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/* 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 */ 400static 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(vaddr); 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 */ 442