target/xtensa/mmu_helper.c

   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/main-loop.h"
  31 #include "qemu/qemu-print.h"
  32 #include "qemu/units.h"
  33 #include "cpu.h"
  34 #include "exec/helper-proto.h"
  35 #include "qemu/host-utils.h"
  36 #include "exec/exec-all.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
  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, true), GETPC());
  71 }
  72
  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
  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  */
 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  */
 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  */
 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  */
 228 static void 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         split_tlb_entry_spec_way(env, v, dtlb, vpn, *wi, ei);
 234     } else {
 235         *vpn = v & REGION_PAGE_MASK;
 236         *wi = 0;
 237         *ei = (v >> 29) & 0x7;
 238     }
 239 }
 240
 241 static xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env, bool dtlb,
 242                                               unsigned wi, unsigned ei)
 243 {
 244     return dtlb ?
 245         env->dtlb[wi] + ei :
 246         env->itlb[wi] + ei;
 247 }
 248
 249 static xtensa_tlb_entry *get_tlb_entry(CPUXtensaState *env,
 250         uint32_t v, bool dtlb, uint32_t *pwi)
 251 {
 252     uint32_t vpn;
 253     uint32_t wi;
 254     uint32_t ei;
 255
 256     split_tlb_entry_spec(env, v, dtlb, &vpn, &wi, &ei);
 257     if (pwi) {
 258         *pwi = wi;
 259     }
 260     return xtensa_tlb_get_entry(env, dtlb, wi, ei);
 261 }
 262
 263 static void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
 264                                      xtensa_tlb_entry *entry, bool dtlb,
 265                                      unsigned wi, unsigned ei, uint32_t vpn,
 266                                      uint32_t pte)
 267 {
 268     entry->vaddr = vpn;
 269     entry->paddr = pte & xtensa_tlb_get_addr_mask(env, dtlb, wi);
 270     entry->asid = (env->sregs[RASID] >> ((pte >> 1) & 0x18)) & 0xff;
 271     entry->attr = pte & 0xf;
 272 }
 273
 274 static void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
 275                                  unsigned wi, unsigned ei,
 276                                  uint32_t vpn, uint32_t pte)
 277 {
 278     CPUState *cs = env_cpu(env);
 279     xtensa_tlb_entry *entry = xtensa_tlb_get_entry(env, dtlb, wi, ei);
 280
 281     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
 282         if (entry->variable) {
 283             if (entry->asid) {
 284                 tlb_flush_page(cs, entry->vaddr);
 285             }
 286             xtensa_tlb_set_entry_mmu(env, entry, dtlb, wi, ei, vpn, pte);
 287             tlb_flush_page(cs, entry->vaddr);
 288         } else {
 289             qemu_log_mask(LOG_GUEST_ERROR,
 290                           "%s %d, %d, %d trying to set immutable entry\n",
 291                           __func__, dtlb, wi, ei);
 292         }
 293     } else {
 294         tlb_flush_page(cs, entry->vaddr);
 295         if (xtensa_option_enabled(env->config,
 296                     XTENSA_OPTION_REGION_TRANSLATION)) {
 297             entry->paddr = pte & REGION_PAGE_MASK;
 298         }
 299         entry->attr = pte & 0xf;
 300     }
 301 }
 302
 303 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
 304 {
 305     XtensaCPU *cpu = XTENSA_CPU(cs);
 306     uint32_t paddr;
 307     uint32_t page_size;
 308     unsigned access;
 309
 310     if (xtensa_get_physical_addr(&cpu->env, false, addr, 0, 0,
 311                 &paddr, &page_size, &access) == 0) {
 312         return paddr;
 313     }
 314     if (xtensa_get_physical_addr(&cpu->env, false, addr, 2, 0,
 315                 &paddr, &page_size, &access) == 0) {
 316         return paddr;
 317     }
 318     return ~0;
 319 }
 320
 321 static void reset_tlb_mmu_all_ways(CPUXtensaState *env,
 322                                    const xtensa_tlb *tlb,
 323                                    xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE])
 324 {
 325     unsigned wi, ei;
 326
 327     for (wi = 0; wi < tlb->nways; ++wi) {
 328         for (ei = 0; ei < tlb->way_size[wi]; ++ei) {
 329             entry[wi][ei].asid = 0;
 330             entry[wi][ei].variable = true;
 331         }
 332     }
 333 }
 334
 335 static void reset_tlb_mmu_ways56(CPUXtensaState *env,
 336                                  const xtensa_tlb *tlb,
 337                                  xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE])
 338 {
