gnu/dist/gdb6/sim/common/sim-core.c

   1 /* The common simulator framework for GDB, the GNU Debugger.
   2
   3    Copyright 2002 Free Software Foundation, Inc.
   4
   5    Contributed by Andrew Cagney and Red Hat.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24
  25 #ifndef SIM_CORE_C
  26 #define SIM_CORE_C
  27
  28 #include "sim-main.h"
  29 #include "sim-assert.h"
  30
  31 #if (WITH_HW)
  32 #include "sim-hw.h"
  33 #endif
  34
  35 /* "core" module install handler.
  36
  37    This is called via sim_module_install to install the "core"
  38    subsystem into the simulator.  */
  39
  40 #if EXTERN_SIM_CORE_P
  41 static MODULE_INIT_FN sim_core_init;
  42 static MODULE_UNINSTALL_FN sim_core_uninstall;
  43 #endif
  44
  45 #if EXTERN_SIM_CORE_P
  46 SIM_RC
  47 sim_core_install (SIM_DESC sd)
  48 {
  49   SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
  50
  51   /* establish the other handlers */
  52   sim_module_add_uninstall_fn (sd, sim_core_uninstall);
  53   sim_module_add_init_fn (sd, sim_core_init);
  54
  55   /* establish any initial data structures - none */
  56   return SIM_RC_OK;
  57 }
  58 #endif
  59
  60
  61 /* Uninstall the "core" subsystem from the simulator.  */
  62
  63 #if EXTERN_SIM_CORE_P
  64 static void
  65 sim_core_uninstall (SIM_DESC sd)
  66 {
  67   sim_core *core = STATE_CORE(sd);
  68   unsigned map;
  69   /* blow away any mappings */
  70   for (map = 0; map < nr_maps; map++) {
  71     sim_core_mapping *curr = core->common.map[map].first;
  72     while (curr != NULL) {
  73       sim_core_mapping *tbd = curr;
  74       curr = curr->next;
  75       if (tbd->free_buffer != NULL) {
  76         SIM_ASSERT(tbd->buffer != NULL);
  77         zfree(tbd->free_buffer);
  78       }
  79       zfree(tbd);
  80     }
  81     core->common.map[map].first = NULL;
  82   }
  83 }
  84 #endif
  85
  86
  87 #if EXTERN_SIM_CORE_P
  88 static SIM_RC
  89 sim_core_init (SIM_DESC sd)
  90 {
  91   /* Nothing to do */
  92   return SIM_RC_OK;
  93 }
  94 #endif
  95
  96
  97
  98 #ifndef SIM_CORE_SIGNAL
  99 #define SIM_CORE_SIGNAL(SD,CPU,CIA,MAP,NR_BYTES,ADDR,TRANSFER,ERROR) \
 100 sim_core_signal ((SD), (CPU), (CIA), (MAP), (NR_BYTES), (ADDR), (TRANSFER), (ERROR))
 101 #endif
 102
 103 #if EXTERN_SIM_CORE_P
 104 void
 105 sim_core_signal (SIM_DESC sd,
 106                  sim_cpu *cpu,
 107                  sim_cia cia,
 108                  unsigned map,
 109                  int nr_bytes,
 110                  address_word addr,
 111                  transfer_type transfer,
 112                  sim_core_signals sig)
 113 {
 114   const char *copy = (transfer == read_transfer ? "read" : "write");
 115   address_word ip = CIA_ADDR (cia);
 116   switch (sig)
 117     {
 118     case sim_core_unmapped_signal:
 119       sim_io_eprintf (sd, "core: %d byte %s to unmapped address 0x%lx at 0x%lx\n",
 120                       nr_bytes, copy, (unsigned long) addr, (unsigned long) ip);
 121       sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGSEGV);
 122       break;
 123     case sim_core_unaligned_signal:
 124       sim_io_eprintf (sd, "core: %d byte misaligned %s to address 0x%lx at 0x%lx\n",
 125                       nr_bytes, copy, (unsigned long) addr, (unsigned long) ip);
 126       sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGBUS);
 127       break;
 128     default:
 129       sim_engine_abort (sd, cpu, cia,
 130                         "sim_core_signal - internal error - bad switch");
 131     }
 132 }
 133 #endif
 134
 135
 136 #if EXTERN_SIM_CORE_P
 137 static sim_core_mapping *
 138 new_sim_core_mapping (SIM_DESC sd,
 139                       int level,
 140                       int space,
 141                       address_word addr,
 142                       address_word nr_bytes,
 143                       unsigned modulo,
 144 #if WITH_HW
 145                       struct hw *device,
 146 #else
 147                       device *device,
 148 #endif
 149                       void *buffer,
 150                       void *free_buffer)
 151 {
 152   sim_core_mapping *new_mapping = ZALLOC(sim_core_mapping);
 153   /* common */
 154   new_mapping->level = level;
 155   new_mapping->space = space;
 156   new_mapping->base = addr;
 157   new_mapping->nr_bytes = nr_bytes;
 158   new_mapping->bound = addr + (nr_bytes - 1);
 159   if (modulo == 0)
