target-xtensa/helper.c

   1 /*
   2  * Copyright (c) 2011, 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 "cpu.h"
  30 #include "exec/exec-all.h"
  31 #include "exec/gdbstub.h"
  32 #include "qemu/host-utils.h"
  33 #if !defined(CONFIG_USER_ONLY)
  34 #include "hw/loader.h"
  35 #endif
  36
  37 static struct XtensaConfigList *xtensa_cores;
  38
  39 static void xtensa_core_class_init(ObjectClass *oc, void *data)
  40 {
  41     CPUClass *cc = CPU_CLASS(oc);
  42     XtensaCPUClass *xcc = XTENSA_CPU_CLASS(oc);
  43     const XtensaConfig *config = data;
  44
  45     xcc->config = config;
  46
  47     /* Use num_core_regs to see only non-privileged registers in an unmodified
  48      * gdb. Use num_regs to see all registers. gdb modification is required
  49      * for that: reset bit 0 in the 'flags' field of the registers definitions
  50      * in the gdb/xtensa-config.c inside gdb source tree or inside gdb overlay.
  51      */
  52     cc->gdb_num_core_regs = config->gdb_regmap.num_regs;
  53 }
  54
  55 void xtensa_finalize_config(XtensaConfig *config)
  56 {
  57     unsigned i, n = 0;
  58
  59     if (config->gdb_regmap.num_regs) {
  60         return;
  61     }
  62
  63     for (i = 0; config->gdb_regmap.reg[i].targno >= 0; ++i) {
  64         n += (config->gdb_regmap.reg[i].type != 6);
  65     }
  66     config->gdb_regmap.num_regs = n;
  67 }
  68
  69 void xtensa_register_core(XtensaConfigList *node)
  70 {
  71     TypeInfo type = {
  72         .parent = TYPE_XTENSA_CPU,
  73         .class_init = xtensa_core_class_init,
  74         .class_data = (void *)node->config,
  75     };
  76
  77     node->next = xtensa_cores;
  78     xtensa_cores = node;
  79     type.name = g_strdup_printf("%s-" TYPE_XTENSA_CPU, node->config->name);
  80     type_register(&type);
  81     g_free((gpointer)type.name);
  82 }
  83
  84 static uint32_t check_hw_breakpoints(CPUXtensaState *env)
  85 {
  86     unsigned i;
  87
  88     for (i = 0; i < env->config->ndbreak; ++i) {
  89         if (env->cpu_watchpoint[i] &&
  90                 env->cpu_watchpoint[i]->flags & BP_WATCHPOINT_HIT) {
  91             return DEBUGCAUSE_DB | (i << DEBUGCAUSE_DBNUM_SHIFT);
  92         }
  93     }
  94     return 0;
  95 }
  96
  97 void xtensa_breakpoint_handler(CPUState *cs)
  98 {
  99     XtensaCPU *cpu = XTENSA_CPU(cs);
 100     CPUXtensaState *env = &cpu->env;
 101
 102     if (cs->watchpoint_hit) {
 103         if (cs->watchpoint_hit->flags & BP_CPU) {
 104             uint32_t cause;
 105
 106             cs->watchpoint_hit = NULL;
 107             cause = check_hw_breakpoints(env);
 108             if (cause) {
 109                 debug_exception_env(env, cause);
 110             }
 111             cpu_resume_from_signal(cs, NULL);
 112         }
 113     }
 114 }
 115
 116 XtensaCPU *cpu_xtensa_init(const char *cpu_model)
 117 {
 118     ObjectClass *oc;
 119     XtensaCPU *cpu;
 120     CPUXtensaState *env;
 121
 122     oc = cpu_class_by_name(TYPE_XTENSA_CPU, cpu_model);
 123     if (oc == NULL) {
 124         return NULL;
 125     }
 126
 127     cpu = XTENSA_CPU(object_new(object_class_get_name(oc)));
 128     env = &cpu->env;
 129
 130     xtensa_irq_init(env);
 131
 132     object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
 133
 134     return cpu;
 135 }
 136
 137
 138 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf)
 139 {
 140     XtensaConfigList *core = xtensa_cores;
 141     cpu_fprintf(f, "Available CPUs:\n");
 142     for (; core; core = core->next) {
 143         cpu_fprintf(f, "  %s\n", core->config->name);
 144     }
