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/sh4/sh_intc.h"
  30 #endif
  31
  32 #if defined(CONFIG_USER_ONLY)
  33
  34 void superh_cpu_do_interrupt(CPUState *cs)
  35 {
  36     cs->exception_index = -1;
  37 }
  38
  39 int superh_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
  40                                 int mmu_idx)
  41 {
  42     SuperHCPU *cpu = SUPERH_CPU(cs);
  43     CPUSH4State *env = &cpu->env;
  44
  45     env->tea = address;
  46     cs->exception_index = -1;
  47     switch (rw) {
  48     case 0:
  49         cs->exception_index = 0x0a0;
  50         break;
  51     case 1:
  52         cs->exception_index = 0x0c0;
  53         break;
  54     case 2:
  55         cs->exception_index = 0x0a0;
  56         break;
  57     }
  58     return 1;
  59 }
  60
  61 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
  62 {
  63     /* For user mode, only U0 area is cachable. */
  64     return !(addr & 0x80000000);
  65 }
  66
  67 #else /* !CONFIG_USER_ONLY */
  68
  69 #define MMU_OK                   0
  70 #define MMU_ITLB_MISS            (-1)
  71 #define MMU_ITLB_MULTIPLE        (-2)
  72 #define MMU_ITLB_VIOLATION       (-3)
  73 #define MMU_DTLB_MISS_READ       (-4)
  74 #define MMU_DTLB_MISS_WRITE      (-5)
  75 #define MMU_DTLB_INITIAL_WRITE   (-6)
  76 #define MMU_DTLB_VIOLATION_READ  (-7)
  77 #define MMU_DTLB_VIOLATION_WRITE (-8)
  78 #define MMU_DTLB_MULTIPLE        (-9)
  79 #define MMU_DTLB_MISS            (-10)
  80 #define MMU_IADDR_ERROR          (-11)
  81 #define MMU_DADDR_ERROR_READ     (-12)
  82 #define MMU_DADDR_ERROR_WRITE    (-13)
  83
  84 void superh_cpu_do_interrupt(CPUState *cs)
  85 {
  86     SuperHCPU *cpu = SUPERH_CPU(cs);
  87     CPUSH4State *env = &cpu->env;
  88     int do_irq = cs->interrupt_request & CPU_INTERRUPT_HARD;
  89     int do_exp, irq_vector = cs->exception_index;
  90
  91     /* prioritize exceptions over interrupts */
  92
  93     do_exp = cs->exception_index != -1;
  94     do_irq = do_irq && (cs->exception_index == -1);
  95
  96     if (env->sr & SR_BL) {
  97         if (do_exp && cs->exception_index != 0x1e0) {
  98             cs->exception_index = 0x000; /* masked exception -> reset */
  99         }
 100         if (do_irq && !env->in_sleep) {
 101             return; /* masked */
 102         }
 103     }
 104     env->in_sleep = 0;
 105
 106     if (do_irq) {
 107         irq_vector = sh_intc_get_pending_vector(env->intc_handle,
 108                                                 (env->sr >> 4) & 0xf);
 109         if (irq_vector == -1) {
 110             return; /* masked */
 111         }
 112     }
 113
 114     if (qemu_loglevel_mask(CPU_LOG_INT)) {
 115         const char *expname;
 116         switch (cs->exception_index) {
 117         case 0x0e0:
 118             expname = "addr_error";
 119             break;
 120         case 0x040:
 121             expname = "tlb_miss";
 122             break;
 123         case 0x0a0:
 124             expname = "tlb_violation";
 125             break;
 126         case 0x180:
 127             expname = "illegal_instruction";
 128             break;
 129         case 0x1a0:
 130             expname = "slot_illegal_instruction";
