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 */ 444