 145 }
 146
 147 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
 148 {
 149     XtensaCPU *cpu = XTENSA_CPU(cs);
 150     uint32_t paddr;
 151     uint32_t page_size;
 152     unsigned access;
 153
 154     if (xtensa_get_physical_addr(&cpu->env, false, addr, 0, 0,
 155                 &paddr, &page_size, &access) == 0) {
 156         return paddr;
 157     }
 158     if (xtensa_get_physical_addr(&cpu->env, false, addr, 2, 0,
 159                 &paddr, &page_size, &access) == 0) {
 160         return paddr;
 161     }
 162     return ~0;
 163 }
 164
 165 static uint32_t relocated_vector(CPUXtensaState *env, uint32_t vector)
 166 {
 167     if (xtensa_option_enabled(env->config,
 168                 XTENSA_OPTION_RELOCATABLE_VECTOR)) {
 169         return vector - env->config->vecbase + env->sregs[VECBASE];
 170     } else {
 171         return vector;
 172     }
 173 }
 174
 175 /*!
 176  * Handle penging IRQ.
 177  * For the high priority interrupt jump to the corresponding interrupt vector.
 178  * For the level-1 interrupt convert it to either user, kernel or double
 179  * exception with the 'level-1 interrupt' exception cause.
 180  */
 181 static void handle_interrupt(CPUXtensaState *env)
 182 {
 183     int level = env->pending_irq_level;
 184
 185     if (level > xtensa_get_cintlevel(env) &&
 186             level <= env->config->nlevel &&
 187             (env->config->level_mask[level] &
 188              env->sregs[INTSET] &
 189              env->sregs[INTENABLE])) {
 190         CPUState *cs = CPU(xtensa_env_get_cpu(env));
 191
 192         if (level > 1) {
 193             env->sregs[EPC1 + level - 1] = env->pc;
 194             env->sregs[EPS2 + level - 2] = env->sregs[PS];
 195             env->sregs[PS] =
 196                 (env->sregs[PS] & ~PS_INTLEVEL) | level | PS_EXCM;
 197             env->pc = relocated_vector(env,
 198                     env->config->interrupt_vector[level]);
 199         } else {
 200             env->sregs[EXCCAUSE] = LEVEL1_INTERRUPT_CAUSE;
 201
 202             if (env->sregs[PS] & PS_EXCM) {
 203                 if (env->config->ndepc) {
 204                     env->sregs[DEPC] = env->pc;
 205                 } else {
 206                     env->sregs[EPC1] = env->pc;
 207                 }
 208                 cs->exception_index = EXC_DOUBLE;
 209             } else {
 210                 env->sregs[EPC1] = env->pc;
 211                 cs->exception_index =
 212                     (env->sregs[PS] & PS_UM) ? EXC_USER : EXC_KERNEL;
 213             }
 214             env->sregs[PS] |= PS_EXCM;
 215         }
 216         env->exception_taken = 1;
 217     }
 218 }
 219
 220 void xtensa_cpu_do_interrupt(CPUState *cs)
 221 {
 222     XtensaCPU *cpu = XTENSA_CPU(cs);
 223     CPUXtensaState *env = &cpu->env;
 224
 225     if (cs->exception_index == EXC_IRQ) {
 226         qemu_log_mask(CPU_LOG_INT,
 227                 "%s(EXC_IRQ) level = %d, cintlevel = %d, "
 228                 "pc = %08x, a0 = %08x, ps = %08x, "
 229                 "intset = %08x, intenable = %08x, "
 230                 "ccount = %08x\n",
 231                 __func__, env->pending_irq_level, xtensa_get_cintlevel(env),
 232                 env->pc, env->regs[0], env->sregs[PS],
 233                 env->sregs[INTSET], env->sregs[INTENABLE],
 234                 env->sregs[CCOUNT]);
 235         handle_interrupt(env);
 236     }
 237
 238     switch (cs->exception_index) {
 239     case EXC_WINDOW_OVERFLOW4:
 240     case EXC_WINDOW_UNDERFLOW4:
 241     case EXC_WINDOW_OVERFLOW8:
 242     case EXC_WINDOW_UNDERFLOW8:
 243     case EXC_WINDOW_OVERFLOW12:
 244     case EXC_WINDOW_UNDERFLOW12:
 245     case EXC_KERNEL:
 246     case EXC_USER:
 247     case EXC_DOUBLE:
 248     case EXC_DEBUG:
 249         qemu_log_mask(CPU_LOG_INT, "%s(%d) "
 250                 "pc = %08x, a0 = %08x, ps = %08x, ccount = %08x\n",
 251                 __func__, cs->exception_index,
 252                 env->pc, env->regs[0], env->sregs[PS], env->sregs[CCOUNT]);
 253         if (env->config->exception_vector[cs->exception_index]) {
 254             env->pc = relocated_vector(env,
 255                     env->config->exception_vector[cs->exception_index]);
 256             env->exception_taken = 1;
 257         } else {
 258             qemu_log_mask(CPU_LOG_INT, "%s(pc = %08x) bad exception_index: %d\n",
 259                           __func__, env->pc, cs->exception_index);
 260         }
 261         break;
 262
 263     case EXC_IRQ:
 264         break;
 265
 266     default:
 267         qemu_log("%s(pc = %08x) unknown exception_index: %d\n",
 268                 __func__, env->pc, cs->exception_index);
 269         break;
 270     }
 271     check_interrupts(env);
 272 }
 273
 274 bool xtensa_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
 275 {
 276     if (interrupt_request & CPU_INTERRUPT_HARD) {
 277         cs->exception_index = EXC_IRQ;
 278         xtensa_cpu_do_interrupt(cs);
 279         return true;
 280     }
 281     return false;
 282 }
 283
 284 static void reset_tlb_mmu_all_ways(CPUXtensaState *env,
 285         const xtensa_tlb *tlb, xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE])
 286 {
 287     unsigned wi, ei;
 288
 289     for (wi = 0; wi < tlb->nways; ++wi) {
 290         for (ei = 0; ei < tlb->way_size[wi]; ++ei) {
 291             entry[wi][ei].asid = 0;
 292             entry[wi][ei].variable = true;
 293         }
 294     }
 295 }
 296
 297 static void reset_tlb_mmu_ways56(CPUXtensaState *env,
 298         const xtensa_tlb *tlb, xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE])
 299 {
 300     if (!tlb->varway56) {
 301         static const xtensa_tlb_entry way5[] = {
 302             {
 303                 .vaddr = 0xd0000000,
 304                 .paddr = 0,
 305                 .asid = 1,
 306                 .attr = 7,
 307                 .variable = false,
 308             }, {
 309                 .vaddr = 0xd8000000,
 310                 .paddr = 0,
 311                 .asid = 1,
 312                 .attr = 3,
 313                 .variable = false,
 314             }
 315         };
 316         static const xtensa_tlb_entry way6[] = {
 317             {
 318                 .vaddr = 0xe0000000,
 319                 .paddr = 0xf0000000,
 320                 .asid = 1,
 321                 .attr = 7,
 322                 .variable = false,
 323             }, {
 324                 .vaddr = 0xf0000000,
 325                 .paddr = 0xf0000000,
 326                 .asid = 1,
 327                 .attr = 3,
 328                 .variable = false,
 329             }
 330         };
 331         memcpy(entry[5], way5, sizeof(way5));
 332         memcpy(entry[6], way6, sizeof(way6));
 333     } else {
 334         uint32_t ei;
 335         for (ei = 0; ei < 8; ++ei) {
 336             entry[6][ei].vaddr = ei << 29;
 337             entry[6][ei].paddr = ei << 29;
 338             entry[6][ei].asid = 1;
 339             entry[6][ei].attr = 3;
 340         }
 341     }
 342 }
 343
 344 static void reset_tlb_region_way0(CPUXtensaState *env,
 345         xtensa_tlb_entry entry[][MAX_TLB_WAY_SIZE])
 346 {
 347     unsigned ei;
 348