 160     new_mapping->mask = (unsigned) 0 - 1;
 161   else
 162     new_mapping->mask = modulo - 1;
 163   new_mapping->buffer = buffer;
 164   new_mapping->free_buffer = free_buffer;
 165   new_mapping->device = device;
 166   return new_mapping;
 167 }
 168 #endif
 169
 170
 171 #if EXTERN_SIM_CORE_P
 172 static void
 173 sim_core_map_attach (SIM_DESC sd,
 174                      sim_core_map *access_map,
 175                      int level,
 176                      int space,
 177                      address_word addr,
 178                      address_word nr_bytes,
 179                      unsigned modulo,
 180 #if WITH_HW
 181                      struct hw *client, /*callback/default*/
 182 #else
 183                      device *client, /*callback/default*/
 184 #endif
 185                      void *buffer, /*raw_memory*/
 186                      void *free_buffer) /*raw_memory*/
 187 {
 188   /* find the insertion point for this additional mapping and then
 189      insert */
 190   sim_core_mapping *next_mapping;
 191   sim_core_mapping **last_mapping;
 192
 193   SIM_ASSERT ((client == NULL) != (buffer == NULL));
 194   SIM_ASSERT ((client == NULL) >= (free_buffer != NULL));
 195
 196   /* actually do occasionally get a zero size map */
 197   if (nr_bytes == 0)
 198     {
 199 #if (WITH_DEVICES)
 200       device_error(client, "called on sim_core_map_attach with size zero");
 201 #endif
 202 #if (WITH_HW)
 203       sim_hw_abort (sd, client, "called on sim_core_map_attach with size zero");
 204 #endif
 205       sim_io_error (sd, "called on sim_core_map_attach with size zero");
 206     }
 207
 208   /* find the insertion point (between last/next) */
 209   next_mapping = access_map->first;
 210   last_mapping = &access_map->first;
 211   while(next_mapping != NULL
 212         && (next_mapping->level < level
 213             || (next_mapping->level == level
 214                 && next_mapping->bound < addr)))
 215     {
 216       /* provided levels are the same */
 217       /* assert: next_mapping->base > all bases before next_mapping */
 218       /* assert: next_mapping->bound >= all bounds before next_mapping */
 219       last_mapping = &next_mapping->next;
 220       next_mapping = next_mapping->next;
 221     }
 222
 223   /* check insertion point correct */
 224   SIM_ASSERT (next_mapping == NULL || next_mapping->level >= level);
 225   if (next_mapping != NULL && next_mapping->level == level
 226       && next_mapping->base < (addr + (nr_bytes - 1)))
 227     {
 228 #if (WITH_DEVICES)
 229       device_error (client, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
 230                     space,
 231                     (long) addr,
 232                     (long) (addr + nr_bytes - 1),
 233                     (long) nr_bytes,
 234                     next_mapping->space,
 235                     (long) next_mapping->base,
 236                     (long) next_mapping->bound,
 237                     (long) next_mapping->nr_bytes);
 238 #endif
 239 #if WITH_HW
 240       sim_hw_abort (sd, client, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
 241                     space,
 242                     (long) addr,
 243                     (long) (addr + (nr_bytes - 1)),
 244                     (long) nr_bytes,
 245                     next_mapping->space,
 246                     (long) next_mapping->base,
 247                     (long) next_mapping->bound,
 248                     (long) next_mapping->nr_bytes);
 249 #endif
 250       sim_io_error (sd, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
 251                     space,
 252                     (long) addr,
 253                     (long) (addr + (nr_bytes - 1)),
 254                     (long) nr_bytes,
 255                     next_mapping->space,
 256                     (long) next_mapping->base,
 257                     (long) next_mapping->bound,
 258                     (long) next_mapping->nr_bytes);
 259   }
 260
 261   /* create/insert the new mapping */
 262   *last_mapping = new_sim_core_mapping(sd,
 263                                        level,
 264                                        space, addr, nr_bytes, modulo,
 265                                        client, buffer, free_buffer);
 266   (*last_mapping)->next = next_mapping;
 267 }
 268 #endif
 269
 270
 271 /* Attach memory or a memory mapped device to the simulator.
