target-sh4/helper.c

   1 /*
   2  *  SH4 emulation
   3  *
   4  *  Copyright (c) 2005 Samuel Tardieu
   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 #include <stdarg.h>
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <inttypes.h>
  24 #include <signal.h>
  25
  26 #include "cpu.h"
  27
  28 #if !defined(CONFIG_USER_ONLY)
  29 #include "hw/sh_intc.h"
  30 #endif
  31
  32 #if defined(CONFIG_USER_ONLY)
  33
  34 void do_interrupt (CPUState *env)
  35 {
  36   env->exception_index = -1;
  37 }
  38
  39 int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
  40                              int mmu_idx)
  41 {
  42     env->tea = address;
  43     env->exception_index = -1;
  44     switch (rw) {
  45     case 0:
  46         env->exception_index = 0x0a0;
  47         break;
  48     case 1:
  49         env->exception_index = 0x0c0;
  50         break;
  51     case 2:
  52         env->exception_index = 0x0a0;
  53         break;
  54     }
  55     return 1;
  56 }
  57
  58 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
  59 {
  60     /* For user mode, only U0 area is cachable. */
  61     return !(addr & 0x80000000);
  62 }
  63
  64 #else /* !CONFIG_USER_ONLY */
  65
  66 #define MMU_OK                   0
  67 #define MMU_ITLB_MISS            (-1)
  68 #define MMU_ITLB_MULTIPLE        (-2)
  69 #define MMU_ITLB_VIOLATION       (-3)
  70 #define MMU_DTLB_MISS_READ       (-4)
  71 #define MMU_DTLB_MISS_WRITE      (-5)
  72 #define MMU_DTLB_INITIAL_WRITE   (-6)
  73 #define MMU_DTLB_VIOLATION_READ  (-7)
  74 #define MMU_DTLB_VIOLATION_WRITE (-8)
  75 #define MMU_DTLB_MULTIPLE        (-9)
  76 #define MMU_DTLB_MISS            (-10)
  77 #define MMU_IADDR_ERROR          (-11)
  78 #define MMU_DADDR_ERROR_READ     (-12)
  79 #define MMU_DADDR_ERROR_WRITE    (-13)
  80
  81 void do_interrupt(CPUState * env)
  82 {
  83     int do_irq = env->interrupt_request & CPU_INTERRUPT_HARD;
  84     int do_exp, irq_vector = env->exception_index;
  85
  86     /* prioritize exceptions over interrupts */
  87
  88     do_exp = env->exception_index != -1;
  89     do_irq = do_irq && (env->exception_index == -1);
  90
  91     if (env->sr & SR_BL) {
  92         if (do_exp && env->exception_index != 0x1e0) {
  93             env->exception_index = 0x000; /* masked exception -> reset */
  94         }
  95         if (do_irq && !env->in_sleep) {
  96             return; /* masked */
  97         }
  98     }
  99     env->in_sleep = 0;
 100
 101     if (do_irq) {
 102         irq_vector = sh_intc_get_pending_vector(env->intc_handle,
 103                                                 (env->sr >> 4) & 0xf);
 104         if (irq_vector == -1) {
 105             return; /* masked */
 106         }
 107     }
 108
 109     if (qemu_loglevel_mask(CPU_LOG_INT)) {
 110         const char *expname;
 111         switch (env->exception_index) {
 112         case 0x0e0:
 113             expname = "addr_error";
 114             break;
 115         case 0x040:
 116             expname = "tlb_miss";
 117             break;
 118         case 0x0a0:
 119             expname = "tlb_violation";
 120             break;
 121         case 0x180:
 122             expname = "illegal_instruction";
 123             break;
 124         case 0x1a0:
 125             expname = "slot_illegal_instruction";
 126             break;
 127         case 0x800:
 128             expname = "fpu_disable";
 129             break;
 130         case 0x820:
 131             expname = "slot_fpu";
 132             break;
 133         case 0x100:
 134             expname = "data_write";
 135             break;
 136         case 0x060:
 137             expname = "dtlb_miss_write";
 138             break;
 139         case 0x0c0:
 140             expname = "dtlb_violation_write";
 141             break;
 142         case 0x120:
 143             expname = "fpu_exception";
 144             break;
 145         case 0x080:
 146             expname = "initial_page_write";
 147             break;
 148         case 0x160:
 149             expname = "trapa";
 150             break;
 151         default:
 152             expname = do_irq ? "interrupt" : "???";
 153             break;
 154         }
 155         qemu_log("exception 0x%03x [%s] raised\n",
 156                   irq_vector, expname);
 157         log_cpu_state(env, 0);
 158     }
 159
 160     env->ssr = env->sr;
 161     env->spc = env->pc;
 162     env->sgr = env->gregs[15];
 163     env->sr |= SR_BL | SR_MD | SR_RB;
 164
 165     if (env->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL)) {
 166         /* Branch instruction should be executed again before delay slot. */
 167         env->spc -= 2;
 168         /* Clear flags for exception/interrupt routine. */
 169         env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL | DELAY_SLOT_TRUE);
 170     }
 171     if (env->flags & DELAY_SLOT_CLEARME)
 172         env->flags = 0;
 173
 174     if (do_exp) {
 175         env->expevt = env->exception_index;
 176         switch (env->exception_index) {
 177         case 0x000:
 178         case 0x020:
 179         case 0x140:
 180             env->sr &= ~SR_FD;
 181             env->sr |= 0xf << 4; /* IMASK */
 182             env->pc = 0xa0000000;
 183             break;
 184         case 0x040:
 185         case 0x060:
 186             env->pc = env->vbr + 0x400;
 187             break;
 188         case 0x160:
 189             env->spc += 2; /* special case for TRAPA */
 190             /* fall through */
 191         default:
 192             env->pc = env->vbr + 0x100;
 193             break;
 194         }
 195         return;
 196     }
 197
 198     if (do_irq) {
 199         env->intevt = irq_vector;
 200         env->pc = env->vbr + 0x600;
 201         return;
 202     }
 203 }
 204
 205 static void update_itlb_use(CPUState * env, int itlbnb)
 206 {
 207     uint8_t or_mask = 0, and_mask = (uint8_t) - 1;
 208
 209     switch (itlbnb) {
 210     case 0:
 211         and_mask = 0x1f;
 212         break;
 213     case 1:
 214         and_mask = 0xe7;
 215         or_mask = 0x80;
 216         break;
 217     case 2:
 218         and_mask = 0xfb;
 219         or_mask = 0x50;
 220         break;
 221     case 3:
 222         or_mask = 0x2c;
 223         break;
 224     }
 225
 226     env->mmucr &= (and_mask << 24) | 0x00ffffff;
 227     env->mmucr |= (or_mask << 24);
 228 }
 229
 230 static int itlb_replacement(CPUState * env)
 231 {
 232     if ((env->mmucr & 0xe0000000) == 0xe0000000)
 233         return 0;
 234     if ((env->mmucr & 0x98000000) == 0x18000000)
 235         return 1;
 236     if ((env->mmucr & 0x54000000) == 0x04000000)
 237         return 2;
 238     if ((env->mmucr & 0x2c000000) == 0x00000000)
 239         return 3;
 240     cpu_abort(env, "Unhandled itlb_replacement");
 241 }
 242
 243 /* Find the corresponding entry in the right TLB
 244    Return entry, MMU_DTLB_MISS or MMU_DTLB_MULTIPLE
 245 */
 246 static int find_tlb_entry(CPUState * env, target_ulong address,
 247                           tlb_t * entries, uint8_t nbtlb, int use_asid)
 248 {
 249     int match = MMU_DTLB_MISS;
 250     uint32_t start, end;
 251     uint8_t asid;
 252     int i;
 253
 254     asid = env->pteh & 0xff;
 255
 256     for (i = 0; i < nbtlb; i++) {
 257         if (!entries[i].v)
 258             continue;           /* Invalid entry */
 259         if (!entries[i].sh && use_asid && entries[i].asid != asid)
 260             continue;           /* Bad ASID */
 261         start = (entries[i].vpn << 10) & ~(entries[i].size - 1);
 262         end = start + entries[i].size - 1;
 263         if (address >= start && address <= end) {       /* Match */
 264             if (match != MMU_DTLB_MISS)
 265                 return MMU_DTLB_MULTIPLE;       /* Multiple match */
 266             match = i;
 267         }
 268     }
 269     return match;
 270 }
 271
 272 static void increment_urc(CPUState * env)
 273 {
 274     uint8_t urb, urc;
 275
 276     /* Increment URC */
 277     urb = ((env->mmucr) >> 18) & 0x3f;