 339     if (!tlb->varway56) {
 340         static const xtensa_tlb_entry way5[] = {
 341             {
 342                 .vaddr = 0xd0000000,
 343                 .paddr = 0,
 344                 .asid = 1,
 345                 .attr = 7,
 346                 .variable = false,
 347             }, {
 348                 .vaddr = 0xd8000000,
 349                 .paddr = 0,
 350                 .asid = 1,
 351                 .attr = 3,
 352                 .variable = false,
 353             }
 354         };
 355         static const xtensa_tlb_entry way6[] = {
 356             {
 357                 .vaddr = 0xe0000000,
 358                 .paddr = 0xf0000000,
 359                 .asid = 1,
 360                 .attr = 7,
 361                 .variable = false,
 362             }, {
 363                 .vaddr = 0xf0000000,
 364                 .paddr = 0xf0000000,
 365                 .asid = 1,
 366                 .attr = 3,
 367                 .variable = false,
 368             }
 369         };
 370         memcpy(entry[5], way5, sizeof(way5));
 371         memcpy(entry[6], way6, sizeof(way6));
 372     } else {
 373         uint32_t ei;
 374         for (ei = 0; ei < 8; ++ei) {
 375             entry[6][ei].vaddr = ei << 29;
 376             entry[6][ei].paddr = ei << 29;
 377             entry[6][ei].asid = 1;
 378             entry[6][ei].attr = 3;
 379         }
 380     }
 381 }
 382
 383 static void reset_tlb_region_way0(CPUXtensaState *env,
 384                                   xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE])
 385 {
 386     unsigned ei;
 387
 388     for (ei = 0; ei < 8; ++ei) {
 389         entry[0][ei].vaddr = ei << 29;
 390         entry[0][ei].paddr = ei << 29;
 391         entry[0][ei].asid = 1;
 392         entry[0][ei].attr = 2;
 393         entry[0][ei].variable = true;
 394     }
 395 }
 396
 397 void reset_mmu(CPUXtensaState *env)
 398 {
 399     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
 400         env->sregs[RASID] = 0x04030201;
 401         env->sregs[ITLBCFG] = 0;
 402         env->sregs[DTLBCFG] = 0;
 403         env->autorefill_idx = 0;
 404         reset_tlb_mmu_all_ways(env, &env->config->itlb, env->itlb);
 405         reset_tlb_mmu_all_ways(env, &env->config->dtlb, env->dtlb);
 406         reset_tlb_mmu_ways56(env, &env->config->itlb, env->itlb);
 407         reset_tlb_mmu_ways56(env, &env->config->dtlb, env->dtlb);
 408     } else if (xtensa_option_enabled(env->config, XTENSA_OPTION_MPU)) {
 409         unsigned i;
 410
 411         env->sregs[MPUENB] = 0;
 412         env->sregs[MPUCFG] = env->config->n_mpu_fg_segments;
 413         env->sregs[CACHEADRDIS] = 0;
 414         assert(env->config->n_mpu_bg_segments > 0 &&
 415                env->config->mpu_bg[0].vaddr == 0);
 416         for (i = 1; i < env->config->n_mpu_bg_segments; ++i) {
 417             assert(env->config->mpu_bg[i].vaddr >=
 418                    env->config->mpu_bg[i - 1].vaddr);
 419         }
 420     } else {
 421         env->sregs[CACHEATTR] = 0x22222222;
 422         reset_tlb_region_way0(env, env->itlb);
 423         reset_tlb_region_way0(env, env->dtlb);
 424     }
 425 }
 426
 427 static unsigned get_ring(const CPUXtensaState *env, uint8_t asid)
 428 {
 429     unsigned i;
 430     for (i = 0; i < 4; ++i) {
 431         if (((env->sregs[RASID] >> i * 8) & 0xff) == asid) {
 432             return i;
 433         }
 434     }
 435     return 0xff;
 436 }
 437
 438 /*!
 439  * Lookup xtensa TLB for the given virtual address.
 440  * See ISA, 4.6.2.2
 441  *
 442  * \param pwi: [out] way index
 443  * \param pei: [out] entry index
 444  * \param pring: [out] access ring
 445  * \return 0 if ok, exception cause code otherwise
 446  */
 447 static int xtensa_tlb_lookup(const CPUXtensaState *env,
 448                              uint32_t addr, bool dtlb,
 449                              uint32_t *pwi, uint32_t *pei, uint8_t *pring)
 450 {
 451     const xtensa_tlb *tlb = dtlb ?
 452         &env->config->dtlb : &env->config->itlb;
 453     const xtensa_tlb_entry (*entry)[MAX_TLB_WAY_SIZE] = dtlb ?
 454         env->dtlb : env->itlb;
 455
 456     int nhits = 0;
 457     unsigned wi;
 458
 459     for (wi = 0; wi < tlb->nways; ++wi) {
 460         uint32_t vpn;
 461         uint32_t ei;
 462         split_tlb_entry_spec_way(env, addr, dtlb, &vpn, wi, &ei);
 463         if (entry[wi][ei].vaddr == vpn && entry[wi][ei].asid) {
 464             unsigned ring = get_ring(env, entry[wi][ei].asid);
 465             if (ring < 4) {
 466                 if (++nhits > 1) {
 467                     return dtlb ?