 349     for (ei = 0; ei < 8; ++ei) {
 350         entry[0][ei].vaddr = ei << 29;
 351         entry[0][ei].paddr = ei << 29;
 352         entry[0][ei].asid = 1;
 353         entry[0][ei].attr = 2;
 354         entry[0][ei].variable = true;
 355     }
 356 }
 357
 358 void reset_mmu(CPUXtensaState *env)
 359 {
 360     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
 361         env->sregs[RASID] = 0x04030201;
 362         env->sregs[ITLBCFG] = 0;
 363         env->sregs[DTLBCFG] = 0;
 364         env->autorefill_idx = 0;
 365         reset_tlb_mmu_all_ways(env, &env->config->itlb, env->itlb);
 366         reset_tlb_mmu_all_ways(env, &env->config->dtlb, env->dtlb);
 367         reset_tlb_mmu_ways56(env, &env->config->itlb, env->itlb);
 368         reset_tlb_mmu_ways56(env, &env->config->dtlb, env->dtlb);
 369     } else {
 370         reset_tlb_region_way0(env, env->itlb);
 371         reset_tlb_region_way0(env, env->dtlb);
 372     }
 373 }
 374
 375 static unsigned get_ring(const CPUXtensaState *env, uint8_t asid)
 376 {
 377     unsigned i;
 378     for (i = 0; i < 4; ++i) {
 379         if (((env->sregs[RASID] >> i * 8) & 0xff) == asid) {
 380             return i;
 381         }
 382     }
 383     return 0xff;
 384 }
 385
 386 /*!
 387  * Lookup xtensa TLB for the given virtual address.
 388  * See ISA, 4.6.2.2
 389  *
 390  * \param pwi: [out] way index
 391  * \param pei: [out] entry index
 392  * \param pring: [out] access ring
 393  * \return 0 if ok, exception cause code otherwise
 394  */
 395 int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
 396         uint32_t *pwi, uint32_t *pei, uint8_t *pring)
 397 {
 398     const xtensa_tlb *tlb = dtlb ?
 399         &env->config->dtlb : &env->config->itlb;
 400     const xtensa_tlb_entry (*entry)[MAX_TLB_WAY_SIZE] = dtlb ?
 401         env->dtlb : env->itlb;
 402
 403     int nhits = 0;
 404     unsigned wi;
 405
 406     for (wi = 0; wi < tlb->nways; ++wi) {
 407         uint32_t vpn;
 408         uint32_t ei;
 409         split_tlb_entry_spec_way(env, addr, dtlb, &vpn, wi, &ei);
 410         if (entry[wi][ei].vaddr == vpn && entry[wi][ei].asid) {
 411             unsigned ring = get_ring(env, entry[wi][ei].asid);
 412             if (ring < 4) {
 413                 if (++nhits > 1) {
 414                     return dtlb ?
 415                         LOAD_STORE_TLB_MULTI_HIT_CAUSE :
 416                         INST_TLB_MULTI_HIT_CAUSE;
 417                 }
 418                 *pwi = wi;
 419                 *pei = ei;
 420                 *pring = ring;
 421             }
 422         }
 423     }
 424     return nhits ? 0 :
 425         (dtlb ? LOAD_STORE_TLB_MISS_CAUSE : INST_TLB_MISS_CAUSE);
 426 }
 427
 428 /*!
 429  * Convert MMU ATTR to PAGE_{READ,WRITE,EXEC} mask.
 430  * See ISA, 4.6.5.10
 431  */
 432 static unsigned mmu_attr_to_access(uint32_t attr)
 433 {
 434     unsigned access = 0;
 435
 436     if (attr < 12) {
 437         access |= PAGE_READ;
 438         if (attr & 0x1) {
 439             access |= PAGE_EXEC;
 440         }
 441         if (attr & 0x2) {
 442             access |= PAGE_WRITE;
 443         }
 444
 445         switch (attr & 0xc) {
 446         case 0:
 447             access |= PAGE_CACHE_BYPASS;
 448             break;
 449
 450         case 4:
 451             access |= PAGE_CACHE_WB;
 452             break;
 453
 454         case 8:
 455             access |= PAGE_CACHE_WT;
 456             break;
 457         }
 458     } else if (attr == 13) {
 459         access |= PAGE_READ | PAGE_WRITE | PAGE_CACHE_ISOLATE;
 460     }
 461     return access;
 462 }
 463
 464 /*!