 131             break;
 132         case 0x800:
 133             expname = "fpu_disable";
 134             break;
 135         case 0x820:
 136             expname = "slot_fpu";
 137             break;
 138         case 0x100:
 139             expname = "data_write";
 140             break;
 141         case 0x060:
 142             expname = "dtlb_miss_write";
 143             break;
 144         case 0x0c0:
 145             expname = "dtlb_violation_write";
 146             break;
 147         case 0x120:
 148             expname = "fpu_exception";
 149             break;
 150         case 0x080:
 151             expname = "initial_page_write";
 152             break;
 153         case 0x160:
 154             expname = "trapa";
 155             break;
 156         default:
 157             expname = do_irq ? "interrupt" : "???";
 158             break;
 159         }
 160         qemu_log("exception 0x%03x [%s] raised\n",
 161                   irq_vector, expname);
 162         log_cpu_state(cs, 0);
 163     }
 164
 165     env->ssr = env->sr;
 166     env->spc = env->pc;
 167     env->sgr = env->gregs[15];
 168     env->sr |= SR_BL | SR_MD | SR_RB;
 169
 170     if (env->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL)) {
 171         /* Branch instruction should be executed again before delay slot. */
 172         env->spc -= 2;
 173         /* Clear flags for exception/interrupt routine. */
 174         env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL | DELAY_SLOT_TRUE);
 175     }
 176     if (env->flags & DELAY_SLOT_CLEARME)
 177         env->flags = 0;
 178
 179     if (do_exp) {
 180         env->expevt = cs->exception_index;
 181         switch (cs->exception_index) {
 182         case 0x000:
 183         case 0x020:
 184         case 0x140:
 185             env->sr &= ~SR_FD;
 186             env->sr |= 0xf << 4; /* IMASK */
 187             env->pc = 0xa0000000;
 188             break;
 189         case 0x040:
 190         case 0x060:
 191             env->pc = env->vbr + 0x400;
 192             break;
 193         case 0x160:
 194             env->spc += 2; /* special case for TRAPA */
 195             /* fall through */
 196         default:
 197             env->pc = env->vbr + 0x100;
 198             break;
 199         }
 200         return;
 201     }
 202
 203     if (do_irq) {
 204         env->intevt = irq_vector;
 205         env->pc = env->vbr + 0x600;
 206         return;
 207     }
 208 }
 209
 210 static void update_itlb_use(CPUSH4State * env, int itlbnb)
 211 {
 212     uint8_t or_mask = 0, and_mask = (uint8_t) - 1;
 213
 214     switch (itlbnb) {
 215     case 0:
 216         and_mask = 0x1f;
 217         break;
 218     case 1:
 219         and_mask = 0xe7;
 220         or_mask = 0x80;
 221         break;
 222     case 2:
 223         and_mask = 0xfb;
 224         or_mask = 0x50;
 225         break;
 226     case 3:
 227         or_mask = 0x2c;
 228         break;
 229     }
 230
 231     env->mmucr &= (and_mask << 24) | 0x00ffffff;
 232     env->mmucr |= (or_mask << 24);
 233 }
 234
 235 static int itlb_replacement(CPUSH4State * env)
 236 {
 237     SuperHCPU *cpu = sh_env_get_cpu(env);