 468                         LOAD_STORE_TLB_MULTI_HIT_CAUSE :
 469                         INST_TLB_MULTI_HIT_CAUSE;
 470                 }
 471                 *pwi = wi;
 472                 *pei = ei;
 473                 *pring = ring;
 474             }
 475         }
 476     }
 477     return nhits ? 0 :
 478         (dtlb ? LOAD_STORE_TLB_MISS_CAUSE : INST_TLB_MISS_CAUSE);
 479 }
 480
 481 uint32_t HELPER(rtlb0)(CPUXtensaState *env, uint32_t v, uint32_t dtlb)
 482 {
 483     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
 484         uint32_t wi;
 485         const xtensa_tlb_entry *entry = get_tlb_entry(env, v, dtlb, &wi);
 486         return (entry->vaddr & get_vpn_mask(env, dtlb, wi)) | entry->asid;
 487     } else {
 488         return v & REGION_PAGE_MASK;
 489     }
 490 }
 491
 492 uint32_t HELPER(rtlb1)(CPUXtensaState *env, uint32_t v, uint32_t dtlb)
 493 {
 494     const xtensa_tlb_entry *entry = get_tlb_entry(env, v, dtlb, NULL);
 495     return entry->paddr | entry->attr;
 496 }
 497
 498 void HELPER(itlb)(CPUXtensaState *env, uint32_t v, uint32_t dtlb)
 499 {
 500     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
 501         uint32_t wi;
 502         xtensa_tlb_entry *entry = get_tlb_entry(env, v, dtlb, &wi);
 503         if (entry->variable && entry->asid) {
 504             tlb_flush_page(env_cpu(env), entry->vaddr);
 505             entry->asid = 0;
 506         }
 507     }
 508 }
 509
 510 uint32_t HELPER(ptlb)(CPUXtensaState *env, uint32_t v, uint32_t dtlb)
 511 {
 512     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
 513         uint32_t wi;
 514         uint32_t ei;
 515         uint8_t ring;
 516         int res = xtensa_tlb_lookup(env, v, dtlb, &wi, &ei, &ring);
 517
 518         switch (res) {
 519         case 0:
 520             if (ring >= xtensa_get_ring(env)) {
 521                 return (v & 0xfffff000) | wi | (dtlb ? 0x10 : 0x8);
 522             }
 523             break;
 524
 525         case INST_TLB_MULTI_HIT_CAUSE:
 526         case LOAD_STORE_TLB_MULTI_HIT_CAUSE:
 527             HELPER(exception_cause_vaddr)(env, env->pc, res, v);
 528             break;
 529         }
 530         return 0;
 531     } else {
 532         return (v & REGION_PAGE_MASK) | 0x1;
 533     }
 534 }
 535
 536 void HELPER(wtlb)(CPUXtensaState *env, uint32_t p, uint32_t v, uint32_t dtlb)
 537 {
 538     uint32_t vpn;
 539     uint32_t wi;
 540     uint32_t ei;
 541     split_tlb_entry_spec(env, v, dtlb, &vpn, &wi, &ei);
 542     xtensa_tlb_set_entry(env, dtlb, wi, ei, vpn, p);
 543 }
 544
 545 /*!
 546  * Convert MMU ATTR to PAGE_{READ,WRITE,EXEC} mask.
 547  * See ISA, 4.6.5.10
 548  */
 549 static unsigned mmu_attr_to_access(uint32_t attr)
 550 {
 551     unsigned access = 0;
 552
 553     if (attr < 12) {
 554         access |= PAGE_READ;
 555         if (attr & 0x1) {
 556             access |= PAGE_EXEC;
 557         }
 558         if (attr & 0x2) {
 559             access |= PAGE_WRITE;
 560         }
 561
 562         switch (attr & 0xc) {
 563         case 0:
 564             access |= PAGE_CACHE_BYPASS;
 565             break;
 566
 567         case 4:
 568             access |= PAGE_CACHE_WB;
 569             break;
 570
 571         case 8:
 572             access |= PAGE_CACHE_WT;
 573             break;
 574         }
 575     } else if (attr == 13) {
 576         access |= PAGE_READ | PAGE_WRITE | PAGE_CACHE_ISOLATE;
 577     }
 578     return access;
 579 }
 580
 581 /*!
 582  * Convert region protection ATTR to PAGE_{READ,WRITE,EXEC} mask.
 583  * See ISA, 4.6.3.3
 584  */
 585 static unsigned region_attr_to_access(uint32_t attr)
 586 {
 587     static const unsigned access[16] = {
 588          [0] = PAGE_READ | PAGE_WRITE             | PAGE_CACHE_WT,
 589          [1] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WT,
 590          [2] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_BYPASS,
 591          [3] =                          PAGE_EXEC | PAGE_CACHE_WB,
 592          [4] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WB,
 593          [5] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WB,
 594         [14] = PAGE_READ | PAGE_WRITE             | PAGE_CACHE_ISOLATE,
 595     };
 596
 597     return access[attr & 0xf];
 598 }
 599
 600 /*!
 601  * Convert cacheattr to PAGE_{READ,WRITE,EXEC} mask.
