include/exec/cpu_ldst.h

   1 /*
   2  *  Software MMU support
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 /*
  20  * Generate inline load/store functions for all MMU modes (typically
  21  * at least _user and _kernel) as well as _data versions, for all data
  22  * sizes.
  23  *
  24  * Used by target op helpers.
  25  *
  26  * The syntax for the accessors is:
  27  *
  28  * load: cpu_ld{sign}{size}_{mmusuffix}(env, ptr)
  29  *
  30  * store: cpu_st{sign}{size}_{mmusuffix}(env, ptr, val)
  31  *
  32  * sign is:
  33  * (empty): for 32 and 64 bit sizes
  34  *   u    : unsigned
  35  *   s    : signed
  36  *
  37  * size is:
  38  *   b: 8 bits
  39  *   w: 16 bits
  40  *   l: 32 bits
  41  *   q: 64 bits
  42  *
  43  * mmusuffix is one of the generic suffixes "data" or "code", or
  44  * (for softmmu configs)  a target-specific MMU mode suffix as defined
  45  * in target cpu.h.
  46  */
  47 #ifndef CPU_LDST_H
  48 #define CPU_LDST_H
  49
  50 #if defined(CONFIG_USER_ONLY)
  51 /* All direct uses of g2h and h2g need to go away for usermode softmmu.  */
  52 #define g2h(x) ((void *)((unsigned long)(target_ulong)(x) + guest_base))
  53
  54 #if HOST_LONG_BITS <= TARGET_VIRT_ADDR_SPACE_BITS
  55 #define h2g_valid(x) 1
  56 #else
  57 #define h2g_valid(x) ({ \
  58     unsigned long __guest = (unsigned long)(x) - guest_base; \
  59     (__guest < (1ul << TARGET_VIRT_ADDR_SPACE_BITS)) && \
  60     (!reserved_va || (__guest < reserved_va)); \
  61 })
  62 #endif
  63
  64 #define h2g_nocheck(x) ({ \
  65     unsigned long __ret = (unsigned long)(x) - guest_base; \
  66     (abi_ulong)__ret; \
  67 })
  68
  69 #define h2g(x) ({ \
  70     /* Check if given address fits target address space */ \
  71     assert(h2g_valid(x)); \
  72     h2g_nocheck(x); \
  73 })
  74
  75 #endif
  76
  77 #if defined(CONFIG_USER_ONLY)
  78
  79 extern __thread uintptr_t helper_retaddr;
  80
  81 /* In user-only mode we provide only the _code and _data accessors. */
  82
  83 #define MEMSUFFIX _data
  84 #define DATA_SIZE 1
  85 #include "exec/cpu_ldst_useronly_template.h"
  86
  87 #define DATA_SIZE 2
  88 #include "exec/cpu_ldst_useronly_template.h"
  89
  90 #define DATA_SIZE 4
  91 #include "exec/cpu_ldst_useronly_template.h"
  92
  93 #define DATA_SIZE 8
  94 #include "exec/cpu_ldst_useronly_template.h"
  95 #undef MEMSUFFIX
  96
  97 #define MEMSUFFIX _code
  98 #define CODE_ACCESS
  99 #define DATA_SIZE 1
 100 #include "exec/cpu_ldst_useronly_template.h"
 101
 102 #define DATA_SIZE 2
 103 #include "exec/cpu_ldst_useronly_template.h"
 104
 105 #define DATA_SIZE 4
 106 #include "exec/cpu_ldst_useronly_template.h"
 107
 108 #define DATA_SIZE 8
 109 #include "exec/cpu_ldst_useronly_template.h"
 110 #undef MEMSUFFIX
 111 #undef CODE_ACCESS
 112
 113 #else
 114
 115 /* The memory helpers for tcg-generated code need tcg_target_long etc.  */
 116 #include "tcg.h"
 117
 118 #ifdef MMU_MODE0_SUFFIX
 119 #define CPU_MMU_INDEX 0
