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 /* sparc32plus has 64bit long but 32bit space address
  52  * this can make bad result with g2h() and h2g()
  53  */
  54 #if TARGET_VIRT_ADDR_SPACE_BITS <= 32
  55 typedef uint32_t abi_ptr;
  56 #define TARGET_ABI_FMT_ptr "%x"
  57 #else
  58 typedef uint64_t abi_ptr;
  59 #define TARGET_ABI_FMT_ptr "%"PRIx64
  60 #endif
  61
  62 /* All direct uses of g2h and h2g need to go away for usermode softmmu.  */
  63 #define g2h(x) ((void *)((unsigned long)(abi_ptr)(x) + guest_base))
  64
  65 #define guest_addr_valid(x) ((x) <= GUEST_ADDR_MAX)
  66 #define h2g_valid(x) guest_addr_valid((unsigned long)(x) - guest_base)
  67
  68 static inline int guest_range_valid(unsigned long start, unsigned long len)
  69 {
  70     return len - 1 <= GUEST_ADDR_MAX && start <= GUEST_ADDR_MAX - len + 1;
  71 }
  72
  73 #define h2g_nocheck(x) ({ \
  74     unsigned long __ret = (unsigned long)(x) - guest_base; \
  75     (abi_ptr)__ret; \
  76 })
  77
  78 #define h2g(x) ({ \
  79     /* Check if given address fits target address space */ \
  80     assert(h2g_valid(x)); \
  81     h2g_nocheck(x); \
  82 })
  83 #else
  84 typedef target_ulong abi_ptr;
  85 #define TARGET_ABI_FMT_ptr TARGET_ABI_FMT_lx
  86 #endif
  87
  88 #if defined(CONFIG_USER_ONLY)
  89
  90 extern __thread uintptr_t helper_retaddr;
  91
  92 /* In user-only mode we provide only the _code and _data accessors. */
  93
  94 #define MEMSUFFIX _data
  95 #define DATA_SIZE 1
  96 #include "exec/cpu_ldst_useronly_template.h"
  97
  98 #define DATA_SIZE 2
  99 #include "exec/cpu_ldst_useronly_template.h"
 100
 101 #define DATA_SIZE 4
 102 #include "exec/cpu_ldst_useronly_template.h"
 103
 104 #define DATA_SIZE 8
 105 #include "exec/cpu_ldst_useronly_template.h"
 106 #undef MEMSUFFIX
 107
 108 #define MEMSUFFIX _code
 109 #define CODE_ACCESS
 110 #define DATA_SIZE 1
 111 #include "exec/cpu_ldst_useronly_template.h"
 112
 113 #define DATA_SIZE 2
 114 #include "exec/cpu_ldst_useronly_template.h"
 115
 116 #define DATA_SIZE 4
 117 #include "exec/cpu_ldst_useronly_template.h"
 118
 119 #define DATA_SIZE 8
 120 #include "exec/cpu_ldst_useronly_template.h"
 121 #undef MEMSUFFIX
 122 #undef CODE_ACCESS
 123
 124 #else
 125
 126 /* The memory helpers for tcg-generated code need tcg_target_long etc.  */
 127 #include "tcg.h"
 128
 129 #ifdef MMU_MODE0_SUFFIX
 130 #define CPU_MMU_INDEX 0
 131 #define MEMSUFFIX MMU_MODE0_SUFFIX
 132 #define DATA_SIZE 1
 133 #include "exec/cpu_ldst_template.h"
 134
 135 #define DATA_SIZE 2
 136 #include "exec/cpu_ldst_template.h"
 137
 138 #define DATA_SIZE 4
 139 #include "exec/cpu_ldst_template.h"
 140
 141 #define DATA_SIZE 8
 142 #include "exec/cpu_ldst_template.h"
 143 #undef CPU_MMU_INDEX
 144 #undef MEMSUFFIX
 145 #endif
 146
