target/sparc/mmu_helper.c

   1 /*
   2  *  Sparc MMU helpers
   3  *
   4  *  Copyright (c) 2003-2005 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "cpu.h"
  22 #include "exec/exec-all.h"
  23 #include "trace.h"
  24 #include "exec/address-spaces.h"
  25
  26 /* Sparc MMU emulation */
  27
  28 #if defined(CONFIG_USER_ONLY)
  29
  30 int sparc_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
  31                                int mmu_idx)
  32 {
  33     if (rw & 2) {
  34         cs->exception_index = TT_TFAULT;
  35     } else {
  36         cs->exception_index = TT_DFAULT;
  37     }
  38     return 1;
  39 }
  40
  41 #else
  42
  43 #ifndef TARGET_SPARC64
  44 /*
  45  * Sparc V8 Reference MMU (SRMMU)
  46  */
  47 static const int access_table[8][8] = {
  48     { 0, 0, 0, 0, 8, 0, 12, 12 },
  49     { 0, 0, 0, 0, 8, 0, 0, 0 },
  50     { 8, 8, 0, 0, 0, 8, 12, 12 },
  51     { 8, 8, 0, 0, 0, 8, 0, 0 },
  52     { 8, 0, 8, 0, 8, 8, 12, 12 },
  53     { 8, 0, 8, 0, 8, 0, 8, 0 },
  54     { 8, 8, 8, 0, 8, 8, 12, 12 },
  55     { 8, 8, 8, 0, 8, 8, 8, 0 }
  56 };
  57
  58 static const int perm_table[2][8] = {
  59     {
  60         PAGE_READ,
  61         PAGE_READ | PAGE_WRITE,
  62         PAGE_READ | PAGE_EXEC,
  63         PAGE_READ | PAGE_WRITE | PAGE_EXEC,
  64         PAGE_EXEC,
  65         PAGE_READ | PAGE_WRITE,
  66         PAGE_READ | PAGE_EXEC,
  67         PAGE_READ | PAGE_WRITE | PAGE_EXEC
  68     },
  69     {
  70         PAGE_READ,
  71         PAGE_READ | PAGE_WRITE,
  72         PAGE_READ | PAGE_EXEC,
  73         PAGE_READ | PAGE_WRITE | PAGE_EXEC,
  74         PAGE_EXEC,
  75         PAGE_READ,
  76         0,
  77         0,
  78     }
  79 };
  80
  81 static int get_physical_address(CPUSPARCState *env, hwaddr *physical,
  82                                 int *prot, int *access_index,
  83                                 target_ulong address, int rw, int mmu_idx,
  84                                 target_ulong *page_size)
  85 {
  86     int access_perms = 0;
  87     hwaddr pde_ptr;
  88     uint32_t pde;
  89     int error_code = 0, is_dirty, is_user;
  90     unsigned long page_offset;
  91     CPUState *cs = CPU(sparc_env_get_cpu(env));
  92
  93     is_user = mmu_idx == MMU_USER_IDX;
  94
  95     if (mmu_idx == MMU_PHYS_IDX) {
  96         *page_size = TARGET_PAGE_SIZE;
  97         /* Boot mode: instruction fetches are taken from PROM */
  98         if (rw == 2 && (env->mmuregs[0] & env->def->mmu_bm)) {
  99             *physical = env->prom_addr | (address & 0x7ffffULL);
 100             *prot = PAGE_READ | PAGE_EXEC;
 101             return 0;
 102         }
 103         *physical = address;
 104         *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
 105         return 0;
 106     }
 107
 108     *access_index = ((rw & 1) << 2) | (rw & 2) | (is_user ? 0 : 1);
 109     *physical = 0xffffffffffff0000ULL;
 110
 111     /* SPARC reference MMU table walk: Context table->L1->L2->PTE */
 112     /* Context base + context number */
 113     pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2);
 114     pde = ldl_phys(cs->as, pde_ptr);
 115
 116     /* Ctx pde */
 117     switch (pde & PTE_ENTRYTYPE_MASK) {
 118     default:
 119     case 0: /* Invalid */
 120         return 1 << 2;
 121     case 2: /* L0 PTE, maybe should not happen? */
 122     case 3: /* Reserved */
 123         return 4 << 2;
 124     case 1: /* L0 PDE */
 125         pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4);
 126         pde = ldl_phys(cs->as, pde_ptr);
 127
 128         switch (pde & PTE_ENTRYTYPE_MASK) {
