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