 602  * See ISA, A.2.14 The Cache Attribute Register
 603  */
 604 static unsigned cacheattr_attr_to_access(uint32_t attr)
 605 {
 606     static const unsigned access[16] = {
 607          [0] = PAGE_READ | PAGE_WRITE             | PAGE_CACHE_WT,
 608          [1] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WT,
 609          [2] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_BYPASS,
 610          [3] =                          PAGE_EXEC | PAGE_CACHE_WB,
 611          [4] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WB,
 612         [14] = PAGE_READ | PAGE_WRITE             | PAGE_CACHE_ISOLATE,
 613     };
 614
 615     return access[attr & 0xf];
 616 }
 617
 618 struct attr_pattern {
 619     uint32_t mask;
 620     uint32_t value;
 621 };
 622
 623 static int attr_pattern_match(uint32_t attr,
 624                               const struct attr_pattern *pattern,
 625                               size_t n)
 626 {
 627     size_t i;
 628
 629     for (i = 0; i < n; ++i) {
 630         if ((attr & pattern[i].mask) == pattern[i].value) {
 631             return 1;
 632         }
 633     }
 634     return 0;
 635 }
 636
 637 static unsigned mpu_attr_to_cpu_cache(uint32_t attr)
 638 {
 639     static const struct attr_pattern cpu_c[] = {
 640         { .mask = 0x18f, .value = 0x089 },
 641         { .mask = 0x188, .value = 0x080 },
 642         { .mask = 0x180, .value = 0x180 },
 643     };
 644
 645     unsigned type = 0;
 646
 647     if (attr_pattern_match(attr, cpu_c, ARRAY_SIZE(cpu_c))) {
 648         type |= XTENSA_MPU_TYPE_CPU_CACHE;
 649         if (attr & 0x10) {
 650             type |= XTENSA_MPU_TYPE_CPU_C;
 651         }
 652         if (attr & 0x20) {
 653             type |= XTENSA_MPU_TYPE_CPU_W;
 654         }
 655         if (attr & 0x40) {
 656             type |= XTENSA_MPU_TYPE_CPU_R;
 657         }
 658     }
 659     return type;
 660 }
 661
 662 static unsigned mpu_attr_to_type(uint32_t attr)
 663 {
 664     static const struct attr_pattern device_type[] = {
 665         { .mask = 0x1f6, .value = 0x000 },
 666         { .mask = 0x1f6, .value = 0x006 },
 667     };
 668     static const struct attr_pattern sys_nc_type[] = {
 669         { .mask = 0x1fe, .value = 0x018 },
 670         { .mask = 0x1fe, .value = 0x01e },
 671         { .mask = 0x18f, .value = 0x089 },
 672     };
 673     static const struct attr_pattern sys_c_type[] = {
 674         { .mask = 0x1f8, .value = 0x010 },
 675         { .mask = 0x188, .value = 0x080 },
 676         { .mask = 0x1f0, .value = 0x030 },
 677         { .mask = 0x180, .value = 0x180 },
 678     };
 679     static const struct attr_pattern b[] = {
 680         { .mask = 0x1f7, .value = 0x001 },
 681         { .mask = 0x1f7, .value = 0x007 },
 682         { .mask = 0x1ff, .value = 0x019 },
 683         { .mask = 0x1ff, .value = 0x01f },
 684     };
 685
 686     unsigned type = 0;
 687
 688     attr = (attr & XTENSA_MPU_MEM_TYPE_MASK) >> XTENSA_MPU_MEM_TYPE_SHIFT;
 689     if (attr_pattern_match(attr, device_type, ARRAY_SIZE(device_type))) {
 690         type |= XTENSA_MPU_SYSTEM_TYPE_DEVICE;
 691         if (attr & 0x80) {
 692             type |= XTENSA_MPU_TYPE_INT;
 693         }
 694     }
 695     if (attr_pattern_match(attr, sys_nc_type, ARRAY_SIZE(sys_nc_type))) {
 696         type |= XTENSA_MPU_SYSTEM_TYPE_NC;
 697     }
 698     if (attr_pattern_match(attr, sys_c_type, ARRAY_SIZE(sys_c_type))) {
 699         type |= XTENSA_MPU_SYSTEM_TYPE_C;
 700         if (attr & 0x1) {
 701             type |= XTENSA_MPU_TYPE_SYS_C;
 702         }
 703         if (attr & 0x2) {
 704             type |= XTENSA_MPU_TYPE_SYS_W;
 705         }
 706         if (attr & 0x4) {
 707             type |= XTENSA_MPU_TYPE_SYS_R;
 708         }
 709     }
 710     if (attr_pattern_match(attr, b, ARRAY_SIZE(b))) {
 711         type |= XTENSA_MPU_TYPE_B;
 712     }
 713     type |= mpu_attr_to_cpu_cache(attr);
 714
 715     return type;
 716 }
 717
 718 static unsigned mpu_attr_to_access(uint32_t attr, unsigned ring)