 465  * Convert region protection ATTR to PAGE_{READ,WRITE,EXEC} mask.
 466  * See ISA, 4.6.3.3
 467  */
 468 static unsigned region_attr_to_access(uint32_t attr)
 469 {
 470     static const unsigned access[16] = {
 471          [0] = PAGE_READ | PAGE_WRITE             | PAGE_CACHE_WT,
 472          [1] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WT,
 473          [2] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_BYPASS,
 474          [3] =                          PAGE_EXEC | PAGE_CACHE_WB,
 475          [4] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WB,
 476          [5] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WB,
 477         [14] = PAGE_READ | PAGE_WRITE             | PAGE_CACHE_ISOLATE,
 478     };
 479
 480     return access[attr & 0xf];
 481 }
 482
 483 /*!
 484  * Convert cacheattr to PAGE_{READ,WRITE,EXEC} mask.
 485  * See ISA, A.2.14 The Cache Attribute Register
 486  */
 487 static unsigned cacheattr_attr_to_access(uint32_t attr)
 488 {
 489     static const unsigned access[16] = {
 490          [0] = PAGE_READ | PAGE_WRITE             | PAGE_CACHE_WT,
 491          [1] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WT,
 492          [2] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_BYPASS,
 493          [3] =                          PAGE_EXEC | PAGE_CACHE_WB,
 494          [4] = PAGE_READ | PAGE_WRITE | PAGE_EXEC | PAGE_CACHE_WB,
 495         [14] = PAGE_READ | PAGE_WRITE             | PAGE_CACHE_ISOLATE,
 496     };
 497
 498     return access[attr & 0xf];
 499 }
 500
 501 static bool is_access_granted(unsigned access, int is_write)
 502 {
 503     switch (is_write) {
 504     case 0:
 505         return access & PAGE_READ;
 506
 507     case 1:
 508         return access & PAGE_WRITE;
 509
 510     case 2:
 511         return access & PAGE_EXEC;
 512
 513     default:
 514         return 0;
 515     }
 516 }
 517
 518 static int get_pte(CPUXtensaState *env, uint32_t vaddr, uint32_t *pte);
 519
 520 static int get_physical_addr_mmu(CPUXtensaState *env, bool update_tlb,
 521         uint32_t vaddr, int is_write, int mmu_idx,
 522         uint32_t *paddr, uint32_t *page_size, unsigned *access,
 523         bool may_lookup_pt)
 524 {
 525     bool dtlb = is_write != 2;
 526     uint32_t wi;
 527     uint32_t ei;
 528     uint8_t ring;
 529     uint32_t vpn;
 530     uint32_t pte;
 531     const xtensa_tlb_entry *entry = NULL;
 532     xtensa_tlb_entry tmp_entry;
 533     int ret = xtensa_tlb_lookup(env, vaddr, dtlb, &wi, &ei, &ring);
 534
 535     if ((ret == INST_TLB_MISS_CAUSE || ret == LOAD_STORE_TLB_MISS_CAUSE) &&
 536             may_lookup_pt && get_pte(env, vaddr, &pte) == 0) {
 537         ring = (pte >> 4) & 0x3;
 538         wi = 0;
 539         split_tlb_entry_spec_way(env, vaddr, dtlb, &vpn, wi, &ei);
 540
 541         if (update_tlb) {
 542             wi = ++env->autorefill_idx & 0x3;
 543             xtensa_tlb_set_entry(env, dtlb, wi, ei, vpn, pte);
 544             env->sregs[EXCVADDR] = vaddr;
 545             qemu_log_mask(CPU_LOG_MMU, "%s: autorefill(%08x): %08x -> %08x\n",
 546                           __func__, vaddr, vpn, pte);
 547         } else {
 548             xtensa_tlb_set_entry_mmu(env, &tmp_entry, dtlb, wi, ei, vpn, pte);
 549             entry = &tmp_entry;
 550         }
 551         ret = 0;
 552     }
 553     if (ret != 0) {
 554         return ret;
 555     }
 556
 557     if (entry == NULL) {
 558         entry = xtensa_tlb_get_entry(env, dtlb, wi, ei);
 559     }
 560
 561     if (ring < mmu_idx) {
 562         return dtlb ?
