1 /* 2 * Copyright (c) 2011 - 2019, Max Filippov, Open Source and Linux Lab. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * * Neither the name of the Open Source and Linux Lab nor the 13 * names of its contributors may be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "qemu/osdep.h" 29 #include "qemu/log.h" 30 #include "qemu/qemu-print.h" 31 #include "qemu/units.h" 32 #include "cpu.h" 33 #include "exec/helper-proto.h" 34 #include "qemu/host-utils.h" 35 #include "exec/exec-all.h" 36 #include "exec/page-protection.h" 37 38 #define XTENSA_MPU_SEGMENT_MASK 0x0000001f 39 #define XTENSA_MPU_ACC_RIGHTS_MASK 0x00000f00 40 #define XTENSA_MPU_ACC_RIGHTS_SHIFT 8 41 #define XTENSA_MPU_MEM_TYPE_MASK 0x001ff000 42 #define XTENSA_MPU_MEM_TYPE_SHIFT 12 43 #define XTENSA_MPU_ATTR_MASK 0x001fff00 44 45 #define XTENSA_MPU_PROBE_B 0x40000000 46 #define XTENSA_MPU_PROBE_V 0x80000000 47 48 #define XTENSA_MPU_SYSTEM_TYPE_DEVICE 0x0001 49 #define XTENSA_MPU_SYSTEM_TYPE_NC 0x0002 50 #define XTENSA_MPU_SYSTEM_TYPE_C 0x0003 51 #define XTENSA_MPU_SYSTEM_TYPE_MASK 0x0003 52 53 #define XTENSA_MPU_TYPE_SYS_C 0x0010 54 #define XTENSA_MPU_TYPE_SYS_W 0x0020 55 #define XTENSA_MPU_TYPE_SYS_R 0x0040 56 #define XTENSA_MPU_TYPE_CPU_C 0x0100 57 #define XTENSA_MPU_TYPE_CPU_W 0x0200 58 #define XTENSA_MPU_TYPE_CPU_R 0x0400 59 #define XTENSA_MPU_TYPE_CPU_CACHE 0x0800 60 #define XTENSA_MPU_TYPE_B 0x1000 61 #define XTENSA_MPU_TYPE_INT 0x2000 62 HELPER(itlb_hit_test)63 void HELPER(itlb_hit_test)(CPUXtensaState *env, uint32_t vaddr) 64 { 65 /* 66 * Probe the memory; we don't care about the result but 67 * only the side-effects (ie any MMU or other exception) 68 */ 69 probe_access(env, vaddr, 1, MMU_INST_FETCH, 70 cpu_mmu_index(env_cpu(env), true), GETPC()); 71 } 72 HELPER(wsr_rasid)73 void HELPER(wsr_rasid)(CPUXtensaState *env, uint32_t v) 74 { 75 v = (v & 0xffffff00) | 0x1; 76 if (v != env->sregs[RASID]) { 77 env->sregs[RASID] = v; 78 tlb_flush(env_cpu(env)); 79 } 80 } 81 get_page_size(const CPUXtensaState * env,bool dtlb,uint32_t way)82 static uint32_t get_page_size(const CPUXtensaState *env, 83 bool dtlb, uint32_t way) 84 { 85 uint32_t tlbcfg = env->sregs[dtlb ? DTLBCFG : ITLBCFG]; 86 87 switch (way) { 88 case 4: 89 return (tlbcfg >> 16) & 0x3; 90 91 case 5: 92 return (tlbcfg >> 20) & 0x1; 93 94 case 6: 95 return (tlbcfg >> 24) & 0x1; 96 97 default: 98 return 0; 99 } 100 } 101 102 /*! 103 * Get bit mask for the virtual address bits translated by the TLB way 104 */ xtensa_tlb_get_addr_mask(const CPUXtensaState * env,bool dtlb,uint32_t way)105 static uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env, 106 bool dtlb, uint32_t way) 107 { 108 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) { 109 bool varway56 = dtlb ? 110 env->config->dtlb.varway56 : 111 env->config->itlb.varway56; 112 113 switch (way) { 114 case 4: 115 return 0xfff00000 << get_page_size(env, dtlb, way) * 2; 116 117 case 5: 118 if (varway56) { 119 return 0xf8000000 << get_page_size(env, dtlb, way); 120 } else { 121 return 0xf8000000; 122 } 123 124 case 6: 125 if (varway56) { 126 return 0xf0000000 << (1 - get_page_size(env, dtlb, way)); 127 } else { 128 return 0xf0000000; 129 } 130 131 default: 132 return 0xfffff000; 133 } 134 } else { 135 return REGION_PAGE_MASK; 136 } 137 } 138 139 /*! 140 * Get bit mask for the 'VPN without index' field. 141 * See ISA, 4.6.5.6, data format for RxTLB0 142 */ get_vpn_mask(const CPUXtensaState * env,bool dtlb,uint32_t way)143 static uint32_t get_vpn_mask(const CPUXtensaState *env, bool dtlb, uint32_t way) 144 { 145 if (way < 4) { 146 bool is32 = (dtlb ? 147 env->config->dtlb.nrefillentries : 148 env->config->itlb.nrefillentries) == 32; 149 return is32 ? 0xffff8000 : 0xffffc000; 150 } else if (way == 4) { 151 return xtensa_tlb_get_addr_mask(env, dtlb, way) << 2; 152 } else if (way <= 6) { 153 uint32_t mask = xtensa_tlb_get_addr_mask(env, dtlb, way); 154 bool varway56 = dtlb ? 155 env->config->dtlb.varway56 : 156 env->config->itlb.varway56; 157 158 if (varway56) { 159 return mask << (way == 5 ? 2 : 3); 160 } else { 161 return mask << 1; 162 } 163 } else { 164 return 0xfffff000; 165 } 166 } 167 168 /*! 169 * Split virtual address into VPN (with index) and entry index 170 * for the given TLB way 171 */ split_tlb_entry_spec_way(const CPUXtensaState * env,uint32_t v,bool dtlb,uint32_t * vpn,uint32_t wi,uint32_t * ei)172 static void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, 173 bool dtlb, uint32_t *vpn, 174 uint32_t wi, uint32_t *ei) 175 { 176 bool varway56 = dtlb ? 