 719 {
 720     static const unsigned access[2][16] = {
 721         [0] = {
 722              [4] = PAGE_READ,
 723              [5] = PAGE_READ              | PAGE_EXEC,
 724              [6] = PAGE_READ | PAGE_WRITE,
 725              [7] = PAGE_READ | PAGE_WRITE | PAGE_EXEC,
 726              [8] =             PAGE_WRITE,
 727              [9] = PAGE_READ | PAGE_WRITE,
 728             [10] = PAGE_READ | PAGE_WRITE,
 729             [11] = PAGE_READ | PAGE_WRITE | PAGE_EXEC,
 730             [12] = PAGE_READ,
 731             [13] = PAGE_READ              | PAGE_EXEC,
 732             [14] = PAGE_READ | PAGE_WRITE,
 733             [15] = PAGE_READ | PAGE_WRITE | PAGE_EXEC,
 734         },
 735         [1] = {
 736              [8] =             PAGE_WRITE,
 737              [9] = PAGE_READ | PAGE_WRITE | PAGE_EXEC,
 738             [10] = PAGE_READ,
 739             [11] = PAGE_READ              | PAGE_EXEC,
 740             [12] = PAGE_READ,
 741             [13] = PAGE_READ              | PAGE_EXEC,
 742             [14] = PAGE_READ | PAGE_WRITE,
 743             [15] = PAGE_READ | PAGE_WRITE | PAGE_EXEC,
 744         },
 745     };
 746     unsigned rv;
 747     unsigned type;
 748
 749     type = mpu_attr_to_cpu_cache(attr);
 750     rv = access[ring != 0][(attr & XTENSA_MPU_ACC_RIGHTS_MASK) >>
 751         XTENSA_MPU_ACC_RIGHTS_SHIFT];
 752
 753     if (type & XTENSA_MPU_TYPE_CPU_CACHE) {
 754         rv |= (type & XTENSA_MPU_TYPE_CPU_C) ? PAGE_CACHE_WB : PAGE_CACHE_WT;
 755     } else {
 756         rv |= PAGE_CACHE_BYPASS;
 757     }
 758     return rv;
 759 }
 760
 761 static bool is_access_granted(unsigned access, int is_write)
 762 {
 763     switch (is_write) {
 764     case 0:
 765         return access & PAGE_READ;
 766
 767     case 1:
 768         return access & PAGE_WRITE;
 769
 770     case 2:
 771         return access & PAGE_EXEC;
 772
 773     default:
 774         return 0;
 775     }
 776 }
 777
 778 static bool get_pte(CPUXtensaState *env, uint32_t vaddr, uint32_t *pte);
 779
 780 static int get_physical_addr_mmu(CPUXtensaState *env, bool update_tlb,
 781                                  uint32_t vaddr, int is_write, int mmu_idx,
 782                                  uint32_t *paddr, uint32_t *page_size,
 783                                  unsigned *access, bool may_lookup_pt)
 784 {
 785     bool dtlb = is_write != 2;
 786     uint32_t wi;
 787     uint32_t ei;
 788     uint8_t ring;
 789     uint32_t vpn;
 790     uint32_t pte;
 791     const xtensa_tlb_entry *entry = NULL;
 792     xtensa_tlb_entry tmp_entry;
 793     int ret = xtensa_tlb_lookup(env, vaddr, dtlb, &wi, &ei, &ring);
 794
 795     if ((ret == INST_TLB_MISS_CAUSE || ret == LOAD_STORE_TLB_MISS_CAUSE) &&
 796         may_lookup_pt && get_pte(env, vaddr, &pte)) {
 797         ring = (pte >> 4) & 0x3;
 798         wi = 0;
 799         split_tlb_entry_spec_way(env, vaddr, dtlb, &vpn, wi, &ei);
 800
 801         if (update_tlb) {
 802             wi = ++env->autorefill_idx & 0x3;
 803             xtensa_tlb_set_entry(env, dtlb, wi, ei, vpn, pte);
 804             env->sregs[EXCVADDR] = vaddr;
 805             qemu_log_mask(CPU_LOG_MMU, "%s: autorefill(%08x): %08x -> %08x\n",
 806                           __func__, vaddr, vpn, pte);
 807         } else {
 808             xtensa_tlb_set_entry_mmu(env, &tmp_entry, dtlb, wi, ei, vpn, pte);
 809             entry = &tmp_entry;
 810         }
 811         ret = 0;
 812     }
 813     if (ret != 0) {
 814         return ret;
 815     }
 816
 817     if (entry == NULL) {
 818         entry = xtensa_tlb_get_entry(env, dtlb, wi, ei);
 819     }
 820
 821     if (ring < mmu_idx) {
 822         return dtlb ?
 823             LOAD_STORE_PRIVILEGE_CAUSE :
 824             INST_FETCH_PRIVILEGE_CAUSE;
 825     }
 826
 827     *access = mmu_attr_to_access(entry->attr) &
 828         ~(dtlb ? PAGE_EXEC : PAGE_READ | PAGE_WRITE);
 829     if (!is_access_granted(*access, is_write)) {
 830         return dtlb ?
 831             (is_write ?