 147 #if (NB_MMU_MODES >= 2) && defined(MMU_MODE1_SUFFIX)
 148 #define CPU_MMU_INDEX 1
 149 #define MEMSUFFIX MMU_MODE1_SUFFIX
 150 #define DATA_SIZE 1
 151 #include "exec/cpu_ldst_template.h"
 152
 153 #define DATA_SIZE 2
 154 #include "exec/cpu_ldst_template.h"
 155
 156 #define DATA_SIZE 4
 157 #include "exec/cpu_ldst_template.h"
 158
 159 #define DATA_SIZE 8
 160 #include "exec/cpu_ldst_template.h"
 161 #undef CPU_MMU_INDEX
 162 #undef MEMSUFFIX
 163 #endif
 164
 165 #if (NB_MMU_MODES >= 3) && defined(MMU_MODE2_SUFFIX)
 166
 167 #define CPU_MMU_INDEX 2
 168 #define MEMSUFFIX MMU_MODE2_SUFFIX
 169 #define DATA_SIZE 1
 170 #include "exec/cpu_ldst_template.h"
 171
 172 #define DATA_SIZE 2
 173 #include "exec/cpu_ldst_template.h"
 174
 175 #define DATA_SIZE 4
 176 #include "exec/cpu_ldst_template.h"
 177
 178 #define DATA_SIZE 8
 179 #include "exec/cpu_ldst_template.h"
 180 #undef CPU_MMU_INDEX
 181 #undef MEMSUFFIX
 182 #endif /* (NB_MMU_MODES >= 3) */
 183
 184 #if (NB_MMU_MODES >= 4) && defined(MMU_MODE3_SUFFIX)
 185
 186 #define CPU_MMU_INDEX 3
 187 #define MEMSUFFIX MMU_MODE3_SUFFIX
 188 #define DATA_SIZE 1
 189 #include "exec/cpu_ldst_template.h"
 190
 191 #define DATA_SIZE 2
 192 #include "exec/cpu_ldst_template.h"
 193
 194 #define DATA_SIZE 4
 195 #include "exec/cpu_ldst_template.h"
 196
 197 #define DATA_SIZE 8
 198 #include "exec/cpu_ldst_template.h"
 199 #undef CPU_MMU_INDEX
 200 #undef MEMSUFFIX
 201 #endif /* (NB_MMU_MODES >= 4) */
 202
 203 #if (NB_MMU_MODES >= 5) && defined(MMU_MODE4_SUFFIX)
 204
 205 #define CPU_MMU_INDEX 4
 206 #define MEMSUFFIX MMU_MODE4_SUFFIX
 207 #define DATA_SIZE 1
 208 #include "exec/cpu_ldst_template.h"
 209
 210 #define DATA_SIZE 2
 211 #include "exec/cpu_ldst_template.h"
 212
 213 #define DATA_SIZE 4
 214 #include "exec/cpu_ldst_template.h"
 215
 216 #define DATA_SIZE 8
 217 #include "exec/cpu_ldst_template.h"
 218 #undef CPU_MMU_INDEX
 219 #undef MEMSUFFIX
 220 #endif /* (NB_MMU_MODES >= 5) */
 221
 222 #if (NB_MMU_MODES >= 6) && defined(MMU_MODE5_SUFFIX)
 223
 224 #define CPU_MMU_INDEX 5
 225 #define MEMSUFFIX MMU_MODE5_SUFFIX
 226 #define DATA_SIZE 1
 227 #include "exec/cpu_ldst_template.h"
 228
 229 #define DATA_SIZE 2
 230 #include "exec/cpu_ldst_template.h"
 231
 232 #define DATA_SIZE 4
 233 #include "exec/cpu_ldst_template.h"
 234
 235 #define DATA_SIZE 8
 236 #include "exec/cpu_ldst_template.h"
 237 #undef CPU_MMU_INDEX
 238 #undef MEMSUFFIX
 239 #endif /* (NB_MMU_MODES >= 6) */
 240
 241 #if (NB_MMU_MODES >= 7) && defined(MMU_MODE6_SUFFIX)
 242
 243 #define CPU_MMU_INDEX 6
 244 #define MEMSUFFIX MMU_MODE6_SUFFIX
 245 #define DATA_SIZE 1
 246 #include "exec/cpu_ldst_template.h"
 247
 248 #define DATA_SIZE 2
 249 #include "exec/cpu_ldst_template.h"
 250
 251 #define DATA_SIZE 4
 252 #include "exec/cpu_ldst_template.h"
 253
 254 #define DATA_SIZE 8