 278     urc = ((env->mmucr) >> 10) & 0x3f;
 279     urc++;
 280     if ((urb > 0 && urc > urb) || urc > (UTLB_SIZE - 1))
 281         urc = 0;
 282     env->mmucr = (env->mmucr & 0xffff03ff) | (urc << 10);
 283 }
 284
 285 /* Copy and utlb entry into itlb
 286    Return entry
 287 */
 288 static int copy_utlb_entry_itlb(CPUState *env, int utlb)
 289 {
 290     int itlb;
 291
 292     tlb_t * ientry;
 293     itlb = itlb_replacement(env);
 294     ientry = &env->itlb[itlb];
 295     if (ientry->v) {
 296         tlb_flush_page(env, ientry->vpn << 10);
 297     }
 298     *ientry = env->utlb[utlb];
 299     update_itlb_use(env, itlb);
 300     return itlb;
 301 }
 302
 303 /* Find itlb entry
 304    Return entry, MMU_ITLB_MISS, MMU_ITLB_MULTIPLE or MMU_DTLB_MULTIPLE
 305 */
 306 static int find_itlb_entry(CPUState * env, target_ulong address,
 307                            int use_asid)
 308 {
 309     int e;
 310
 311     e = find_tlb_entry(env, address, env->itlb, ITLB_SIZE, use_asid);
 312     if (e == MMU_DTLB_MULTIPLE) {
 313         e = MMU_ITLB_MULTIPLE;
 314     } else if (e == MMU_DTLB_MISS) {
 315         e = MMU_ITLB_MISS;
 316     } else if (e >= 0) {
 317         update_itlb_use(env, e);
 318     }
 319     return e;
 320 }
 321
 322 /* Find utlb entry
 323    Return entry, MMU_DTLB_MISS, MMU_DTLB_MULTIPLE */
 324 static int find_utlb_entry(CPUState * env, target_ulong address, int use_asid)
 325 {
 326     /* per utlb access */
 327     increment_urc(env);
 328
 329     /* Return entry */
 330     return find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
 331 }
 332
 333 /* Match address against MMU
 334    Return MMU_OK, MMU_DTLB_MISS_READ, MMU_DTLB_MISS_WRITE,
 335    MMU_DTLB_INITIAL_WRITE, MMU_DTLB_VIOLATION_READ,
 336    MMU_DTLB_VIOLATION_WRITE, MMU_ITLB_MISS,
 337    MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION,
 338    MMU_IADDR_ERROR, MMU_DADDR_ERROR_READ, MMU_DADDR_ERROR_WRITE.
 339 */
 340 static int get_mmu_address(CPUState * env, target_ulong * physical,
 341                            int *prot, target_ulong address,
 342                            int rw, int access_type)
 343 {
 344     int use_asid, n;
 345     tlb_t *matching = NULL;
 346
 347     use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0;
 348
 349     if (rw == 2) {
 350         n = find_itlb_entry(env, address, use_asid);
 351         if (n >= 0) {
 352             matching = &env->itlb[n];
 353             if (!(env->sr & SR_MD) && !(matching->pr & 2))
 354                 n = MMU_ITLB_VIOLATION;
 355             else
 356                 *prot = PAGE_EXEC;
 357         } else {
 358             n = find_utlb_entry(env, address, use_asid);
 359             if (n >= 0) {
 360                 n = copy_utlb_entry_itlb(env, n);
 361                 matching = &env->itlb[n];
 362                 if (!(env->sr & SR_MD) && !(matching->pr & 2)) {
 363                       n = MMU_ITLB_VIOLATION;
 364                 } else {
 365                     *prot = PAGE_READ | PAGE_EXEC;
 366                     if ((matching->pr & 1) && matching->d) {
 367                         *prot |= PAGE_WRITE;
 368                     }
 369                 }
 370             } else if (n == MMU_DTLB_MULTIPLE) {
 371                 n = MMU_ITLB_MULTIPLE;
 372             } else if (n == MMU_DTLB_MISS) {
 373                 n = MMU_ITLB_MISS;
 374             }
 375         }
 376     } else {
 377         n = find_utlb_entry(env, address, use_asid);
 378         if (n >= 0) {
 379             matching = &env->utlb[n];
 380             if (!(env->sr & SR_MD) && !(matching->pr & 2)) {
 381                 n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE :
 382                     MMU_DTLB_VIOLATION_READ;
 383             } else if ((rw == 1) && !(matching->pr & 1)) {
 384                 n = MMU_DTLB_VIOLATION_WRITE;
 385             } else if ((rw == 1) && !matching->d) {
 386                 n = MMU_DTLB_INITIAL_WRITE;
 387             } else {
 388                 *prot = PAGE_READ;