 129         default:
 130         case 0: /* Invalid */
 131             return (1 << 8) | (1 << 2);
 132         case 3: /* Reserved */
 133             return (1 << 8) | (4 << 2);
 134         case 1: /* L1 PDE */
 135             pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4);
 136             pde = ldl_phys(cs->as, pde_ptr);
 137
 138             switch (pde & PTE_ENTRYTYPE_MASK) {
 139             default:
 140             case 0: /* Invalid */
 141                 return (2 << 8) | (1 << 2);
 142             case 3: /* Reserved */
 143                 return (2 << 8) | (4 << 2);
 144             case 1: /* L2 PDE */
 145                 pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4);
 146                 pde = ldl_phys(cs->as, pde_ptr);
 147
 148                 switch (pde & PTE_ENTRYTYPE_MASK) {
 149                 default:
 150                 case 0: /* Invalid */
 151                     return (3 << 8) | (1 << 2);
 152                 case 1: /* PDE, should not happen */
 153                 case 3: /* Reserved */
 154                     return (3 << 8) | (4 << 2);
 155                 case 2: /* L3 PTE */
 156                     page_offset = 0;
 157                 }
 158                 *page_size = TARGET_PAGE_SIZE;
 159                 break;
 160             case 2: /* L2 PTE */
 161                 page_offset = address & 0x3f000;
 162                 *page_size = 0x40000;
 163             }
 164             break;
 165         case 2: /* L1 PTE */
 166             page_offset = address & 0xfff000;
 167             *page_size = 0x1000000;
 168         }
 169     }
 170
 171     /* check access */
 172     access_perms = (pde & PTE_ACCESS_MASK) >> PTE_ACCESS_SHIFT;
 173     error_code = access_table[*access_index][access_perms];
 174     if (error_code && !((env->mmuregs[0] & MMU_NF) && is_user)) {
 175         return error_code;
 176     }
 177
 178     /* update page modified and dirty bits */
 179     is_dirty = (rw & 1) && !(pde & PG_MODIFIED_MASK);
 180     if (!(pde & PG_ACCESSED_MASK) || is_dirty) {
 181         pde |= PG_ACCESSED_MASK;
 182         if (is_dirty) {
 183             pde |= PG_MODIFIED_MASK;
 184         }
 185         stl_phys_notdirty(cs->as, pde_ptr, pde);
 186     }
 187
 188     /* the page can be put in the TLB */
 189     *prot = perm_table[is_user][access_perms];
 190     if (!(pde & PG_MODIFIED_MASK)) {
 191         /* only set write access if already dirty... otherwise wait
 192            for dirty access */
 193         *prot &= ~PAGE_WRITE;
 194     }
 195
 196     /* Even if large ptes, we map only one 4KB page in the cache to
 197        avoid filling it too fast */
 198     *physical = ((hwaddr)(pde & PTE_ADDR_MASK) << 4) + page_offset;
 199     return error_code;
 200 }
 201
 202 /* Perform address translation */
 203 int sparc_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
 204                                int mmu_idx)
 205 {
 206     SPARCCPU *cpu = SPARC_CPU(cs);
 207     CPUSPARCState *env = &cpu->env;
 208     hwaddr paddr;
 209     target_ulong vaddr;
 210     target_ulong page_size;
 211     int error_code = 0, prot, access_index;
 212
 213     address &= TARGET_PAGE_MASK;
 214     error_code = get_physical_address(env, &paddr, &prot, &access_index,
 215                                       address, rw, mmu_idx, &page_size);
 216     vaddr = address;
 217     if (error_code == 0) {
 218         qemu_log_mask(CPU_LOG_MMU,
 219                 "Translate at %" VADDR_PRIx " -> " TARGET_FMT_plx ", vaddr "
 220                 TARGET_FMT_lx "\n", address, paddr, vaddr);