 120 #define MEMSUFFIX MMU_MODE0_SUFFIX
 121 #define DATA_SIZE 1
 122 #include "exec/cpu_ldst_template.h"
 123
 124 #define DATA_SIZE 2
 125 #include "exec/cpu_ldst_template.h"
 126
 127 #define DATA_SIZE 4
 128 #include "exec/cpu_ldst_template.h"
 129
 130 #define DATA_SIZE 8
 131 #include "exec/cpu_ldst_template.h"
 132 #undef CPU_MMU_INDEX
 133 #undef MEMSUFFIX
 134 #endif
 135
 136 #if (NB_MMU_MODES >= 2) && defined(MMU_MODE1_SUFFIX)
 137 #define CPU_MMU_INDEX 1
 138 #define MEMSUFFIX MMU_MODE1_SUFFIX
 139 #define DATA_SIZE 1
 140 #include "exec/cpu_ldst_template.h"
 141
 142 #define DATA_SIZE 2
 143 #include "exec/cpu_ldst_template.h"
 144
 145 #define DATA_SIZE 4
 146 #include "exec/cpu_ldst_template.h"
 147
 148 #define DATA_SIZE 8
 149 #include "exec/cpu_ldst_template.h"
 150 #undef CPU_MMU_INDEX
 151 #undef MEMSUFFIX
 152 #endif
 153
 154 #if (NB_MMU_MODES >= 3) && defined(MMU_MODE2_SUFFIX)
 155
 156 #define CPU_MMU_INDEX 2
 157 #define MEMSUFFIX MMU_MODE2_SUFFIX
 158 #define DATA_SIZE 1
 159 #include "exec/cpu_ldst_template.h"
 160
 161 #define DATA_SIZE 2
 162 #include "exec/cpu_ldst_template.h"
 163
 164 #define DATA_SIZE 4
 165 #include "exec/cpu_ldst_template.h"
 166
 167 #define DATA_SIZE 8
 168 #include "exec/cpu_ldst_template.h"
 169 #undef CPU_MMU_INDEX
 170 #undef MEMSUFFIX
 171 #endif /* (NB_MMU_MODES >= 3) */
 172
 173 #if (NB_MMU_MODES >= 4) && defined(MMU_MODE3_SUFFIX)
 174
 175 #define CPU_MMU_INDEX 3
 176 #define MEMSUFFIX MMU_MODE3_SUFFIX
 177 #define DATA_SIZE 1
 178 #include "exec/cpu_ldst_template.h"
 179
 180 #define DATA_SIZE 2
 181 #include "exec/cpu_ldst_template.h"
 182
 183 #define DATA_SIZE 4
 184 #include "exec/cpu_ldst_template.h"
 185
 186 #define DATA_SIZE 8
 187 #include "exec/cpu_ldst_template.h"
 188 #undef CPU_MMU_INDEX
 189 #undef MEMSUFFIX
 190 #endif /* (NB_MMU_MODES >= 4) */
 191
 192 #if (NB_MMU_MODES >= 5) && defined(MMU_MODE4_SUFFIX)
 193
 194 #define CPU_MMU_INDEX 4
 195 #define MEMSUFFIX MMU_MODE4_SUFFIX
 196 #define DATA_SIZE 1
 197 #include "exec/cpu_ldst_template.h"
 198
 199 #define DATA_SIZE 2
 200 #include "exec/cpu_ldst_template.h"
 201
 202 #define DATA_SIZE 4
 203 #include "exec/cpu_ldst_template.h"
 204
 205 #define DATA_SIZE 8
 206 #include "exec/cpu_ldst_template.h"
 207 #undef CPU_MMU_INDEX
 208 #undef MEMSUFFIX
 209 #endif /* (NB_MMU_MODES >= 5) */
 210
 211 #if (NB_MMU_MODES >= 6) && defined(MMU_MODE5_SUFFIX)
 212
 213 #define CPU_MMU_INDEX 5
 214 #define MEMSUFFIX MMU_MODE5_SUFFIX
 215 #define DATA_SIZE 1
 216 #include "exec/cpu_ldst_template.h"
 217
 218 #define DATA_SIZE 2
 219 #include "exec/cpu_ldst_template.h"
 220
 221 #define DATA_SIZE 4
 222 #include "exec/cpu_ldst_template.h"
 223
 224 #define DATA_SIZE 8
 225 #include "exec/cpu_ldst_template.h"
 226 #undef CPU_MMU_INDEX
 227 #undef MEMSUFFIX
 228 #endif /* (NB_MMU_MODES >= 6) */
 229
 230 #if (NB_MMU_MODES >= 7) && defined(MMU_MODE6_SUFFIX)
 231
 232 #define CPU_MMU_INDEX 6
 233 #define MEMSUFFIX MMU_MODE6_SUFFIX
