libpcsxcore/psxmem.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team              *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA.           *
  18  ***************************************************************************/
  19
  20 /*
  21 * PSX memory functions.
  22 */
  23
  24 // TODO: Implement caches & cycle penalty.
  25
  26 #include "psxmem.h"
  27 #include "psxmem_map.h"
  28 #include "r3000a.h"
  29 #include "psxhw.h"
  30 #include "debug.h"
  31
  32 #include "memmap.h"
  33
  34 #ifdef USE_LIBRETRO_VFS
  35 #include <streams/file_stream_transforms.h>
  36 #endif
  37
  38 #ifndef MAP_ANONYMOUS
  39 #define MAP_ANONYMOUS MAP_ANON
  40 #endif
  41
  42 #ifndef NDEBUG
  43 #include "debug.h"
  44 #else
  45 void DebugCheckBP(u32 address, enum breakpoint_types type) {}
  46 #endif
  47
  48 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
  49                 enum psxMapTag tag);
  50 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
  51
  52 void *psxMap(unsigned long addr, size_t size, int is_fixed,
  53                 enum psxMapTag tag)
  54 {
  55 #ifdef LIGHTREC
  56 #ifdef MAP_FIXED_NOREPLACE
  57         int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE;
  58 #else
  59         int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED;
  60 #endif
  61 #else
  62         int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  63 #endif
  64
  65         int try_ = 0;
  66         unsigned long mask;
  67         void *req, *ret;
  68
  69 retry:
  70         if (psxMapHook != NULL) {
  71                 ret = psxMapHook(addr, size, 0, tag);
  72                 if (ret == NULL)
  73                         return NULL;
  74         }
  75         else {
  76                 /* avoid MAP_FIXED, it overrides existing mappings.. */
  77                 /* if (is_fixed)
  78                         flags |= MAP_FIXED; */
  79
  80                 req = (void *)addr;
  81                 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
  82                 if (ret == MAP_FAILED)
  83                         return NULL;
  84         }
  85
  86         if (addr != 0 && ret != (void *)addr) {
  87                 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
  88                         addr, ret);
  89
  90                 if (is_fixed) {
  91                         psxUnmap(ret, size, tag);
  92                         return NULL;
  93                 }
  94
  95                 if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2)
  96                 {
  97                         psxUnmap(ret, size, tag);
  98
  99                         // try to use similarly aligned memory instead
 100                         // (recompiler needs this)
 101                         mask = try_ ? 0xffff : 0xffffff;
 102                         addr = ((unsigned long)ret + mask) & ~mask;
 103                         try_++;
 104                         goto retry;
 105                 }
 106         }
 107
 108         return ret;
 109 }
 110
 111 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
 112 {
 113         if (psxUnmapHook != NULL) {
 114                 psxUnmapHook(ptr, size, tag);
 115                 return;
 116         }
 117
 118         if (ptr)
 119                 munmap(ptr, size);
 120 }
 121
 122 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
 123 s8 *psxP = NULL; // Parallel Port (64K)
 124 s8 *psxR = NULL; // BIOS ROM (512K)
 125 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
 126
 127 u8 **psxMemWLUT = NULL;
 128 u8 **psxMemRLUT = NULL;
 129
 130 /*  Playstation Memory Map (from Playstation doc by Joshua Walker)
 131 0x0000_0000-0x0000_ffff         Kernel (64K)
 132 0x0001_0000-0x001f_ffff         User Memory (1.9 Meg)
 133
 134 0x1f00_0000-0x1f00_ffff         Parallel Port (64K)
 135
 136 0x1f80_0000-0x1f80_03ff         Scratch Pad (1024 bytes)
 137
 138 0x1f80_1000-0x1f80_2fff         Hardware Registers (8K)
 139
 140 0x1fc0_0000-0x1fc7_ffff         BIOS (512K)
 141
 142 0x8000_0000-0x801f_ffff         Kernel and User Memory Mirror (2 Meg) Cached
 143 0x9fc0_0000-0x9fc7_ffff         BIOS Mirror (512K) Cached
 144
 145 0xa000_0000-0xa01f_ffff         Kernel and User Memory Mirror (2 Meg) Uncached
 146 0xbfc0_0000-0xbfc7_ffff         BIOS Mirror (512K) Uncached
 147 */
 148
 149 int psxMemInit() {
 150         int i;
 151
 152         psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 153         psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 154         memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
 155         memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
 156
 157 #ifdef LIGHTREC
 158         psxM = psxMap(0x30000000, 0x00210000, 1, MAP_TAG_RAM);
 159         if (psxM == NULL)
 160                 psxM = psxMap(0x70000000, 0x00210000, 1, MAP_TAG_RAM);
 161
 162 #else
 163         psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
 164 #endif
 165 #ifndef RAM_FIXED
 166         if (psxM == NULL)
 167                 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
 168 #endif
 169         if (psxM == NULL) {
 170                 SysMessage(_("mapping main RAM failed"));
 171                 return -1;
 172         }
 173
 174         psxP = &psxM[0x200000];
 175 #ifdef LIGHTREC
 176         psxH = psxMap(0x4f800000, 0x10000, 0, MAP_TAG_OTHER);
 177         if (psxH == NULL)
 178                 psxH = psxMap(0x8f800000, 0x10000, 0, MAP_TAG_OTHER);
