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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifndef _EXEC_ALL_H_
  22 #define _EXEC_ALL_H_
  23 /* allow to see translation results - the slowdown should be negligible, so we leave it */
  24 #define DEBUG_DISAS
  25
  26 /* is_jmp field values */
  27 #define DISAS_NEXT    0 /* next instruction can be analyzed */
  28 #define DISAS_JUMP    1 /* only pc was modified dynamically */
  29 #define DISAS_UPDATE  2 /* cpu state was modified dynamically */
  30 #define DISAS_TB_JUMP 3 /* only pc was modified statically */
  31
  32 typedef struct TranslationBlock TranslationBlock;
  33
  34 /* XXX: make safe guess about sizes */
  35 #define MAX_OP_PER_INSTR 64
  36 /* A Call op needs up to 6 + 2N parameters (N = number of arguments).  */
  37 #define MAX_OPC_PARAM 10
  38 #define OPC_BUF_SIZE 512
  39 #define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
  40
  41 /* Maximum size a TCG op can expand to.  This is complicated because a
  42    single op may require several host instructions and regirster reloads.
  43    For now take a wild guess at 128 bytes, which should allow at least
  44    a couple of fixup instructions per argument.  */
  45 #define TCG_MAX_OP_SIZE 128
  46
  47 #define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * MAX_OPC_PARAM)
  48
  49 extern target_ulong gen_opc_pc[OPC_BUF_SIZE];
  50 extern target_ulong gen_opc_npc[OPC_BUF_SIZE];
  51 extern uint8_t gen_opc_cc_op[OPC_BUF_SIZE];
  52 extern uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
  53 extern uint16_t gen_opc_icount[OPC_BUF_SIZE];
  54 extern target_ulong gen_opc_jump_pc[2];
  55 extern uint32_t gen_opc_hflags[OPC_BUF_SIZE];
  56
  57 typedef void (GenOpFunc)(void);
  58 typedef void (GenOpFunc1)(long);
  59 typedef void (GenOpFunc2)(long, long);
  60 typedef void (GenOpFunc3)(long, long, long);
  61
  62 #include "qemu-log.h"
  63
  64 void gen_intermediate_code(CPUState *env, struct TranslationBlock *tb);
  65 void gen_intermediate_code_pc(CPUState *env, struct TranslationBlock *tb);
  66 void gen_pc_load(CPUState *env, struct TranslationBlock *tb,
  67                  unsigned long searched_pc, int pc_pos, void *puc);
  68
  69 unsigned long code_gen_max_block_size(void);
  70 void cpu_gen_init(void);
  71 int cpu_gen_code(CPUState *env, struct TranslationBlock *tb,
  72                  int *gen_code_size_ptr);
  73 int cpu_restore_state(struct TranslationBlock *tb,
  74                       CPUState *env, unsigned long searched_pc,
  75                       void *puc);
  76 int cpu_restore_state_copy(struct TranslationBlock *tb,
  77                            CPUState *env, unsigned long searched_pc,
  78                            void *puc);
  79 void cpu_resume_from_signal(CPUState *env1, void *puc);
  80 void cpu_io_recompile(CPUState *env, void *retaddr);
  81 TranslationBlock *tb_gen_code(CPUState *env,
  82                               target_ulong pc, target_ulong cs_base, int flags,
  83                               int cflags);
  84 void cpu_exec_init(CPUState *env);
  85 void cpu_loop_exit(void);
  86 int page_unprotect(target_ulong address, unsigned long pc, void *puc);
  87 void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t end,
  88                                    int is_cpu_write_access);
  89 void tb_invalidate_page_range(target_ulong start, target_ulong end);
  90 void tlb_flush_page(CPUState *env, target_ulong addr);
  91 void tlb_flush(CPUState *env, int flush_global);
  92 int tlb_set_page_exec(CPUState *env, target_ulong vaddr,
