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 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
  45                 enum psxMapTag tag);
  46 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
  47
  48 void *psxMap(unsigned long addr, size_t size, int is_fixed,
  49                 enum psxMapTag tag)
  50 {
  51         int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  52         int try_ = 0;
  53         unsigned long mask;
  54         void *req, *ret;
  55
  56 retry:
  57         if (psxMapHook != NULL) {
  58                 ret = psxMapHook(addr, size, 0, tag);
  59                 if (ret == NULL)
  60                         return MAP_FAILED;
  61         }
  62         else {
  63                 /* avoid MAP_FIXED, it overrides existing mappings.. */
  64                 /* if (is_fixed)
  65                         flags |= MAP_FIXED; */
  66
  67                 req = (void *)(uintptr_t)addr;
  68                 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
  69                 if (ret == MAP_FAILED)
  70                         return ret;
  71         }
  72
  73         if (addr != 0 && ret != (void *)(uintptr_t)addr) {
  74                 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
  75                         addr, ret);
  76
  77                 if (is_fixed) {
  78                         psxUnmap(ret, size, tag);
  79                         return MAP_FAILED;
  80                 }
  81
  82                 if (((addr ^ (unsigned long)(uintptr_t)ret) & ~0xff000000l) && try_ < 2)
  83                 {
  84                         psxUnmap(ret, size, tag);
  85
  86                         // try to use similarly aligned memory instead
  87                         // (recompiler needs this)
  88                         mask = try_ ? 0xffff : 0xffffff;
  89                         addr = ((uintptr_t)ret + mask) & ~mask;
  90                         try_++;
  91                         goto retry;
  92                 }
  93         }
  94
  95         return ret;
  96 }
  97
  98 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
  99 {
 100         if (psxUnmapHook != NULL) {
 101                 psxUnmapHook(ptr, size, tag);
 102                 return;
 103         }
 104
 105         if (ptr)
 106                 munmap(ptr, size);
 107 }
 108
 109 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
 110 s8 *psxP = NULL; // Parallel Port (64K)
 111 s8 *psxR = NULL; // BIOS ROM (512K)
 112 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
 113
 114 u8 **psxMemWLUT = NULL;
 115 u8 **psxMemRLUT = NULL;
 116
 117 /*  Playstation Memory Map (from Playstation doc by Joshua Walker)
 118 0x0000_0000-0x0000_ffff         Kernel (64K)
 119 0x0001_0000-0x001f_ffff         User Memory (1.9 Meg)
 120
 121 0x1f00_0000-0x1f00_ffff         Parallel Port (64K)
 122
 123 0x1f80_0000-0x1f80_03ff         Scratch Pad (1024 bytes)
 124
 125 0x1f80_1000-0x1f80_2fff         Hardware Registers (8K)
 126
 127 0x1fc0_0000-0x1fc7_ffff         BIOS (512K)
 128
 129 0x8000_0000-0x801f_ffff         Kernel and User Memory Mirror (2 Meg) Cached
 130 0x9fc0_0000-0x9fc7_ffff         BIOS Mirror (512K) Cached
 131
 132 0xa000_0000-0xa01f_ffff         Kernel and User Memory Mirror (2 Meg) Uncached
 133 0xbfc0_0000-0xbfc7_ffff         BIOS Mirror (512K) Uncached
 134 */
 135
 136 static int psxMemInitMap(void)
 137 {
 138         psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
 139         if (psxM == MAP_FAILED)
 140                 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
 141         if (psxM == MAP_FAILED) {
 142                 SysMessage(_("mapping main RAM failed"));
 143                 psxM = NULL;
 144                 return -1;
 145         }
 146         psxP = &psxM[0x200000];
 147
 148         psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
 149         if (psxH == MAP_FAILED) {
 150                 SysMessage(_("Error allocating memory!"));
 151                 psxMemShutdown();
 152                 return -1;
 153         }
 154
 155         psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
 156         if (psxR == MAP_FAILED) {
 157                 SysMessage(_("Error allocating memory!"));
 158                 psxMemShutdown();
 159                 return -1;
 160         }
 161
 162         return 0;
 163 }
 164
 165 static void psxMemFreeMap(void)
 166 {
 167         if (psxM) psxUnmap(psxM, 0x00210000, MAP_TAG_RAM);
 168         if (psxH) psxUnmap(psxH, 0x10000, MAP_TAG_OTHER);
 169         if (psxR) psxUnmap(psxR, 0x80000, MAP_TAG_OTHER);
 170         psxM = psxH = psxR = NULL;
 171         psxP = NULL;
 172 }
 173
 174 int psxMemInit(void)
 175 {
 176         unsigned int i;
 177         int ret;
 178
 179         if (LIGHTREC_CUSTOM_MAP)
 180                 ret = lightrec_init_mmap();
 181         else
 182                 ret = psxMemInitMap();
 183         if (ret) {
 184                 SysMessage(_("Error allocating memory!"));
 185                 psxMemShutdown();
 186                 return -1;
 187         }
 188
 189         psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 190         psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 191
 192         if (psxMemRLUT == NULL || psxMemWLUT == NULL) {
 193                 SysMessage(_("Error allocating memory!"));
 194                 psxMemShutdown();
 195                 return -1;
 196         }
 197
 198         memset(psxMemRLUT, (uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
 199         memset(psxMemWLUT, (uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
 200
 201 // MemR
 202         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 203
 204         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
 205         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
 206
 207         psxMemRLUT[0x1f00] = (u8 *)psxP;
 208         psxMemRLUT[0x1f80] = (u8 *)psxH;
 209
 210         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
 211
 212         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 213         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 214
 215 // MemW
 216         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 217
 218         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 219         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 220
 221         // Don't allow writes to PIO Expansion region (psxP) to take effect.
