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 #define guest_addr_valid(x) ((x) <= GUEST_ADDR_MAX)
  55 #define h2g_valid(x) guest_addr_valid((unsigned long)(x) - guest_base)
  56
  57 static inline int guest_range_valid(unsigned long start, unsigned long len)
  58 {
  59     return len - 1 <= GUEST_ADDR_MAX && start <= GUEST_ADDR_MAX - len + 1;
  60 }
  61
  62 #define h2g_nocheck(x) ({ \
  63     unsigned long __ret = (unsigned long)(x) - guest_base; \
  64     (abi_ulong)__ret; \
  65 })
  66
  67 #define h2g(x) ({ \
  68     /* Check if given address fits target address space */ \
  69     assert(h2g_valid(x)); \
  70     h2g_nocheck(x); \
  71 })
  72
  73 #endif
  74
  75 #if defined(CONFIG_USER_ONLY)
  76
  77 extern __thread uintptr_t helper_retaddr;
  78
  79 /* In user-only mode we provide only the _code and _data accessors. */
  80
  81 #define MEMSUFFIX _data
  82 #define DATA_SIZE 1
  83 #include "exec/cpu_ldst_useronly_template.h"
  84
  85 #define DATA_SIZE 2
  86 #include "exec/cpu_ldst_useronly_template.h"
  87
  88 #define DATA_SIZE 4
  89 #include "exec/cpu_ldst_useronly_template.h"
  90
  91 #define DATA_SIZE 8
  92 #include "exec/cpu_ldst_useronly_template.h"
  93 #undef MEMSUFFIX
  94
  95 #define MEMSUFFIX _code
  96 #define CODE_ACCESS
  97 #define DATA_SIZE 1
  98 #include "exec/cpu_ldst_useronly_template.h"
  99
 100 #define DATA_SIZE 2
 101 #include "exec/cpu_ldst_useronly_template.h"
 102
 103 #define DATA_SIZE 4
 104 #include "exec/cpu_ldst_useronly_template.h"
 105
 106 #define DATA_SIZE 8
 107 #include "exec/cpu_ldst_useronly_template.h"
 108 #undef MEMSUFFIX
 109 #undef CODE_ACCESS
 110
 111 #else
 112
 113 /* The memory helpers for tcg-generated code need tcg_target_long etc.  */
 114 #include "tcg.h"
 115
 116 #ifdef MMU_MODE0_SUFFIX
 117 #define CPU_MMU_INDEX 0
 118 #define MEMSUFFIX MMU_MODE0_SUFFIX
 119 #define DATA_SIZE 1
 120 #include "exec/cpu_ldst_template.h"
 121
 122 #define DATA_SIZE 2
 123 #include "exec/cpu_ldst_template.h"
 124
 125 #define DATA_SIZE 4
 126 #include "exec/cpu_ldst_template.h"
 127
 128 #define DATA_SIZE 8
 129 #include "exec/cpu_ldst_template.h"
 130 #undef CPU_MMU_INDEX
 131 #undef MEMSUFFIX
 132 #endif
 133
 134 #if (NB_MMU_MODES >= 2) && defined(MMU_MODE1_SUFFIX)
 135 #define CPU_MMU_INDEX 1
 136 #define MEMSUFFIX MMU_MODE1_SUFFIX
 137 #define DATA_SIZE 1
 138 #include "exec/cpu_ldst_template.h"
 139
 140 #define DATA_SIZE 2
 141 #include "exec/cpu_ldst_template.h"
 142
 143 #define DATA_SIZE 4
 144 #include "exec/cpu_ldst_template.h"
 145
 146 #define DATA_SIZE 8
 147 #include "exec/cpu_ldst_template.h"
 148 #undef CPU_MMU_INDEX
 149 #undef MEMSUFFIX
 150 #endif
 151
