softmmu_template.h

   1 /*
   2  *  Software MMU support
   3  *
   4  * Generate helpers used by TCG for qemu_ld/st ops and code load
   5  * functions.
   6  *
   7  * Included from target op helpers and exec.c.
   8  *
   9  *  Copyright (c) 2003 Fabrice Bellard
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  23  */
  24 #include "qemu/timer.h"
  25 #include "exec/address-spaces.h"
  26 #include "exec/memory.h"
  27
  28 #define DATA_SIZE (1 << SHIFT)
  29
  30 #if DATA_SIZE == 8
  31 #define SUFFIX q
  32 #define LSUFFIX q
  33 #define SDATA_TYPE  int64_t
  34 #define DATA_TYPE  uint64_t
  35 #elif DATA_SIZE == 4
  36 #define SUFFIX l
  37 #define LSUFFIX l
  38 #define SDATA_TYPE  int32_t
  39 #define DATA_TYPE  uint32_t
  40 #elif DATA_SIZE == 2
  41 #define SUFFIX w
  42 #define LSUFFIX uw
  43 #define SDATA_TYPE  int16_t
  44 #define DATA_TYPE  uint16_t
  45 #elif DATA_SIZE == 1
  46 #define SUFFIX b
  47 #define LSUFFIX ub
  48 #define SDATA_TYPE  int8_t
  49 #define DATA_TYPE  uint8_t
  50 #else
  51 #error unsupported data size
  52 #endif
  53
  54
  55 /* For the benefit of TCG generated code, we want to avoid the complication
  56    of ABI-specific return type promotion and always return a value extended
  57    to the register size of the host.  This is tcg_target_long, except in the
  58    case of a 32-bit host and 64-bit data, and for that we always have
  59    uint64_t.  Don't bother with this widened value for SOFTMMU_CODE_ACCESS.  */
  60 #if defined(SOFTMMU_CODE_ACCESS) || DATA_SIZE == 8
  61 # define WORD_TYPE  DATA_TYPE
  62 # define USUFFIX    SUFFIX
  63 #else
  64 # define WORD_TYPE  tcg_target_ulong
  65 # define USUFFIX    glue(u, SUFFIX)
  66 # define SSUFFIX    glue(s, SUFFIX)
  67 #endif
  68
  69 #ifdef SOFTMMU_CODE_ACCESS
  70 #define READ_ACCESS_TYPE MMU_INST_FETCH
  71 #define ADDR_READ addr_code
  72 #else
  73 #define READ_ACCESS_TYPE MMU_DATA_LOAD
  74 #define ADDR_READ addr_read
  75 #endif
  76
  77 #if DATA_SIZE == 8
  78 # define BSWAP(X)  bswap64(X)
  79 #elif DATA_SIZE == 4
  80 # define BSWAP(X)  bswap32(X)
  81 #elif DATA_SIZE == 2
  82 # define BSWAP(X)  bswap16(X)
  83 #else
  84 # define BSWAP(X)  (X)
  85 #endif
  86
  87 #ifdef TARGET_WORDS_BIGENDIAN
  88 # define TGT_BE(X)  (X)
  89 # define TGT_LE(X)  BSWAP(X)
  90 #else
  91 # define TGT_BE(X)  BSWAP(X)
  92 # define TGT_LE(X)  (X)
  93 #endif
  94
  95 #if DATA_SIZE == 1
  96 # define helper_le_ld_name  glue(glue(helper_ret_ld, USUFFIX), MMUSUFFIX)
  97 # define helper_be_ld_name  helper_le_ld_name
  98 # define helper_le_lds_name glue(glue(helper_ret_ld, SSUFFIX), MMUSUFFIX)
  99 # define helper_be_lds_name helper_le_lds_name
 100 # define helper_le_st_name  glue(glue(helper_ret_st, SUFFIX), MMUSUFFIX)
 101 # define helper_be_st_name  helper_le_st_name
 102 #else
 103 # define helper_le_ld_name  glue(glue(helper_le_ld, USUFFIX), MMUSUFFIX)
 104 # define helper_be_ld_name  glue(glue(helper_be_ld, USUFFIX), MMUSUFFIX)
 105 # define helper_le_lds_name glue(glue(helper_le_ld, SSUFFIX), MMUSUFFIX)
 106 # define helper_be_lds_name glue(glue(helper_be_ld, SSUFFIX), MMUSUFFIX)
 107 # define helper_le_st_name  glue(glue(helper_le_st, SUFFIX), MMUSUFFIX)
 108 # define helper_be_st_name  glue(glue(helper_be_st, SUFFIX), MMUSUFFIX)
 109 #endif
 110
 111 #ifdef TARGET_WORDS_BIGENDIAN
 112 # define helper_te_ld_name  helper_be_ld_name
 113 # define helper_te_st_name  helper_be_st_name
 114 #else
 115 # define helper_te_ld_name  helper_le_ld_name
 116 # define helper_te_st_name  helper_le_st_name
 117 #endif
 118
 119 /* macro to check the victim tlb */
 120 #define VICTIM_TLB_HIT(ty)                                                    \
 121 ({                                                                            \
 122     /* we are about to do a page table walk. our last hope is the             \
 123      * victim tlb. try to refill from the victim tlb before walking the       \
 124      * page table. */                                                         \
 125     int vidx;                                                                 \
 126     CPUIOTLBEntry tmpiotlb;                                                   \
