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 #define DebugCheckBP(...)
  32
  33 #include "lightrec/mem.h"
  34 #include "memmap.h"
  35
  36 #ifdef USE_LIBRETRO_VFS
  37 #include <streams/file_stream_transforms.h>
  38 #endif
  39
  40 #ifndef MAP_ANONYMOUS
  41 #define MAP_ANONYMOUS MAP_ANON
  42 #endif
  43
  44 static void * psxMapDefault(unsigned long addr, size_t size,
  45                             int is_fixed, enum psxMapTag tag)
  46 {
  47 #if !HAVE_MMAP
  48         void *ptr;
  49
  50         ptr = malloc(size);
  51         return ptr ? ptr : MAP_FAILED;
  52 #else
  53         int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  54
  55         return mmap((void *)(uintptr_t)addr, size,
  56                     PROT_READ | PROT_WRITE, flags, -1, 0);
  57 #endif
  58 }
  59
  60 static void psxUnmapDefault(void *ptr, size_t size, enum psxMapTag tag)
  61 {
  62 #if !HAVE_MMAP
  63         free(ptr);
  64 #else
  65         munmap(ptr, size);
  66 #endif
  67 }
  68
  69 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
  70                 enum psxMapTag tag) = psxMapDefault;
  71 void (*psxUnmapHook)(void *ptr, size_t size,
  72                      enum psxMapTag tag) = psxUnmapDefault;
  73
  74 void *psxMap(unsigned long addr, size_t size, int is_fixed,
  75                 enum psxMapTag tag)
  76 {
  77         int try_ = 0;
  78         unsigned long mask;
  79         void *ret;
  80
  81 retry:
  82         ret = psxMapHook(addr, size, 0, tag);
  83         if (ret == NULL)
  84                 return MAP_FAILED;
  85
  86         if (addr != 0 && ret != (void *)(uintptr_t)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 MAP_FAILED;
  93                 }
  94
  95                 if (((addr ^ (unsigned long)(uintptr_t)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 = ((uintptr_t)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         psxUnmapHook(ptr, size, tag);
 114 }
 115
 116 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
 117 s8 *psxP = NULL; // Parallel Port (64K)
 118 s8 *psxR = NULL; // BIOS ROM (512K)
 119 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
 120
 121 u8 **psxMemWLUT = NULL;
 122 u8 **psxMemRLUT = NULL;
 123
 124 /*  Playstation Memory Map (from Playstation doc by Joshua Walker)
 125 0x0000_0000-0x0000_ffff         Kernel (64K)
 126 0x0001_0000-0x001f_ffff         User Memory (1.9 Meg)
 127
 128 0x1f00_0000-0x1f00_ffff         Parallel Port (64K)
 129
 130 0x1f80_0000-0x1f80_03ff         Scratch Pad (1024 bytes)
 131
 132 0x1f80_1000-0x1f80_2fff         Hardware Registers (8K)
 133
 134 0x1fc0_0000-0x1fc7_ffff         BIOS (512K)
 135
 136 0x8000_0000-0x801f_ffff         Kernel and User Memory Mirror (2 Meg) Cached
 137 0x9fc0_0000-0x9fc7_ffff         BIOS Mirror (512K) Cached
 138
 139 0xa000_0000-0xa01f_ffff         Kernel and User Memory Mirror (2 Meg) Uncached
 140 0xbfc0_0000-0xbfc7_ffff         BIOS Mirror (512K) Uncached
 141 */
 142
 143 static int psxMemInitMap(void)
 144 {
 145         psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
 146         if (psxM == MAP_FAILED)
 147                 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
 148         if (psxM == MAP_FAILED) {
 149                 SysMessage(_("mapping main RAM failed"));
 150                 psxM = NULL;
 151                 return -1;
 152         }
 153         psxP = &psxM[0x200000];
 154
 155         psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
 156         if (psxH == MAP_FAILED) {
 157                 SysMessage(_("Error allocating memory!"));
 158                 psxMemShutdown();
 159                 return -1;
 160         }
 161
 162         psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
 163         if (psxR == MAP_FAILED) {
 164                 SysMessage(_("Error allocating memory!"));
 165                 psxMemShutdown();
 166                 return -1;
 167         }
 168
 169         return 0;
 170 }
 171
 172 static void psxMemFreeMap(void)
 173 {
 174         if (psxM) psxUnmap(psxM, 0x00210000, MAP_TAG_RAM);
 175         if (psxH) psxUnmap(psxH, 0x10000, MAP_TAG_OTHER);
 176         if (psxR) psxUnmap(psxR, 0x80000, MAP_TAG_OTHER);
 177         psxM = psxH = psxR = NULL;
 178         psxP = NULL;
 179 }
 180
 181 int psxMemInit(void)
 182 {
 183         unsigned int i;
 184         int ret;
 185
 186         if (LIGHTREC_CUSTOM_MAP)
 187                 ret = lightrec_init_mmap();
 188         else
 189                 ret = psxMemInitMap();
 190         if (ret) {
 191                 SysMessage(_("Error allocating memory!"));
 192                 psxMemShutdown();
 193                 return -1;
 194         }
 195
 196         psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 197         psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 198
 199         if (psxMemRLUT == NULL || psxMemWLUT == NULL) {
 200                 SysMessage(_("Error allocating memory!"));
 201                 psxMemShutdown();
 202                 return -1;