 152 #if (NB_MMU_MODES >= 3) && defined(MMU_MODE2_SUFFIX)
 153
 154 #define CPU_MMU_INDEX 2
 155 #define MEMSUFFIX MMU_MODE2_SUFFIX
 156 #define DATA_SIZE 1
 157 #include "exec/cpu_ldst_template.h"
 158
 159 #define DATA_SIZE 2
 160 #include "exec/cpu_ldst_template.h"
 161
 162 #define DATA_SIZE 4
 163 #include "exec/cpu_ldst_template.h"
 164
 165 #define DATA_SIZE 8
 166 #include "exec/cpu_ldst_template.h"
 167 #undef CPU_MMU_INDEX
 168 #undef MEMSUFFIX
 169 #endif /* (NB_MMU_MODES >= 3) */
 170
 171 #if (NB_MMU_MODES >= 4) && defined(MMU_MODE3_SUFFIX)
 172
 173 #define CPU_MMU_INDEX 3
 174 #define MEMSUFFIX MMU_MODE3_SUFFIX
 175 #define DATA_SIZE 1
 176 #include "exec/cpu_ldst_template.h"
 177
 178 #define DATA_SIZE 2
 179 #include "exec/cpu_ldst_template.h"
 180
 181 #define DATA_SIZE 4
 182 #include "exec/cpu_ldst_template.h"
 183
 184 #define DATA_SIZE 8
 185 #include "exec/cpu_ldst_template.h"
 186 #undef CPU_MMU_INDEX
 187 #undef MEMSUFFIX
 188 #endif /* (NB_MMU_MODES >= 4) */
 189
 190 #if (NB_MMU_MODES >= 5) && defined(MMU_MODE4_SUFFIX)
 191
 192 #define CPU_MMU_INDEX 4
 193 #define MEMSUFFIX MMU_MODE4_SUFFIX
 194 #define DATA_SIZE 1
 195 #include "exec/cpu_ldst_template.h"
 196
 197 #define DATA_SIZE 2
 198 #include "exec/cpu_ldst_template.h"
 199
 200 #define DATA_SIZE 4
 201 #include "exec/cpu_ldst_template.h"
 202
 203 #define DATA_SIZE 8
 204 #include "exec/cpu_ldst_template.h"
 205 #undef CPU_MMU_INDEX
 206 #undef MEMSUFFIX
 207 #endif /* (NB_MMU_MODES >= 5) */
 208
 209 #if (NB_MMU_MODES >= 6) && defined(MMU_MODE5_SUFFIX)
 210
 211 #define CPU_MMU_INDEX 5
 212 #define MEMSUFFIX MMU_MODE5_SUFFIX
 213 #define DATA_SIZE 1
 214 #include "exec/cpu_ldst_template.h"
 215
 216 #define DATA_SIZE 2
 217 #include "exec/cpu_ldst_template.h"
 218
 219 #define DATA_SIZE 4
 220 #include "exec/cpu_ldst_template.h"
 221
 222 #define DATA_SIZE 8
 223 #include "exec/cpu_ldst_template.h"
 224 #undef CPU_MMU_INDEX
 225 #undef MEMSUFFIX
 226 #endif /* (NB_MMU_MODES >= 6) */
 227
 228 #if (NB_MMU_MODES >= 7) && defined(MMU_MODE6_SUFFIX)
 229
 230 #define CPU_MMU_INDEX 6
 231 #define MEMSUFFIX MMU_MODE6_SUFFIX
 232 #define DATA_SIZE 1
 233 #include "exec/cpu_ldst_template.h"
 234
 235 #define DATA_SIZE 2
 236 #include "exec/cpu_ldst_template.h"
 237
 238 #define DATA_SIZE 4
 239 #include "exec/cpu_ldst_template.h"
 240
 241 #define DATA_SIZE 8
 242 #include "exec/cpu_ldst_template.h"
 243 #undef CPU_MMU_INDEX
 244 #undef MEMSUFFIX
 245 #endif /* (NB_MMU_MODES >= 7) */
 246
 247 #if (NB_MMU_MODES >= 8) && defined(MMU_MODE7_SUFFIX)
 248
 249 #define CPU_MMU_INDEX 7
 250 #define MEMSUFFIX MMU_MODE7_SUFFIX
 251 #define DATA_SIZE 1
 252 #include "exec/cpu_ldst_template.h"
