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 79extern __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 */ 402static 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