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