 272    See sim-core.h for a full description.  */
 273
 274 #if EXTERN_SIM_CORE_P
 275 void
 276 sim_core_attach (SIM_DESC sd,
 277                  sim_cpu *cpu,
 278                  int level,
 279                  unsigned mapmask,
 280                  int space,
 281                  address_word addr,
 282                  address_word nr_bytes,
 283                  unsigned modulo,
 284 #if WITH_HW
 285                  struct hw *client,
 286 #else
 287                  device *client,
 288 #endif
 289                  void *optional_buffer)
 290 {
 291   sim_core *memory = STATE_CORE(sd);
 292   unsigned map;
 293   void *buffer;
 294   void *free_buffer;
 295
 296   /* check for for attempt to use unimplemented per-processor core map */
 297   if (cpu != NULL)
 298     sim_io_error (sd, "sim_core_map_attach - processor specific memory map not yet supported");
 299
 300   /* verify modulo memory */
 301   if (!WITH_MODULO_MEMORY && modulo != 0)
 302     {
 303 #if (WITH_DEVICES)
 304       device_error (client, "sim_core_attach - internal error - modulo memory disabled");
 305 #endif
 306 #if (WITH_HW)
 307       sim_hw_abort (sd, client, "sim_core_attach - internal error - modulo memory disabled");
 308 #endif
 309       sim_io_error (sd, "sim_core_attach - internal error - modulo memory disabled");
 310     }
 311   if (client != NULL && modulo != 0)
 312     {
 313 #if (WITH_DEVICES)
 314       device_error (client, "sim_core_attach - internal error - modulo and callback memory conflict");
 315 #endif
 316 #if (WITH_HW)
 317       sim_hw_abort (sd, client, "sim_core_attach - internal error - modulo and callback memory conflict");
 318 #endif
 319       sim_io_error (sd, "sim_core_attach - internal error - modulo and callback memory conflict");
 320     }
 321   if (modulo != 0)
 322     {
 323       unsigned mask = modulo - 1;
 324       /* any zero bits */
 325       while (mask >= sizeof (unsigned64)) /* minimum modulo */
 326         {
 327           if ((mask & 1) == 0)
 328             mask = 0;
 329           else
 330             mask >>= 1;
 331         }
 332       if (mask != sizeof (unsigned64) - 1)
 333         {
 334 #if (WITH_DEVICES)
 335           device_error (client, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
 336 #endif
 337 #if (WITH_HW)
 338           sim_hw_abort (sd, client, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
 339 #endif
 340           sim_io_error (sd, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
 341         }
 342     }
 343
 344   /* verify consistency between device and buffer */
 345   if (client != NULL && optional_buffer != NULL)
 346     {
 347 #if (WITH_DEVICES)
 348       device_error (client, "sim_core_attach - internal error - conflicting buffer and attach arguments");
 349 #endif
 350 #if (WITH_HW)
 351       sim_hw_abort (sd, client, "sim_core_attach - internal error - conflicting buffer and attach arguments");
 352 #endif
 353       sim_io_error (sd, "sim_core_attach - internal error - conflicting buffer and attach arguments");
 354     }
 355   if (client == NULL)
 356     {
 357       if (optional_buffer == NULL)
 358         {
 359           int padding = (addr % sizeof (unsigned64));
 360           unsigned long bytes = (modulo == 0 ? nr_bytes : modulo) + padding;
 361           free_buffer = zalloc (bytes);
 362           buffer = (char*) free_buffer + padding;
 363         }
 364       else
 365         {
 366           buffer = optional_buffer;
 367           free_buffer = NULL;
 368         }
 369     }
 370   else
 371     {
 372       /* a device */
 373       buffer = NULL;
 374       free_buffer = NULL;
 375     }
 376
 377   /* attach the region to all applicable access maps */
 378   for (map = 0;
 379        map < nr_maps;
 380        map++)
 381     {
 382       if (mapmask & (1 << map))
 383         {
 384           sim_core_map_attach (sd, &memory->common.map[map],
 385                                level, space, addr, nr_bytes, modulo,
 386                                client, buffer, free_buffer);
 387           free_buffer = NULL;
 388         }
 389     }
 390
 391   /* Just copy this map to each of the processor specific data structures.