 127     CPUTLBEntry tmptlb;                                                       \
 128     for (vidx = CPU_VTLB_SIZE-1; vidx >= 0; --vidx) {                         \
 129         if (env->tlb_v_table[mmu_idx][vidx].ty == (addr & TARGET_PAGE_MASK)) {\
 130             /* found entry in victim tlb, swap tlb and iotlb */               \
 131             tmptlb = env->tlb_table[mmu_idx][index];                          \
 132             env->tlb_table[mmu_idx][index] = env->tlb_v_table[mmu_idx][vidx]; \
 133             env->tlb_v_table[mmu_idx][vidx] = tmptlb;                         \
 134             tmpiotlb = env->iotlb[mmu_idx][index];                            \
 135             env->iotlb[mmu_idx][index] = env->iotlb_v[mmu_idx][vidx];         \
 136             env->iotlb_v[mmu_idx][vidx] = tmpiotlb;                           \
 137             break;                                                            \
 138         }                                                                     \
 139     }                                                                         \
 140     /* return true when there is a vtlb hit, i.e. vidx >=0 */                 \
 141     vidx >= 0;                                                                \
 142 })
 143
 144 #ifndef SOFTMMU_CODE_ACCESS
 145 static inline DATA_TYPE glue(io_read, SUFFIX)(CPUArchState *env,
 146                                               CPUIOTLBEntry *iotlbentry,
 147                                               target_ulong addr,
 148                                               uintptr_t retaddr)
 149 {
 150     uint64_t val;
 151     CPUState *cpu = ENV_GET_CPU(env);
 152     hwaddr physaddr = iotlbentry->addr;
 153     MemoryRegion *mr = iotlb_to_region(cpu, physaddr);
 154
 155     physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
 156     cpu->mem_io_pc = retaddr;
 157     if (mr != &io_mem_rom && mr != &io_mem_notdirty && !cpu->can_do_io) {
 158         cpu_io_recompile(cpu, retaddr);
 159     }
 160
 161     cpu->mem_io_vaddr = addr;
 162     memory_region_dispatch_read(mr, physaddr, &val, 1 << SHIFT,
 163                                 iotlbentry->attrs);
 164     return val;
 165 }
 166 #endif
 167
 168 #ifdef SOFTMMU_CODE_ACCESS
 169 static __attribute__((unused))
 170 #endif
 171 WORD_TYPE helper_le_ld_name(CPUArchState *env, target_ulong addr,
 172                             TCGMemOpIdx oi, uintptr_t retaddr)
 173 {
 174     unsigned mmu_idx = get_mmuidx(oi);
 175     int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 176     target_ulong tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ;
 177     uintptr_t haddr;
 178     DATA_TYPE res;
 179
 180     /* Adjust the given return address.  */
 181     retaddr -= GETPC_ADJ;
 182
 183     /* If the TLB entry is for a different page, reload and try again.  */
 184     if ((addr & TARGET_PAGE_MASK)
 185          != (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
 186         if ((addr & (DATA_SIZE - 1)) != 0
 187             && (get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 188             cpu_unaligned_access(ENV_GET_CPU(env), addr, READ_ACCESS_TYPE,
 189                                  mmu_idx, retaddr);
 190         }
 191         if (!VICTIM_TLB_HIT(ADDR_READ)) {
 192             tlb_fill(ENV_GET_CPU(env), addr, READ_ACCESS_TYPE,
 193                      mmu_idx, retaddr);
 194         }
 195         tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ;
 196     }
 197
 198     /* Handle an IO access.  */
 199     if (unlikely(tlb_addr & ~TARGET_PAGE_MASK)) {
 200         CPUIOTLBEntry *iotlbentry;
 201         if ((addr & (DATA_SIZE - 1)) != 0) {
 202             goto do_unaligned_access;
 203         }
 204         iotlbentry = &env->iotlb[mmu_idx][index];
 205
 206         /* ??? Note that the io helpers always read data in the target
 207            byte ordering.  We should push the LE/BE request down into io.  */
 208         res = glue(io_read, SUFFIX)(env, iotlbentry, addr, retaddr);
 209         res = TGT_LE(res);
 210         return res;
 211     }
 212
 213     /* Handle slow unaligned access (it spans two pages or IO).  */
 214     if (DATA_SIZE > 1
 215         && unlikely((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1