 179
 180         psxR = psxMap(0x4fc00000, 0x80000, 0, MAP_TAG_OTHER);
 181         if (psxR == NULL)
 182                 psxR = psxMap(0x8fc00000, 0x80000, 0, MAP_TAG_OTHER);
 183 #else
 184         psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
 185         psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
 186 #endif
 187
 188         if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
 189             psxR == NULL || psxP == NULL || psxH == NULL) {
 190                 SysMessage(_("Error allocating memory!"));
 191                 psxMemShutdown();
 192                 return -1;
 193         }
 194
 195 // MemR
 196         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 197
 198         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
 199         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
 200
 201         psxMemRLUT[0x1f00] = (u8 *)psxP;
 202         psxMemRLUT[0x1f80] = (u8 *)psxH;
 203
 204         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
 205
 206         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 207         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 208
 209 // MemW
 210         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 211
 212         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 213         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 214
 215         psxMemWLUT[0x1f00] = (u8 *)psxP;
 216         psxMemWLUT[0x1f80] = (u8 *)psxH;
 217
 218         return 0;
 219 }
 220
 221 void psxMemReset() {
 222         FILE *f = NULL;
 223         char bios[1024];
 224
 225         memset(psxM, 0, 0x00200000);
 226         memset(psxP, 0xff, 0x00010000);
 227
 228         Config.HLE = TRUE;
 229
 230         if (strcmp(Config.Bios, "HLE") != 0) {
 231                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 232                 f = fopen(bios, "rb");
 233
 234                 if (f == NULL) {
 235                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 236                         memset(psxR, 0, 0x80000);
 237                 } else {
 238                         if (fread(psxR, 1, 0x80000, f) == 0x80000) {
 239                                 Config.HLE = FALSE;
 240                         } else {
 241                                 SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios);
 242                         }
 243                         fclose(f);
 244                 }
 245         }
 246 }
 247
 248 void psxMemShutdown() {
 249         psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
 250         psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
 251         psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
 252
 253         free(psxMemRLUT); psxMemRLUT = NULL;
 254         free(psxMemWLUT); psxMemWLUT = NULL;
 255 }
 256
 257 static int writeok = 1;
 258
 259 u8 psxMemRead8(u32 mem) {
 260         char *p;
 261         u32 t;
 262
 263         t = mem >> 16;
 264         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 265                 if ((mem & 0xffff) < 0x400)
 266                         return psxHu8(mem);
 267                 else
 268                         return psxHwRead8(mem);
 269         } else {
 270                 p = (char *)(psxMemRLUT[t]);
 271                 if (p != NULL) {
 272                         if (Config.Debug)
 273                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 274                         return *(u8 *)(p + (mem & 0xffff));
 275                 } else {
 276 #ifdef PSXMEM_LOG
 277                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 278 #endif
 279                         return 0;
 280                 }
 281         }
 282 }
 283
 284 u16 psxMemRead16(u32 mem) {
 285         char *p;
 286         u32 t;
 287
 288         t = mem >> 16;
 289         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 290                 if ((mem & 0xffff) < 0x400)
 291                         return psxHu16(mem);
 292                 else
 293                         return psxHwRead16(mem);
 294         } else {
 295                 p = (char *)(psxMemRLUT[t]);
 296                 if (p != NULL) {
 297                         if (Config.Debug)
 298                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 299                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 300                 } else {
 301 #ifdef PSXMEM_LOG
 302                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 303 #endif
 304                         return 0;
 305                 }
 306         }
 307 }
 308
 309 u32 psxMemRead32(u32 mem) {
 310         char *p;
 311         u32 t;
 312
 313         t = mem >> 16;
 314         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 315                 if ((mem & 0xffff) < 0x400)
 316                         return psxHu32(mem);
 317                 else
 318                         return psxHwRead32(mem);
 319         } else {
 320                 p = (char *)(psxMemRLUT[t]);
 321                 if (p != NULL) {
 322                         if (Config.Debug)
 323                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 324                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 325                 } else {
 326 #ifdef PSXMEM_LOG
 327                         if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
 328 #endif