 392      FIXME - later this will be replaced by true processor specific
 393      maps. */
 394   {
 395     int i;
 396     for (i = 0; i < MAX_NR_PROCESSORS; i++)
 397       {
 398         CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
 399       }
 400   }
 401 }
 402 #endif
 403
 404
 405 /* Remove any memory reference related to this address */
 406 #if EXTERN_SIM_CORE_P
 407 static void
 408 sim_core_map_detach (SIM_DESC sd,
 409                      sim_core_map *access_map,
 410                      int level,
 411                      int space,
 412                      address_word addr)
 413 {
 414   sim_core_mapping **entry;
 415   for (entry = &access_map->first;
 416        (*entry) != NULL;
 417        entry = &(*entry)->next)
 418     {
 419       if ((*entry)->base == addr
 420           && (*entry)->level == level
 421           && (*entry)->space == space)
 422         {
 423           sim_core_mapping *dead = (*entry);
 424           (*entry) = dead->next;
 425           if (dead->free_buffer != NULL)
 426             zfree (dead->free_buffer);
 427           zfree (dead);
 428           return;
 429         }
 430     }
 431 }
 432 #endif
 433
 434 #if EXTERN_SIM_CORE_P
 435 void
 436 sim_core_detach (SIM_DESC sd,
 437                  sim_cpu *cpu,
 438                  int level,
 439                  int address_space,
 440                  address_word addr)
 441 {
 442   sim_core *memory = STATE_CORE (sd);
 443   unsigned map;
 444   for (map = 0; map < nr_maps; map++)
 445     {
 446       sim_core_map_detach (sd, &memory->common.map[map],
 447                            level, address_space, addr);
 448     }
 449   /* Just copy this update to each of the processor specific data
 450      structures.  FIXME - later this will be replaced by true
 451      processor specific maps. */
 452   {
 453     int i;
 454     for (i = 0; i < MAX_NR_PROCESSORS; i++)
 455       {
 456         CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
 457       }
 458   }
 459 }
 460 #endif
 461
 462
 463 STATIC_INLINE_SIM_CORE\
 464 (sim_core_mapping *)
 465 sim_core_find_mapping(sim_core_common *core,
 466                       unsigned map,
 467                       address_word addr,
 468                       unsigned nr_bytes,
 469                       transfer_type transfer,
 470                       int abort, /*either 0 or 1 - hint to inline/-O */
 471                       sim_cpu *cpu, /* abort => cpu != NULL */
 472                       sim_cia cia)
 473 {
 474   sim_core_mapping *mapping = core->map[map].first;
 475   ASSERT ((addr & (nr_bytes - 1)) == 0); /* must be aligned */
 476   ASSERT ((addr + (nr_bytes - 1)) >= addr); /* must not wrap */
 477   ASSERT (!abort || cpu != NULL); /* abort needs a non null CPU */
 478   while (mapping != NULL)
 479     {
 480       if (addr >= mapping->base
 481           && (addr + (nr_bytes - 1)) <= mapping->bound)
 482         return mapping;
 483       mapping = mapping->next;
 484     }
 485   if (abort)
 486     {
 487       SIM_CORE_SIGNAL (CPU_STATE (cpu), cpu, cia, map, nr_bytes, addr, transfer,
 488                        sim_core_unmapped_signal);
 489     }
 490   return NULL;
 491 }
 492
 493
 494 STATIC_INLINE_SIM_CORE\
 495 (void *)
 496 sim_core_translate (sim_core_mapping *mapping,
 497                     address_word addr)
 498 {
 499   if (WITH_MODULO_MEMORY)
 500     return (void *)((unsigned8 *) mapping->buffer
 501                     + ((addr - mapping->base) & mapping->mask));
 502   else
 503     return (void *)((unsigned8 *) mapping->buffer
 504                     + addr - mapping->base);
 505 }
 506
 507
 508 #if EXTERN_SIM_CORE_P
 509 unsigned
 510 sim_core_read_buffer (SIM_DESC sd,
 511                       sim_cpu *cpu,
 512                       unsigned map,
 513                       void *buffer,
 514                       address_word addr,
 515                       unsigned len)
 516 {