177 env->config->dtlb.varway56 : 178 env->config->itlb.varway56; 179 180 if (!dtlb) { 181 wi &= 7; 182 } 183 184 if (wi < 4) { 185 bool is32 = (dtlb ? 186 env->config->dtlb.nrefillentries : 187 env->config->itlb.nrefillentries) == 32; 188 *ei = (v >> 12) & (is32 ? 0x7 : 0x3); 189 } else { 190 switch (wi) { 191 case 4: 192 { 193 uint32_t eibase = 20 + get_page_size(env, dtlb, wi) * 2; 194 *ei = (v >> eibase) & 0x3; 195 } 196 break; 197 198 case 5: 199 if (varway56) { 200 uint32_t eibase = 27 + get_page_size(env, dtlb, wi); 201 *ei = (v >> eibase) & 0x3; 202 } else { 203 *ei = (v >> 27) & 0x1; 204 } 205 break; 206 207 case 6: 208 if (varway56) { 209 uint32_t eibase = 29 - get_page_size(env, dtlb, wi); 210 *ei = (v >> eibase) & 0x7; 211 } else { 212 *ei = (v >> 28) & 0x1; 213 } 214 break; 215 216 default: 217 *ei = 0; 218 break; 219 } 220 } 221 *vpn = v & xtensa_tlb_get_addr_mask(env, dtlb, wi); 222 } 223 224 /*! 225 * Split TLB address into TLB way, entry index and VPN (with index). 226 * See ISA, 4.6.5.5 - 4.6.5.8 for the TLB addressing format 227 */ split_tlb_entry_spec(CPUXtensaState * env,uint32_t v,bool dtlb,uint32_t * vpn,uint32_t * wi,uint32_t * ei)228 static bool split_tlb_entry_spec(CPUXtensaState *env, uint32_t v, bool dtlb, 229 uint32_t *vpn, uint32_t *wi, uint32_t *ei) 230 { 231 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) { 232 *wi = v & (dtlb ? 0xf : 0x7); 233 if (*wi < (dtlb ? env->config->dtlb.nways : env->config->itlb.nways)) { 234 split_tlb_entry_spec_way(env, v, dtlb, vpn, *wi, ei); 235 return true; 236 } else { 237 return false; 238 } 239 } else { 240 *vpn = v & REGION_PAGE_MASK; 241 *wi = 0; 242 *ei = (v >> 29) & 0x7; 243 return true; 244 } 245 } 246 xtensa_tlb_get_entry(CPUXtensaState * env,bool dtlb,unsigned wi,unsigned ei)247 static xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env, bool dtlb, 248 unsigned wi, unsigned ei) 249 { 250 const xtensa_tlb *tlb = dtlb ? &env->config->dtlb : &env->config->itlb; 251 252 assert(wi < tlb->nways && ei < tlb->way_size[wi]); 253 return dtlb ? 254 env->dtlb[wi] + ei : 255 env->itlb[wi] + ei; 256 } 257 get_tlb_entry(CPUXtensaState * env,uint32_t v,bool dtlb,uint32_t * pwi)258 static xtensa_tlb_entry *get_tlb_entry(CPUXtensaState *env, 259 uint32_t v, bool dtlb, uint32_t *pwi) 260 { 261 uint32_t vpn; 262 uint32_t wi; 263 uint32_t ei; 264 265 if (split_tlb_entry_spec(env, v, dtlb, &vpn, &wi, &ei)) { 266 if (pwi) { 267 *pwi = wi; 268 } 269 return xtensa_tlb_get_entry(env, dtlb, wi, ei); 270 } else { 271 return NULL; 272 } 273 } 274 xtensa_tlb_set_entry_mmu(const CPUXtensaState * env,xtensa_tlb_entry * entry,bool dtlb,unsigned wi,unsigned ei,uint32_t vpn,uint32_t pte)275 static void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env, 276 xtensa_tlb_entry *entry, bool dtlb, 277 unsigned wi, unsigned ei, uint32_t vpn, 278 uint32_t pte) 279 { 280 entry->vaddr = vpn; 281 entry->paddr = pte & xtensa_tlb_get_addr_mask(env, dtlb, wi); 282 entry->asid = (env->sregs[RASID] >> ((pte >> 1) & 0x18)) & 0xff; 283 entry->attr = pte & 0xf; 284 } 285 xtensa_tlb_set_entry(CPUXtensaState * env,bool dtlb,unsigned wi,unsigned ei,uint32_t vpn,uint32_t pte)286 static void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb, 287 unsigned wi, unsigned ei, 288 uint32_t vpn, uint32_t pte) 289 { 290 CPUState *cs = env_cpu(env); 291 xtensa_tlb_entry *entry = xtensa_tlb_get_entry(env, dtlb, wi, ei); 292 293 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) { 294 if (entry->variable) { 295 if (entry->asid) { 296 tlb_flush_page(cs, entry->vaddr); 297 } 298 xtensa_tlb_set_entry_mmu(env, entry, dtlb, wi, ei, vpn, pte); 299 tlb_flush_page(cs, entry->vaddr); 300 } else { 301 qemu_log_mask(LOG_GUEST_ERROR, 302 "%s %d, %d, %d trying to set immutable entry\n", 303 __func__, dtlb, wi, ei); 304 } 305 } else { 306 tlb_flush_page(cs, entry->vaddr); 307 if (xtensa_option_enabled(env->config, 308 XTENSA_OPTION_REGION_TRANSLATION)) { 309 entry->paddr = pte & REGION_PAGE_MASK; 310 } 311 entry->attr = pte & 0xf; 312 } 313 } 314 xtensa_cpu_get_phys_page_debug(CPUState * cs,vaddr addr)315 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) 316 { 317 XtensaCPU *cpu = XTENSA_CPU(cs); 318 uint32_t paddr; 319 uint32_t page_size; 320 unsigned access; 321 322 if (xtensa_get_physical_addr(&cpu->env, false, addr, 0, 0, 323 &paddr, &page_size, &access) == 0) { 324 return paddr; 325 } 326 if (xtensa_get_physical_addr(&cpu->env, false, addr, 2, 0, 327 &paddr, &page_size, &access) == 0) { 328 return paddr; 329 } 330 return ~0; 331 } 332 reset_tlb_mmu_all_ways(CPUXtensaState * env,const xtensa_tlb * tlb,xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE])333 static void reset_tlb_mmu_all_ways(CPUXtensaState *env, 334 const xtensa_tlb *tlb, 335 xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE]) 336 { 337 unsigned wi, ei; 338 339 for (wi = 0; wi < tlb->nways; ++wi) { 340 for (ei = 0; ei < tlb->way_size[wi]; ++ei) { 341 entry[wi][ei].asid = 0; 342 entry[wi][ei].variable = true; 343 } 344 } 345 } 346 reset_tlb_mmu_ways56(CPUXtensaState * env,const xtensa_tlb * tlb,xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE])347 static void reset_tlb_mmu_ways56(CPUXtensaState *env, 348 const xtensa_tlb *tlb, 349 xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE]) 350 { 351 if (!tlb->varway56) { 352 static const xtensa_tlb_entry way5[] = { 353 { 354 .vaddr = 0xd0000000, 355 .paddr = 0, 356 .asid = 1, 357 .attr = 7, 358 .variable = false, 359 }, { 360 .vaddr = 0xd8000000, 361 .paddr = 0, 362 .asid = 1, 363 .attr = 3, 364 .variable = false, 365 } 366 }; 367 static const xtensa_tlb_entry way6[] = { 368 { 369 .vaddr = 0xe0000000, 370 .paddr = 0xf0000000, 371 .asid = 1, 372 .attr = 7, 373 .variable = false, 374 }, { 375 .vaddr = 0xf0000000, 376 .paddr = 0xf0000000, 377 .asid = 1, 378 .attr = 3, 379 .variable = false, 380 } 381 }; 382 memcpy(entry[5], way5, sizeof(way5)); 383 memcpy(entry[6], way6, sizeof(way6)); 384 } else { 385 uint32_t ei; 386 for (ei = 0; ei < 8; ++ei) { 387 entry[6][ei].vaddr = ei << 29; 388 entry[6][ei].paddr = ei << 29; 389 entry[6][ei].asid = 1; 390 entry[6][ei].attr = 3; 391 } 392 } 393 } 394 reset_tlb_region_way0(CPUXtensaState * env,xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE])395 static void reset_tlb_region_way0(CPUXtensaState *env, 396 xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE]) 397 { 398 unsigned ei; 399 400 for (ei = 0; ei < 8; ++ei) { 401 entry[0][ei].vaddr = ei << 29; 402 entry[0][ei].paddr = ei << 29; 403 entry[0][ei].asid = 1; 404 entry[0][ei].attr = 2; 405 entry[0][ei].variable = true; 406 } 407 } 408 reset_mmu(CPUXtensaState * env)409 void reset_mmu(CPUXtensaState *env) 410 { 411 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) { 412 env->sregs[RASID] = 0x04030201; 413 env->sregs[ITLBCFG] = 0; 414 env->sregs[DTLBCFG] = 0; 415 env->autorefill_idx = 0; 416 reset_tlb_mmu_all_ways(env, &env->config->itlb, env->itlb); 417 reset_tlb_mmu_all_ways(env, &env->config->dtlb, env->dtlb); 418 reset_tlb_mmu_ways56(env, &env->config->itlb, env->itlb); 419 reset_tlb_mmu_ways56(env, &env->config->dtlb, env->dtlb); 420 } else if (xtensa_option_enabled(env->config, XTENSA_OPTION_MPU)) { 421 unsigned i; 422 423 env->sregs[MPUENB] = 0; 424 env->sregs[MPUCFG] = env->config->n_mpu_fg_segments; 425 env->sregs[CACHEADRDIS] = 0; 426 assert(env->config->n_mpu_bg_segments > 0 && 427 env->config->mpu_bg[0].vaddr == 0); 428 for (i = 1; i < env->config->n_mpu_bg_segments; ++i) { 429 assert(env->config->mpu_bg[i].vaddr >= 430 env->config->mpu_bg[i - 1].vaddr); 431 } 432 } else { 433 env->sregs[CACHEATTR] = 0x22222222; 434 reset_tlb_region_way0(env, env->itlb); 435 reset_tlb_region_way0(env, env->dtlb); 436 } 437 } 438 get_ring(const CPUXtensaState * env,uint8_t asid)439 static unsigned get_ring(const CPUXtensaState *env, uint8_t asid) 440 { 441 unsigned i; 442 for (i = 0; i < 4; ++i) { 443 if (((env->sregs[RASID] >> i * 8) & 0xff) == asid) { 444 return i; 445 } 446 } 447 return 0xff; 448 } 449 450 /*! 451 * Lookup xtensa TLB for the given virtual address. 452 * See ISA, 4.6.2.2 453 * 454 * \param pwi: [out] way index 455 * \param pei: [out] entry index 456 * \param pring: [out] access ring 457 * \return 0 if ok, exception cause code otherwise 458 */ xtensa_tlb_lookup(const CPUXtensaState * env,uint32_t addr,bool dtlb,uint32_t * pwi,uint32_t * pei,uint8_t * pring)459 static int xtensa_tlb_lookup(const CPUXtensaState *env, 460 uint32_t addr, bool dtlb, 461 uint32_t *pwi, uint32_t *pei, uint8_t *pring) 462 { 463 const xtensa_tlb *tlb = dtlb ? 464 &env->config->dtlb : &env->config->itlb; 465 const xtensa_tlb_entry (*entry)[MAX_TLB_WAY_SIZE] = dtlb ? 466 env->dtlb : env->itlb; 467 468 int nhits = 0; 469 unsigned wi; 470 471 for (wi = 0; wi < tlb->nways; ++wi) { 472 uint32_t vpn; 473 uint32_t ei; 474 split_tlb_entry_spec_way(env, addr, dtlb, &vpn, wi, &ei); 475 if (entry[wi][ei].vaddr == vpn && entry[wi][ei].asid) { 476 unsigned ring = get_ring(env, entry[wi][ei].asid); 477 if (ring < 4) { 478 if (++nhits > 1) { 479 return dtlb ? 