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_loop_exit_noexc(cs); 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 } 731 732 void xtensa_runstall(CPUXtensaState *env, bool runstall) 733 { 734 CPUState *cpu = CPU(xtensa_env_get_cpu(env)); 735 736 env->runstall = runstall; 737 cpu->halted = runstall; 738 if (runstall) { 739 cpu_interrupt(cpu, CPU_INTERRUPT_HALT); 740 } else { 741 cpu_reset_interrupt(cpu, CPU_INTERRUPT_HALT); 742 } 743 } 744