 563             LOAD_STORE_PRIVILEGE_CAUSE :
 564             INST_FETCH_PRIVILEGE_CAUSE;
 565     }
 566
 567     *access = mmu_attr_to_access(entry->attr) &
 568         ~(dtlb ? PAGE_EXEC : PAGE_READ | PAGE_WRITE);
 569     if (!is_access_granted(*access, is_write)) {
 570         return dtlb ?
 571             (is_write ?
 572              STORE_PROHIBITED_CAUSE :
 573              LOAD_PROHIBITED_CAUSE) :
 574             INST_FETCH_PROHIBITED_CAUSE;
 575     }
 576
 577     *paddr = entry->paddr | (vaddr & ~xtensa_tlb_get_addr_mask(env, dtlb, wi));
 578     *page_size = ~xtensa_tlb_get_addr_mask(env, dtlb, wi) + 1;
 579
 580     return 0;
 581 }
 582
 583 static int get_pte(CPUXtensaState *env, uint32_t vaddr, uint32_t *pte)
 584 {
 585     CPUState *cs = CPU(xtensa_env_get_cpu(env));
 586     uint32_t paddr;
 587     uint32_t page_size;
 588     unsigned access;
 589     uint32_t pt_vaddr =
 590         (env->sregs[PTEVADDR] | (vaddr >> 10)) & 0xfffffffc;
 591     int ret = get_physical_addr_mmu(env, false, pt_vaddr, 0, 0,
 592             &paddr, &page_size, &access, false);
 593
 594     qemu_log_mask(CPU_LOG_MMU, "%s: trying autorefill(%08x) -> %08x\n",
 595                   __func__, vaddr, ret ? ~0 : paddr);
 596
 597     if (ret == 0) {
 598         *pte = ldl_phys(cs->as, paddr);
 599     }
 600     return ret;
 601 }
 602
 603 static int get_physical_addr_region(CPUXtensaState *env,
 604         uint32_t vaddr, int is_write, int mmu_idx,
 605         uint32_t *paddr, uint32_t *page_size, unsigned *access)
 606 {
 607     bool dtlb = is_write != 2;
 608     uint32_t wi = 0;
 609     uint32_t ei = (vaddr >> 29) & 0x7;
 610     const xtensa_tlb_entry *entry =
 611         xtensa_tlb_get_entry(env, dtlb, wi, ei);
 612
 613     *access = region_attr_to_access(entry->attr);
 614     if (!is_access_granted(*access, is_write)) {
 615         return dtlb ?
 616             (is_write ?
 617              STORE_PROHIBITED_CAUSE :
 618              LOAD_PROHIBITED_CAUSE) :
 619             INST_FETCH_PROHIBITED_CAUSE;
 620     }
 621
 622     *paddr = entry->paddr | (vaddr & ~REGION_PAGE_MASK);
 623     *page_size = ~REGION_PAGE_MASK + 1;
 624
 625     return 0;
 626 }
 627
 628 /*!
 629  * Convert virtual address to physical addr.
 630  * MMU may issue pagewalk and change xtensa autorefill TLB way entry.