 517   sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
 518   unsigned count = 0;
 519   while (count < len)
 520  {
 521     unsigned_word raddr = addr + count;
 522     sim_core_mapping *mapping =
 523       sim_core_find_mapping (core, map,
 524                             raddr, /*nr-bytes*/1,
 525                             read_transfer,
 526                             0 /*dont-abort*/, NULL, NULL_CIA);
 527     if (mapping == NULL)
 528       break;
 529 #if (WITH_DEVICES)
 530     if (mapping->device != NULL)
 531       {
 532         int nr_bytes = len - count;
 533         sim_cia cia = cpu ? CIA_GET (cpu) : NULL_CIA;
 534         if (raddr + nr_bytes - 1> mapping->bound)
 535           nr_bytes = mapping->bound - raddr + 1;
 536         if (device_io_read_buffer (mapping->device,
 537                                    (unsigned_1*)buffer + count,
 538                                    mapping->space,
 539                                    raddr,
 540                                    nr_bytes,
 541                                    sd,
 542                                    cpu,
 543                                    cia) != nr_bytes)
 544           break;
 545         count += nr_bytes;
 546         continue;
 547       }
 548 #endif
 549 #if (WITH_HW)
 550     if (mapping->device != NULL)
 551       {
 552         int nr_bytes = len - count;
 553         if (raddr + nr_bytes - 1> mapping->bound)
 554           nr_bytes = mapping->bound - raddr + 1;
 555         if (sim_hw_io_read_buffer (sd, mapping->device,
 556                                    (unsigned_1*)buffer + count,
 557                                    mapping->space,
 558                                    raddr,
 559                                    nr_bytes) != nr_bytes)
 560           break;
 561         count += nr_bytes;
 562         continue;
 563       }
 564 #endif
 565     ((unsigned_1*)buffer)[count] =
 566       *(unsigned_1*)sim_core_translate(mapping, raddr);
 567     count += 1;
 568  }
 569   return count;
 570 }
 571 #endif
 572
 573
 574 #if EXTERN_SIM_CORE_P
 575 unsigned
 576 sim_core_write_buffer (SIM_DESC sd,
 577                        sim_cpu *cpu,
 578                        unsigned map,
 579                        const void *buffer,
 580                        address_word addr,
 581                        unsigned len)
 582 {
 583   sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
 584   unsigned count = 0;
 585   while (count < len)
 586     {
 587       unsigned_word raddr = addr + count;
 588       sim_core_mapping *mapping =
 589         sim_core_find_mapping (core, map,
 590                                raddr, /*nr-bytes*/1,
 591                                write_transfer,
 592                                0 /*dont-abort*/, NULL, NULL_CIA);
 593       if (mapping == NULL)
 594         break;
 595 #if (WITH_DEVICES)
 596       if (WITH_CALLBACK_MEMORY
 597           && mapping->device != NULL)
 598         {
 599           int nr_bytes = len - count;
 600           sim_cia cia = cpu ? CIA_GET (cpu) : NULL_CIA;
 601           if (raddr + nr_bytes - 1 > mapping->bound)
 602             nr_bytes = mapping->bound - raddr + 1;
 603           if (device_io_write_buffer (mapping->device,
 604                                       (unsigned_1*)buffer + count,
 605                                       mapping->space,
 606                                       raddr,
 607                                       nr_bytes,
 608                                       sd,
 609                                       cpu,
 610                                       cia) != nr_bytes)
 611             break;
 612           count += nr_bytes;
 613           continue;
 614         }
 615 #endif
 616 #if (WITH_HW)
 617       if (WITH_CALLBACK_MEMORY
 618           && mapping->device != NULL)
 619         {
 620           int nr_bytes = len - count;
 621           if (raddr + nr_bytes - 1 > mapping->bound)