 238
 239     if ((env->mmucr & 0xe0000000) == 0xe0000000) {
 240         return 0;
 241     }
 242     if ((env->mmucr & 0x98000000) == 0x18000000) {
 243         return 1;
 244     }
 245     if ((env->mmucr & 0x54000000) == 0x04000000) {
 246         return 2;
 247     }
 248     if ((env->mmucr & 0x2c000000) == 0x00000000) {
 249         return 3;
 250     }
 251     cpu_abort(CPU(cpu), "Unhandled itlb_replacement");
 252 }
 253
 254 /* Find the corresponding entry in the right TLB
 255    Return entry, MMU_DTLB_MISS or MMU_DTLB_MULTIPLE
 256 */
 257 static int find_tlb_entry(CPUSH4State * env, target_ulong address,
 258                           tlb_t * entries, uint8_t nbtlb, int use_asid)
 259 {
 260     int match = MMU_DTLB_MISS;
 261     uint32_t start, end;
 262     uint8_t asid;
 263     int i;
 264
 265     asid = env->pteh & 0xff;
 266
 267     for (i = 0; i < nbtlb; i++) {
 268         if (!entries[i].v)
 269             continue;           /* Invalid entry */
 270         if (!entries[i].sh && use_asid && entries[i].asid != asid)
 271             continue;           /* Bad ASID */
 272         start = (entries[i].vpn << 10) & ~(entries[i].size - 1);
 273         end = start + entries[i].size - 1;
 274         if (address >= start && address <= end) {       /* Match */
 275             if (match != MMU_DTLB_MISS)
 276                 return MMU_DTLB_MULTIPLE;       /* Multiple match */
 277             match = i;
 278         }
 279     }
 280     return match;
 281 }
 282
 283 static void increment_urc(CPUSH4State * env)
 284 {
 285     uint8_t urb, urc;
 286
 287     /* Increment URC */
 288     urb = ((env->mmucr) >> 18) & 0x3f;
 289     urc = ((env->mmucr) >> 10) & 0x3f;
 290     urc++;
 291     if ((urb > 0 && urc > urb) || urc > (UTLB_SIZE - 1))
 292         urc = 0;
 293     env->mmucr = (env->mmucr & 0xffff03ff) | (urc << 10);
 294 }
 295
 296 /* Copy and utlb entry into itlb
 297    Return entry
 298 */
 299 static int copy_utlb_entry_itlb(CPUSH4State *env, int utlb)
 300 {
 301     int itlb;
 302
 303     tlb_t * ientry;
 304     itlb = itlb_replacement(env);
 305     ientry = &env->itlb[itlb];
 306     if (ientry->v) {
 307         tlb_flush_page(CPU(sh_env_get_cpu(env)), ientry->vpn << 10);
 308     }
 309     *ientry = env->utlb[utlb];
 310     update_itlb_use(env, itlb);
 311     return itlb;
 312 }
 313
 314 /* Find itlb entry
 315    Return entry, MMU_ITLB_MISS, MMU_ITLB_MULTIPLE or MMU_DTLB_MULTIPLE
 316 */
 317 static int find_itlb_entry(CPUSH4State * env, target_ulong address,
 318                            int use_asid)
 319 {
 320     int e;
 321
 322     e = find_tlb_entry(env, address, env->itlb, ITLB_SIZE, use_asid);
 323     if (e == MMU_DTLB_MULTIPLE) {
 324         e = MMU_ITLB_MULTIPLE;
 325     } else if (e == MMU_DTLB_MISS) {
 326         e = MMU_ITLB_MISS;
 327     } else if (e >= 0) {
 328         update_itlb_use(env, e);
 329     }
 330     return e;
 331 }
 332
 333 /* Find utlb entry
 334    Return entry, MMU_DTLB_MISS, MMU_DTLB_MULTIPLE */
 335 static int find_utlb_entry(CPUSH4State * env, target_ulong address, int use_asid)
 336 {
 337     /* per utlb access */
 338     increment_urc(env);