  93                       target_phys_addr_t paddr, int prot,
  94                       int mmu_idx, int is_softmmu);
  95 static inline int tlb_set_page(CPUState *env1, target_ulong vaddr,
  96                                target_phys_addr_t paddr, int prot,
  97                                int mmu_idx, int is_softmmu)
  98 {
  99     if (prot & PAGE_READ)
 100         prot |= PAGE_EXEC;
 101     return tlb_set_page_exec(env1, vaddr, paddr, prot, mmu_idx, is_softmmu);
 102 }
 103
 104 #define CODE_GEN_ALIGN           16 /* must be >= of the size of a icache line */
 105
 106 #define CODE_GEN_PHYS_HASH_BITS     15
 107 #define CODE_GEN_PHYS_HASH_SIZE     (1 << CODE_GEN_PHYS_HASH_BITS)
 108
 109 #define MIN_CODE_GEN_BUFFER_SIZE     (1024 * 1024)
 110
 111 /* estimated block size for TB allocation */
 112 /* XXX: use a per code average code fragment size and modulate it
 113    according to the host CPU */
 114 #if defined(CONFIG_SOFTMMU)
 115 #define CODE_GEN_AVG_BLOCK_SIZE 128
 116 #else
 117 #define CODE_GEN_AVG_BLOCK_SIZE 64
 118 #endif
 119
 120 #if defined(__powerpc__) || defined(__x86_64__) || defined(__arm__)
 121 #define USE_DIRECT_JUMP
 122 #endif
 123 #if defined(__i386__) && !defined(_WIN32)
 124 #define USE_DIRECT_JUMP
 125 #endif
 126
 127 struct TranslationBlock {
 128     target_ulong pc;   /* simulated PC corresponding to this block (EIP + CS base) */
 129     target_ulong cs_base; /* CS base for this block */
 130     uint64_t flags; /* flags defining in which context the code was generated */
 131     uint16_t size;      /* size of target code for this block (1 <=
 132                            size <= TARGET_PAGE_SIZE) */
 133     uint16_t cflags;    /* compile flags */
 134 #define CF_COUNT_MASK  0x7fff
 135 #define CF_LAST_IO     0x8000 /* Last insn may be an IO access.  */
 136
 137     uint8_t *tc_ptr;    /* pointer to the translated code */
 138     /* next matching tb for physical address. */
 139     struct TranslationBlock *phys_hash_next;
 140     /* first and second physical page containing code. The lower bit
 141        of the pointer tells the index in page_next[] */
 142     struct TranslationBlock *page_next[2];
 143     target_ulong page_addr[2];
 144
 145     /* the following data are used to directly call another TB from
 146        the code of this one. */
 147     uint16_t tb_next_offset[2]; /* offset of original jump target */
 148 #ifdef USE_DIRECT_JUMP
 149     uint16_t tb_jmp_offset[4]; /* offset of jump instruction */
 150 #else
 151     unsigned long tb_next[2]; /* address of jump generated code */
 152 #endif
 153     /* list of TBs jumping to this one. This is a circular list using
 154        the two least significant bits of the pointers to tell what is
 155        the next pointer: 0 = jmp_next[0], 1 = jmp_next[1], 2 =
 156        jmp_first */
 157     struct TranslationBlock *jmp_next[2];
 158     struct TranslationBlock *jmp_first;
 159     uint32_t icount;
 160 };
 161
 162 static inline unsigned int tb_jmp_cache_hash_page(target_ulong pc)
 163 {
 164     target_ulong tmp;
 165     tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));
 166     return (tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK;
 167 }
 168
 169 static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc)
 170 {
 171     target_ulong tmp;
 172     tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));
 173     return (((tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK)
 174             | (tmp & TB_JMP_ADDR_MASK));
 175 }
 176
 177 static inline unsigned int tb_phys_hash_func(unsigned long pc)