 216                     >= TARGET_PAGE_SIZE)) {
 217         target_ulong addr1, addr2;
 218         DATA_TYPE res1, res2;
 219         unsigned shift;
 220     do_unaligned_access:
 221         if ((get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 222             cpu_unaligned_access(ENV_GET_CPU(env), addr, READ_ACCESS_TYPE,
 223                                  mmu_idx, retaddr);
 224         }
 225         addr1 = addr & ~(DATA_SIZE - 1);
 226         addr2 = addr1 + DATA_SIZE;
 227         /* Note the adjustment at the beginning of the function.
 228            Undo that for the recursion.  */
 229         res1 = helper_le_ld_name(env, addr1, oi, retaddr + GETPC_ADJ);
 230         res2 = helper_le_ld_name(env, addr2, oi, retaddr + GETPC_ADJ);
 231         shift = (addr & (DATA_SIZE - 1)) * 8;
 232
 233         /* Little-endian combine.  */
 234         res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift));
 235         return res;
 236     }
 237
 238     /* Handle aligned access or unaligned access in the same page.  */
 239     if ((addr & (DATA_SIZE - 1)) != 0
 240         && (get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 241         cpu_unaligned_access(ENV_GET_CPU(env), addr, READ_ACCESS_TYPE,
 242                              mmu_idx, retaddr);
 243     }
 244
 245     haddr = addr + env->tlb_table[mmu_idx][index].addend;
 246 #if DATA_SIZE == 1
 247     res = glue(glue(ld, LSUFFIX), _p)((uint8_t *)haddr);
 248 #else
 249     res = glue(glue(ld, LSUFFIX), _le_p)((uint8_t *)haddr);
 250 #endif
 251     return res;
 252 }
 253
 254 #if DATA_SIZE > 1
 255 #ifdef SOFTMMU_CODE_ACCESS
 256 static __attribute__((unused))
 257 #endif
 258 WORD_TYPE helper_be_ld_name(CPUArchState *env, target_ulong addr,
 259                             TCGMemOpIdx oi, uintptr_t retaddr)
 260 {
 261     unsigned mmu_idx = get_mmuidx(oi);
 262     int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 263     target_ulong tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ;
 264     uintptr_t haddr;
 265     DATA_TYPE res;
 266
 267     /* Adjust the given return address.  */
 268     retaddr -= GETPC_ADJ;
 269
 270     /* If the TLB entry is for a different page, reload and try again.  */
 271     if ((addr & TARGET_PAGE_MASK)
 272          != (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
 273         if ((addr & (DATA_SIZE - 1)) != 0
 274             && (get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 275             cpu_unaligned_access(ENV_GET_CPU(env), addr, READ_ACCESS_TYPE,
 276                                  mmu_idx, retaddr);
 277         }
 278         if (!VICTIM_TLB_HIT(ADDR_READ)) {
 279             tlb_fill(ENV_GET_CPU(env), addr, READ_ACCESS_TYPE,
 280                      mmu_idx, retaddr);
 281         }
 282         tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ;
 283     }
 284
 285     /* Handle an IO access.  */
 286     if (unlikely(tlb_addr & ~TARGET_PAGE_MASK)) {
 287         CPUIOTLBEntry *iotlbentry;
 288         if ((addr & (DATA_SIZE - 1)) != 0) {
 289             goto do_unaligned_access;
 290         }
 291         iotlbentry = &env->iotlb[mmu_idx][index];
 292
 293         /* ??? Note that the io helpers always read data in the target
 294            byte ordering.  We should push the LE/BE request down into io.  */
 295         res = glue(io_read, SUFFIX)(env, iotlbentry, addr, retaddr);
 296         res = TGT_BE(res);
 297         return res;
 298     }
 299
 300     /* Handle slow unaligned access (it spans two pages or IO).  */
 301     if (DATA_SIZE > 1
 302         && unlikely((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1
 303                     >= TARGET_PAGE_SIZE)) {
 304         target_ulong addr1, addr2;
 305         DATA_TYPE res1, res2;
 306         unsigned shift;
 307     do_unaligned_access:
 308         if ((get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 309             cpu_unaligned_access(ENV_GET_CPU(env), addr, READ_ACCESS_TYPE,
 310                                  mmu_idx, retaddr);
 311         }
 312         addr1 = addr & ~(DATA_SIZE - 1);
 313         addr2 = addr1 + DATA_SIZE;
 314         /* Note the adjustment at the beginning of the function.