 221         tlb_set_page(cs, vaddr, paddr, prot, mmu_idx, page_size);
 222         return 0;
 223     }
 224
 225     if (env->mmuregs[3]) { /* Fault status register */
 226         env->mmuregs[3] = 1; /* overflow (not read before another fault) */
 227     }
 228     env->mmuregs[3] |= (access_index << 5) | error_code | 2;
 229     env->mmuregs[4] = address; /* Fault address register */
 230
 231     if ((env->mmuregs[0] & MMU_NF) || env->psret == 0)  {
 232         /* No fault mode: if a mapping is available, just override
 233            permissions. If no mapping is available, redirect accesses to
 234            neverland. Fake/overridden mappings will be flushed when
 235            switching to normal mode. */
 236         prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
 237         tlb_set_page(cs, vaddr, paddr, prot, mmu_idx, TARGET_PAGE_SIZE);
 238         return 0;
 239     } else {
 240         if (rw & 2) {
 241             cs->exception_index = TT_TFAULT;
 242         } else {
 243             cs->exception_index = TT_DFAULT;
 244         }
 245         return 1;
 246     }
 247 }
 248
 249 target_ulong mmu_probe(CPUSPARCState *env, target_ulong address, int mmulev)
 250 {
 251     CPUState *cs = CPU(sparc_env_get_cpu(env));
 252     hwaddr pde_ptr;
 253     uint32_t pde;
 254
 255     /* Context base + context number */
 256     pde_ptr = (hwaddr)(env->mmuregs[1] << 4) +
 257         (env->mmuregs[2] << 2);
 258     pde = ldl_phys(cs->as, pde_ptr);
 259
 260     switch (pde & PTE_ENTRYTYPE_MASK) {
 261     default:
 262     case 0: /* Invalid */
 263     case 2: /* PTE, maybe should not happen? */
 264     case 3: /* Reserved */
 265         return 0;
 266     case 1: /* L1 PDE */
 267         if (mmulev == 3) {
 268             return pde;
 269         }
 270         pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4);
 271         pde = ldl_phys(cs->as, pde_ptr);
 272
 273         switch (pde & PTE_ENTRYTYPE_MASK) {
 274         default:
 275         case 0: /* Invalid */
 276         case 3: /* Reserved */
 277             return 0;
 278         case 2: /* L1 PTE */
 279             return pde;
 280         case 1: /* L2 PDE */
 281             if (mmulev == 2) {
 282                 return pde;
 283             }
 284             pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4);
 285             pde = ldl_phys(cs->as, pde_ptr);
 286
 287             switch (pde & PTE_ENTRYTYPE_MASK) {
 288             default:
 289             case 0: /* Invalid */
 290             case 3: /* Reserved */
 291                 return 0;
 292             case 2: /* L2 PTE */
 293                 return pde;
 294             case 1: /* L3 PDE */
 295                 if (mmulev == 1) {
 296                     return pde;
 297                 }
 298                 pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4);
 299                 pde = ldl_phys(cs->as, pde_ptr);
 300
 301                 switch (pde & PTE_ENTRYTYPE_MASK) {
 302                 default:
 303                 case 0: /* Invalid */
 304                 case 1: /* PDE, should not happen */
 305                 case 3: /* Reserved */
 306                     return 0;
 307                 case 2: /* L3 PTE */
 308                     return pde;
 309                 }
 310             }
 311         }
 312     }
 313     return 0;
 314 }
 315
 316 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUSPARCState *env)
 317 {
 318     CPUState *cs = CPU(sparc_env_get_cpu(env));
 319     target_ulong va, va1, va2;
 320     unsigned int n, m, o;
 321     hwaddr pde_ptr, pa;