480 LOAD_STORE_TLB_MULTI_HIT_CAUSE : 481 INST_TLB_MULTI_HIT_CAUSE; 482 } 483 *pwi = wi; 484 *pei = ei; 485 *pring = ring; 486 } 487 } 488 } 489 return nhits ? 0 : 490 (dtlb ? LOAD_STORE_TLB_MISS_CAUSE : INST_TLB_MISS_CAUSE); 491 } 492 HELPER(rtlb0)493 uint32_t HELPER(rtlb0)(CPUXtensaState *env, uint32_t v, uint32_t dtlb) 494 { 495 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) { 496 uint32_t wi; 497 const xtensa_tlb_entry *entry = get_tlb_entry(env, v, dtlb, &wi); 498 499 if (entry) { 500 return (entry->vaddr & get_vpn_mask(env, dtlb, wi)) | entry->asid; 501 } else { 502 return 0; 503 } 504 } else { 505 return v & REGION_PAGE_MASK; 506 } 507 } 508 HELPER(rtlb1)509 uint32_t HELPER(rtlb1)(CPUXtensaState *env, uint32_t v, uint32_t dtlb) 510 { 511 const xtensa_tlb_entry *entry = get_tlb_entry(env, v, dtlb, NULL); 512 513 if (entry) { 514 return entry->paddr | entry->attr; 515 } else { 516 return 0; 517 } 518 } 519 HELPER(itlb)520 void HELPER(itlb)(CPUXtensaState *env, uint32_t v, uint32_t dtlb) 521 { 522 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) { 523 uint32_t wi; 524 xtensa_tlb_entry *entry = get_tlb_entry(env, v, dtlb, &wi); 525 if (entry && entry->variable && entry->asid) { 526 tlb_flush_page(env_cpu(env), entry->vaddr); 527 entry->asid = 0; 528 } 529 } 530 } 531 HELPER(ptlb)532 uint32_t HELPER(ptlb)(CPUXtensaState *env, uint32_t v, uint32_t dtlb) 533 { 534 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) { 535 uint32_t wi; 536 uint32_t ei; 537 uint8_t ring; 538 int res = xtensa_tlb_lookup(env, v, dtlb, &wi, &ei, &ring); 539 540 switch (res) { 541 case 0: 542 if (ring >= xtensa_get_ring(env)) { 543 return (v & 0xfffff000) | wi | (dtlb ? 0x10 : 0x8); 544 } 545 break; 546 547 case INST_TLB_MULTI_HIT_CAUSE: 548 case LOAD_STORE_TLB_MULTI_HIT_CAUSE: 549 HELPER(exception_cause_vaddr)(env, env->pc, res, v); 550 break; 551 } 552 return 0; 553 } else { 554 return (v & REGION_PAGE_MASK) | 0x1; 555 } 556 } 557 HELPER(wtlb)558 void HELPER(wtlb)(CPUXtensaState *env, uint32_t p, uint32_t v, uint32_t dtlb) 559 { 560 uint32_t vpn; 561 uint32_t wi; 562 uint32_t ei; 563 if (split_tlb_entry_spec(env, v, dtlb, &vpn, &wi, &ei)) { 564 xtensa_tlb_set_entry(env, dtlb, wi, ei, vpn, p); 565 } 566 } 567 568 /*! 569 * Convert MMU ATTR to PAGE_{READ,WRITE,EXEC} mask. 570 * See ISA, 4.6.5.10 571 */ mmu_attr_to_access(uint32_t attr)572 static unsigned mmu_attr_to_access(uint32_t attr) 573 { 574 unsigned access = 0; 575 576 if (attr < 12) { 577 access |= PAGE_READ; 578 if (attr & 0x1) { 579 access |= PAGE_EXEC; 580 } 581 if (attr & 0x2) { 582 access |= PAGE_WRITE; 583 } 584 585 switch (attr & 0xc) { 586 case 0: 587 access |= PAGE_CACHE_BYPASS; 588 break; 589 590 case 4: 591 access |= PAGE_CACHE_WB; 592 break; 593 594 case 8: 595 access |= PAGE_CACHE_WT; 596 break; 597 } 598 } else if (attr == 13) { 599 access |= PAGE_READ | PAGE_WRITE | PAGE_CACHE_ISOLATE; 600 } 601 return access; 602 } 603 604 /*! 605 * Convert region protection ATTR to PAGE_{READ,WRITE,EXEC} mask. 606 * See ISA, 4.6.3.3 607 */ region_attr_to_access(uint32_t attr)608 static unsigned region_attr_to_access(uint32_t attr) 609 { 610 static const unsigned access[16] = { 611 [0] = PAGE_READ | PAGE_WRITE | PAGE_CACHE_WT, 612 [1] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WT, 613 [2] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_BYPASS, 614 [3] = PAGE_EXEC | PAGE_CACHE_WB, 615 [4] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WB, 616 [5] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WB, 617 [14] = PAGE_READ | PAGE_WRITE | PAGE_CACHE_ISOLATE, 618 }; 619 620 return access[attr & 0xf]; 621 } 622 623 /*! 624 * Convert cacheattr to PAGE_{READ,WRITE,EXEC} mask. 625 * See ISA, A.2.14 The Cache Attribute Register 626 */ cacheattr_attr_to_access(uint32_t attr)627 static unsigned cacheattr_attr_to_access(uint32_t attr) 628 { 629 static const unsigned access[16] = { 630 [0] = PAGE_READ | PAGE_WRITE | PAGE_CACHE_WT, 631 [1] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WT, 632 [2] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_BYPASS, 633 [3] = PAGE_EXEC | PAGE_CACHE_WB, 634 [4] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WB, 635 [14] = PAGE_READ | PAGE_WRITE | PAGE_CACHE_ISOLATE, 636 }; 637 638 return access[attr & 0xf]; 639 } 640 641 struct attr_pattern { 642 uint32_t mask; 643 uint32_t value; 644 }; 645 attr_pattern_match(uint32_t attr,const struct