBlock *tb);
 187 void tb_flush(CPUState *env);
 188 void tb_link_phys(TranslationBlock *tb,
 189                   target_ulong phys_pc, target_ulong phys_page2);
 190 void tb_phys_invalidate(TranslationBlock *tb, target_ulong page_addr);
 191
 192 extern TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
 193 extern uint8_t *code_gen_ptr;
 194 extern int code_gen_max_blocks;
 195
 196 #if defined(USE_DIRECT_JUMP)
 197
 198 #if defined(_ARCH_PPC)
 199 extern void ppc_tb_set_jmp_target(unsigned long jmp_addr, unsigned long addr);
 200 #define tb_set_jmp_target1 ppc_tb_set_jmp_target
 201 #elif defined(__i386__) || defined(__x86_64__)
 202 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
 203 {
 204     /* patch the branch destination */
 205     *(uint32_t *)jmp_addr = addr - (jmp_addr + 4);
 206     /* no need to flush icache explicitly */
 207 }
 208 #elif defined(__arm__)
 209 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
 210 {
 211 #if QEMU_GNUC_PREREQ(4, 1)
 212     void __clear_cache(char *beg, char *end);
 213 #else
 214     register unsigned long _beg __asm ("a1");
 215     register unsigned long _end __asm ("a2");
 216     register unsigned long _flg __asm ("a3");
 217 #endif
 218
 219     /* we could use a ldr pc, [pc, #-4] kind of branch and avoid the flush */
 220     *(uint32_t *)jmp_addr |= ((addr - (jmp_addr + 8)) >> 2) & 0xffffff;
 221
 222 #if QEMU_GNUC_PREREQ(4, 1)
 223     __clear_cache((char *) jmp_addr, (char *) jmp_addr + 4);
 224 #else
 225     /* flush icache */
 226     _beg = jmp_addr;
 227     _end = jmp_addr + 4;
 228     _flg = 0;
 229     __asm __volatile__ ("swi 0x9f0002" : : "r" (_beg), "r" (_end), "r" (_flg));
 230 #endif
 231 }
 232 #endif
 233
 234 static inline void tb_set_jmp_target(TranslationBlock *tb,
 235                                      int n, unsigned long addr)
 236 {
 237     unsigned long offset;
 238
 239     offset = tb->tb_jmp_offset[n];
 240     tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
 241     offset = tb->tb_jmp_offset[n + 2];
 242     if (offset != 0xffff)
 243         tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
 244 }
 245
 246 #else
 247
 248 /* set the jump target */
 249 static inline void tb_set_jmp_target(TranslationBlock *tb,
 250                                      int n, unsigned long addr)
 251 {
 252     tb->tb_next[n] = addr;
 253 }
 254
 255 #endif
 256
 257 static inline void tb_add_jump(TranslationBlock *tb, int n,
 258                                TranslationBlock *tb_next)
 259 {
 260     /* NOTE: this test is only needed for thread safety */
 261     if (!tb->jmp_next[n]) {
 262         /* patch the native jump address */
 263         tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr);
 264
 265         /* add in TB jmp circular list */
 266         tb->jmp_next[n] = tb_next->jmp_first;
 267         tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n));
 268     }
 269 }
 270
 271 TranslationBlock *tb_find_pc(unsigned long pc_ptr);
 272
 273 extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
 274 extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
 275 extern void *io_mem_opaque[IO_MEM_NB_ENTRIES];
 276
 277 #include "qemu-lock.h"
 278
 279 extern spinlock_t tb_lock;
 280
 281 extern int tb_invalidated_flag;
 282
 283 #if !defined(CONFIG_USER_ONLY)
 284
 285 void tlb_fill(target_ulong addr, int is_write, int mmu_idx,
 286               void *retaddr);
 287
 288 #include "softmmu_defs.h"
 289