 322     uint32_t pde;
 323
 324     pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2);
 325     pde = ldl_phys(cs->as, pde_ptr);
 326     (*cpu_fprintf)(f, "Root ptr: " TARGET_FMT_plx ", ctx: %d\n",
 327                    (hwaddr)env->mmuregs[1] << 4, env->mmuregs[2]);
 328     for (n = 0, va = 0; n < 256; n++, va += 16 * 1024 * 1024) {
 329         pde = mmu_probe(env, va, 2);
 330         if (pde) {
 331             pa = cpu_get_phys_page_debug(cs, va);
 332             (*cpu_fprintf)(f, "VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_plx
 333                            " PDE: " TARGET_FMT_lx "\n", va, pa, pde);
 334             for (m = 0, va1 = va; m < 64; m++, va1 += 256 * 1024) {
 335                 pde = mmu_probe(env, va1, 1);
 336                 if (pde) {
 337                     pa = cpu_get_phys_page_debug(cs, va1);
 338                     (*cpu_fprintf)(f, " VA: " TARGET_FMT_lx ", PA: "
 339                                    TARGET_FMT_plx " PDE: " TARGET_FMT_lx "\n",
 340                                    va1, pa, pde);
 341                     for (o = 0, va2 = va1; o < 64; o++, va2 += 4 * 1024) {
 342                         pde = mmu_probe(env, va2, 0);
 343                         if (pde) {
 344                             pa = cpu_get_phys_page_debug(cs, va2);
 345                             (*cpu_fprintf)(f, "  VA: " TARGET_FMT_lx ", PA: "
 346                                            TARGET_FMT_plx " PTE: "
 347                                            TARGET_FMT_lx "\n",
 348                                            va2, pa, pde);
 349                         }
 350                     }
 351                 }
 352             }
 353         }
 354     }
 355 }
 356
 357 /* Gdb expects all registers windows to be flushed in ram. This function handles
 358  * reads (and only reads) in stack frames as if windows were flushed. We assume
 359  * that the sparc ABI is followed.
 360  */
 361 int sparc_cpu_memory_rw_debug(CPUState *cs, vaddr address,
 362                               uint8_t *buf, int len, bool is_write)
 363 {
 364     SPARCCPU *cpu = SPARC_CPU(cs);
 365     CPUSPARCState *env = &cpu->env;
 366     target_ulong addr = address;
 367     int i;
 368     int len1;
 369     int cwp = env->cwp;
 370
 371     if (!is_write) {
 372         for (i = 0; i < env->nwindows; i++) {
 373             int off;
 374             target_ulong fp = env->regbase[cwp * 16 + 22];
 375
 376             /* Assume fp == 0 means end of frame.  */
 377             if (fp == 0) {
 378                 break;
 379             }
 380
 381             cwp = cpu_cwp_inc(env, cwp + 1);
 382
 383             /* Invalid window ? */
 384             if (env->wim & (1 << cwp)) {
 385                 break;
 386             }
 387
 388             /* According to the ABI, the stack is growing downward.  */
 389             if (addr + len < fp) {
 390                 break;
 391             }
 392
 393             /* Not in this frame.  */
 394             if (addr > fp + 64) {
 395                 continue;
 396             }
 397
 398             /* Handle access before this window.  */
 399             if (addr < fp) {
 400                 len1 = fp - addr;
 401                 if (cpu_memory_rw_debug(cs, addr, buf, len1, is_write) != 0) {
 402                     return -1;
 403                 }
 404                 addr += len1;
 405                 len -= len1;
 406                 buf += len1;
 407             }
 408
 409             /* Access byte per byte to registers. Not very efficient but speed
 410              * is not critical.