 622             nr_bytes = mapping->bound - raddr + 1;
 623           if (sim_hw_io_write_buffer (sd, mapping->device,
 624                                       (unsigned_1*)buffer + count,
 625                                       mapping->space,
 626                                       raddr,
 627                                       nr_bytes) != nr_bytes)
 628             break;
 629           count += nr_bytes;
 630           continue;
 631         }
 632 #endif
 633       *(unsigned_1*)sim_core_translate(mapping, raddr) =
 634         ((unsigned_1*)buffer)[count];
 635       count += 1;
 636     }
 637   return count;
 638 }
 639 #endif
 640
 641
 642 #if EXTERN_SIM_CORE_P
 643 void
 644 sim_core_set_xor (SIM_DESC sd,
 645                   sim_cpu *cpu,
 646                   int is_xor)
 647 {
 648   /* set up the XOR map if required. */
 649   if (WITH_XOR_ENDIAN) {
 650     {
 651       sim_core *core = STATE_CORE (sd);
 652       sim_cpu_core *cpu_core = (cpu != NULL ? CPU_CORE (cpu) : NULL);
 653       if (cpu_core != NULL)
 654         {
 655           int i = 1;
 656           unsigned mask;
 657           if (is_xor)
 658             mask = WITH_XOR_ENDIAN - 1;
 659           else
 660             mask = 0;
 661           while (i - 1 < WITH_XOR_ENDIAN)
 662             {
 663               cpu_core->xor[i-1] = mask;
 664               mask = (mask << 1) & (WITH_XOR_ENDIAN - 1);
 665               i = (i << 1);
 666             }
 667         }
 668       else
 669         {
 670           if (is_xor)
 671             core->byte_xor = WITH_XOR_ENDIAN - 1;
 672           else
 673             core->byte_xor = 0;
 674         }
 675     }
 676   }
 677   else {
 678     if (is_xor)
 679       sim_engine_abort (sd, NULL, NULL_CIA,
 680                         "Attempted to enable xor-endian mode when permenantly disabled.");
 681   }
 682 }
 683 #endif
 684
 685
 686 #if EXTERN_SIM_CORE_P
 687 static void
 688 reverse_n (unsigned_1 *dest,
 689            const unsigned_1 *src,
 690            int nr_bytes)
 691 {
 692   int i;
 693   for (i = 0; i < nr_bytes; i++)
 694     {
 695       dest [nr_bytes - i - 1] = src [i];
 696     }
 697 }
 698 #endif
 699
 700
 701 #if EXTERN_SIM_CORE_P
 702 unsigned
 703 sim_core_xor_read_buffer (SIM_DESC sd,
 704                           sim_cpu *cpu,
 705                           unsigned map,
 706                           void *buffer,
 707                           address_word addr,
 708                           unsigned nr_bytes)
 709 {
 710   address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
 711   if (!WITH_XOR_ENDIAN || !byte_xor)
 712     return sim_core_read_buffer (sd, cpu, map, buffer, addr, nr_bytes);
 713   else
 714     /* only break up transfers when xor-endian is both selected and enabled */
 715     {
 716       unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero-sized array */
 717       unsigned nr_transfered = 0;
 718       address_word start = addr;
 719       unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
 720       address_word stop;
 721       /* initial and intermediate transfers are broken when they cross
 722          an XOR endian boundary */
 723       while (nr_transfered + nr_this_transfer < nr_bytes)
 724         /* initial/intermediate transfers */
 725         {
 726           /* since xor-endian is enabled stop^xor defines the start
 727              address of the transfer */
 728           stop = start + nr_this_transfer - 1;
 729           SIM_ASSERT (start <= stop);
 730           SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
 731           if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
 732               != nr_this_transfer)
 733             return nr_transfered;
 734           reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
 735           nr_transfered += nr_this_transfer;
 736           nr_this_transfer = WITH_XOR_ENDIAN;
 737           start = stop + 1;