attr_pattern * pattern,size_t n)646 static int attr_pattern_match(uint32_t attr, 647 const struct attr_pattern *pattern, 648 size_t n) 649 { 650 size_t i; 651 652 for (i = 0; i < n; ++i) { 653 if ((attr & pattern[i].mask) == pattern[i].value) { 654 return 1; 655 } 656 } 657 return 0; 658 } 659 mpu_attr_to_cpu_cache(uint32_t attr)660 static unsigned mpu_attr_to_cpu_cache(uint32_t attr) 661 { 662 static const struct attr_pattern cpu_c[] = { 663 { .mask = 0x18f, .value = 0x089 }, 664 { .mask = 0x188, .value = 0x080 }, 665 { .mask = 0x180, .value = 0x180 }, 666 }; 667 668 unsigned type = 0; 669 670 if (attr_pattern_match(attr, cpu_c, ARRAY_SIZE(cpu_c))) { 671 type |= XTENSA_MPU_TYPE_CPU_CACHE; 672 if (attr & 0x10) { 673 type |= XTENSA_MPU_TYPE_CPU_C; 674 } 675 if (attr & 0x20) { 676 type |= XTENSA_MPU_TYPE_CPU_W; 677 } 678 if (attr & 0x40) { 679 type |= XTENSA_MPU_TYPE_CPU_R; 680 } 681 } 682 return type; 683 } 684 mpu_attr_to_type(uint32_t attr)685 static unsigned mpu_attr_to_type(uint32_t attr) 686 { 687 static const struct attr_pattern device_type[] = { 688 { .mask = 0x1f6, .value = 0x000 }, 689 { .mask = 0x1f6, .value = 0x006 }, 690 }; 691 static const struct attr_pattern sys_nc_type[] = { 692 { .mask = 0x1fe, .value = 0x018 }, 693 { .mask = 0x1fe, .value = 0x01e }, 694 { .mask = 0x18f, .value = 0x089 }, 695 }; 696 static const struct attr_pattern sys_c_type[] = { 697 { .mask = 0x1f8, .value = 0x010 }, 698 { .mask = 0x188, .value = 0x080 }, 699 { .mask = 0x1f0, .value = 0x030 }, 700 { .mask = 0x180, .value = 0x180 }, 701 }; 702 static const struct attr_pattern b[] = { 703 { .mask = 0x1f7, .value = 0x001 }, 704 { .mask = 0x1f7, .value = 0x007 }, 705 { .mask = 0x1ff, .value = 0x019 }, 706 { .mask = 0x1ff, .value = 0x01f }, 707 }; 708 709 unsigned type = 0; 710 711 attr = (attr & XTENSA_MPU_MEM_TYPE_MASK) >> XTENSA_MPU_MEM_TYPE_SHIFT; 712 if (attr_pattern_match(attr, device_type, ARRAY_SIZE(device_type))) { 713 type |= XTENSA_MPU_SYSTEM_TYPE_DEVICE; 714 if (attr & 0x80) { 715 type |= XTENSA_MPU_TYPE_INT; 716 } 717 } 718 if (attr_pattern_match(attr, sys_nc_type, ARRAY_SIZE(sys_nc_type))) { 719 type |= XTENSA_MPU_SYSTEM_TYPE_NC; 720 } 721 if (attr_pattern_match(attr, sys_c_type, ARRAY_SIZE(sys_c_type))) { 722 type |= XTENSA_MPU_SYSTEM_TYPE_C; 723 if (attr & 0x1) { 724 type |= XTENSA_MPU_TYPE_SYS_C; 725 } 726 if (attr & 0x2) { 727 type |= XTENSA_MPU_TYPE_SYS_W; 728 } 729 if (attr & 0x4) { 730 type |= XTENSA_MPU_TYPE_SYS_R; 731 } 732 } 733 if (attr_pattern_match(attr, b, ARRAY_SIZE(b))) { 734 type |= XTENSA_MPU_TYPE_B; 735 } 736 type |= mpu_attr_to_cpu_cache(attr); 737 738 return type; 739 } 740 mpu_attr_to_access(uint32_t attr,unsigned ring)741 static unsigned mpu_attr_to_access(uint32_t attr, unsigned ring) 742 { 743 static const unsigned access[2][16] = { 744 [0] = { 745 [4] = PAGE_READ, 746 [5] = PAGE_READ | PAGE_EXEC, 747 [6] = PAGE_READ | PAGE_WRITE, 748 [7] = PAGE_READ | PAGE_WRITE | PAGE_EXEC, 749 [8] = PAGE_WRITE, 750 [9] = PAGE_READ | PAGE_WRITE, 751 [10] = PAGE_READ | PAGE_WRITE, 752 [11] = PAGE_READ | PAGE_WRITE | PAGE_EXEC, 753 [12] = PAGE_READ, 754 [13] = PAGE_READ | PAGE_EXEC, 755 [14] = PAGE_READ | PAGE_WRITE, 756 [15] = PAGE_READ | PAGE_WRITE | PAGE_EXEC, 757 }, 758 [1] = { 759 [8] = PAGE_WRITE, 760 [9] = PAGE_READ | PAGE_WRITE | PAGE_EXEC, 761 [10] = PAGE_READ, 762 [11] = PAGE_READ | PAGE_EXEC, 763 [12] = PAGE_READ, 764 [13] = PAGE_READ | PAGE_EXEC, 765 [14] = PAGE_READ | PAGE_WRITE, 766 [15] = PAGE_READ | PAGE_WRITE | PAGE_EXEC, 767 }, 768 }; 769 unsigned rv; 770 unsigned type; 771 772 type = mpu_attr_to_cpu_cache(attr); 773 rv = access[ring != 0][(attr & XTENSA_MPU_ACC_RIGHTS_MASK) >> 774 XTENSA_MPU_ACC_RIGHTS_SHIFT]; 775 776 if (type & XTENSA_MPU_TYPE_CPU_CACHE) { 777 rv |= (type & XTENSA_MPU_TYPE_CPU_C) ? PAGE_CACHE_WB : PAGE_CACHE_WT; 778 } else { 779 rv |= PAGE_CACHE_BYPASS; 780 } 781 return rv; 782 } 783 is_access_granted(unsigned access,int is_write)784 static bool is_access_granted(unsigned access, int is_write) 785 { 786 switch (is_write) { 787 case 0: 788 return access & PAGE_READ; 789 790 case 1: 791 return access & PAGE_WRITE; 792 793 case 2: 794 return access & PAGE_EXEC; 795 796 default: 797 return 0; 798 } 799 } 800 801 static bool get_pte(CPUXtensaState *env, uint32_t vaddr, uint32_t *pte); 802 get_physical_addr_mmu(CPUXtensaState * env,bool update_tlb,uint32_t vaddr,int is_write,int mmu_idx,uint32_t * paddr,uint32_t * page_size,unsigned * access,bool may_lookup_pt)803 static int