 411              */
 412             off = addr - fp;
 413             len1 = 64 - off;
 414
 415             if (len1 > len) {
 416                 len1 = len;
 417             }
 418
 419             for (; len1; len1--) {
 420                 int reg = cwp * 16 + 8 + (off >> 2);
 421                 union {
 422                     uint32_t v;
 423                     uint8_t c[4];
 424                 } u;
 425                 u.v = cpu_to_be32(env->regbase[reg]);
 426                 *buf++ = u.c[off & 3];
 427                 addr++;
 428                 len--;
 429                 off++;
 430             }
 431
 432             if (len == 0) {
 433                 return 0;
 434             }
 435         }
 436     }
 437     return cpu_memory_rw_debug(cs, addr, buf, len, is_write);
 438 }
 439
 440 #else /* !TARGET_SPARC64 */
 441
 442 /* 41 bit physical address space */
 443 static inline hwaddr ultrasparc_truncate_physical(uint64_t x)
 444 {
 445     return x & 0x1ffffffffffULL;
 446 }
 447
 448 /*
 449  * UltraSparc IIi I/DMMUs
 450  */
 451
 452 /* Returns true if TTE tag is valid and matches virtual address value
 453    in context requires virtual address mask value calculated from TTE
 454    entry size */
 455 static inline int ultrasparc_tag_match(SparcTLBEntry *tlb,
 456                                        uint64_t address, uint64_t context,
 457                                        hwaddr *physical)
 458 {
 459     uint64_t mask = -(8192ULL << 3 * TTE_PGSIZE(tlb->tte));
 460
 461     /* valid, context match, virtual address match? */
 462     if (TTE_IS_VALID(tlb->tte) &&
 463         (TTE_IS_GLOBAL(tlb->tte) || tlb_compare_context(tlb, context))
 464         && compare_masked(address, tlb->tag, mask)) {
 465         /* decode physical address */
 466         *physical = ((tlb->tte & mask) | (address & ~mask)) & 0x1ffffffe000ULL;
 467         return 1;
 468     }
 469
 470     return 0;
 471 }
 472
 473 static int get_physical_address_data(CPUSPARCState *env,
 474                                      hwaddr *physical, int *prot,
 475                                      target_ulong address, int rw, int mmu_idx)
 476 {
 477     CPUState *cs = CPU(sparc_env_get_cpu(env));
 478     unsigned int i;
 479     uint64_t context;
 480     uint64_t sfsr = 0;
 481     bool is_user = false;
 482
 483     switch (mmu_idx) {
 484     case MMU_PHYS_IDX:
 485         g_assert_not_reached();
 486     case MMU_USER_IDX:
 487         is_user = true;
 488         /* fallthru */
 489     case MMU_KERNEL_IDX:
 490         context = env->dmmu.mmu_primary_context & 0x1fff;
 491         sfsr |= SFSR_CT_PRIMARY;
 492         break;
 493     case MMU_USER_SECONDARY_IDX:
 494         is_user = true;
 495         /* fallthru */
 496     case MMU_KERNEL_SECONDARY_IDX:
 497         context = env->dmmu.mmu_secondary_context & 0x1fff;
 498         sfsr |= SFSR_CT_SECONDARY;
 499         break;
 500     case MMU_NUCLEUS_IDX:
 501         sfsr |= SFSR_CT_NUCLEUS;
 502         /* FALLTHRU */
 503     default:
 504         context = 0;
 505         break;
 506     }
 507
 508     if (rw == 1) {
 509         sfsr |= SFSR_WRITE_BIT;
 510     } else if (rw == 4) {
 511         sfsr |= SFSR_NF_BIT;
 512     }
 513
 514     for (i = 0; i < 64; i++) {
 515         /* ctx match, vaddr match, valid? */
 516         if (ultrasparc_tag_match(&env->dtlb[i], address, context, physical)) {
 517             int do_fault = 0;
 518
 519             /* access ok? */
 520             /* multiple bits in SFSR.FT may be set on TT_DFAULT */
 521             if (TTE_IS_PRIV(env->dtlb[i].tte) && is_user) {
 522                 do_fault = 1;
 523                 sfsr |= SFSR_FT_PRIV_BIT; /* privilege violation */
 524                 trace_mmu_helper_dfault(address, context, mmu_idx, env->tl);
 525             }
 526             if (rw == 4) {
 527                 if (TTE_IS_SIDEEFFECT(env->dtlb[i].tte)) {
 528                     do_fault = 1;
 529                     sfsr |= SFSR_FT_NF_E_BIT;
 530                 }
 531             } else {
 532                 if (TTE_IS_NFO(env->dtlb[i].tte)) {
 533                     do_fault = 1;
 534                     sfsr |= SFSR_FT_NFO_BIT;
 535                 }
 536             }
 537
 538             if (do_fault) {