 253
 254 #define DATA_SIZE 2
 255 #include "exec/cpu_ldst_template.h"
 256
 257 #define DATA_SIZE 4
 258 #include "exec/cpu_ldst_template.h"
 259
 260 #define DATA_SIZE 8
 261 #include "exec/cpu_ldst_template.h"
 262 #undef CPU_MMU_INDEX
 263 #undef MEMSUFFIX
 264 #endif /* (NB_MMU_MODES >= 8) */
 265
 266 #if (NB_MMU_MODES >= 9) && defined(MMU_MODE8_SUFFIX)
 267
 268 #define CPU_MMU_INDEX 8
 269 #define MEMSUFFIX MMU_MODE8_SUFFIX
 270 #define DATA_SIZE 1
 271 #include "exec/cpu_ldst_template.h"
 272
 273 #define DATA_SIZE 2
 274 #include "exec/cpu_ldst_template.h"
 275
 276 #define DATA_SIZE 4
 277 #include "exec/cpu_ldst_template.h"
 278
 279 #define DATA_SIZE 8
 280 #include "exec/cpu_ldst_template.h"
 281 #undef CPU_MMU_INDEX
 282 #undef MEMSUFFIX
 283 #endif /* (NB_MMU_MODES >= 9) */
 284
 285 #if (NB_MMU_MODES >= 10) && defined(MMU_MODE9_SUFFIX)
 286
 287 #define CPU_MMU_INDEX 9
 288 #define MEMSUFFIX MMU_MODE9_SUFFIX
 289 #define DATA_SIZE 1
 290 #include "exec/cpu_ldst_template.h"
 291
 292 #define DATA_SIZE 2
 293 #include "exec/cpu_ldst_template.h"
 294
 295 #define DATA_SIZE 4
 296 #include "exec/cpu_ldst_template.h"
 297
 298 #define DATA_SIZE 8
 299 #include "exec/cpu_ldst_template.h"
 300 #undef CPU_MMU_INDEX
 301 #undef MEMSUFFIX
 302 #endif /* (NB_MMU_MODES >= 10) */
 303
 304 #if (NB_MMU_MODES >= 11) && defined(MMU_MODE10_SUFFIX)
 305
 306 #define CPU_MMU_INDEX 10
 307 #define MEMSUFFIX MMU_MODE10_SUFFIX
 308 #define DATA_SIZE 1
 309 #include "exec/cpu_ldst_template.h"
 310
 311 #define DATA_SIZE 2
 312 #include "exec/cpu_ldst_template.h"
 313
 314 #define DATA_SIZE 4
 315 #include "exec/cpu_ldst_template.h"
 316
 317 #define DATA_SIZE 8
 318 #include "exec/cpu_ldst_template.h"
 319 #undef CPU_MMU_INDEX
 320 #undef MEMSUFFIX
 321 #endif /* (NB_MMU_MODES >= 11) */
 322
 323 #if (NB_MMU_MODES >= 12) && defined(MMU_MODE11_SUFFIX)
 324
 325 #define CPU_MMU_INDEX 11
 326 #define MEMSUFFIX MMU_MODE11_SUFFIX
 327 #define DATA_SIZE 1
 328 #include "exec/cpu_ldst_template.h"
 329
 330 #define DATA_SIZE 2
 331 #include "exec/cpu_ldst_template.h"
 332
 333 #define DATA_SIZE 4
 334 #include "exec/cpu_ldst_template.h"
 335
 336 #define DATA_SIZE 8
 337 #include "exec/cpu_ldst_template.h"
 338 #undef CPU_MMU_INDEX
 339 #undef MEMSUFFIX
 340 #endif /* (NB_MMU_MODES >= 12) */
 341
 342 #if (NB_MMU_MODES > 12)
 343 #error "NB_MMU_MODES > 12 is not supported for now"
 344 #endif /* (NB_MMU_MODES > 12) */
 345
 346 /* these access are slower, they must be as rare as possible */
 347 #define CPU_MMU_INDEX (cpu_mmu_index(env, false))
 348 #define MEMSUFFIX _data
 349 #define DATA_SIZE 1
 350 #include "exec/cpu_ldst_template.h"
 351