 255 #include "exec/cpu_ldst_template.h"
 256 #undef CPU_MMU_INDEX
 257 #undef MEMSUFFIX
 258 #endif /* (NB_MMU_MODES >= 7) */
 259
 260 #if (NB_MMU_MODES >= 8) && defined(MMU_MODE7_SUFFIX)
 261
 262 #define CPU_MMU_INDEX 7
 263 #define MEMSUFFIX MMU_MODE7_SUFFIX
 264 #define DATA_SIZE 1
 265 #include "exec/cpu_ldst_template.h"
 266
 267 #define DATA_SIZE 2
 268 #include "exec/cpu_ldst_template.h"
 269
 270 #define DATA_SIZE 4
 271 #include "exec/cpu_ldst_template.h"
 272
 273 #define DATA_SIZE 8
 274 #include "exec/cpu_ldst_template.h"
 275 #undef CPU_MMU_INDEX
 276 #undef MEMSUFFIX
 277 #endif /* (NB_MMU_MODES >= 8) */
 278
 279 #if (NB_MMU_MODES >= 9) && defined(MMU_MODE8_SUFFIX)
 280
 281 #define CPU_MMU_INDEX 8
 282 #define MEMSUFFIX MMU_MODE8_SUFFIX
 283 #define DATA_SIZE 1
 284 #include "exec/cpu_ldst_template.h"
 285
 286 #define DATA_SIZE 2
 287 #include "exec/cpu_ldst_template.h"
 288
 289 #define DATA_SIZE 4
 290 #include "exec/cpu_ldst_template.h"
 291
 292 #define DATA_SIZE 8
 293 #include "exec/cpu_ldst_template.h"
 294 #undef CPU_MMU_INDEX
 295 #undef MEMSUFFIX
 296 #endif /* (NB_MMU_MODES >= 9) */
 297
 298 #if (NB_MMU_MODES >= 10) && defined(MMU_MODE9_SUFFIX)
 299
 300 #define CPU_MMU_INDEX 9
 301 #define MEMSUFFIX MMU_MODE9_SUFFIX
 302 #define DATA_SIZE 1
 303 #include "exec/cpu_ldst_template.h"
 304
 305 #define DATA_SIZE 2
 306 #include "exec/cpu_ldst_template.h"
 307
 308 #define DATA_SIZE 4
 309 #include "exec/cpu_ldst_template.h"
 310
 311 #define DATA_SIZE 8
 312 #include "exec/cpu_ldst_template.h"
 313 #undef CPU_MMU_INDEX
 314 #undef MEMSUFFIX
 315 #endif /* (NB_MMU_MODES >= 10) */
 316
 317 #if (NB_MMU_MODES >= 11) && defined(MMU_MODE10_SUFFIX)
 318
 319 #define CPU_MMU_INDEX 10
 320 #define MEMSUFFIX MMU_MODE10_SUFFIX
 321 #define DATA_SIZE 1
 322 #include "exec/cpu_ldst_template.h"
 323
 324 #define DATA_SIZE 2
 325 #include "exec/cpu_ldst_template.h"
 326
 327 #define DATA_SIZE 4
 328 #include "exec/cpu_ldst_template.h"
 329
 330 #define DATA_SIZE 8
 331 #include "exec/cpu_ldst_template.h"
 332 #undef CPU_MMU_INDEX
 333 #undef MEMSUFFIX
 334 #endif /* (NB_MMU_MODES >= 11) */
 335
 336 #if (NB_MMU_MODES >= 12) && defined(MMU_MODE11_SUFFIX)
 337
 338 #define CPU_MMU_INDEX 11
 339 #define MEMSUFFIX MMU_MODE11_SUFFIX
 340 #define DATA_SIZE 1
 341 #include "exec/cpu_ldst_template.h"
 342
 343 #define DATA_SIZE 2
 344 #include "exec/cpu_ldst_template.h"
 345
 346 #define DATA_SIZE 4
 347 #include "exec/cpu_ldst_template.h"
 348
 349 #define DATA_SIZE 8
 350 #include "exec/cpu_ldst_template.h"
 351 #undef CPU_MMU_INDEX
 352 #undef MEMSUFFIX
 353 #endif /* (NB_MMU_MODES >= 12) */
 354
 355 #if (NB_MMU_MODES > 12)
 356 #error "NB_MMU_MODES > 12 is not supported for now"
 357 #endif /* (NB_MMU_MODES > 12) */
 358