 290 #define ACCESS_TYPE (NB_MMU_MODES + 1)
 291 #define MEMSUFFIX _code
 292 #define env cpu_single_env
 293
 294 #define DATA_SIZE 1
 295 #include "softmmu_header.h"
 296
 297 #define DATA_SIZE 2
 298 #include "softmmu_header.h"
 299
 300 #define DATA_SIZE 4
 301 #include "softmmu_header.h"
 302
 303 #define DATA_SIZE 8
 304 #include "softmmu_header.h"
 305
 306 #undef ACCESS_TYPE
 307 #undef MEMSUFFIX
 308 #undef env
 309
 310 #endif
 311
 312 #if defined(CONFIG_USER_ONLY)
 313 static inline target_ulong get_phys_addr_code(CPUState *env1, target_ulong addr)
 314 {
 315     return addr;
 316 }
 317 #else
 318 /* NOTE: this function can trigger an exception */
 319 /* NOTE2: the returned address is not exactly the physical address: it
 320    is the offset relative to phys_ram_base */
 321 static inline target_ulong get_phys_addr_code(CPUState *env1, target_ulong addr)
 322 {
 323     int mmu_idx, page_index, pd;
 324
 325     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 326     mmu_idx = cpu_mmu_index(env1);
 327     if (unlikely(env1->tlb_table[mmu_idx][page_index].addr_code !=
 328                  (addr & TARGET_PAGE_MASK))) {
 329         ldub_code(addr);
 330     }
 331     pd = env1->tlb_table[mmu_idx][page_index].addr_code & ~TARGET_PAGE_MASK;
 332     if (pd > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) {
 333 #if defined(TARGET_SPARC) || defined(TARGET_MIPS)
 334         do_unassigned_access(addr, 0, 1, 0, 4);
 335 #else
 336         cpu_abort(env1, "Trying to execute code outside RAM or ROM at 0x" TARGET_FMT_lx "\n", addr);
 337 #endif
 338     }
 339     return addr + env1->tlb_table[mmu_idx][page_index].addend - (unsigned long)phys_ram_base;
 340 }
 341
 342 /* Deterministic execution requires that IO only be performed on the last
 343    instruction of a TB so that interrupts take effect immediately.  */
 344 static inline int can_do_io(CPUState *env)
 345 {
 346     if (!use_icount)
 347         return 1;
 348
 349     /* If not executing code then assume we are ok.  */
 350     if (!env->current_tb)
 351         return 1;
 352
 353     return env->can_do_io != 0;
 354 }
 355 #endif
 356
 357 #ifdef USE_KQEMU
 358 #define KQEMU_MODIFY_PAGE_MASK (0xff & ~(VGA_DIRTY_FLAG | CODE_DIRTY_FLAG))
 359
 360 #define MSR_QPI_COMMBASE 0xfabe0010
 361
 362 int kqemu_init(CPUState *env);
 363 int kqemu_cpu_exec(CPUState *env);
 364 void kqemu_flush_page(CPUState *env, target_ulong addr);
 365 void kqemu_flush(CPUState *env, int global);
 366 void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr);
 367 void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr);
 368 void kqemu_set_phys_mem(uint64_t start_addr, ram_addr_t size,
 369                         ram_addr_t phys_offset);
 370 void kqemu_cpu_interrupt(CPUState *env);
 371 void kqemu_record_dump(void);
 372
 373 extern uint32_t kqemu_comm_base;
 374
 375 static inline int kqemu_is_ok(CPUState *env)
 376 {
 377     return(env->kqemu_enabled &&
 378            (env->cr[0] & CR0_PE_MASK) &&
 379            !(env->hflags & HF_INHIBIT_IRQ_MASK) &&
 380            (env->eflags & IF_MASK) &&
 381            !(env->eflags & VM_MASK) &&
 382            (env->kqemu_enabled == 2 ||
 383             ((env->hflags & HF_CPL_MASK) == 3 &&
 384              (env->eflags & IOPL_MASK) != IOPL_MASK)));
 385 }
 386
 387 #endif
 388
 389 typedef void (CPUDebugExcpHandler)(CPUState *env);
 390
 391 CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler);
 392 #endif