 339
 340     /* Return entry */
 341     return find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
 342 }
 343
 344 /* Match address against MMU
 345    Return MMU_OK, MMU_DTLB_MISS_READ, MMU_DTLB_MISS_WRITE,
 346    MMU_DTLB_INITIAL_WRITE, MMU_DTLB_VIOLATION_READ,
 347    MMU_DTLB_VIOLATION_WRITE, MMU_ITLB_MISS,
 348    MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION,
 349    MMU_IADDR_ERROR, MMU_DADDR_ERROR_READ, MMU_DADDR_ERROR_WRITE.
 350 */
 351 static int get_mmu_address(CPUSH4State * env, target_ulong * physical,
 352                            int *prot, target_ulong address,
 353                            int rw, int access_type)
 354 {
 355     int use_asid, n;
 356     tlb_t *matching = NULL;
 357
 358     use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0;
 359
 360     if (rw == 2) {
 361         n = find_itlb_entry(env, address, use_asid);
 362         if (n >= 0) {
 363             matching = &env->itlb[n];
 364             if (!(env->sr & SR_MD) && !(matching->pr & 2))
 365                 n = MMU_ITLB_VIOLATION;
 366             else
 367                 *prot = PAGE_EXEC;
 368         } else {
 369             n = find_utlb_entry(env, address, use_asid);
 370             if (n >= 0) {
 371                 n = copy_utlb_entry_itlb(env, n);
 372                 matching = &env->itlb[n];
 373                 if (!(env->sr & SR_MD) && !(matching->pr & 2)) {
 374                       n = MMU_ITLB_VIOLATION;
 375                 } else {
 376                     *prot = PAGE_READ | PAGE_EXEC;
 377                     if ((matching->pr & 1) && matching->d) {
 378                         *prot |= PAGE_WRITE;
 379                     }
 380                 }
 381             } else if (n == MMU_DTLB_MULTIPLE) {
 382                 n = MMU_ITLB_MULTIPLE;
 383             } else if (n == MMU_DTLB_MISS) {
 384                 n = MMU_ITLB_MISS;
 385             }
 386         }
 387     } else {
 388         n = find_utlb_entry(env, address, use_asid);
 389         if (n >= 0) {
 390             matching = &env->utlb[n];
 391             if (!(env->sr & SR_MD) && !(matching->pr & 2)) {
 392                 n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE :
 393                     MMU_DTLB_VIOLATION_READ;
 394             } else if ((rw == 1) && !(matching->pr & 1)) {
 395                 n = MMU_DTLB_VIOLATION_WRITE;
 396             } else if ((rw == 1) && !matching->d) {
 397                 n = MMU_DTLB_INITIAL_WRITE;
 398             } else {
 399                 *prot = PAGE_READ;
 400                 if ((matching->pr & 1) && matching->d) {
 401                     *prot |= PAGE_WRITE;
 402                 }
 403             }
 404         } else if (n == MMU_DTLB_MISS) {
 405             n = (rw == 1) ? MMU_DTLB_MISS_WRITE :
 406                 MMU_DTLB_MISS_READ;
 407         }
 408     }
 409     if (n >= 0) {
 410         n = MMU_OK;
 411         *physical = ((matching->ppn << 10) & ~(matching->size - 1)) |
 412             (address & (matching->size - 1));
 413     }
 414     return n;
 415 }
 416
 417 static int get_physical_address(CPUSH4State * env, target_ulong * physical,
 418                                 int *prot, target_ulong address,
 419                                 int rw, int access_type)
 420 {
 421     /* P1, P2 and P4 areas do not use translation */
 422     if ((address >= 0x80000000 && address < 0xc0000000) ||
 423         address >= 0xe0000000) {
 424         if (!(env->sr & SR_MD)
 425             && (address < 0xe0000000 || address >= 0xe4000000)) {
 426             /* Unauthorized access in user mode (only store queues are available) */
 427             fprintf(stderr, "Unauthorized access\n");
 428             if (rw == 0)
 429                 return MMU_DADDR_ERROR_READ;
 430             else if (rw == 1)