get_physical_addr_mmu(CPUXtensaState *env, bool update_tlb, 804 uint32_t vaddr, int is_write, int mmu_idx, 805 uint32_t *paddr, uint32_t *page_size, 806 unsigned *access, bool may_lookup_pt) 807 { 808 bool dtlb = is_write != 2; 809 uint32_t wi; 810 uint32_t ei; 811 uint8_t ring; 812 uint32_t vpn; 813 uint32_t pte; 814 const xtensa_tlb_entry *entry = NULL; 815 xtensa_tlb_entry tmp_entry; 816 int ret = xtensa_tlb_lookup(env, vaddr, dtlb, &wi, &ei, &ring); 817 818 if ((ret == INST_TLB_MISS_CAUSE || ret == LOAD_STORE_TLB_MISS_CAUSE) && 819 may_lookup_pt && get_pte(env, vaddr, &pte)) { 820 ring = (pte >> 4) & 0x3; 821 wi = 0; 822 split_tlb_entry_spec_way(env, vaddr, dtlb, &vpn, wi, &ei); 823 824 if (update_tlb) { 825 wi = ++env->autorefill_idx & 0x3; 826 xtensa_tlb_set_entry(env, dtlb, wi, ei, vpn, pte); 827 env->sregs[EXCVADDR] = vaddr; 828 qemu_log_mask(CPU_LOG_MMU, "%s: autorefill(%08x): %08x -> %08x\n", 829 __func__, vaddr, vpn, pte); 830 } else { 831 xtensa_tlb_set_entry_mmu(env, &tmp_entry, dtlb, wi, ei, vpn, pte); 832 entry = &tmp_entry; 833 } 834 ret = 0; 835 } 836 if (ret != 0) { 837 return ret; 838 } 839 840 if (entry == NULL) { 841 entry = xtensa_tlb_get_entry(env, dtlb, wi, ei); 842 } 843 844 if (ring < mmu_idx) { 845 return dtlb ? 846 LOAD_STORE_PRIVILEGE_CAUSE : 847 INST_FETCH_PRIVILEGE_CAUSE; 848 } 849 850 *access = mmu_attr_to_access(entry->attr) & 851 ~(dtlb ? PAGE_EXEC : PAGE_READ | PAGE_WRITE); 852 if (!is_access_granted(*access, is_write)) { 853 return dtlb ? 854 (is_write ? 855 STORE_PROHIBITED_CAUSE : 856 LOAD_PROHIBITED_CAUSE) : 857 INST_FETCH_PROHIBITED_CAUSE; 858 } 859 860 *paddr = entry->paddr | (vaddr & ~xtensa_tlb_get_addr_mask(env, dtlb, wi)); 861 *page_size = ~xtensa_tlb_get_addr_mask(env, dtlb, wi) + 1; 862 863 return 0; 864 } 865 get_pte(CPUXtensaState * env,uint32_t vaddr,uint32_t * pte)866 static bool get_pte(CPUXtensaState *env, uint32_t vaddr, uint32_t *pte) 867 { 868 CPUState *cs = env_cpu(env); 869 uint32_t paddr; 870 uint32_t page_size; 871 unsigned access; 872 uint32_t pt_vaddr = 873 (env->sregs[PTEVADDR] | (vaddr >> 10)) & 0xfffffffc; 874 int ret = get_physical_addr_mmu(env, false, pt_vaddr, 0, 0, 875 &paddr, &page_size, &access, false); 876 877 if (ret == 0) { 878 qemu_log_mask(CPU_LOG_MMU, 879 "%s: autorefill(%08x): PTE va = %08x, pa = %08x\n", 880 __func__, vaddr, pt_vaddr, paddr); 881 } else { 882 qemu_log_mask(CPU_LOG_MMU, 883 "%s: autorefill(%08x): PTE va = %08x, failed (%d)\n", 884 __func__, vaddr, pt_vaddr, ret); 885 } 886 887 if (ret == 0) { 888 MemTxResult result; 889 890 *pte = address_space_ldl(cs->as, paddr, MEMTXATTRS_UNSPECIFIED, 891 &result); 892 if (result != MEMTX_OK) { 893 qemu_log_mask(CPU_LOG_MMU, 894 "%s: couldn't load PTE: transaction failed (%u)\n", 895 __func__, (unsigned)result); 896 ret = 1; 897 } 898 } 899 return ret == 0; 900 } 901 get_physical_addr_region(CPUXtensaState * env,uint32_t vaddr,int is_write,int mmu_idx,uint32_t * paddr,uint32_t * page_size,unsigned * access)902 static int get_physical_addr_region(CPUXtensaState *env, 903 uint32_t vaddr, int is_write, int mmu_idx, 904 uint32_t *paddr, uint32_t *page_size, 905 unsigned *access) 906 { 907 bool dtlb = is_write != 2; 908 uint32_t wi = 0; 909 uint32_t ei = (vaddr >> 29) & 0x7; 910 const xtensa_tlb_entry *entry = 911 xtensa_tlb_get_entry(env, dtlb, wi, ei); 912 913 *access = region_attr_to_access(entry->attr); 914 if (!is_access_granted(*access, is_write)) { 915 return dtlb ? 916 (is_write ? 917 STORE_PROHIBITED_CAUSE : 918 LOAD_PROHIBITED_CAUSE) : 919 INST_FETCH_PROHIBITED_CAUSE; 920 } 921 922 *paddr = entry->paddr | (vaddr & ~REGION_PAGE_MASK); 923 *page_size = ~REGION_PAGE_MASK + 1; 924 925 return 0; 926 } 927 xtensa_mpu_lookup(const xtensa_mpu_entry * entry,unsigned n,uint32_t vaddr,unsigned * segment)928 static int xtensa_mpu_lookup(const xtensa_mpu_entry *entry, unsigned n, 929 uint32_t vaddr, unsigned *segment) 930 { 931 unsigned nhits = 0; 932 unsigned i; 933 934 for (i = 0; i < n; ++i) { 935 if (vaddr >= entry[i].vaddr && 936 (i == n - 1 || vaddr < entry[i + 1].vaddr)) { 937 if (nhits++) { 938 break; 939 } 940 *segment = i; 941 } 942 } 943 return nhits; 944 } 945 HELPER(wsr_mpuenb)946 void HELPER(wsr_mpuenb)(CPUXtensaState *env, uint32_t v) 947 { 948 v &= (2u << (env->config->n_mpu_fg_segments - 1)) - 1; 949 950 if (v != env->sregs[MPUENB]) { 951 env->sregs[MPUENB] = v; 952 tlb_flush(env_cpu(env)); 953 } 954 } 955 HELPER(wptlb)956 void HELPER(wptlb)(CPUXtensaState *env, uint32_t p, uint32_t v) 957 { 