 315            Undo that for the recursion.  */
 316         res1 = helper_be_ld_name(env, addr1, oi, retaddr + GETPC_ADJ);
 317         res2 = helper_be_ld_name(env, addr2, oi, retaddr + GETPC_ADJ);
 318         shift = (addr & (DATA_SIZE - 1)) * 8;
 319
 320         /* Big-endian combine.  */
 321         res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift));
 322         return res;
 323     }
 324
 325     /* Handle aligned access or unaligned access in the same page.  */
 326     if ((addr & (DATA_SIZE - 1)) != 0
 327         && (get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 328         cpu_unaligned_access(ENV_GET_CPU(env), addr, READ_ACCESS_TYPE,
 329                              mmu_idx, retaddr);
 330     }
 331
 332     haddr = addr + env->tlb_table[mmu_idx][index].addend;
 333     res = glue(glue(ld, LSUFFIX), _be_p)((uint8_t *)haddr);
 334     return res;
 335 }
 336 #endif /* DATA_SIZE > 1 */
 337
 338 DATA_TYPE
 339 glue(glue(helper_ld, SUFFIX), MMUSUFFIX)(CPUArchState *env, target_ulong addr,
 340                                          int mmu_idx)
 341 {
 342     TCGMemOpIdx oi = make_memop_idx(SHIFT, mmu_idx);
 343     return helper_te_ld_name (env, addr, oi, GETRA());
 344 }
 345
 346 #ifndef SOFTMMU_CODE_ACCESS
 347
 348 /* Provide signed versions of the load routines as well.  We can of course
 349    avoid this for 64-bit data, or for 32-bit data on 32-bit host.  */
 350 #if DATA_SIZE * 8 < TCG_TARGET_REG_BITS
 351 WORD_TYPE helper_le_lds_name(CPUArchState *env, target_ulong addr,
 352                              TCGMemOpIdx oi, uintptr_t retaddr)
 353 {
 354     return (SDATA_TYPE)helper_le_ld_name(env, addr, oi, retaddr);
 355 }
 356
 357 # if DATA_SIZE > 1
 358 WORD_TYPE helper_be_lds_name(CPUArchState *env, target_ulong addr,
 359                              TCGMemOpIdx oi, uintptr_t retaddr)
 360 {
 361     return (SDATA_TYPE)helper_be_ld_name(env, addr, oi, retaddr);
 362 }
 363 # endif
 364 #endif
 365
 366 static inline void glue(io_write, SUFFIX)(CPUArchState *env,
 367                                           CPUIOTLBEntry *iotlbentry,
 368                                           DATA_TYPE val,
 369                                           target_ulong addr,
 370                                           uintptr_t retaddr)
 371 {
 372     CPUState *cpu = ENV_GET_CPU(env);
 373     hwaddr physaddr = iotlbentry->addr;
 374     MemoryRegion *mr = iotlb_to_region(cpu, physaddr);
 375
 376     physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
 377     if (mr != &io_mem_rom && mr != &io_mem_notdirty && !cpu->can_do_io) {
 378         cpu_io_recompile(cpu, retaddr);
 379     }
 380
 381     cpu->mem_io_vaddr = addr;
 382     cpu->mem_io_pc = retaddr;
 383     memory_region_dispatch_write(mr, physaddr, val, 1 << SHIFT,
 384                                  iotlbentry->attrs);
 385 }
 386
 387 void helper_le_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
 388                        TCGMemOpIdx oi, uintptr_t retaddr)
 389 {
 390     unsigned mmu_idx = get_mmuidx(oi);
 391     int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 392     target_ulong tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
 393     uintptr_t haddr;
 394
 395     /* Adjust the given return address.  */
 396     retaddr -= GETPC_ADJ;
 397
 398     /* If the TLB entry is for a different page, reload and try again.  */
 399     if ((addr & TARGET_PAGE_MASK)
 400         != (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
 401         if ((addr & (DATA_SIZE - 1)) != 0
 402             && (get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 403             cpu_unaligned_access(ENV_GET_CPU(env), addr, MMU_DATA_STORE,
 404                                  mmu_idx, retaddr);
 405         }
 406         if (!VICTIM_TLB_HIT(addr_write)) {
 407             tlb_fill(ENV_GET_CPU(env), addr, MMU_DATA_STORE, mmu_idx, retaddr);
 408         }
 409         tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
 410     }
 411
 412     /* Handle an IO access.  */
 413     if (unlikely(tlb_addr & ~TARGET_PAGE_MASK)) {
 414         CPUIOTLBEntry *iotlbentry;
 415         if ((addr & (DATA_SIZE - 1)) != 0) {
 416             goto do_unaligned_access;
 417         }
 418         iotlbentry = &env->iotlb[mmu_idx][index];
 419
 420         /* ??? Note that the io helpers always read data in the target
 421            byte ordering.  We should push the LE/BE request down into io.  */
 422         val = TGT_LE(val);