 389                 if ((matching->pr & 1) && matching->d) {
 390                     *prot |= PAGE_WRITE;
 391                 }
 392             }
 393         } else if (n == MMU_DTLB_MISS) {
 394             n = (rw == 1) ? MMU_DTLB_MISS_WRITE :
 395                 MMU_DTLB_MISS_READ;
 396         }
 397     }
 398     if (n >= 0) {
 399         n = MMU_OK;
 400         *physical = ((matching->ppn << 10) & ~(matching->size - 1)) |
 401             (address & (matching->size - 1));
 402     }
 403     return n;
 404 }
 405
 406 static int get_physical_address(CPUState * env, target_ulong * physical,
 407                                 int *prot, target_ulong address,
 408                                 int rw, int access_type)
 409 {
 410     /* P1, P2 and P4 areas do not use translation */
 411     if ((address >= 0x80000000 && address < 0xc0000000) ||
 412         address >= 0xe0000000) {
 413         if (!(env->sr & SR_MD)
 414             && (address < 0xe0000000 || address >= 0xe4000000)) {
 415             /* Unauthorized access in user mode (only store queues are available) */
 416             fprintf(stderr, "Unauthorized access\n");
 417             if (rw == 0)
 418                 return MMU_DADDR_ERROR_READ;
 419             else if (rw == 1)
 420                 return MMU_DADDR_ERROR_WRITE;
 421             else
 422                 return MMU_IADDR_ERROR;
 423         }
 424         if (address >= 0x80000000 && address < 0xc0000000) {
 425             /* Mask upper 3 bits for P1 and P2 areas */
 426             *physical = address & 0x1fffffff;
 427         } else {
 428             *physical = address;
 429         }
 430         *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
 431         return MMU_OK;
 432     }
 433
 434     /* If MMU is disabled, return the corresponding physical page */
 435     if (!(env->mmucr & MMUCR_AT)) {
 436         *physical = address & 0x1FFFFFFF;
 437         *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
 438         return MMU_OK;
 439     }
 440
 441     /* We need to resort to the MMU */
 442     return get_mmu_address(env, physical, prot, address, rw, access_type);
 443 }
 444
 445 int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
 446                              int mmu_idx)
 447 {
 448     target_ulong physical;
 449     int prot, ret, access_type;
 450
 451     access_type = ACCESS_INT;
 452     ret =
 453         get_physical_address(env, &physical, &prot, address, rw,
 454                              access_type);
 455
 456     if (ret != MMU_OK) {
 457         env->tea = address;
 458         if (ret != MMU_DTLB_MULTIPLE && ret != MMU_ITLB_MULTIPLE) {
 459             env->pteh = (env->pteh & PTEH_ASID_MASK) |
 460                     (address & PTEH_VPN_MASK);
 461         }
 462         switch (ret) {
 463         case MMU_ITLB_MISS:
 464         case MMU_DTLB_MISS_READ:
 465             env->exception_index = 0x040;
 466             break;
 467         case MMU_DTLB_MULTIPLE:
 468         case MMU_ITLB_MULTIPLE:
 469             env->exception_index = 0x140;
 470             break;
 471         case MMU_ITLB_VIOLATION:
 472             env->exception_index = 0x0a0;
 473             break;
 474         case MMU_DTLB_MISS_WRITE:
 475             env->exception_index = 0x060;
 476             break;
 477         case MMU_DTLB_INITIAL_WRITE:
 478             env->exception_index = 0x080;
 479             break;
 480         case MMU_DTLB_VIOLATION_READ:
 481             env->exception_index = 0x0a0;
 482             break;
 483         case MMU_DTLB_VIOLATION_WRITE:
 484             env->exception_index = 0x0c0;
 485             break;
 486         case MMU_IADDR_ERROR:
 487         case MMU_DADDR_ERROR_READ:
 488             env->exception_index = 0x0e0;
 489             break;
 490         case MMU_DADDR_ERROR_WRITE:
 491             env->exception_index = 0x100;
 492             break;
 493         default:
 494             cpu_abort(env, "Unhandled MMU fault");