 234 #define DATA_SIZE 1
 235 #include "exec/cpu_ldst_template.h"
 236
 237 #define DATA_SIZE 2
 238 #include "exec/cpu_ldst_template.h"
 239
 240 #define DATA_SIZE 4
 241 #include "exec/cpu_ldst_template.h"
 242
 243 #define DATA_SIZE 8
 244 #include "exec/cpu_ldst_template.h"
 245 #undef CPU_MMU_INDEX
 246 #undef MEMSUFFIX
 247 #endif /* (NB_MMU_MODES >= 7) */
 248
 249 #if (NB_MMU_MODES >= 8) && defined(MMU_MODE7_SUFFIX)
 250
 251 #define CPU_MMU_INDEX 7
 252 #define MEMSUFFIX MMU_MODE7_SUFFIX
 253 #define DATA_SIZE 1
 254 #include "exec/cpu_ldst_template.h"
 255
 256 #define DATA_SIZE 2
 257 #include "exec/cpu_ldst_template.h"
 258
 259 #define DATA_SIZE 4
 260 #include "exec/cpu_ldst_template.h"
 261
 262 #define DATA_SIZE 8
 263 #include "exec/cpu_ldst_template.h"
 264 #undef CPU_MMU_INDEX
 265 #undef MEMSUFFIX
 266 #endif /* (NB_MMU_MODES >= 8) */
 267
 268 #if (NB_MMU_MODES >= 9) && defined(MMU_MODE8_SUFFIX)
 269
 270 #define CPU_MMU_INDEX 8
 271 #define MEMSUFFIX MMU_MODE8_SUFFIX
 272 #define DATA_SIZE 1
 273 #include "exec/cpu_ldst_template.h"
 274
 275 #define DATA_SIZE 2
 276 #include "exec/cpu_ldst_template.h"
 277
 278 #define DATA_SIZE 4
 279 #include "exec/cpu_ldst_template.h"
 280
 281 #define DATA_SIZE 8
 282 #include "exec/cpu_ldst_template.h"
 283 #undef CPU_MMU_INDEX
 284 #undef MEMSUFFIX
 285 #endif /* (NB_MMU_MODES >= 9) */
 286
 287 #if (NB_MMU_MODES >= 10) && defined(MMU_MODE9_SUFFIX)
 288
 289 #define CPU_MMU_INDEX 9
 290 #define MEMSUFFIX MMU_MODE9_SUFFIX
 291 #define DATA_SIZE 1
 292 #include "exec/cpu_ldst_template.h"
 293
 294 #define DATA_SIZE 2
 295 #include "exec/cpu_ldst_template.h"
 296
 297 #define DATA_SIZE 4
 298 #include "exec/cpu_ldst_template.h"
 299
 300 #define DATA_SIZE 8
 301 #include "exec/cpu_ldst_template.h"
 302 #undef CPU_MMU_INDEX
 303 #undef MEMSUFFIX
 304 #endif /* (NB_MMU_MODES >= 10) */
 305
 306 #if (NB_MMU_MODES >= 11) && defined(MMU_MODE10_SUFFIX)
 307
 308 #define CPU_MMU_INDEX 10
 309 #define MEMSUFFIX MMU_MODE10_SUFFIX
 310 #define DATA_SIZE 1
 311 #include "exec/cpu_ldst_template.h"
 312
 313 #define DATA_SIZE 2
 314 #include "exec/cpu_ldst_template.h"
 315
 316 #define DATA_SIZE 4
 317 #include "exec/cpu_ldst_template.h"
 318
 319 #define DATA_SIZE 8
 320 #include "exec/cpu_ldst_template.h"
 321 #undef CPU_MMU_INDEX
 322 #undef MEMSUFFIX
 323 #endif /* (NB_MMU_MODES >= 11) */
 324
 325 #if (NB_MMU_MODES >= 12) && defined(MMU_MODE11_SUFFIX)
 326
 327 #define CPU_MMU_INDEX 11
 328 #define MEMSUFFIX MMU_MODE11_SUFFIX
 329 #define DATA_SIZE 1
 330 #include "exec/cpu_ldst_template.h"
 331
 332 #define DATA_SIZE 2
 333 #include "exec/cpu_ldst_template.h"
 334
 335 #define DATA_SIZE 4
 336 #include "exec/cpu_ldst_template.h"
 337
 338 #define DATA_SIZE 8
 339 #include "exec/cpu_ldst_template.h"
 340 #undef CPU_MMU_INDEX
 341 #undef MEMSUFFIX
 342 #endif /* (NB_MMU_MODES >= 12) */
 343
 344 #if (NB_MMU_MODES > 12)
 345 #error "NB_MMU_MODES > 12 is not supported for now"