 222         // NOTE: Not sure if this is needed to fix any games but seems wise,
 223         //       seeing as some games do read from PIO as part of copy-protection
 224         //       check. (See fix in psxMemReset() regarding psxP region reads).
 225         psxMemWLUT[0x1f00] = INVALID_PTR;
 226         psxMemWLUT[0x1f80] = (u8 *)psxH;
 227
 228         return 0;
 229 }
 230
 231 void psxMemReset() {
 232         FILE *f = NULL;
 233         char bios[1024];
 234
 235         memset(psxM, 0, 0x00200000);
 236         memset(psxP, 0xff, 0x00010000);
 237
 238         Config.HLE = TRUE;
 239
 240         if (strcmp(Config.Bios, "HLE") != 0) {
 241                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 242                 f = fopen(bios, "rb");
 243
 244                 if (f == NULL) {
 245                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 246                         memset(psxR, 0, 0x80000);
 247                 } else {
 248                         if (fread(psxR, 1, 0x80000, f) == 0x80000) {
 249                                 Config.HLE = FALSE;
 250                         } else {
 251                                 SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios);
 252                         }
 253                         fclose(f);
 254                 }
 255         }
 256 }
 257
 258 void psxMemShutdown() {
 259         if (LIGHTREC_CUSTOM_MAP)
 260                 lightrec_free_mmap();
 261         else
 262                 psxMemFreeMap();
 263
 264         free(psxMemRLUT); psxMemRLUT = NULL;
 265         free(psxMemWLUT); psxMemWLUT = NULL;
 266 }
 267
 268 static int writeok = 1;
 269
 270 u8 psxMemRead8(u32 mem) {
 271         char *p;
 272         u32 t;
 273
 274         t = mem >> 16;
 275         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 276                 if ((mem & 0xffff) < 0x400)
 277                         return psxHu8(mem);
 278                 else
 279                         return psxHwRead8(mem);
 280         } else {
 281                 p = (char *)(psxMemRLUT[t]);
 282                 if (p != INVALID_PTR) {
 283                         if (Config.Debug)
 284                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 285                         return *(u8 *)(p + (mem & 0xffff));
 286                 } else {
 287 #ifdef PSXMEM_LOG
 288                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 289 #endif
 290                         return 0xFF;
 291                 }
 292         }
 293 }
 294
 295 u16 psxMemRead16(u32 mem) {
 296         char *p;
 297         u32 t;
 298
 299         t = mem >> 16;
 300         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 301                 if ((mem & 0xffff) < 0x400)
 302                         return psxHu16(mem);
 303                 else
 304                         return psxHwRead16(mem);
 305         } else {
 306                 p = (char *)(psxMemRLUT[t]);
 307                 if (p != INVALID_PTR) {
 308                         if (Config.Debug)
 309                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 310                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 311                 } else {
 312 #ifdef PSXMEM_LOG
 313                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 314 #endif
 315                         return 0xFFFF;
 316                 }
 317         }
 318 }
 319
 320 u32 psxMemRead32(u32 mem) {
 321         char *p;
 322         u32 t;
 323
 324         t = mem >> 16;
 325         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 326                 if ((mem & 0xffff) < 0x400)
 327                         return psxHu32(mem);
 328                 else
 329                         return psxHwRead32(mem);
 330         } else {
 331                 p = (char *)(psxMemRLUT[t]);
 332                 if (p != INVALID_PTR) {
 333                         if (Config.Debug)
 334                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 335                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 336                 } else {
 337 #ifdef PSXMEM_LOG
 338                         if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
 339 #endif
 340                         return 0xFFFFFFFF;
 341                 }
 342         }
 343 }
 344
 345 void psxMemWrite8(u32 mem, u8 value) {
 346         char *p;
 347         u32 t;
 348
 349         t = mem >> 16;
 350         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 351                 if ((mem & 0xffff) < 0x400)
 352                         psxHu8(mem) = value;
 353                 else
 354                         psxHwWrite8(mem, value);
 355         } else {
 356                 p = (char *)(psxMemWLUT[t]);
 357                 if (p != INVALID_PTR) {
 358                         if (Config.Debug)
 359                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 360                         *(u8 *)(p + (mem & 0xffff)) = value;
 361 #ifndef DRC_DISABLE
 362                         psxCpu->Clear((mem & (~3)), 1);
 363 #endif
 364                 } else {
 365 #ifdef PSXMEM_LOG