 495         }
 496         return 1;
 497     }
 498
 499     address &= TARGET_PAGE_MASK;
 500     physical &= TARGET_PAGE_MASK;
 501
 502     tlb_set_page(env, address, physical, prot, mmu_idx, TARGET_PAGE_SIZE);
 503     return 0;
 504 }
 505
 506 target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
 507 {
 508     target_ulong physical;
 509     int prot;
 510
 511     get_physical_address(env, &physical, &prot, addr, 0, 0);
 512     return physical;
 513 }
 514
 515 void cpu_load_tlb(CPUSH4State * env)
 516 {
 517     int n = cpu_mmucr_urc(env->mmucr);
 518     tlb_t * entry = &env->utlb[n];
 519
 520     if (entry->v) {
 521         /* Overwriting valid entry in utlb. */
 522         target_ulong address = entry->vpn << 10;
 523         tlb_flush_page(env, address);
 524     }
 525
 526     /* Take values into cpu status from registers. */
 527     entry->asid = (uint8_t)cpu_pteh_asid(env->pteh);
 528     entry->vpn  = cpu_pteh_vpn(env->pteh);
 529     entry->v    = (uint8_t)cpu_ptel_v(env->ptel);
 530     entry->ppn  = cpu_ptel_ppn(env->ptel);
 531     entry->sz   = (uint8_t)cpu_ptel_sz(env->ptel);
 532     switch (entry->sz) {
 533     case 0: /* 00 */
 534         entry->size = 1024; /* 1K */
 535         break;
 536     case 1: /* 01 */
 537         entry->size = 1024 * 4; /* 4K */
 538         break;
 539     case 2: /* 10 */
 540         entry->size = 1024 * 64; /* 64K */
 541         break;
 542     case 3: /* 11 */
 543         entry->size = 1024 * 1024; /* 1M */
 544         break;
 545     default:
 546         cpu_abort(env, "Unhandled load_tlb");
 547         break;
 548     }
 549     entry->sh   = (uint8_t)cpu_ptel_sh(env->ptel);
 550     entry->c    = (uint8_t)cpu_ptel_c(env->ptel);
 551     entry->pr   = (uint8_t)cpu_ptel_pr(env->ptel);
 552     entry->d    = (uint8_t)cpu_ptel_d(env->ptel);
 553     entry->wt   = (uint8_t)cpu_ptel_wt(env->ptel);
 554     entry->sa   = (uint8_t)cpu_ptea_sa(env->ptea);
 555     entry->tc   = (uint8_t)cpu_ptea_tc(env->ptea);
 556 }
 557
 558  void cpu_sh4_invalidate_tlb(CPUSH4State *s)
 559 {
 560     int i;
 561
 562     /* UTLB */
 563     for (i = 0; i < UTLB_SIZE; i++) {
 564         tlb_t * entry = &s->utlb[i];
 565         entry->v = 0;
 566     }
 567     /* ITLB */
 568     for (i = 0; i < ITLB_SIZE; i++) {
 569         tlb_t * entry = &s->itlb[i];
 570         entry->v = 0;
 571     }
 572
 573     tlb_flush(s, 1);
 574 }
 575
 576 uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
 577                                        target_phys_addr_t addr)
 578 {
 579     int index = (addr & 0x00000300) >> 8;
 580     tlb_t * entry = &s->itlb[index];
 581
 582     return (entry->vpn  << 10) |
 583            (entry->v    <<  8) |
 584            (entry->asid);
 585 }
 586
 587 void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, target_phys_addr_t addr,
 588                                     uint32_t mem_value)
 589 {
 590     uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
 591     uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
 592     uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
 593
 594     int index = (addr & 0x00000300) >> 8;
 595     tlb_t * entry = &s->itlb[index];
 596     if (entry->v) {
 597         /* Overwriting valid entry in itlb. */
 598         target_ulong address = entry->vpn << 10;
 599         tlb_flush_page(s, address);
 600     }
 601     entry->asid = asid;
 602     entry->vpn = vpn;
 603     entry->v = v;
 604 }
 605
 606 uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
 607                                        target_phys_addr_t addr)
 608 {
 609     int array = (addr & 0x00800000) >> 23;
 610     int index = (addr & 0x00000300) >> 8;
 611     tlb_t * entry = &s->itlb[index];
 612
 613     if (array == 0) {
 614         /* ITLB Data Array 1 */
 615         return (entry->ppn << 10) |
 616                (entry->v   <<  8) |
 617                (entry->pr  <<  5) |
 618                ((entry->sz & 1) <<  6) |
 619                ((entry->sz & 2) <<  4) |