 346 #endif /* (NB_MMU_MODES > 12) */
 347
 348 /* these access are slower, they must be as rare as possible */
 349 #define CPU_MMU_INDEX (cpu_mmu_index(env, false))
 350 #define MEMSUFFIX _data
 351 #define DATA_SIZE 1
 352 #include "exec/cpu_ldst_template.h"
 353
 354 #define DATA_SIZE 2
 355 #include "exec/cpu_ldst_template.h"
 356
 357 #define DATA_SIZE 4
 358 #include "exec/cpu_ldst_template.h"
 359
 360 #define DATA_SIZE 8
 361 #include "exec/cpu_ldst_template.h"
 362 #undef CPU_MMU_INDEX
 363 #undef MEMSUFFIX
 364
 365 #define CPU_MMU_INDEX (cpu_mmu_index(env, true))
 366 #define MEMSUFFIX _code
 367 #define SOFTMMU_CODE_ACCESS
 368
 369 #define DATA_SIZE 1
 370 #include "exec/cpu_ldst_template.h"
 371
 372 #define DATA_SIZE 2
 373 #include "exec/cpu_ldst_template.h"
 374
 375 #define DATA_SIZE 4
 376 #include "exec/cpu_ldst_template.h"
 377
 378 #define DATA_SIZE 8
 379 #include "exec/cpu_ldst_template.h"
 380
 381 #undef CPU_MMU_INDEX
 382 #undef MEMSUFFIX
 383 #undef SOFTMMU_CODE_ACCESS
 384
 385 #endif /* defined(CONFIG_USER_ONLY) */
 386
 387 /**
 388  * tlb_vaddr_to_host:
 389  * @env: CPUArchState
 390  * @addr: guest virtual address to look up
 391  * @access_type: 0 for read, 1 for write, 2 for execute
 392  * @mmu_idx: MMU index to use for lookup
 393  *
 394  * Look up the specified guest virtual index in the TCG softmmu TLB.
 395  * If the TLB contains a host virtual address suitable for direct RAM
 396  * access, then return it. Otherwise (TLB miss, TLB entry is for an
 397  * I/O access, etc) return NULL.
 398  *
 399  * This is the equivalent of the initial fast-path code used by
 400  * TCG backends for guest load and store accesses.
 401  */
 402 static inline void *tlb_vaddr_to_host(CPUArchState *env, target_ulong addr,
 403                                       int access_type, int mmu_idx)
 404 {
 405 #if defined(CONFIG_USER_ONLY)
 406     return g2h(addr);
 407 #else
 408     int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 409     CPUTLBEntry *tlbentry = &env->tlb_table[mmu_idx][index];
 410     target_ulong tlb_addr;
 411     uintptr_t haddr;
 412
 413     switch (access_type) {
 414     case 0:
 415         tlb_addr = tlbentry->addr_read;
 416         break;
 417     case 1:
 418         tlb_addr = tlbentry->addr_write;
 419         break;
 420     case 2:
 421         tlb_addr = tlbentry->addr_code;
 422         break;
 423     default:
 424         g_assert_not_reached();
 425     }
 426
 427     if ((addr & TARGET_PAGE_MASK)
 428         != (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
 429         /* TLB entry is for a different page */
 430         return NULL;
 431     }
 432
 433     if (tlb_addr & ~TARGET_PAGE_MASK) {
 434         /* IO access */
 435         return NULL;
 436     }
 437
 438     haddr = addr + env->tlb_table[mmu_idx][index].addend;
 439     return (void *)haddr;
 440 #endif /* defined(CONFIG_USER_ONLY) */
 441 }
 442
 443 #endif /* CPU_LDST_H */