 832              STORE_PROHIBITED_CAUSE :
 833              LOAD_PROHIBITED_CAUSE) :
 834             INST_FETCH_PROHIBITED_CAUSE;
 835     }
 836
 837     *paddr = entry->paddr | (vaddr & ~xtensa_tlb_get_addr_mask(env, dtlb, wi));
 838     *page_size = ~xtensa_tlb_get_addr_mask(env, dtlb, wi) + 1;
 839
 840     return 0;
 841 }
 842
 843 static bool get_pte(CPUXtensaState *env, uint32_t vaddr, uint32_t *pte)
 844 {
 845     CPUState *cs = env_cpu(env);
 846     uint32_t paddr;
 847     uint32_t page_size;
 848     unsigned access;
 849     uint32_t pt_vaddr =
 850         (env->sregs[PTEVADDR] | (vaddr >> 10)) & 0xfffffffc;
 851     int ret = get_physical_addr_mmu(env, false, pt_vaddr, 0, 0,
 852                                     &paddr, &page_size, &access, false);
 853
 854     if (ret == 0) {
 855         qemu_log_mask(CPU_LOG_MMU,
 856                       "%s: autorefill(%08x): PTE va = %08x, pa = %08x\n",
 857                       __func__, vaddr, pt_vaddr, paddr);
 858     } else {
 859         qemu_log_mask(CPU_LOG_MMU,
 860                       "%s: autorefill(%08x): PTE va = %08x, failed (%d)\n",
 861                       __func__, vaddr, pt_vaddr, ret);
 862     }
 863
 864     if (ret == 0) {
 865         MemTxResult result;
 866
 867         *pte = address_space_ldl(cs->as, paddr, MEMTXATTRS_UNSPECIFIED,
 868                                  &result);
 869         if (result != MEMTX_OK) {
 870             qemu_log_mask(CPU_LOG_MMU,
 871                           "%s: couldn't load PTE: transaction failed (%u)\n",
 872                           __func__, (unsigned)result);
 873             ret = 1;
 874         }
 875     }
 876     return ret == 0;
 877 }
 878
 879 static int get_physical_addr_region(CPUXtensaState *env,
 880                                     uint32_t vaddr, int is_write, int mmu_idx,
 881                                     uint32_t *paddr, uint32_t *page_size,
 882                                     unsigned *access)
 883 {
 884     bool dtlb = is_write != 2;
 885     uint32_t wi = 0;
 886     uint32_t ei = (vaddr >> 29) & 0x7;
 887     const xtensa_tlb_entry *entry =
 888         xtensa_tlb_get_entry(env, dtlb, wi, ei);
 889
 890     *access = region_attr_to_access(entry->attr);
 891     if (!is_access_granted(*access, is_write)) {
 892         return dtlb ?
 893             (is_write ?
 894              STORE_PROHIBITED_CAUSE :
 895              LOAD_PROHIBITED_CAUSE) :
 896             INST_FETCH_PROHIBITED_CAUSE;
 897     }
 898
 899     *paddr = entry->paddr | (vaddr & ~REGION_PAGE_MASK);
 900     *page_size = ~REGION_PAGE_MASK + 1;
 901
 902     return 0;
 903 }
 904
 905 static int xtensa_mpu_lookup(const xtensa_mpu_entry *entry, unsigned n,
 906                              uint32_t vaddr, unsigned *segment)
 907 {
 908     unsigned nhits = 0;
 909     unsigned i;
 910
 911     for (i = 0; i < n; ++i) {
 912         if (vaddr >= entry[i].vaddr &&
 913             (i == n - 1 || vaddr < entry[i + 1].vaddr)) {
 914             if (nhits++) {
 915                 break;
 916             }
 917             *segment = i;
 918         }
 919     }
 920     return nhits;
 921 }
 922
 923 void HELPER(wsr_mpuenb)(CPUXtensaState *env, uint32_t v)
 924 {
 925     v &= (2u << (env->config->n_mpu_fg_segments - 1)) - 1;
 926
 927     if (v != env->sregs[MPUENB]) {
 928         env->sregs[MPUENB] = v;
 929         tlb_flush(env_cpu(env));
 930     }
 931 }
 932
 933 void HELPER(wptlb)(CPUXtensaState *env, uint32_t p, uint32_t v)
 934 {
 935     unsigned segment = p & XTENSA_MPU_SEGMENT_MASK;
 936
 937     if (segment < env->config->n_mpu_fg_segments) {
 938         env->mpu_fg[segment].vaddr = v & -env->config->mpu_align;
 939         env->mpu_fg[segment].attr = p & XTENSA_MPU_ATTR_MASK;
 940         env->sregs[MPUENB] = deposit32(env->sregs[MPUENB], segment, 1, v);
 941         tlb_flush(env_cpu(env));
 942     }
 943 }
 944
 945 uint32_t HELPER(rptlb0)(CPUXtensaState *env, uint32_t s)
 946 {
 947     unsigned segment = s & XTENSA_MPU_SEGMENT_MASK;
 948
 949     if (segment < env->config->n_mpu_fg_segments) {
 950         return env->mpu_fg[segment].vaddr |
 951             extract32(env->sregs[MPUENB], segment, 1);
 952     } else {
 953         return 0;
 954     }
 955 }
 956
 957 uint32_t HELPER(rptlb1)(CPUXtensaState *env, uint32_t s)
 958 {
 959     unsigned segment = s & XTENSA_MPU_SEGMENT_MASK;
 960
 961     if (segment < env->config->n_mpu_fg_segments) {
 962         return env->mpu_fg[segment].attr;
 963     } else {
 964         return 0;
 965     }
 966 }
 967
 968 uint32_t HELPER(pptlb)(CPUXtensaState *env, uint32_t v)
 969 {
 970     unsigned nhits;
 971     unsigned segment = XTENSA_MPU_PROBE_B;
 972     unsigned bg_segment;
 973
 974     nhits = xtensa_mpu_lookup(env->mpu_fg, env->config->n_mpu_fg_segments,
 975                               v, &segment);
 976     if (nhits > 1) {
 977         HELPER(exception_cause_vaddr)(env, env->pc,
 978                                       LOAD_STORE_TLB_MULTI_HIT_CAUSE, v);
 979     } else if (nhits == 1 && (env->sregs[MPUENB] & (1u << segment))) {
 980         return env->mpu_fg[segment].attr | segment | XTENSA_MPU_PROBE_V;
 981     } else {
 982         xtensa_mpu_lookup(env->config->mpu_bg,
 983                           env->config->n_mpu_bg_segments,
 984                           v, &bg_segment);
 985         return env->config->mpu_bg[bg_segment].attr | segment;
 986     }
 987 }
 988
 989 static int get_physical_addr_mpu(CPUXtensaState *env,
 990                                  uint32_t vaddr, int is_write, int mmu_idx,
 991                                  uint32_t *paddr, uint32_t *page_size,
 992                                  unsigned *access)
 993 {
 994     unsigned nhits;
 995     unsigned segment;
 996     uint32_t attr;
 997
 998     nhits = xtensa_mpu_lookup(env->mpu_fg, env->config->n_mpu_fg_segments,
 999                               vaddr, &segment);
1000     if (nhits > 1) {
1001         return is_write < 2 ?