 423         glue(io_write, SUFFIX)(env, iotlbentry, val, addr, retaddr);
 424         return;
 425     }
 426
 427     /* Handle slow unaligned access (it spans two pages or IO).  */
 428     if (DATA_SIZE > 1
 429         && unlikely((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1
 430                      >= TARGET_PAGE_SIZE)) {
 431         int i;
 432     do_unaligned_access:
 433         if ((get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 434             cpu_unaligned_access(ENV_GET_CPU(env), addr, MMU_DATA_STORE,
 435                                  mmu_idx, retaddr);
 436         }
 437         /* XXX: not efficient, but simple */
 438         /* Note: relies on the fact that tlb_fill() does not remove the
 439          * previous page from the TLB cache.  */
 440         for (i = DATA_SIZE - 1; i >= 0; i--) {
 441             /* Little-endian extract.  */
 442             uint8_t val8 = val >> (i * 8);
 443             /* Note the adjustment at the beginning of the function.
 444                Undo that for the recursion.  */
 445             glue(helper_ret_stb, MMUSUFFIX)(env, addr + i, val8,
 446                                             oi, retaddr + GETPC_ADJ);
 447         }
 448         return;
 449     }
 450
 451     /* Handle aligned access or unaligned access in the same page.  */
 452     if ((addr & (DATA_SIZE - 1)) != 0
 453         && (get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 454         cpu_unaligned_access(ENV_GET_CPU(env), addr, MMU_DATA_STORE,
 455                              mmu_idx, retaddr);
 456     }
 457
 458     haddr = addr + env->tlb_table[mmu_idx][index].addend;
 459 #if DATA_SIZE == 1
 460     glue(glue(st, SUFFIX), _p)((uint8_t *)haddr, val);
 461 #else
 462     glue(glue(st, SUFFIX), _le_p)((uint8_t *)haddr, val);
 463 #endif
 464 }
 465
 466 #if DATA_SIZE > 1
 467 void helper_be_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
 468                        TCGMemOpIdx oi, uintptr_t retaddr)
 469 {
 470     unsigned mmu_idx = get_mmuidx(oi);
 471     int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 472     target_ulong tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
 473     uintptr_t haddr;
 474
 475     /* Adjust the given return address.  */
 476     retaddr -= GETPC_ADJ;
 477
 478     /* If the TLB entry is for a different page, reload and try again.  */
 479     if ((addr & TARGET_PAGE_MASK)
 480         != (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
 481         if ((addr & (DATA_SIZE - 1)) != 0
 482             && (get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 483             cpu_unaligned_access(ENV_GET_CPU(env), addr, MMU_DATA_STORE,
 484                                  mmu_idx, retaddr);
 485         }
 486         if (!VICTIM_TLB_HIT(addr_write)) {
 487             tlb_fill(ENV_GET_CPU(env), addr, MMU_DATA_STORE, mmu_idx, retaddr);
 488         }
 489         tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
 490     }
 491
 492     /* Handle an IO access.  */
 493     if (unlikely(tlb_addr & ~TARGET_PAGE_MASK)) {
 494         CPUIOTLBEntry *iotlbentry;
 495         if ((addr & (DATA_SIZE - 1)) != 0) {
 496             goto do_unaligned_access;
 497         }
 498         iotlbentry = &env->iotlb[mmu_idx][index];
 499
 500         /* ??? Note that the io helpers always read data in the target
 501            byte ordering.  We should push the LE/BE request down into io.  */
 502         val = TGT_BE(val);
 503         glue(io_write, SUFFIX)(env, iotlbentry, val, addr, retaddr);
 504         return;
 505     }
 506
 507     /* Handle slow unaligned access (it spans two pages or IO).  */
 508     if (DATA_SIZE > 1
 509         && unlikely((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1
 510                      >= TARGET_PAGE_SIZE)) {
 511         int i;
 512     do_unaligned_access:
 513         if ((get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 514             cpu_unaligned_access(ENV_GET_CPU(env), addr, MMU_DATA_STORE,
 515                                  mmu_idx, retaddr);
 516         }
 517         /* XXX: not efficient, but simple */
 518         /* Note: relies on the fact that tlb_fill() does not remove the
 519          * previous page from the TLB cache.  */
 520         for (i = DATA_SIZE - 1; i >= 0; i--) {
 521             /* Big-endian extract.  */
 522             uint8_t val8 = val >> (((DATA_SIZE - 1) * 8) - (i * 8));
 523             /* Note the adjustment at the beginning of the function.