 431                 return MMU_DADDR_ERROR_WRITE;
 432             else
 433                 return MMU_IADDR_ERROR;
 434         }
 435         if (address >= 0x80000000 && address < 0xc0000000) {
 436             /* Mask upper 3 bits for P1 and P2 areas */
 437             *physical = address & 0x1fffffff;
 438         } else {
 439             *physical = address;
 440         }
 441         *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
 442         return MMU_OK;
 443     }
 444
 445     /* If MMU is disabled, return the corresponding physical page */
 446     if (!(env->mmucr & MMUCR_AT)) {
 447         *physical = address & 0x1FFFFFFF;
 448         *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
 449         return MMU_OK;
 450     }
 451
 452     /* We need to resort to the MMU */
 453     return get_mmu_address(env, physical, prot, address, rw, access_type);
 454 }
 455
 456 int superh_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
 457                                 int mmu_idx)
 458 {
 459     SuperHCPU *cpu = SUPERH_CPU(cs);
 460     CPUSH4State *env = &cpu->env;
 461     target_ulong physical;
 462     int prot, ret, access_type;
 463
 464     access_type = ACCESS_INT;
 465     ret =
 466         get_physical_address(env, &physical, &prot, address, rw,
 467                              access_type);
 468
 469     if (ret != MMU_OK) {
 470         env->tea = address;
 471         if (ret != MMU_DTLB_MULTIPLE && ret != MMU_ITLB_MULTIPLE) {
 472             env->pteh = (env->pteh & PTEH_ASID_MASK) |
 473                     (address & PTEH_VPN_MASK);
 474         }
 475         switch (ret) {
 476         case MMU_ITLB_MISS:
 477         case MMU_DTLB_MISS_READ:
 478             cs->exception_index = 0x040;
 479             break;
 480         case MMU_DTLB_MULTIPLE:
 481         case MMU_ITLB_MULTIPLE:
 482             cs->exception_index = 0x140;
 483             break;
 484         case MMU_ITLB_VIOLATION:
 485             cs->exception_index = 0x0a0;
 486             break;
 487         case MMU_DTLB_MISS_WRITE:
 488             cs->exception_index = 0x060;
 489             break;
 490         case MMU_DTLB_INITIAL_WRITE:
 491             cs->exception_index = 0x080;
 492             break;
 493         case MMU_DTLB_VIOLATION_READ:
 494             cs->exception_index = 0x0a0;
 495             break;
 496         case MMU_DTLB_VIOLATION_WRITE:
 497             cs->exception_index = 0x0c0;
 498             break;
 499         case MMU_IADDR_ERROR:
 500         case MMU_DADDR_ERROR_READ:
 501             cs->exception_index = 0x0e0;
 502             break;
 503         case MMU_DADDR_ERROR_WRITE:
 504             cs->exception_index = 0x100;
 505             break;
 506         default:
 507             cpu_abort(cs, "Unhandled MMU fault");
 508         }
 509         return 1;
 510     }
 511
 512     address &= TARGET_PAGE_MASK;
 513     physical &= TARGET_PAGE_MASK;
 514
 515     tlb_set_page(cs, address, physical, prot, mmu_idx, TARGET_PAGE_SIZE);
 516     return 0;
 517 }
 518
 519 hwaddr superh_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
 520 {
 521     SuperHCPU *cpu = SUPERH_CPU(cs);
 522     target_ulong physical;
 523     int prot;
 524
 525     get_physical_address(&cpu->env, &physical, &prot, addr, 0, 0);
 526     return physical;
 527 }
 528
 529 void cpu_load_tlb(CPUSH4State * env)
 530 {
 531     SuperHCPU *cpu = sh_env_get_cpu(env);
 532     int n = cpu_mmucr_urc(env->mmucr);
 533     tlb_t * entry = &env->utlb[n];
 534
 535     if (entry->v) {
 536         /* Overwriting valid entry in utlb. */
 537         target_ulong address = entry->vpn << 10;
 538         tlb_flush_page(CPU(cpu), address);
 539     }
 540
 541     /* Take values into cpu status from registers. */
 542     entry->asid = (uint8_t)cpu_pteh_asid(env->pteh);