 631  *
 632  * \return 0 if ok, exception cause code otherwise
 633  */
 634 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
 635         uint32_t vaddr, int is_write, int mmu_idx,
 636         uint32_t *paddr, uint32_t *page_size, unsigned *access)
 637 {
 638     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
 639         return get_physical_addr_mmu(env, update_tlb,
 640                 vaddr, is_write, mmu_idx, paddr, page_size, access, true);
 641     } else if (xtensa_option_bits_enabled(env->config,
 642                 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_PROTECTION) |
 643                 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_TRANSLATION))) {
 644         return get_physical_addr_region(env, vaddr, is_write, mmu_idx,
 645                 paddr, page_size, access);
 646     } else {
 647         *paddr = vaddr;
 648         *page_size = TARGET_PAGE_SIZE;
 649         *access = cacheattr_attr_to_access(
 650                 env->sregs[CACHEATTR] >> ((vaddr & 0xe0000000) >> 27));
 651         return 0;
 652     }
 653 }
 654
 655 static void dump_tlb(FILE *f, fprintf_function cpu_fprintf,
 656         CPUXtensaState *env, bool dtlb)
 657 {
 658     unsigned wi, ei;
 659     const xtensa_tlb *conf =
 660         dtlb ? &env->config->dtlb : &env->config->itlb;
 661     unsigned (*attr_to_access)(uint32_t) =
 662         xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) ?
 663         mmu_attr_to_access : region_attr_to_access;
 664
 665     for (wi = 0; wi < conf->nways; ++wi) {
 666         uint32_t sz = ~xtensa_tlb_get_addr_mask(env, dtlb, wi) + 1;
 667         const char *sz_text;
 668         bool print_header = true;
 669
 670         if (sz >= 0x100000) {
 671             sz >>= 20;
 672             sz_text = "MB";
 673         } else {
 674             sz >>= 10;
 675             sz_text = "KB";
 676         }
 677
 678         for (ei = 0; ei < conf->way_size[wi]; ++ei) {
 679             const xtensa_tlb_entry *entry =
 680                 xtensa_tlb_get_entry(env, dtlb, wi, ei);
 681
 682             if (entry->asid) {
 683                 static const char * const cache_text[8] = {
 684                     [PAGE_CACHE_BYPASS >> PAGE_CACHE_SHIFT] = "Bypass",
 685                     [PAGE_CACHE_WT >> PAGE_CACHE_SHIFT] = "WT",
 686                     [PAGE_CACHE_WB >> PAGE_CACHE_SHIFT] = "WB",
 687                     [PAGE_CACHE_ISOLATE >> PAGE_CACHE_SHIFT] = "Isolate",
 688                 };
 689                 unsigned access = attr_to_access(entry->attr);
 690                 unsigned cache_idx = (access & PAGE_CACHE_MASK) >>
 691                     PAGE_CACHE_SHIFT;
 692
 693                 if (print_header) {
 694                     print_header = false;
 695                     cpu_fprintf(f, "Way %u (%d %s)\n", wi, sz, sz_text);
 696                     cpu_fprintf(f,
 697                             "\tVaddr       Paddr       ASID  Attr RWX Cache\n"
 698                             "\t----------  ----------  ----  ---- --- -------\n");
 699                 }
 700                 cpu_fprintf(f,
 701                         "\t0x%08x  0x%08x  0x%02x  0x%02x %c%c%c %-7s\n",
 702                         entry->vaddr,
 703                         entry->paddr,
 704                         entry->asid,
 705                         entry->attr,
 706                         (access & PAGE_READ) ? 'R' : '-',
 707                         (access & PAGE_WRITE) ? 'W' : '-',
 708                         (access & PAGE_EXEC) ? 'X' : '-',
 709                         cache_text[cache_idx] ? cache_text[cache_idx] :
 710                             "Invalid");
 711             }
 712         }
 713     }
 714 }
 715
 716 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env)
 717 {
 718     if (xtensa_option_bits_enabled(env->config,
 719                 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_PROTECTION) |
 720                 XTENSA_OPTION_BIT(XTENSA_OPTION_REGION_TRANSLATION) |
 721                 XTENSA_OPTION_BIT(XTENSA_OPTION_MMU))) {
 722
 723         cpu_fprintf(f, "ITLB:\n");
 724         dump_tlb(f, cpu_fprintf, env, false);
 725         cpu_fprintf(f, "\nDTLB:\n");
 726         dump_tlb(f, cpu_fprintf, env, true);
 727     } else {
 728         cpu_fprintf(f, "No TLB for this CPU core\n");
 729     }
 730 }