 620                (entry->c   <<  3) |
 621                (entry->sh  <<  1);
 622     } else {
 623         /* ITLB Data Array 2 */
 624         return (entry->tc << 1) |
 625                (entry->sa);
 626     }
 627 }
 628
 629 void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, target_phys_addr_t addr,
 630                                     uint32_t mem_value)
 631 {
 632     int array = (addr & 0x00800000) >> 23;
 633     int index = (addr & 0x00000300) >> 8;
 634     tlb_t * entry = &s->itlb[index];
 635
 636     if (array == 0) {
 637         /* ITLB Data Array 1 */
 638         if (entry->v) {
 639             /* Overwriting valid entry in utlb. */
 640             target_ulong address = entry->vpn << 10;
 641             tlb_flush_page(s, address);
 642         }
 643         entry->ppn = (mem_value & 0x1ffffc00) >> 10;
 644         entry->v   = (mem_value & 0x00000100) >> 8;
 645         entry->sz  = (mem_value & 0x00000080) >> 6 |
 646                      (mem_value & 0x00000010) >> 4;
 647         entry->pr  = (mem_value & 0x00000040) >> 5;
 648         entry->c   = (mem_value & 0x00000008) >> 3;
 649         entry->sh  = (mem_value & 0x00000002) >> 1;
 650     } else {
 651         /* ITLB Data Array 2 */
 652         entry->tc  = (mem_value & 0x00000008) >> 3;
 653         entry->sa  = (mem_value & 0x00000007);
 654     }
 655 }
 656
 657 uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
 658                                        target_phys_addr_t addr)
 659 {
 660     int index = (addr & 0x00003f00) >> 8;
 661     tlb_t * entry = &s->utlb[index];
 662
 663     increment_urc(s); /* per utlb access */
 664
 665     return (entry->vpn  << 10) |
 666            (entry->v    <<  8) |
 667            (entry->asid);
 668 }
 669
 670 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, target_phys_addr_t addr,
 671                                     uint32_t mem_value)
 672 {
 673     int associate = addr & 0x0000080;
 674     uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
 675     uint8_t d = (uint8_t)((mem_value & 0x00000200) >> 9);
 676     uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
 677     uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
 678     int use_asid = (s->mmucr & MMUCR_SV) == 0 || (s->sr & SR_MD) == 0;
 679
 680     if (associate) {
 681         int i;
 682         tlb_t * utlb_match_entry = NULL;
 683         int needs_tlb_flush = 0;
 684
 685         /* search UTLB */
 686         for (i = 0; i < UTLB_SIZE; i++) {
 687             tlb_t * entry = &s->utlb[i];
 688             if (!entry->v)
 689                 continue;
 690
 691             if (entry->vpn == vpn
 692                 && (!use_asid || entry->asid == asid || entry->sh)) {
 693                 if (utlb_match_entry) {
 694                     /* Multiple TLB Exception */
 695                     s->exception_index = 0x140;
 696                     s->tea = addr;
 697                     break;
 698                 }
 699                 if (entry->v && !v)
 700                     needs_tlb_flush = 1;
 701                 entry->v = v;
 702                 entry->d = d;
 703                 utlb_match_entry = entry;
 704             }
 705             increment_urc(s); /* per utlb access */
 706         }
 707
 708         /* search ITLB */
 709         for (i = 0; i < ITLB_SIZE; i++) {
 710             tlb_t * entry = &s->itlb[i];
 711             if (entry->vpn == vpn
 712                 && (!use_asid || entry->asid == asid || entry->sh)) {
 713                 if (entry->v && !v)
 714                     needs_tlb_flush = 1;
 715                 if (utlb_match_entry)
 716                     *entry = *utlb_match_entry;
 717                 else
 718                     entry->v = v;
 719                 break;
 720             }
 721         }
 722
 723         if (needs_tlb_flush)
 724             tlb_flush_page(s, vpn << 10);
 725
 726     } else {
 727         int index = (addr & 0x00003f00) >> 8;