 539                 /* faults above are reported with TT_DFAULT. */
 540                 cs->exception_index = TT_DFAULT;
 541             } else if (!TTE_IS_W_OK(env->dtlb[i].tte) && (rw == 1)) {
 542                 do_fault = 1;
 543                 cs->exception_index = TT_DPROT;
 544
 545                 trace_mmu_helper_dprot(address, context, mmu_idx, env->tl);
 546             }
 547
 548             if (!do_fault) {
 549                 *prot = PAGE_READ;
 550                 if (TTE_IS_W_OK(env->dtlb[i].tte)) {
 551                     *prot |= PAGE_WRITE;
 552                 }
 553
 554                 TTE_SET_USED(env->dtlb[i].tte);
 555
 556                 return 0;
 557             }
 558
 559             if (env->dmmu.sfsr & SFSR_VALID_BIT) { /* Fault status register */
 560                 sfsr |= SFSR_OW_BIT; /* overflow (not read before
 561                                         another fault) */
 562             }
 563
 564             if (env->pstate & PS_PRIV) {
 565                 sfsr |= SFSR_PR_BIT;
 566             }
 567
 568             /* FIXME: ASI field in SFSR must be set */
 569             env->dmmu.sfsr = sfsr | SFSR_VALID_BIT;
 570
 571             env->dmmu.sfar = address; /* Fault address register */
 572
 573             env->dmmu.tag_access = (address & ~0x1fffULL) | context;
 574
 575             return 1;
 576         }
 577     }
 578
 579     trace_mmu_helper_dmiss(address, context);
 580
 581     /*
 582      * On MMU misses:
 583      * - UltraSPARC IIi: SFSR and SFAR unmodified
 584      * - JPS1: SFAR updated and some fields of SFSR updated
 585      */
 586     env->dmmu.tag_access = (address & ~0x1fffULL) | context;
 587     cs->exception_index = TT_DMISS;
 588     return 1;
 589 }
 590
 591 static int get_physical_address_code(CPUSPARCState *env,
 592                                      hwaddr *physical, int *prot,
 593                                      target_ulong address, int mmu_idx)
 594 {
 595     CPUState *cs = CPU(sparc_env_get_cpu(env));
 596     unsigned int i;
 597     uint64_t context;
 598     bool is_user = false;
 599
 600     switch (mmu_idx) {
 601     case MMU_PHYS_IDX:
 602     case MMU_USER_SECONDARY_IDX:
 603     case MMU_KERNEL_SECONDARY_IDX:
 604         g_assert_not_reached();
 605     case MMU_USER_IDX:
 606         is_user = true;
 607         /* fallthru */
 608     case MMU_KERNEL_IDX:
 609         context = env->dmmu.mmu_primary_context & 0x1fff;
 610         break;
 611     default:
 612         context = 0;
 613         break;
 614     }
 615
 616     if (env->tl == 0) {
 617         /* PRIMARY context */
 618         context = env->dmmu.mmu_primary_context & 0x1fff;
 619     } else {
 620         /* NUCLEUS context */
 621         context = 0;
 622     }
 623
 624     for (i = 0; i < 64; i++) {
 625         /* ctx match, vaddr match, valid? */
 626         if (ultrasparc_tag_match(&env->itlb[i],
 627                                  address, context, physical)) {
 628             /* access ok? */
 629             if (TTE_IS_PRIV(env->itlb[i].tte) && is_user) {
 630                 /* Fault status register */
 631                 if (env->immu.sfsr & SFSR_VALID_BIT) {
 632                     env->immu.sfsr = SFSR_OW_BIT; /* overflow (not read before
 633                                                      another fault) */
 634                 } else {
 635                     env->immu.sfsr = 0;
 636                 }
 637                 if (env->pstate & PS_PRIV) {
 638                     env->immu.sfsr |= SFSR_PR_BIT;
 639                 }
 640                 if (env->tl > 0) {
 641                     env->immu.sfsr |= SFSR_CT_NUCLEUS;
 642                 }
 643
 644                 /* FIXME: ASI field in SFSR must be set */
 645                 env->immu.sfsr |= SFSR_FT_PRIV_BIT | SFSR_VALID_BIT;
 646                 cs->exception_index = TT_TFAULT;
 647
 648                 env->immu.tag_access = (address & ~0x1fffULL) | context;
 649
 650                 trace_mmu_helper_tfault(address, context);
 651
 652                 return 1;
 653             }
 654             *prot = PAGE_EXEC;
 655             TTE_SET_USED(env->itlb[i].tte);
 656             return 0;
 657         }
 658     }
 659
 660     trace_mmu_helper_tmiss(address, context);
 661
 662     /* Context is stored in DMMU (dmmuregs[1]) also for IMMU */