 543     entry->vpn  = cpu_pteh_vpn(env->pteh);
 544     entry->v    = (uint8_t)cpu_ptel_v(env->ptel);
 545     entry->ppn  = cpu_ptel_ppn(env->ptel);
 546     entry->sz   = (uint8_t)cpu_ptel_sz(env->ptel);
 547     switch (entry->sz) {
 548     case 0: /* 00 */
 549         entry->size = 1024; /* 1K */
 550         break;
 551     case 1: /* 01 */
 552         entry->size = 1024 * 4; /* 4K */
 553         break;
 554     case 2: /* 10 */
 555         entry->size = 1024 * 64; /* 64K */
 556         break;
 557     case 3: /* 11 */
 558         entry->size = 1024 * 1024; /* 1M */
 559         break;
 560     default:
 561         cpu_abort(CPU(cpu), "Unhandled load_tlb");
 562         break;
 563     }
 564     entry->sh   = (uint8_t)cpu_ptel_sh(env->ptel);
 565     entry->c    = (uint8_t)cpu_ptel_c(env->ptel);
 566     entry->pr   = (uint8_t)cpu_ptel_pr(env->ptel);
 567     entry->d    = (uint8_t)cpu_ptel_d(env->ptel);
 568     entry->wt   = (uint8_t)cpu_ptel_wt(env->ptel);
 569     entry->sa   = (uint8_t)cpu_ptea_sa(env->ptea);
 570     entry->tc   = (uint8_t)cpu_ptea_tc(env->ptea);
 571 }
 572
 573  void cpu_sh4_invalidate_tlb(CPUSH4State *s)
 574 {
 575     int i;
 576
 577     /* UTLB */
 578     for (i = 0; i < UTLB_SIZE; i++) {
 579         tlb_t * entry = &s->utlb[i];
 580         entry->v = 0;
 581     }
 582     /* ITLB */
 583     for (i = 0; i < ITLB_SIZE; i++) {
 584         tlb_t * entry = &s->itlb[i];
 585         entry->v = 0;
 586     }
 587
 588     tlb_flush(CPU(sh_env_get_cpu(s)), 1);
 589 }
 590
 591 uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
 592                                        hwaddr addr)
 593 {
 594     int index = (addr & 0x00000300) >> 8;
 595     tlb_t * entry = &s->itlb[index];
 596
 597     return (entry->vpn  << 10) |
 598            (entry->v    <<  8) |
 599            (entry->asid);
 600 }
 601
 602 void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
 603                                     uint32_t mem_value)
 604 {
 605     uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
 606     uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
 607     uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
 608
 609     int index = (addr & 0x00000300) >> 8;
 610     tlb_t * entry = &s->itlb[index];
 611     if (entry->v) {
 612         /* Overwriting valid entry in itlb. */
 613         target_ulong address = entry->vpn << 10;
 614         tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
 615     }
 616     entry->asid = asid;
 617     entry->vpn = vpn;
 618     entry->v = v;
 619 }
 620
 621 uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
 622                                        hwaddr addr)
 623 {
 624     int array = (addr & 0x00800000) >> 23;
 625     int index = (addr & 0x00000300) >> 8;
 626     tlb_t * entry = &s->itlb[index];
 627
 628     if (array == 0) {
 629         /* ITLB Data Array 1 */
 630         return (entry->ppn << 10) |
 631                (entry->v   <<  8) |
 632                (entry->pr  <<  5) |
 633                ((entry->sz & 1) <<  6) |
 634                ((entry->sz & 2) <<  4) |
 635                (entry->c   <<  3) |
 636                (entry->sh  <<  1);
 637     } else {
 638         /* ITLB Data Array 2 */
 639         return (entry->tc << 1) |
 640                (entry->sa);
 641     }
 642 }
 643
 644 void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
 645                                     uint32_t mem_value)
 646 {
 647     int array = (addr & 0x00800000) >> 23;
 648     int index = (addr & 0x00000300) >> 8;
 649     tlb_t * entry = &s->itlb[index];
 650
 651     if (array == 0) {
 652         /* ITLB Data Array 1 */
 653         if (entry->v) {
 654             /* Overwriting valid entry in utlb. */
 655             target_ulong address = entry->vpn << 10;