 728         tlb_t * entry = &s->utlb[index];
 729         if (entry->v) {
 730             /* Overwriting valid entry in utlb. */
 731             target_ulong address = entry->vpn << 10;
 732             tlb_flush_page(s, address);
 733         }
 734         entry->asid = asid;
 735         entry->vpn = vpn;
 736         entry->d = d;
 737         entry->v = v;
 738         increment_urc(s);
 739     }
 740 }
 741
 742 uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
 743                                        target_phys_addr_t addr)
 744 {
 745     int array = (addr & 0x00800000) >> 23;
 746     int index = (addr & 0x00003f00) >> 8;
 747     tlb_t * entry = &s->utlb[index];
 748
 749     increment_urc(s); /* per utlb access */
 750
 751     if (array == 0) {
 752         /* ITLB Data Array 1 */
 753         return (entry->ppn << 10) |
 754                (entry->v   <<  8) |
 755                (entry->pr  <<  5) |
 756                ((entry->sz & 1) <<  6) |
 757                ((entry->sz & 2) <<  4) |
 758                (entry->c   <<  3) |
 759                (entry->d   <<  2) |
 760                (entry->sh  <<  1) |
 761                (entry->wt);
 762     } else {
 763         /* ITLB Data Array 2 */
 764         return (entry->tc << 1) |
 765                (entry->sa);
 766     }
 767 }
 768
 769 void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, target_phys_addr_t addr,
 770                                     uint32_t mem_value)
 771 {
 772     int array = (addr & 0x00800000) >> 23;
 773     int index = (addr & 0x00003f00) >> 8;
 774     tlb_t * entry = &s->utlb[index];
 775
 776     increment_urc(s); /* per utlb access */
 777
 778     if (array == 0) {
 779         /* UTLB Data Array 1 */
 780         if (entry->v) {
 781             /* Overwriting valid entry in utlb. */
 782             target_ulong address = entry->vpn << 10;
 783             tlb_flush_page(s, address);
 784         }
 785         entry->ppn = (mem_value & 0x1ffffc00) >> 10;
 786         entry->v   = (mem_value & 0x00000100) >> 8;
 787         entry->sz  = (mem_value & 0x00000080) >> 6 |
 788                      (mem_value & 0x00000010) >> 4;
 789         entry->pr  = (mem_value & 0x00000060) >> 5;
 790         entry->c   = (mem_value & 0x00000008) >> 3;
 791         entry->d   = (mem_value & 0x00000004) >> 2;
 792         entry->sh  = (mem_value & 0x00000002) >> 1;
 793         entry->wt  = (mem_value & 0x00000001);
 794     } else {
 795         /* UTLB Data Array 2 */
 796         entry->tc = (mem_value & 0x00000008) >> 3;
 797         entry->sa = (mem_value & 0x00000007);
 798     }
 799 }
 800
 801 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
 802 {
 803     int n;
 804     int use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0;
 805
 806     /* check area */
 807     if (env->sr & SR_MD) {
 808         /* For previledged mode, P2 and P4 area is not cachable. */
 809         if ((0xA0000000 <= addr && addr < 0xC0000000) || 0xE0000000 <= addr)
 810             return 0;
 811     } else {
 812         /* For user mode, only U0 area is cachable. */
 813         if (0x80000000 <= addr)
 814             return 0;
 815     }
 816
 817     /*
 818      * TODO : Evaluate CCR and check if the cache is on or off.
 819      *        Now CCR is not in CPUSH4State, but in SH7750State.
 820      *        When you move the ccr into CPUSH4State, the code will be
 821      *        as follows.
 822      */
 823 #if 0
 824     /* check if operand cache is enabled or not. */
 825     if (!(env->ccr & 1))
 826         return 0;
 827 #endif
 828
 829     /* if MMU is off, no check for TLB. */
 830     if (env->mmucr & MMUCR_AT)
 831         return 1;
 832
 833     /* check TLB */
 834     n = find_tlb_entry(env, addr, env->itlb, ITLB_SIZE, use_asid);
 835     if (n >= 0)
 836         return env->itlb[n].c;
 837
 838     n = find_tlb_entry(env, addr, env->utlb, UTLB_SIZE, use_asid);
 839     if (n >= 0)
 840         return env->utlb[n].c;
 841
 842     return 0;
 843 }
 844
 845 #endif