 663     env->immu.tag_access = (address & ~0x1fffULL) | context;
 664     cs->exception_index = TT_TMISS;
 665     return 1;
 666 }
 667
 668 static int get_physical_address(CPUSPARCState *env, hwaddr *physical,
 669                                 int *prot, int *access_index,
 670                                 target_ulong address, int rw, int mmu_idx,
 671                                 target_ulong *page_size)
 672 {
 673     /* ??? We treat everything as a small page, then explicitly flush
 674        everything when an entry is evicted.  */
 675     *page_size = TARGET_PAGE_SIZE;
 676
 677     /* safety net to catch wrong softmmu index use from dynamic code */
 678     if (env->tl > 0 && mmu_idx != MMU_NUCLEUS_IDX) {
 679         if (rw == 2) {
 680             trace_mmu_helper_get_phys_addr_code(env->tl, mmu_idx,
 681                                                 env->dmmu.mmu_primary_context,
 682                                                 env->dmmu.mmu_secondary_context,
 683                                                 address);
 684         } else {
 685             trace_mmu_helper_get_phys_addr_data(env->tl, mmu_idx,
 686                                                 env->dmmu.mmu_primary_context,
 687                                                 env->dmmu.mmu_secondary_context,
 688                                                 address);
 689         }
 690     }
 691
 692     if (mmu_idx == MMU_PHYS_IDX) {
 693         *physical = ultrasparc_truncate_physical(address);
 694         *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
 695         return 0;
 696     }
 697
 698     if (rw == 2) {
 699         return get_physical_address_code(env, physical, prot, address,
 700                                          mmu_idx);
 701     } else {
 702         return get_physical_address_data(env, physical, prot, address, rw,
 703                                          mmu_idx);
 704     }
 705 }
 706
 707 /* Perform address translation */
 708 int sparc_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
 709                                int mmu_idx)
 710 {
 711     SPARCCPU *cpu = SPARC_CPU(cs);
 712     CPUSPARCState *env = &cpu->env;
 713     target_ulong vaddr;
 714     hwaddr paddr;
 715     target_ulong page_size;
 716     int error_code = 0, prot, access_index;
 717
 718     address &= TARGET_PAGE_MASK;
 719     error_code = get_physical_address(env, &paddr, &prot, &access_index,
 720                                       address, rw, mmu_idx, &page_size);
 721     if (error_code == 0) {
 722         vaddr = address;
 723
 724         trace_mmu_helper_mmu_fault(address, paddr, mmu_idx, env->tl,
 725                                    env->dmmu.mmu_primary_context,
 726                                    env->dmmu.mmu_secondary_context);
 727
 728         tlb_set_page(cs, vaddr, paddr, prot, mmu_idx, page_size);
 729         return 0;
 730     }
 731     /* XXX */
 732     return 1;
 733 }
 734
 735 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUSPARCState *env)
 736 {
 737     unsigned int i;
 738     const char *mask;
 739
 740     (*cpu_fprintf)(f, "MMU contexts: Primary: %" PRId64 ", Secondary: %"
 741                    PRId64 "\n",
 742                    env->dmmu.mmu_primary_context,
 743                    env->dmmu.mmu_secondary_context);
 744     (*cpu_fprintf)(f, "DMMU Tag Access: %" PRIx64 ", TSB Tag Target: %" PRIx64
 745                    "\n", env->dmmu.tag_access, env->dmmu.tsb_tag_target);
 746     if ((env->lsu & DMMU_E) == 0) {
 747         (*cpu_fprintf)(f, "DMMU disabled\n");
 748     } else {
 749         (*cpu_fprintf)(f, "DMMU dump\n");
 750         for (i = 0; i < 64; i++) {
 751             switch (TTE_PGSIZE(env->dtlb[i].tte)) {
 752             default:
 753             case 0x0:
 754                 mask = "  8k";
 755                 break;
 756             case 0x1:
 757                 mask = " 64k";
 758                 break;
 759             case 0x2:
 760                 mask = "512k";
 761                 break;
 762             case 0x3:
 763                 mask = "  4M";
 764                 break;
 765             }
 766             if (TTE_IS_VALID(env->dtlb[i].tte)) {
 767                 (*cpu_fprintf)(f, "[%02u] VA: %" PRIx64 ", PA: %llx"