 329                         return 0;
 330                 }
 331         }
 332 }
 333
 334 void psxMemWrite8(u32 mem, u8 value) {
 335         char *p;
 336         u32 t;
 337
 338         t = mem >> 16;
 339         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 340                 if ((mem & 0xffff) < 0x400)
 341                         psxHu8(mem) = value;
 342                 else
 343                         psxHwWrite8(mem, value);
 344         } else {
 345                 p = (char *)(psxMemWLUT[t]);
 346                 if (p != NULL) {
 347                         if (Config.Debug)
 348                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 349                         *(u8 *)(p + (mem & 0xffff)) = value;
 350 #ifdef PSXREC
 351                         psxCpu->Clear((mem & (~3)), 1);
 352 #endif
 353                 } else {
 354 #ifdef PSXMEM_LOG
 355                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 356 #endif
 357                 }
 358         }
 359 }
 360
 361 void psxMemWrite16(u32 mem, u16 value) {
 362         char *p;
 363         u32 t;
 364
 365         t = mem >> 16;
 366         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 367                 if ((mem & 0xffff) < 0x400)
 368                         psxHu16ref(mem) = SWAPu16(value);
 369                 else
 370                         psxHwWrite16(mem, value);
 371         } else {
 372                 p = (char *)(psxMemWLUT[t]);
 373                 if (p != NULL) {
 374                         if (Config.Debug)
 375                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 376                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 377 #ifdef PSXREC
 378                         psxCpu->Clear((mem & (~3)), 1);
 379 #endif
 380                 } else {
 381 #ifdef PSXMEM_LOG
 382                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 383 #endif
 384                 }
 385         }
 386 }
 387
 388 void psxMemWrite32(u32 mem, u32 value) {
 389         char *p;
 390         u32 t;
 391
 392 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 393         t = mem >> 16;
 394         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 395                 if ((mem & 0xffff) < 0x400)
 396                         psxHu32ref(mem) = SWAPu32(value);
 397                 else
 398                         psxHwWrite32(mem, value);
 399         } else {
 400                 p = (char *)(psxMemWLUT[t]);
 401                 if (p != NULL) {
 402                         if (Config.Debug)
 403                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 404                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 405 #ifdef PSXREC
 406                         psxCpu->Clear(mem, 1);
 407 #endif
 408                 } else {
 409                         if (mem != 0xfffe0130) {
 410 #ifdef PSXREC
 411                                 if (!writeok)
 412                                         psxCpu->Clear(mem, 1);
 413 #endif
 414
 415 #ifdef PSXMEM_LOG
 416                                 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
 417 #endif
 418                         } else {
 419                                 int i;
 420
 421                                 switch (value) {
 422                                         case 0x800: case 0x804:
 423                                                 if (writeok == 0) break;
 424                                                 writeok = 0;
 425                                                 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
 426                                                 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
 427                                                 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
 428                                                 break;
 429                                         case 0x00: case 0x1e988:
 430                                                 if (writeok == 1) break;
 431                                                 writeok = 1;
 432                                                 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
 433                                                 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 434                                                 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 435                                                 break;
 436                                         default:
 437 #ifdef PSXMEM_LOG
 438                                                 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
 439 #endif
 440                                                 break;
 441                                 }
 442                         }
 443                 }
 444         }
 445 }
 446
 447 void *psxMemPointer(u32 mem) {
 448         char *p;
 449         u32 t;
 450
 451         t = mem >> 16;
 452         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 453                 if ((mem & 0xffff) < 0x400)
 454                         return (void *)&psxH[mem];
 455                 else
 456                         return NULL;
 457         } else {
 458                 p = (char *)(psxMemWLUT[t]);
 459                 if (p != NULL) {
 460                         return (void *)(p + (mem & 0xffff));
 461                 }
 462                 return NULL;
 463         }
 464 }