1002             LOAD_STORE_TLB_MULTI_HIT_CAUSE :
1003             INST_TLB_MULTI_HIT_CAUSE;
1004     } else if (nhits == 1 && (env->sregs[MPUENB] & (1u << segment))) {
1005         attr = env->mpu_fg[segment].attr;
1006     } else {
1007         xtensa_mpu_lookup(env->config->mpu_bg,
1008                           env->config->n_mpu_bg_segments,
1009                           vaddr, &segment);
1010         attr = env->config->mpu_bg[segment].attr;
1011     }
1012
1013     *access = mpu_attr_to_access(attr, mmu_idx);
1014     if (!is_access_granted(*access, is_write)) {
1015         return is_write < 2 ?
1016             (is_write ?
1017              STORE_PROHIBITED_CAUSE :
1018              LOAD_PROHIBITED_CAUSE) :
1019             INST_FETCH_PROHIBITED_CAUSE;
1020     }
1021     *paddr = vaddr;
1022     *page_size = env->config->mpu_align;
1023     return 0;
1024 }
1025
1026 /*!
1027  * Convert virtual address to physical addr.
1028  * MMU may issue pagewalk and change xtensa autorefill TLB way entry.
1029  *
1030  * \return 0 if ok, exception cause code otherwise
1031  */
1032 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
1033                              uint32_t vaddr, int is_write, int mmu_idx,
1034                              uint32_t *paddr, uint32_t *page_size,
1035                              unsigned *access)
1036 {
1037     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
1038         return get_physical_addr_mmu(env, update_tlb,
1039                                      vaddr, is_write, mmu_idx, paddr,
1040                                      page_size, access, true);
1041     } else if (xtensa_option_bits_enabled(env->config,
1042                 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_PROTECTION) |
1043                 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_TRANSLATION))) {
1044         return get_physical_addr_region(env, vaddr, is_write, mmu_idx,
1045                                         paddr, page_size, access);
1046     } else if (xtensa_option_enabled(env->config, XTENSA_OPTION_MPU)) {
1047         return get_physical_addr_mpu(env, vaddr, is_write, mmu_idx,
1048                                      paddr, page_size, access);
1049     } else {
1050         *paddr = vaddr;
1051         *page_size = TARGET_PAGE_SIZE;
1052         *access = cacheattr_attr_to_access(env->sregs[CACHEATTR] >>
1053                                            ((vaddr & 0xe0000000) >> 27));
1054         return 0;
1055     }
1056 }
1057
1058 static void dump_tlb(CPUXtensaState *env, bool dtlb)
1059 {
1060     unsigned wi, ei;
1061     const xtensa_tlb *conf =
1062         dtlb ? &env->config->dtlb : &env->config->itlb;
1063     unsigned (*attr_to_access)(uint32_t) =
1064         xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) ?
1065         mmu_attr_to_access : region_attr_to_access;
1066
1067     for (wi = 0; wi < conf->nways; ++wi) {
1068         uint32_t sz = ~xtensa_tlb_get_addr_mask(env, dtlb, wi) + 1;
1069         const char *sz_text;
1070         bool print_header = true;
1071
1072         if (sz >= 0x100000) {
1073             sz /= MiB;
1074             sz_text = "MB";
1075         } else {
1076             sz /= KiB;
1077             sz_text = "KB";
1078         }
1079
1080         for (ei = 0; ei < conf->way_size[wi]; ++ei) {
1081             const xtensa_tlb_entry *entry =
1082                 xtensa_tlb_get_entry(env, dtlb, wi, ei);
1083
1084             if (entry->asid) {
1085                 static const char * const cache_text[8] = {
1086                     [PAGE_CACHE_BYPASS >> PAGE_CACHE_SHIFT] = "Bypass",
1087                     [PAGE_CACHE_WT >> PAGE_CACHE_SHIFT] = "WT",
1088                     [PAGE_CACHE_WB >> PAGE_CACHE_SHIFT] = "WB",
1089                     [PAGE_CACHE_ISOLATE >> PAGE_CACHE_SHIFT] = "Isolate",
1090                 };
1091                 unsigned access = attr_to_access(entry->attr);
1092                 unsigned cache_idx = (access & PAGE_CACHE_MASK) >>
1093                     PAGE_CACHE_SHIFT;
1094
1095                 if (print_header) {
1096                     print_header = false;
1097                     qemu_printf("Way %u (%d %s)\n", wi, sz, sz_text);
1098                     qemu_printf("\tVaddr       Paddr       ASID  Attr RWX Cache\n"
1099                                 "\t----------  ----------  ----  ---- --- -------\n");
1100                 }
1101                 qemu_printf("\t0x%08x  0x%08x  0x%02x  0x%02x %c%c%c %s\n",
1102                             entry->vaddr,
1103                             entry->paddr,
1104                             entry->asid,
1105                             entry->attr,
1106                             (access & PAGE_READ) ? 'R' : '-',
1107                             (access & PAGE_WRITE) ? 'W' : '-',
1108                             (access & PAGE_EXEC) ? 'X' : '-',
1109                             cache_text[cache_idx] ?