 359 /* these access are slower, they must be as rare as possible */
 360 #define CPU_MMU_INDEX (cpu_mmu_index(env, false))
 361 #define MEMSUFFIX _data
 362 #define DATA_SIZE 1
 363 #include "exec/cpu_ldst_template.h"
 364
 365 #define DATA_SIZE 2
 366 #include "exec/cpu_ldst_template.h"
 367
 368 #define DATA_SIZE 4
 369 #include "exec/cpu_ldst_template.h"
 370
 371 #define DATA_SIZE 8
 372 #include "exec/cpu_ldst_template.h"
 373 #undef CPU_MMU_INDEX
 374 #undef MEMSUFFIX
 375
 376 #define CPU_MMU_INDEX (cpu_mmu_index(env, true))
 377 #define MEMSUFFIX _code
 378 #define SOFTMMU_CODE_ACCESS
 379
 380 #define DATA_SIZE 1
 381 #include "exec/cpu_ldst_template.h"
 382
 383 #define DATA_SIZE 2
 384 #include "exec/cpu_ldst_template.h"
 385
 386 #define DATA_SIZE 4
 387 #include "exec/cpu_ldst_template.h"
 388
 389 #define DATA_SIZE 8
 390 #include "exec/cpu_ldst_template.h"
 391
 392 #undef CPU_MMU_INDEX
 393 #undef MEMSUFFIX
 394 #undef SOFTMMU_CODE_ACCESS
 395
 396 #endif /* defined(CONFIG_USER_ONLY) */
 397
 398 /**
 399  * tlb_vaddr_to_host:
 400  * @env: CPUArchState
 401  * @addr: guest virtual address to look up
 402  * @access_type: 0 for read, 1 for write, 2 for execute
 403  * @mmu_idx: MMU index to use for lookup
 404  *
 405  * Look up the specified guest virtual index in the TCG softmmu TLB.
 406  * If the TLB contains a host virtual address suitable for direct RAM
 407  * access, then return it. Otherwise (TLB miss, TLB entry is for an
 408  * I/O access, etc) return NULL.
 409  *
 410  * This is the equivalent of the initial fast-path code used by
 411  * TCG backends for guest load and store accesses.
 412  */
 413 static inline void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
 414                                       int access_type, int mmu_idx)
 415 {
 416 #if defined(CONFIG_USER_ONLY)
 417     return g2h(addr);
 418 #else
 419     int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 420     CPUTLBEntry *tlbentry = &env->tlb_table[mmu_idx][index];
 421     abi_ptr tlb_addr;
 422     uintptr_t haddr;
 423
 424     switch (access_type) {
 425     case 0:
 426         tlb_addr = tlbentry->addr_read;
 427         break;
 428     case 1:
 429         tlb_addr = tlbentry->addr_write;
 430         break;
 431     case 2:
 432         tlb_addr = tlbentry->addr_code;
 433         break;
 434     default:
 435         g_assert_not_reached();
 436     }
 437
 438     if (!tlb_hit(tlb_addr, addr)) {
 439         /* TLB entry is for a different page */
 440         return NULL;
 441     }
 442
 443     if (tlb_addr & ~TARGET_PAGE_MASK) {
 444         /* IO access */
 445         return NULL;
 446     }
 447
 448     haddr = addr + env->tlb_table[mmu_idx][index].addend;
 449     return (void *)haddr;
 450 #endif /* defined(CONFIG_USER_ONLY) */
 451 }
 452
 453 #endif /* CPU_LDST_H */