958 unsigned segment = p & XTENSA_MPU_SEGMENT_MASK; 959 960 if (segment < env->config->n_mpu_fg_segments) { 961 env->mpu_fg[segment].vaddr = v & -env->config->mpu_align; 962 env->mpu_fg[segment].attr = p & XTENSA_MPU_ATTR_MASK; 963 env->sregs[MPUENB] = deposit32(env->sregs[MPUENB], segment, 1, v); 964 tlb_flush(env_cpu(env)); 965 } 966 } 967 HELPER(rptlb0)968 uint32_t HELPER(rptlb0)(CPUXtensaState *env, uint32_t s) 969 { 970 unsigned segment = s & XTENSA_MPU_SEGMENT_MASK; 971 972 if (segment < env->config->n_mpu_fg_segments) { 973 return env->mpu_fg[segment].vaddr | 974 extract32(env->sregs[MPUENB], segment, 1); 975 } else { 976 return 0; 977 } 978 } 979 HELPER(rptlb1)980 uint32_t HELPER(rptlb1)(CPUXtensaState *env, uint32_t s) 981 { 982 unsigned segment = s & XTENSA_MPU_SEGMENT_MASK; 983 984 if (segment < env->config->n_mpu_fg_segments) { 985 return env->mpu_fg[segment].attr; 986 } else { 987 return 0; 988 } 989 } 990 HELPER(pptlb)991 uint32_t HELPER(pptlb)(CPUXtensaState *env, uint32_t v) 992 { 993 unsigned nhits; 994 unsigned segment; 995 unsigned bg_segment; 996 997 nhits = xtensa_mpu_lookup(env->mpu_fg, env->config->n_mpu_fg_segments, 998 v, &segment); 999 if (nhits > 1) { 1000 HELPER(exception_cause_vaddr)(env, env->pc, 1001 LOAD_STORE_TLB_MULTI_HIT_CAUSE, v); 1002 } else if (nhits == 1 && (env->sregs[MPUENB] & (1u << segment))) { 1003 return env->mpu_fg[segment].attr | segment | XTENSA_MPU_PROBE_V; 1004 } else { 1005 xtensa_mpu_lookup(env->config->mpu_bg, 1006 env->config->n_mpu_bg_segments, 1007 v, &bg_segment); 1008 return env->config->mpu_bg[bg_segment].attr | XTENSA_MPU_PROBE_B; 1009 } 1010 } 1011 get_physical_addr_mpu(CPUXtensaState * env,uint32_t vaddr,int is_write,int mmu_idx,uint32_t * paddr,uint32_t * page_size,unsigned * access)1012 static int get_physical_addr_mpu(CPUXtensaState *env, 1013 uint32_t vaddr, int is_write, int mmu_idx, 1014 uint32_t *paddr, uint32_t *page_size, 1015 unsigned *access) 1016 { 1017 unsigned nhits; 1018 unsigned segment; 1019 uint32_t attr; 1020 1021 nhits = xtensa_mpu_lookup(env->mpu_fg, env->config->n_mpu_fg_segments, 1022 vaddr, &segment); 1023 if (nhits > 1) { 1024 return is_write < 2 ? 1025 LOAD_STORE_TLB_MULTI_HIT_CAUSE : 1026 INST_TLB_MULTI_HIT_CAUSE; 1027 } else if (nhits == 1 && (env->sregs[MPUENB] & (1u << segment))) { 1028 attr = env->mpu_fg[segment].attr; 1029 } else { 1030 xtensa_mpu_lookup(env->config->mpu_bg, 1031 env->config->n_mpu_bg_segments, 1032 vaddr, &segment); 1033 attr = env->config->mpu_bg[segment].attr; 1034 } 1035 1036 *access = mpu_attr_to_access(attr, mmu_idx); 1037 if (!is_access_granted(*access, is_write)) { 1038 return is_write < 2 ? 1039 (is_write ? 1040 STORE_PROHIBITED_CAUSE : 1041 LOAD_PROHIBITED_CAUSE) : 1042 INST_FETCH_PROHIBITED_CAUSE; 1043 } 1044 *paddr = vaddr; 1045 *page_size = env->config->mpu_align; 1046 return 0; 1047 } 1048 1049 /*! 1050 * Convert virtual address to physical addr. 1051 * MMU may issue pagewalk and change xtensa autorefill TLB way entry. 1052 * 1053 * \return 0 if ok, exception cause code otherwise 1054 */ xtensa_get_physical_addr(CPUXtensaState * env,bool update_tlb,uint32_t vaddr,int is_write,int mmu_idx,uint32_t * paddr,uint32_t * page_size,unsigned * access)1055 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb, 1056 uint32_t vaddr, int is_write, int mmu_idx, 1057 uint32_t *paddr, uint32_t *page_size, 1058 unsigned *access) 1059 { 1060 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) { 1061 return get_physical_addr_mmu(env, update_tlb, 1062 vaddr, is_write, mmu_idx, paddr, 1063 page_size, access, true); 1064 } else if (xtensa_option_bits_enabled(env->config, 1065 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_PROTECTION) | 1066 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_TRANSLATION))) { 1067 return get_physical_addr_region(env, vaddr, is_write, mmu_idx, 1068 paddr, page_size, access); 1069 } else if (xtensa_option_enabled(env->config, XTENSA_OPTION_MPU)) { 1070 return get_physical_addr_mpu(env, vaddr, is_write, mmu_idx, 1071 paddr, page_size, access); 1072 } else { 1073 *paddr = vaddr; 1074 *page_size = TARGET_PAGE_SIZE; 1075 *access = cacheattr_attr_to_access(env->sregs[CACHEATTR] >> 1076 ((vaddr & 0xe0000000) >> 27)); 1077 return 0; 1078 } 1079 } 1080 dump_tlb(CPUXtensaState * env,bool dtlb)1081 static void dump_tlb(CPUXtensaState *env, bool dtlb) 1082 { 1083 unsigned wi, ei; 1084 const xtensa_tlb *conf = 1085 dtlb ? &env->config->dtlb : &env->config->itlb; 1086 unsigned (*attr_to_access)(uint32_t) = 1087 xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) ? 