 768                                ", %s, %s, %s, %s, ctx %" PRId64 " %s\n",
 769                                i,
 770                                env->dtlb[i].tag & (uint64_t)~0x1fffULL,
 771                                TTE_PA(env->dtlb[i].tte),
 772                                mask,
 773                                TTE_IS_PRIV(env->dtlb[i].tte) ? "priv" : "user",
 774                                TTE_IS_W_OK(env->dtlb[i].tte) ? "RW" : "RO",
 775                                TTE_IS_LOCKED(env->dtlb[i].tte) ?
 776                                "locked" : "unlocked",
 777                                env->dtlb[i].tag & (uint64_t)0x1fffULL,
 778                                TTE_IS_GLOBAL(env->dtlb[i].tte) ?
 779                                "global" : "local");
 780             }
 781         }
 782     }
 783     if ((env->lsu & IMMU_E) == 0) {
 784         (*cpu_fprintf)(f, "IMMU disabled\n");
 785     } else {
 786         (*cpu_fprintf)(f, "IMMU dump\n");
 787         for (i = 0; i < 64; i++) {
 788             switch (TTE_PGSIZE(env->itlb[i].tte)) {
 789             default:
 790             case 0x0:
 791                 mask = "  8k";
 792                 break;
 793             case 0x1:
 794                 mask = " 64k";
 795                 break;
 796             case 0x2:
 797                 mask = "512k";
 798                 break;
 799             case 0x3:
 800                 mask = "  4M";
 801                 break;
 802             }
 803             if (TTE_IS_VALID(env->itlb[i].tte)) {
 804                 (*cpu_fprintf)(f, "[%02u] VA: %" PRIx64 ", PA: %llx"
 805                                ", %s, %s, %s, ctx %" PRId64 " %s\n",
 806                                i,
 807                                env->itlb[i].tag & (uint64_t)~0x1fffULL,
 808                                TTE_PA(env->itlb[i].tte),
 809                                mask,
 810                                TTE_IS_PRIV(env->itlb[i].tte) ? "priv" : "user",
 811                                TTE_IS_LOCKED(env->itlb[i].tte) ?
 812                                "locked" : "unlocked",
 813                                env->itlb[i].tag & (uint64_t)0x1fffULL,
 814                                TTE_IS_GLOBAL(env->itlb[i].tte) ?
 815                                "global" : "local");
 816             }
 817         }
 818     }
 819 }
 820
 821 #endif /* TARGET_SPARC64 */
 822
 823 static int cpu_sparc_get_phys_page(CPUSPARCState *env, hwaddr *phys,
 824                                    target_ulong addr, int rw, int mmu_idx)
 825 {
 826     target_ulong page_size;
 827     int prot, access_index;
 828
 829     return get_physical_address(env, phys, &prot, &access_index, addr, rw,
 830                                 mmu_idx, &page_size);
 831 }
 832
 833 #if defined(TARGET_SPARC64)
 834 hwaddr cpu_get_phys_page_nofault(CPUSPARCState *env, target_ulong addr,
 835                                            int mmu_idx)
 836 {
 837     hwaddr phys_addr;
 838
 839     if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 4, mmu_idx) != 0) {
 840         return -1;
 841     }
 842     return phys_addr;
 843 }
 844 #endif
 845
 846 hwaddr sparc_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
 847 {
 848     SPARCCPU *cpu = SPARC_CPU(cs);
 849     CPUSPARCState *env = &cpu->env;
 850     hwaddr phys_addr;
 851     int mmu_idx = cpu_mmu_index(env, false);
 852     MemoryRegionSection section;
 853
 854     if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 2, mmu_idx) != 0) {
 855         if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 0, mmu_idx) != 0) {
 856             return -1;
 857         }
 858     }
 859     section = memory_region_find(get_system_memory(), phys_addr, 1);
 860     memory_region_unref(section.mr);
 861     if (!int128_nz(section.size)) {
 862         return -1;
 863     }
 864     return phys_addr;
 865 }
 866 #endif