 203         }
 204
 205         memset(psxMemRLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
 206         memset(psxMemWLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
 207
 208 // MemR
 209         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 210
 211         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
 212         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
 213
 214         psxMemRLUT[0x1f00] = (u8 *)psxP;
 215         psxMemRLUT[0x1f80] = (u8 *)psxH;
 216
 217         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
 218
 219         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 220         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 221
 222 // MemW
 223         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 224
 225         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 226         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 227
 228         // Don't allow writes to PIO Expansion region (psxP) to take effect.
 229         // NOTE: Not sure if this is needed to fix any games but seems wise,
 230         //       seeing as some games do read from PIO as part of copy-protection
 231         //       check. (See fix in psxMemReset() regarding psxP region reads).
 232         psxMemWLUT[0x1f00] = INVALID_PTR;
 233         psxMemWLUT[0x1f80] = (u8 *)psxH;
 234
 235         return 0;
 236 }
 237
 238 void psxMemReset() {
 239         FILE *f = NULL;
 240         char bios[1024];
 241
 242         memset(psxM, 0, 0x00200000);
 243         memset(psxP, 0xff, 0x00010000);
 244
 245         Config.HLE = TRUE;
 246
 247         if (strcmp(Config.Bios, "HLE") != 0) {
 248                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 249                 f = fopen(bios, "rb");
 250
 251                 if (f == NULL) {
 252                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 253                         memset(psxR, 0, 0x80000);
 254                 } else {
 255                         if (fread(psxR, 1, 0x80000, f) == 0x80000) {
 256                                 Config.HLE = FALSE;
 257                         } else {
 258                                 SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios);
 259                         }
 260                         fclose(f);
 261                 }
 262         }
 263 }
 264
 265 void psxMemShutdown() {
 266         if (LIGHTREC_CUSTOM_MAP)
 267                 lightrec_free_mmap();
 268         else
 269                 psxMemFreeMap();
 270
 271         free(psxMemRLUT); psxMemRLUT = NULL;
 272         free(psxMemWLUT); psxMemWLUT = NULL;
 273 }
 274
 275 void psxMemOnIsolate(int enable)
 276 {
 277         if (enable) {
 278                 memset(psxMemWLUT + 0x0000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
 279                 memset(psxMemWLUT + 0x8000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
 280                 //memset(psxMemWLUT + 0xa000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
 281         } else {
 282                 int i;
 283                 for (i = 0; i < 0x80; i++)
 284                         psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
 285                 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 286                 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 287         }
 288         psxCpu->Notify(enable ? R3000ACPU_NOTIFY_CACHE_ISOLATED
 289                         : R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL);
 290 }
 291
 292 u8 psxMemRead8(u32 mem) {
 293         char *p;
 294         u32 t;
 295
 296         t = mem >> 16;
 297         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 298                 if ((mem & 0xffff) < 0x400)
 299                         return psxHu8(mem);
 300                 else
 301                         return psxHwRead8(mem);
 302         } else {
 303                 p = (char *)(psxMemRLUT[t]);
 304                 if (p != INVALID_PTR) {
 305                         if (Config.Debug)
 306                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 307                         return *(u8 *)(p + (mem & 0xffff));
 308                 } else {
 309 #ifdef PSXMEM_LOG
 310                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 311 #endif
 312                         return 0xFF;
 313                 }
 314         }
 315 }
 316
 317 u16 psxMemRead16(u32 mem) {
 318         char *p;
 319         u32 t;
 320
 321         t = mem >> 16;
 322         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 323                 if ((mem & 0xffff) < 0x400)
 324                         return psxHu16(mem);
 325                 else
 326                         return psxHwRead16(mem);
 327         } else {
 328                 p = (char *)(psxMemRLUT[t]);
 329                 if (p != INVALID_PTR) {
 330                         if (Config.Debug)