 178 {
 179     return pc & (CODE_GEN_PHYS_HASH_SIZE - 1);
 180 }
 181
 182 TranslationBlock *tb_alloc(target_ulong pc);
 183 void tb_free(TranslationBlock *tb);
 184 void tb_flush(CPUState *env);
 185 void tb_link_phys(TranslationBlock *tb,
 186                   target_ulong phys_pc, target_ulong phys_page2);
 187 void tb_phys_invalidate(TranslationBlock *tb, target_ulong page_addr);
 188
 189 extern TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
 190 extern uint8_t *code_gen_ptr;
 191 extern int code_gen_max_blocks;
 192
 193 #if defined(USE_DIRECT_JUMP)
 194
 195 #if defined(__powerpc__)
 196 extern void ppc_tb_set_jmp_target(unsigned long jmp_addr, unsigned long addr);
 197 #define tb_set_jmp_target1 ppc_tb_set_jmp_target
 198 #elif defined(__i386__) || defined(__x86_64__)
 199 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
 200 {
 201     /* patch the branch destination */
 202     *(uint32_t *)jmp_addr = addr - (jmp_addr + 4);
 203     /* no need to flush icache explicitly */
 204 }
 205 #elif defined(__arm__)
 206 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
 207 {
 208 #if QEMU_GNUC_PREREQ(4, 1)
 209     void __clear_cache(char *beg, char *end);
 210 #else
 211     register unsigned long _beg __asm ("a1");
 212     register unsigned long _end __asm ("a2");
 213     register unsigned long _flg __asm ("a3");
 214 #endif
 215
 216     /* we could use a ldr pc, [pc, #-4] kind of branch and avoid the flush */
 217     *(uint32_t *)jmp_addr |= ((addr - (jmp_addr + 8)) >> 2) & 0xffffff;
 218
 219 #if QEMU_GNUC_PREREQ(4, 1)
 220     __clear_cache((char *) jmp_addr, (char *) jmp_addr + 4);
 221 #else
 222     /* flush icache */
 223     _beg = jmp_addr;
 224     _end = jmp_addr + 4;
 225     _flg = 0;
 226     __asm __volatile__ ("swi 0x9f0002" : : "r" (_beg), "r" (_end), "r" (_flg));
 227 #endif
 228 }
 229 #endif
 230
 231 static inline void tb_set_jmp_target(TranslationBlock *tb,
 232                                      int n, unsigned long addr)
 233 {
 234     unsigned long offset;
 235
 236     offset = tb->tb_jmp_offset[n];
 237     tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
 238     offset = tb->tb_jmp_offset[n + 2];
 239     if (offset != 0xffff)
 240         tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
 241 }
 242
 243 #else
 244
 245 /* set the jump target */
 246 static inline void tb_set_jmp_target(TranslationBlock *tb,
 247                                      int n, unsigned long addr)
 248 {
 249     tb->tb_next[n] = addr;
 250 }
 251
 252 #endif
 253
 254 static inline void tb_add_jump(TranslationBlock *tb, int n,
 255                                TranslationBlock *tb_next)
 256 {
 257     /* NOTE: this test is only needed for thread safety */
 258     if (!tb->jmp_next[n]) {
 259         /* patch the native jump address */
 260         tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr);
 261
 262         /* add in TB jmp circular list */
 263         tb->jmp_next[n] = tb_next->jmp_first;
 264         tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n));
 265     }
 266 }
 267
 268 TranslationBlock *tb_find_pc(unsigned long pc_ptr);
 269
 270 extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
 271 extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
 272 extern void *io_mem_opaque[IO_MEM_NB_ENTRIES];
 273
 274 #include "qemu-lock.h"
 275
 276 extern spinlock_t tb_lock;
 277
 278 extern int tb_invalidated_flag;
 279
 280 #if !defined(CONFIG_USER_ONLY)
 281
 282 void tlb_fill(target_ulong addr, int is_write, int mmu_idx,