 366                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 367 #endif
 368                 }
 369         }
 370 }
 371
 372 void psxMemWrite16(u32 mem, u16 value) {
 373         char *p;
 374         u32 t;
 375
 376         t = mem >> 16;
 377         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 378                 if ((mem & 0xffff) < 0x400)
 379                         psxHu16ref(mem) = SWAPu16(value);
 380                 else
 381                         psxHwWrite16(mem, value);
 382         } else {
 383                 p = (char *)(psxMemWLUT[t]);
 384                 if (p != INVALID_PTR) {
 385                         if (Config.Debug)
 386                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 387                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 388 #ifndef DRC_DISABLE
 389                         psxCpu->Clear((mem & (~3)), 1);
 390 #endif
 391                 } else {
 392 #ifdef PSXMEM_LOG
 393                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 394 #endif
 395                 }
 396         }
 397 }
 398
 399 void psxMemWrite32(u32 mem, u32 value) {
 400         char *p;
 401         u32 t;
 402
 403 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 404         t = mem >> 16;
 405         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 406                 if ((mem & 0xffff) < 0x400)
 407                         psxHu32ref(mem) = SWAPu32(value);
 408                 else
 409                         psxHwWrite32(mem, value);
 410         } else {
 411                 p = (char *)(psxMemWLUT[t]);
 412                 if (p != INVALID_PTR) {
 413                         if (Config.Debug)
 414                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 415                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 416 #ifndef DRC_DISABLE
 417                         psxCpu->Clear(mem, 1);
 418 #endif
 419                 } else {
 420                         if (mem != 0xfffe0130) {
 421 #ifndef DRC_DISABLE
 422                                 if (!writeok)
 423                                         psxCpu->Clear(mem, 1);
 424 #endif
 425
 426 #ifdef PSXMEM_LOG
 427                                 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
 428 #endif
 429                         } else {
 430                                 int i;
 431
 432                                 switch (value) {
 433                                         case 0x800: case 0x804:
 434                                                 if (writeok == 0) break;
 435                                                 writeok = 0;
 436                                                 memset(psxMemWLUT + 0x0000, (uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
 437                                                 memset(psxMemWLUT + 0x8000, (uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
 438                                                 memset(psxMemWLUT + 0xa000, (uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
 439                                                 /* Required for icache interpreter otherwise Armored Core won't boot on icache interpreter */
 440                                                 psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_ISOLATED, NULL);
 441                                                 break;
 442                                         case 0x00: case 0x1e988:
 443                                                 if (writeok == 1) break;
 444                                                 writeok = 1;
 445                                                 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
 446                                                 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 447                                                 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 448                                                 /* Dynarecs might take this opportunity to flush their code cache */
 449                                                 psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL);
 450                                                 break;
 451                                         default:
 452 #ifdef PSXMEM_LOG
 453                                                 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
 454 #endif
 455                                                 break;
 456                                 }
 457                         }
 458                 }
 459         }
 460 }
 461
 462 void *psxMemPointer(u32 mem) {
 463         char *p;
 464         u32 t;
 465
 466         t = mem >> 16;
 467         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 468                 if ((mem & 0xffff) < 0x400)
 469                         return (void *)&psxH[mem];
 470                 else
 471                         return NULL;
 472         } else {
 473                 p = (char *)(psxMemWLUT[t]);
 474                 if (p != INVALID_PTR) {
 475                         return (void *)(p + (mem & 0xffff));
 476                 }
 477                 return NULL;
 478         }
 479 }