1110                             cache_text[cache_idx] : "Invalid");
1111             }
1112         }
1113     }
1114 }
1115
1116 static void dump_mpu(CPUXtensaState *env,
1117                      const xtensa_mpu_entry *entry, unsigned n)
1118 {
1119     unsigned i;
1120
1121     qemu_printf("\t%s  Vaddr       Attr        Ring0  Ring1  System Type    CPU cache\n"
1122                 "\t%s  ----------  ----------  -----  -----  -------------  ---------\n",
1123                 env ? "En" : "  ",
1124                 env ? "--" : "  ");
1125
1126     for (i = 0; i < n; ++i) {
1127         uint32_t attr = entry[i].attr;
1128         unsigned access0 = mpu_attr_to_access(attr, 0);
1129         unsigned access1 = mpu_attr_to_access(attr, 1);
1130         unsigned type = mpu_attr_to_type(attr);
1131         char cpu_cache = (type & XTENSA_MPU_TYPE_CPU_CACHE) ? '-' : ' ';
1132
1133         qemu_printf("\t %c  0x%08x  0x%08x   %c%c%c    %c%c%c   ",
1134                     env ?
1135                     ((env->sregs[MPUENB] & (1u << i)) ? '+' : '-') : ' ',
1136                     entry[i].vaddr, attr,
1137                     (access0 & PAGE_READ) ? 'R' : '-',
1138                     (access0 & PAGE_WRITE) ? 'W' : '-',
1139                     (access0 & PAGE_EXEC) ? 'X' : '-',
1140                     (access1 & PAGE_READ) ? 'R' : '-',
1141                     (access1 & PAGE_WRITE) ? 'W' : '-',
1142                     (access1 & PAGE_EXEC) ? 'X' : '-');
1143
1144         switch (type & XTENSA_MPU_SYSTEM_TYPE_MASK) {
1145         case XTENSA_MPU_SYSTEM_TYPE_DEVICE:
1146             qemu_printf("Device %cB %3s\n",
1147                         (type & XTENSA_MPU_TYPE_B) ? ' ' : 'n',
1148                         (type & XTENSA_MPU_TYPE_INT) ? "int" : "");
1149             break;
1150         case XTENSA_MPU_SYSTEM_TYPE_NC:
1151             qemu_printf("Sys NC %cB      %c%c%c\n",
1152                         (type & XTENSA_MPU_TYPE_B) ? ' ' : 'n',
1153                         (type & XTENSA_MPU_TYPE_CPU_R) ? 'r' : cpu_cache,
1154                         (type & XTENSA_MPU_TYPE_CPU_W) ? 'w' : cpu_cache,
1155                         (type & XTENSA_MPU_TYPE_CPU_C) ? 'c' : cpu_cache);
1156             break;
1157         case XTENSA_MPU_SYSTEM_TYPE_C:
1158             qemu_printf("Sys  C %c%c%c     %c%c%c\n",
1159                         (type & XTENSA_MPU_TYPE_SYS_R) ? 'R' : '-',
1160                         (type & XTENSA_MPU_TYPE_SYS_W) ? 'W' : '-',
1161                         (type & XTENSA_MPU_TYPE_SYS_C) ? 'C' : '-',
1162                         (type & XTENSA_MPU_TYPE_CPU_R) ? 'r' : cpu_cache,
1163                         (type & XTENSA_MPU_TYPE_CPU_W) ? 'w' : cpu_cache,
1164                         (type & XTENSA_MPU_TYPE_CPU_C) ? 'c' : cpu_cache);
1165             break;
1166         default:
1167             qemu_printf("Unknown\n");
1168             break;
1169         }
1170     }
1171 }
1172
1173 void dump_mmu(CPUXtensaState *env)
1174 {
1175     if (xtensa_option_bits_enabled(env->config,
1176                 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_PROTECTION) |
1177                 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_TRANSLATION) |
1178                 XTENSA_OPTION_BIT(XTENSA_OPTION_MMU))) {
1179
1180         qemu_printf("ITLB:\n");
1181         dump_tlb(env, false);
1182         qemu_printf("\nDTLB:\n");
1183         dump_tlb(env, true);
1184     } else if (xtensa_option_enabled(env->config, XTENSA_OPTION_MPU)) {
1185         qemu_printf("Foreground map:\n");
1186         dump_mpu(env, env->mpu_fg, env->config->n_mpu_fg_segments);
1187         qemu_printf("\nBackground map:\n");
1188         dump_mpu(NULL, env->config->mpu_bg, env->config->n_mpu_bg_segments);
1189     } else {
1190         qemu_printf("No TLB for this CPU core\n");
1191     }
1192 }