 352 #define DATA_SIZE 2
 353 #include "exec/cpu_ldst_template.h"
 354
 355 #define DATA_SIZE 4
 356 #include "exec/cpu_ldst_template.h"
 357
 358 #define DATA_SIZE 8
 359 #include "exec/cpu_ldst_template.h"
 360 #undef CPU_MMU_INDEX
 361 #undef MEMSUFFIX
 362
 363 #define CPU_MMU_INDEX (cpu_mmu_index(env, true))
 364 #define MEMSUFFIX _code
 365 #define SOFTMMU_CODE_ACCESS
 366
 367 #define DATA_SIZE 1
 368 #include "exec/cpu_ldst_template.h"
 369
 370 #define DATA_SIZE 2
 371 #include "exec/cpu_ldst_template.h"
 372
 373 #define DATA_SIZE 4
 374 #include "exec/cpu_ldst_template.h"
 375
 376 #define DATA_SIZE 8
 377 #include "exec/cpu_ldst_template.h"
 378
 379 #undef CPU_MMU_INDEX
 380 #undef MEMSUFFIX
 381 #undef SOFTMMU_CODE_ACCESS
 382
 383 #endif /* defined(CONFIG_USER_ONLY) */
 384
 385 /**
 386  * tlb_vaddr_to_host:
 387  * @env: CPUArchState
 388  * @addr: guest virtual address to look up
 389  * @access_type: 0 for read, 1 for write, 2 for execute
 390  * @mmu_idx: MMU index to use for lookup
 391  *
 392  * Look up the specified guest virtual index in the TCG softmmu TLB.
 393  * If the TLB contains a host virtual address suitable for direct RAM
 394  * access, then return it. Otherwise (TLB miss, TLB entry is for an
 395  * I/O access, etc) return NULL.
 396  *
 397  * This is the equivalent of the initial fast-path code used by
 398  * TCG backends for guest load and store accesses.
 399  */
 400 static inline void *tlb_vaddr_to_host(CPUArchState *env, target_ulong addr,
 401                                       int access_type, int mmu_idx)
 402 {
 403 #if defined(CONFIG_USER_ONLY)
 404     return g2h(addr);
 405 #else
 406     int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 407     CPUTLBEntry *tlbentry = &env->tlb_table[mmu_idx][index];
 408     target_ulong tlb_addr;
 409     uintptr_t haddr;
 410
 411     switch (access_type) {
 412     case 0:
 413         tlb_addr = tlbentry->addr_read;
 414         break;
 415     case 1:
 416         tlb_addr = tlbentry->addr_write;
 417         break;
 418     case 2:
 419         tlb_addr = tlbentry->addr_code;
 420         break;
 421     default:
 422         g_assert_not_reached();
 423     }
 424
 425     if ((addr & TARGET_PAGE_MASK)
 426         != (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
 427         /* TLB entry is for a different page */
 428         return NULL;
 429     }
 430
 431     if (tlb_addr & ~TARGET_PAGE_MASK) {
 432         /* IO access */
 433         return NULL;
 434     }
 435
 436     haddr = addr + env->tlb_table[mmu_idx][index].addend;
 437     return (void *)haddr;
 438 #endif /* defined(CONFIG_USER_ONLY) */
 439 }
 440
 441 #endif /* CPU_LDST_H */