 524                Undo that for the recursion.  */
 525             glue(helper_ret_stb, MMUSUFFIX)(env, addr + i, val8,
 526                                             oi, retaddr + GETPC_ADJ);
 527         }
 528         return;
 529     }
 530
 531     /* Handle aligned access or unaligned access in the same page.  */
 532     if ((addr & (DATA_SIZE - 1)) != 0
 533         && (get_memop(oi) & MO_AMASK) == MO_ALIGN) {
 534         cpu_unaligned_access(ENV_GET_CPU(env), addr, MMU_DATA_STORE,
 535                              mmu_idx, retaddr);
 536     }
 537
 538     haddr = addr + env->tlb_table[mmu_idx][index].addend;
 539     glue(glue(st, SUFFIX), _be_p)((uint8_t *)haddr, val);
 540 }
 541 #endif /* DATA_SIZE > 1 */
 542
 543 void
 544 glue(glue(helper_st, SUFFIX), MMUSUFFIX)(CPUArchState *env, target_ulong addr,
 545                                          DATA_TYPE val, int mmu_idx)
 546 {
 547     TCGMemOpIdx oi = make_memop_idx(SHIFT, mmu_idx);
 548     helper_te_st_name(env, addr, val, oi, GETRA());
 549 }
 550
 551 #if DATA_SIZE == 1
 552 /* Probe for whether the specified guest write access is permitted.
 553  * If it is not permitted then an exception will be taken in the same
 554  * way as if this were a real write access (and we will not return).
 555  * Otherwise the function will return, and there will be a valid
 556  * entry in the TLB for this access.
 557  */
 558 void probe_write(CPUArchState *env, target_ulong addr, int mmu_idx,
 559                  uintptr_t retaddr)
 560 {
 561     int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 562     target_ulong tlb_addr = env->tlb_table[mmu_idx][index].addr_write;
 563
 564     if ((addr & TARGET_PAGE_MASK)
 565         != (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
 566         /* TLB entry is for a different page */
 567         if (!VICTIM_TLB_HIT(addr_write)) {
 568             tlb_fill(ENV_GET_CPU(env), addr, MMU_DATA_STORE, mmu_idx, retaddr);
 569         }
 570     }
 571 }
 572 #endif
 573 #endif /* !defined(SOFTMMU_CODE_ACCESS) */
 574
 575 #undef READ_ACCESS_TYPE
 576 #undef SHIFT
 577 #undef DATA_TYPE
 578 #undef SUFFIX
 579 #undef LSUFFIX
 580 #undef DATA_SIZE
 581 #undef ADDR_READ
 582 #undef WORD_TYPE
 583 #undef SDATA_TYPE
 584 #undef USUFFIX
 585 #undef SSUFFIX
 586 #undef BSWAP
 587 #undef TGT_BE
 588 #undef TGT_LE
 589 #undef CPU_BE
 590 #undef CPU_LE
 591 #undef helper_le_ld_name
 592 #undef helper_be_ld_name
 593 #undef helper_le_lds_name
 594 #undef helper_be_lds_name
 595 #undef helper_le_st_name
 596 #undef helper_be_st_name
 597 #undef helper_te_ld_name
 598 #undef helper_te_st_name