 283               void *retaddr);
 284
 285 #include "softmmu_defs.h"
 286
 287 #define ACCESS_TYPE (NB_MMU_MODES + 1)
 288 #define MEMSUFFIX _code
 289 #define env cpu_single_env
 290
 291 #define DATA_SIZE 1
 292 #include "softmmu_header.h"
 293
 294 #define DATA_SIZE 2
 295 #include "softmmu_header.h"
 296
 297 #define DATA_SIZE 4
 298 #include "softmmu_header.h"
 299
 300 #define DATA_SIZE 8
 301 #include "softmmu_header.h"
 302
 303 #undef ACCESS_TYPE
 304 #undef MEMSUFFIX
 305 #undef env
 306
 307 #endif
 308
 309 #if defined(CONFIG_USER_ONLY)
 310 static inline target_ulong get_phys_addr_code(CPUState *env1, target_ulong addr)
 311 {
 312     return addr;
 313 }
 314 #else
 315 /* NOTE: this function can trigger an exception */
 316 /* NOTE2: the returned address is not exactly the physical address: it
 317    is the offset relative to phys_ram_base */
 318 static inline target_ulong get_phys_addr_code(CPUState *env1, target_ulong addr)
 319 {
 320     int mmu_idx, page_index, pd;
 321
 322     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 323     mmu_idx = cpu_mmu_index(env1);
 324     if (unlikely(env1->tlb_table[mmu_idx][page_index].addr_code !=
 325                  (addr & TARGET_PAGE_MASK))) {
 326         ldub_code(addr);
 327     }
 328     pd = env1->tlb_table[mmu_idx][page_index].addr_code & ~TARGET_PAGE_MASK;
 329     if (pd > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) {
 330 #if defined(TARGET_SPARC) || defined(TARGET_MIPS)
 331         do_unassigned_access(addr, 0, 1, 0, 4);
 332 #else
 333         cpu_abort(env1, "Trying to execute code outside RAM or ROM at 0x" TARGET_FMT_lx "\n", addr);
 334 #endif
 335     }
 336     return addr + env1->tlb_table[mmu_idx][page_index].addend - (unsigned long)phys_ram_base;
 337 }
 338
 339 /* Deterministic execution requires that IO only be performed on the last
 340    instruction of a TB so that interrupts take effect immediately.  */
 341 static inline int can_do_io(CPUState *env)
 342 {
 343     if (!use_icount)
 344         return 1;
 345
 346     /* If not executing code then assume we are ok.  */
 347     if (!env->current_tb)
 348         return 1;
 349
 350     return env->can_do_io != 0;
 351 }
 352 #endif
 353
 354 #ifdef USE_KQEMU
 355 #define KQEMU_MODIFY_PAGE_MASK (0xff & ~(VGA_DIRTY_FLAG | CODE_DIRTY_FLAG))
 356
 357 #define MSR_QPI_COMMBASE 0xfabe0010
 358
 359 int kqemu_init(CPUState *env);
 360 int kqemu_cpu_exec(CPUState *env);
 361 void kqemu_flush_page(CPUState *env, target_ulong addr);
 362 void kqemu_flush(CPUState *env, int global);
 363 void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr);
 364 void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr);
 365 void kqemu_set_phys_mem(uint64_t start_addr, ram_addr_t size,
 366                         ram_addr_t phys_offset);
 367 void kqemu_cpu_interrupt(CPUState *env);
 368 void kqemu_record_dump(void);
 369
 370 extern uint32_t kqemu_comm_base;
 371
 372 static inline int kqemu_is_ok(CPUState *env)
 373 {
 374     return(env->kqemu_enabled &&
 375            (env->cr[0] & CR0_PE_MASK) &&
 376            !(env->hflags & HF_INHIBIT_IRQ_MASK) &&
 377            (env->eflags & IF_MASK) &&
 378            !(env->eflags & VM_MASK) &&
 379            (env->kqemu_enabled == 2 ||
 380             ((env->hflags & HF_CPL_MASK) == 3 &&
 381              (env->eflags & IOPL_MASK) != IOPL_MASK)));
 382 }
 383
 384 #endif
 385
 386 typedef void (CPUDebugExcpHandler)(CPUState *env);
 387
 388 CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler);
 389 #endif