 656             tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
 657         }
 658         entry->ppn = (mem_value & 0x1ffffc00) >> 10;
 659         entry->v   = (mem_value & 0x00000100) >> 8;
 660         entry->sz  = (mem_value & 0x00000080) >> 6 |
 661                      (mem_value & 0x00000010) >> 4;
 662         entry->pr  = (mem_value & 0x00000040) >> 5;
 663         entry->c   = (mem_value & 0x00000008) >> 3;
 664         entry->sh  = (mem_value & 0x00000002) >> 1;
 665     } else {
 666         /* ITLB Data Array 2 */
 667         entry->tc  = (mem_value & 0x00000008) >> 3;
 668         entry->sa  = (mem_value & 0x00000007);
 669     }
 670 }
 671
 672 uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
 673                                        hwaddr addr)
 674 {
 675     int index = (addr & 0x00003f00) >> 8;
 676     tlb_t * entry = &s->utlb[index];
 677
 678     increment_urc(s); /* per utlb access */
 679
 680     return (entry->vpn  << 10) |
 681            (entry->v    <<  8) |
 682            (entry->asid);
 683 }
 684
 685 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
 686                                     uint32_t mem_value)
 687 {
 688     int associate = addr & 0x0000080;
 689     uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
 690     uint8_t d = (uint8_t)((mem_value & 0x00000200) >> 9);
 691     uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
 692     uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
 693     int use_asid = (s->mmucr & MMUCR_SV) == 0 || (s->sr & SR_MD) == 0;
 694
 695     if (associate) {
 696         int i;
 697         tlb_t * utlb_match_entry = NULL;
 698         int needs_tlb_flush = 0;
 699
 700         /* search UTLB */
 701         for (i = 0; i < UTLB_SIZE; i++) {
 702             tlb_t * entry = &s->utlb[i];
 703             if (!entry->v)
 704                 continue;
 705
 706             if (entry->vpn == vpn
 707                 && (!use_asid || entry->asid == asid || entry->sh)) {
 708                 if (utlb_match_entry) {
 709                     CPUState *cs = CPU(sh_env_get_cpu(s));
 710
 711                     /* Multiple TLB Exception */
 712                     cs->exception_index = 0x140;
 713                     s->tea = addr;
 714                     break;
 715                 }
 716                 if (entry->v && !v)
 717                     needs_tlb_flush = 1;
 718                 entry->v = v;
 719                 entry->d = d;
 720                 utlb_match_entry = entry;
 721             }
 722             increment_urc(s); /* per utlb access */
 723         }
 724
 725         /* search ITLB */
 726         for (i = 0; i < ITLB_SIZE; i++) {
 727             tlb_t * entry = &s->itlb[i];
 728             if (entry->vpn == vpn
 729                 && (!use_asid || entry->asid == asid || entry->sh)) {
 730                 if (entry->v && !v)
 731                     needs_tlb_flush = 1;
 732                 if (utlb_match_entry)
 733                     *entry = *utlb_match_entry;
 734                 else
 735                     entry->v = v;
 736                 break;
 737             }
 738         }
 739
 740         if (needs_tlb_flush) {
 741             tlb_flush_page(CPU(sh_env_get_cpu(s)), vpn << 10);
 742         }
 743
 744     } else {
 745         int index = (addr & 0x00003f00) >> 8;
 746         tlb_t * entry = &s->utlb[index];
 747         if (entry->v) {
 748             CPUState *cs = CPU(sh_env_get_cpu(s));
 749
 750             /* Overwriting valid entry in utlb. */
 751             target_ulong address = entry->vpn << 10;
 752             tlb_flush_page(cs, address);
 753         }
 754         entry->asid = asid;
 755         entry->vpn = vpn;
 756         entry->d = d;
 757         entry->v = v;
 758         increment_urc(s);
 759     }
 760 }
 761