1088 mmu_attr_to_access : region_attr_to_access; 1089 1090 for (wi = 0; wi < conf->nways; ++wi) { 1091 uint32_t sz = ~xtensa_tlb_get_addr_mask(env, dtlb, wi) + 1; 1092 const char *sz_text; 1093 bool print_header = true; 1094 1095 if (sz >= 0x100000) { 1096 sz /= MiB; 1097 sz_text = "MB"; 1098 } else { 1099 sz /= KiB; 1100 sz_text = "KB"; 1101 } 1102 1103 for (ei = 0; ei < conf->way_size[wi]; ++ei) { 1104 const xtensa_tlb_entry *entry = 1105 xtensa_tlb_get_entry(env, dtlb, wi, ei); 1106 1107 if (entry->asid) { 1108 static const char * const cache_text[8] = { 1109 [PAGE_CACHE_BYPASS >> PAGE_CACHE_SHIFT] = "Bypass", 1110 [PAGE_CACHE_WT >> PAGE_CACHE_SHIFT] = "WT", 1111 [PAGE_CACHE_WB >> PAGE_CACHE_SHIFT] = "WB", 1112 [PAGE_CACHE_ISOLATE >> PAGE_CACHE_SHIFT] = "Isolate", 1113 }; 1114 unsigned access = attr_to_access(entry->attr); 1115 unsigned cache_idx = (access & PAGE_CACHE_MASK) >> 1116 PAGE_CACHE_SHIFT; 1117 1118 if (print_header) { 1119 print_header = false; 1120 qemu_printf("Way %u (%d %s)\n", wi, sz, sz_text); 1121 qemu_printf("\tVaddr Paddr ASID Attr RWX Cache\n" 1122 "\t---------- ---------- ---- ---- --- -------\n"); 1123 } 1124 qemu_printf("\t0x%08x 0x%08x 0x%02x 0x%02x %c%c%c %s\n", 1125 entry->vaddr, 1126 entry->paddr, 1127 entry->asid, 1128 entry->attr, 1129 (access & PAGE_READ) ? 'R' : '-', 1130 (access & PAGE_WRITE) ? 'W' : '-', 1131 (access & PAGE_EXEC) ? 'X' : '-', 1132 cache_text[cache_idx] ? 1133 cache_text[cache_idx] : "Invalid"); 1134 } 1135 } 1136 } 1137 } 1138 dump_mpu(CPUXtensaState * env,const xtensa_mpu_entry * entry,unsigned n)1139 static void dump_mpu(CPUXtensaState *env, 1140 const xtensa_mpu_entry *entry, unsigned n) 1141 { 1142 unsigned i; 1143 1144 qemu_printf("\t%s Vaddr Attr Ring0 Ring1 System Type CPU cache\n" 1145 "\t%s ---------- ---------- ----- ----- ------------- ---------\n", 1146 env ? "En" : " ", 1147 env ? "--" : " "); 1148 1149 for (i = 0; i < n; ++i) { 1150 uint32_t attr = entry[i].attr; 1151 unsigned access0 = mpu_attr_to_access(attr, 0); 1152 unsigned access1 = mpu_attr_to_access(attr, 1); 1153 unsigned type = mpu_attr_to_type(attr); 1154 char cpu_cache = (type & XTENSA_MPU_TYPE_CPU_CACHE) ? '-' : ' '; 1155 1156 qemu_printf("\t %c 0x%08x 0x%08x %c%c%c %c%c%c ", 1157 env ? 1158 ((env->sregs[MPUENB] & (1u << i)) ? '+' : '-') : ' ', 1159 entry[i].vaddr, attr, 1160 (access0 & PAGE_READ) ? 'R' : '-', 1161 (access0 & PAGE_WRITE) ? 'W' : '-', 1162 (access0 & PAGE_EXEC) ? 'X' : '-', 1163 (access1 & PAGE_READ) ? 'R' : '-', 1164 (access1 & PAGE_WRITE) ? 'W' : '-', 1165 (access1 & PAGE_EXEC) ? 'X' : '-'); 1166 1167 switch (type & XTENSA_MPU_SYSTEM_TYPE_MASK) { 1168 case XTENSA_MPU_SYSTEM_TYPE_DEVICE: 1169 qemu_printf("Device %cB %3s\n", 1170 (type & XTENSA_MPU_TYPE_B) ? ' ' : 'n', 1171 (type & XTENSA_MPU_TYPE_INT) ? "int" : ""); 1172 break; 1173 case XTENSA_MPU_SYSTEM_TYPE_NC: 1174 qemu_printf("Sys NC %cB %c%c%c\n", 1175 (type & XTENSA_MPU_TYPE_B) ? ' ' : 'n', 1176 (type & XTENSA_MPU_TYPE_CPU_R) ? 'r' : cpu_cache, 1177 (type & XTENSA_MPU_TYPE_CPU_W) ? 'w' : cpu_cache, 1178 (type & XTENSA_MPU_TYPE_CPU_C) ? 'c' : cpu_cache); 1179 break; 1180 case XTENSA_MPU_SYSTEM_TYPE_C: 1181 qemu_printf("Sys C %c%c%c %c%c%c\n", 1182 (type & XTENSA_MPU_TYPE_SYS_R) ? 'R' : '-', 1183 (type & XTENSA_MPU_TYPE_SYS_W) ? 'W' : '-', 1184 (type & XTENSA_MPU_TYPE_SYS_C) ? 'C' : '-', 1185 (type & XTENSA_MPU_TYPE_CPU_R) ? 'r' : cpu_cache, 1186 (type & XTENSA_MPU_TYPE_CPU_W) ? 'w' : cpu_cache, 1187 (type & XTENSA_MPU_TYPE_CPU_C) ? 'c' : cpu_cache); 1188 break; 1189 default: 1190 qemu_printf("Unknown\n"); 1191 break; 1192 } 1193 } 1194 } 1195 dump_mmu(CPUXtensaState * env)1196 void dump_mmu(CPUXtensaState *env) 1197 { 1198 if (xtensa_option_bits_enabled(env->config, 1199 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_PROTECTION) | 1200 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_TRANSLATION) | 1201 XTENSA_OPTION_BIT(XTENSA_OPTION_MMU))) { 1202 1203 qemu_printf("ITLB:\n"); 1204 dump_tlb(env, false); 1205 qemu_printf("\nDTLB:\n"); 1206 dump_tlb(env, true); 1207 } else if (xtensa_option_enabled(env->config, XTENSA_OPTION_MPU)) { 1208 qemu_printf("Foreground map:\n"); 1209 dump_mpu(env, env->mpu_fg, env->config->n_mpu_fg_segments); 1210 qemu_printf("\nBackground map:\n"); 1211 dump_mpu(NULL, env->config->mpu_bg, env->config->n_mpu_bg_segments); 1212 } else { 1213 qemu_printf("No TLB for this CPU core\n"); 1214 } 1215 } 1216