 738         }
 739       /* final transfer */
 740       nr_this_transfer = nr_bytes - nr_transfered;
 741       stop = start + nr_this_transfer - 1;
 742       SIM_ASSERT (stop == (addr + nr_bytes - 1));
 743       if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
 744           != nr_this_transfer)
 745         return nr_transfered;
 746       reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
 747       return nr_bytes;
 748     }
 749 }
 750 #endif
 751
 752
 753 #if EXTERN_SIM_CORE_P
 754 unsigned
 755 sim_core_xor_write_buffer (SIM_DESC sd,
 756                            sim_cpu *cpu,
 757                            unsigned map,
 758                            const void *buffer,
 759                            address_word addr,
 760                            unsigned nr_bytes)
 761 {
 762   address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
 763   if (!WITH_XOR_ENDIAN || !byte_xor)
 764     return sim_core_write_buffer (sd, cpu, map, buffer, addr, nr_bytes);
 765   else
 766     /* only break up transfers when xor-endian is both selected and enabled */
 767     {
 768       unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero sized array */
 769       unsigned nr_transfered = 0;
 770       address_word start = addr;
 771       unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
 772       address_word stop;
 773       /* initial and intermediate transfers are broken when they cross
 774          an XOR endian boundary */
 775       while (nr_transfered + nr_this_transfer < nr_bytes)
 776         /* initial/intermediate transfers */
 777         {
 778           /* since xor-endian is enabled stop^xor defines the start
 779              address of the transfer */
 780           stop = start + nr_this_transfer - 1;
 781           SIM_ASSERT (start <= stop);
 782           SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
 783           reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
 784           if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
 785               != nr_this_transfer)
 786             return nr_transfered;
 787           nr_transfered += nr_this_transfer;
 788           nr_this_transfer = WITH_XOR_ENDIAN;
 789           start = stop + 1;
 790         }
 791       /* final transfer */
 792       nr_this_transfer = nr_bytes - nr_transfered;
 793       stop = start + nr_this_transfer - 1;
 794       SIM_ASSERT (stop == (addr + nr_bytes - 1));
 795       reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
 796       if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
 797           != nr_this_transfer)
 798         return nr_transfered;
 799       return nr_bytes;
 800     }
 801 }
 802 #endif
 803
 804 #if EXTERN_SIM_CORE_P
 805 void *
 806 sim_core_trans_addr (SIM_DESC sd,
 807                      sim_cpu *cpu,
 808                      unsigned map,
 809                      address_word addr)
 810 {
 811   sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
 812   sim_core_mapping *mapping =
 813     sim_core_find_mapping (core, map,
 814                            addr, /*nr-bytes*/1,
 815                            write_transfer,
 816                            0 /*dont-abort*/, NULL, NULL_CIA);
 817   if (mapping == NULL)
 818     return NULL;
 819   return sim_core_translate(mapping, addr);
 820 }
 821 #endif
 822
 823
 824
 825 /* define the read/write 1/2/4/8/16/word functions */
 826
 827 #define N 16
 828 #include "sim-n-core.h"
 829
 830 #define N 8
 831 #include "sim-n-core.h"
 832
 833 #define N 7
 834 #define M 8
 835 #include "sim-n-core.h"
 836
 837 #define N 6
 838 #define M 8
 839 #include "sim-n-core.h"
 840
 841 #define N 5
 842 #define M 8
 843 #include "sim-n-core.h"
 844
 845 #define N 4
 846 #include "sim-n-core.h"
 847
 848 #define N 3
 849 #define M 4
 850 #include "sim-n-core.h"
 851
 852 #define N 2
 853 #include "sim-n-core.h"
 854
 855 #define N 1
 856 #include "sim-n-core.h"
 857
 858 #endif