 331                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 332                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 333                 } else {
 334 #ifdef PSXMEM_LOG
 335                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 336 #endif
 337                         return 0xFFFF;
 338                 }
 339         }
 340 }
 341
 342 u32 psxMemRead32(u32 mem) {
 343         char *p;
 344         u32 t;
 345
 346         t = mem >> 16;
 347         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 348                 if ((mem & 0xffff) < 0x400)
 349                         return psxHu32(mem);
 350                 else
 351                         return psxHwRead32(mem);
 352         } else {
 353                 p = (char *)(psxMemRLUT[t]);
 354                 if (p != INVALID_PTR) {
 355                         if (Config.Debug)
 356                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 357                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 358                 } else {
 359                         if (mem == 0xfffe0130)
 360                                 return psxRegs.biuReg;
 361 #ifdef PSXMEM_LOG
 362                         PSXMEM_LOG("err lw %8.8lx\n", mem);
 363 #endif
 364                         return 0xFFFFFFFF;
 365                 }
 366         }
 367 }
 368
 369 void psxMemWrite8(u32 mem, u8 value) {
 370         char *p;
 371         u32 t;
 372
 373         t = mem >> 16;
 374         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 375                 if ((mem & 0xffff) < 0x400)
 376                         psxHu8(mem) = value;
 377                 else
 378                         psxHwWrite8(mem, value);
 379         } else {
 380                 p = (char *)(psxMemWLUT[t]);
 381                 if (p != INVALID_PTR) {
 382                         if (Config.Debug)
 383                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 384                         *(u8 *)(p + (mem & 0xffff)) = value;
 385 #ifndef DRC_DISABLE
 386                         psxCpu->Clear((mem & (~3)), 1);
 387 #endif
 388                 } else {
 389 #ifdef PSXMEM_LOG
 390                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 391 #endif
 392                 }
 393         }
 394 }
 395
 396 void psxMemWrite16(u32 mem, u16 value) {
 397         char *p;
 398         u32 t;
 399
 400         t = mem >> 16;
 401         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 402                 if ((mem & 0xffff) < 0x400)
 403                         psxHu16ref(mem) = SWAPu16(value);
 404                 else
 405                         psxHwWrite16(mem, value);
 406         } else {
 407                 p = (char *)(psxMemWLUT[t]);
 408                 if (p != INVALID_PTR) {
 409                         if (Config.Debug)
 410                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 411                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 412 #ifndef DRC_DISABLE
 413                         psxCpu->Clear((mem & (~3)), 1);
 414 #endif
 415                 } else {
 416 #ifdef PSXMEM_LOG
 417                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 418 #endif
 419                 }
 420         }
 421 }
 422
 423 void psxMemWrite32(u32 mem, u32 value) {
 424         char *p;
 425         u32 t;
 426
 427 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 428         t = mem >> 16;
 429         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 430                 if ((mem & 0xffff) < 0x400)
 431                         psxHu32ref(mem) = SWAPu32(value);
 432                 else
 433                         psxHwWrite32(mem, value);
 434         } else {
 435                 p = (char *)(psxMemWLUT[t]);
 436                 if (p != INVALID_PTR) {
 437                         if (Config.Debug)
 438                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 439                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 440 #ifndef DRC_DISABLE
 441                         psxCpu->Clear(mem, 1);
 442 #endif
 443                 } else {
 444                         if (mem == 0xfffe0130) {
 445                                 psxRegs.biuReg = value;
 446                                 return;
 447                         }
 448 #ifdef PSXMEM_LOG
 449                         PSXMEM_LOG("err sw %8.8lx\n", mem);
 450 #endif
 451                 }
 452         }
 453 }
 454
 455 void *psxMemPointer(u32 mem) {
 456         char *p;
 457         u32 t;
 458
 459         t = mem >> 16;
 460         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 461                 if ((mem & 0xffff) < 0x400)
 462                         return (void *)&psxH[mem];
 463                 else
 464                         return NULL;
 465         } else {
 466                 p = (char *)(psxMemWLUT[t]);
 467                 if (p != INVALID_PTR) {
 468                         return (void *)(p + (mem & 0xffff));
 469                 }
 470                 return NULL;
 471         }
 472 }