 762 uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
 763                                        hwaddr addr)
 764 {
 765     int array = (addr & 0x00800000) >> 23;
 766     int index = (addr & 0x00003f00) >> 8;
 767     tlb_t * entry = &s->utlb[index];
 768
 769     increment_urc(s); /* per utlb access */
 770
 771     if (array == 0) {
 772         /* ITLB Data Array 1 */
 773         return (entry->ppn << 10) |
 774                (entry->v   <<  8) |
 775                (entry->pr  <<  5) |
 776                ((entry->sz & 1) <<  6) |
 777                ((entry->sz & 2) <<  4) |
 778                (entry->c   <<  3) |
 779                (entry->d   <<  2) |
 780                (entry->sh  <<  1) |
 781                (entry->wt);
 782     } else {
 783         /* ITLB Data Array 2 */
 784         return (entry->tc << 1) |
 785                (entry->sa);
 786     }
 787 }
 788
 789 void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
 790                                     uint32_t mem_value)
 791 {
 792     int array = (addr & 0x00800000) >> 23;
 793     int index = (addr & 0x00003f00) >> 8;
 794     tlb_t * entry = &s->utlb[index];
 795
 796     increment_urc(s); /* per utlb access */
 797
 798     if (array == 0) {
 799         /* UTLB Data Array 1 */
 800         if (entry->v) {
 801             /* Overwriting valid entry in utlb. */
 802             target_ulong address = entry->vpn << 10;
 803             tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
 804         }
 805         entry->ppn = (mem_value & 0x1ffffc00) >> 10;
 806         entry->v   = (mem_value & 0x00000100) >> 8;
 807         entry->sz  = (mem_value & 0x00000080) >> 6 |
 808                      (mem_value & 0x00000010) >> 4;
 809         entry->pr  = (mem_value & 0x00000060) >> 5;
 810         entry->c   = (mem_value & 0x00000008) >> 3;
 811         entry->d   = (mem_value & 0x00000004) >> 2;
 812         entry->sh  = (mem_value & 0x00000002) >> 1;
 813         entry->wt  = (mem_value & 0x00000001);
 814     } else {
 815         /* UTLB Data Array 2 */
 816         entry->tc = (mem_value & 0x00000008) >> 3;
 817         entry->sa = (mem_value & 0x00000007);
 818     }
 819 }
 820
 821 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
 822 {
 823     int n;
 824     int use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0;
 825
 826     /* check area */
 827     if (env->sr & SR_MD) {
 828         /* For previledged mode, P2 and P4 area is not cachable. */
 829         if ((0xA0000000 <= addr && addr < 0xC0000000) || 0xE0000000 <= addr)
 830             return 0;
 831     } else {
 832         /* For user mode, only U0 area is cachable. */
 833         if (0x80000000 <= addr)
 834             return 0;
 835     }
 836
 837     /*
 838      * TODO : Evaluate CCR and check if the cache is on or off.
 839      *        Now CCR is not in CPUSH4State, but in SH7750State.
 840      *        When you move the ccr into CPUSH4State, the code will be
 841      *        as follows.
 842      */
 843 #if 0
 844     /* check if operand cache is enabled or not. */
 845     if (!(env->ccr & 1))
 846         return 0;
 847 #endif
 848
 849     /* if MMU is off, no check for TLB. */
 850     if (env->mmucr & MMUCR_AT)
 851         return 1;
 852
 853     /* check TLB */
 854     n = find_tlb_entry(env, addr, env->itlb, ITLB_SIZE, use_asid);
 855     if (n >= 0)
 856         return env->itlb[n].c;
 857
 858     n = find_tlb_entry(env, addr, env->utlb, UTLB_SIZE, use_asid);
 859     if (n >= 0)
 860         return env->utlb[n].c;
 861
 862     return 0;
 863 }
 864
 865 #endif
 866
 867 bool superh_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
 868 {
 869     if (interrupt_request & CPU_INTERRUPT_HARD) {
 870         superh_cpu_do_interrupt(cs);
 871         return true;
 872     }
 873     return false;
 874 }