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 "lightrec/mem.h"
  33 #include "memmap.h"
  34
  35 #ifdef USE_LIBRETRO_VFS
  36 #include <streams/file_stream_transforms.h>
  37 #endif
  38
  39 #ifndef MAP_ANONYMOUS
  40 #define MAP_ANONYMOUS MAP_ANON
  41 #endif
  42
  43 boolean writeok = TRUE;
  44
  45 #if 0 //ndef NDEBUG
  46 #include "debug.h"
  47 #else
  48 void DebugCheckBP(u32 address, enum breakpoint_types type) {}
  49 #endif
  50
  51 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
  52                 enum psxMapTag tag);
  53 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
  54
  55 void *psxMap(unsigned long addr, size_t size, int is_fixed,
  56                 enum psxMapTag tag)
  57 {
  58         int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  59         int try_ = 0;
  60         unsigned long mask;
  61         void *req, *ret;
  62
  63 retry:
  64         if (psxMapHook != NULL) {
  65                 ret = psxMapHook(addr, size, 0, tag);
  66                 if (ret == NULL)
  67                         return MAP_FAILED;
  68         }
  69         else {
  70                 /* avoid MAP_FIXED, it overrides existing mappings.. */
  71                 /* if (is_fixed)
  72                         flags |= MAP_FIXED; */
  73
  74                 req = (void *)(uintptr_t)addr;
  75                 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
  76                 if (ret == MAP_FAILED)
  77                         return ret;
  78         }
  79
  80         if (addr != 0 && ret != (void *)(uintptr_t)addr) {
  81                 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
  82                         addr, ret);
  83
  84                 if (is_fixed) {
  85                         psxUnmap(ret, size, tag);
  86                         return MAP_FAILED;
  87                 }
  88
  89                 if (((addr ^ (unsigned long)(uintptr_t)ret) & ~0xff000000l) && try_ < 2)
  90                 {
  91                         psxUnmap(ret, size, tag);
  92
  93                         // try to use similarly aligned memory instead
  94                         // (recompiler needs this)
  95                         mask = try_ ? 0xffff : 0xffffff;
  96                         addr = ((uintptr_t)ret + mask) & ~mask;
  97                         try_++;
  98                         goto retry;
  99                 }
 100         }
 101
 102         return ret;
 103 }
 104
 105 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
 106 {
 107         if (psxUnmapHook != NULL) {
 108                 psxUnmapHook(ptr, size, tag);
 109                 return;
 110         }
 111
 112         if (ptr)
 113                 munmap(ptr, size);
 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                 return -1;
 151         }
 152
 153         psxP = &psxM[0x200000];
 154         psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
 155         psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
 156
 157         if (psxR == MAP_FAILED || psxH == MAP_FAILED) {
 158                 SysMessage(_("Error allocating memory!"));
 159                 psxMemShutdown();
 160                 return -1;
 161         }
 162
 163         return 0;
 164 }
 165
 166 static void psxMemFreeMap(void)
 167 {
 168         psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
 169         psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
 170         psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
 171 }
 172
 173 int psxMemInit(void)
 174 {
 175         unsigned int i;
 176         int ret;
 177
 178         if (LIGHTREC_CUSTOM_MAP)
 179                 ret = lightrec_init_mmap();
 180         else
 181                 ret = psxMemInitMap();
 182         if (ret) {
 183                 SysMessage(_("Error allocating memory!"));
 184                 psxMemShutdown();
 185                 return -1;
 186         }
 187
 188         psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 189         psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 190
 191         if (psxMemRLUT == NULL || psxMemWLUT == NULL) {
 192                 SysMessage(_("Error allocating memory!"));
 193                 psxMemShutdown();
 194                 return -1;
 195         }
 196
 197         memset(psxMemRLUT, 0xff, 0x10000 * sizeof(void *));
 198         memset(psxMemWLUT, 0xff, 0x10000 * sizeof(void *));
 199
 200 // MemR
 201         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 202
 203         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
 204         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
 205
 206         psxMemRLUT[0x1f00] = (u8 *)psxP;
 207         psxMemRLUT[0x1f80] = (u8 *)psxH;
 208
 209         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
 210
 211         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 212         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 213
 214 // MemW
 215         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 216
 217         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 218         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 219
 220         // Don't allow writes to PIO Expansion region (psxP) to take effect.
 221         // NOTE: Not sure if this is needed to fix any games but seems wise,
 222         //       seeing as some games do read from PIO as part of copy-protection
 223         //       check. (See fix in psxMemReset() regarding psxP region reads).
 224         psxMemWLUT[0x1f00] = INVALID_PTR;
 225         psxMemWLUT[0x1f80] = (u8 *)psxH;
 226
 227         return 0;
 228 }
 229
 230 void psxMemReset() {
 231         FILE *f = NULL;
 232         char bios[1024];
 233
 234         memset(psxM, 0, 0x00200000);
 235         memset(psxP, 0xff, 0x00010000);
 236
 237         Config.HLE = TRUE;
 238
 239         if (strcmp(Config.Bios, "HLE") != 0) {
 240                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 241                 f = fopen(bios, "rb");
 242
 243                 if (f == NULL) {
 244                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 245                         memset(psxR, 0, 0x80000);
 246                 } else {
 247                         if (fread(psxR, 1, 0x80000, f) == 0x80000) {
 248                                 Config.HLE = FALSE;
 249                         } else {
 250                                 SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios);
 251                         }
 252                         fclose(f);
 253                 }
 254         }
 255 }
 256
 257 void psxMemShutdown() {
 258         if (LIGHTREC_CUSTOM_MAP)
 259                 lightrec_free_mmap();
 260         else
 261                 psxMemFreeMap();
 262
 263         free(psxMemRLUT); psxMemRLUT = NULL;
 264         free(psxMemWLUT); psxMemWLUT = NULL;
 265 }
 266
 267 u8 psxMemRead8(u32 mem) {
 268         char *p;
 269         u32 t;
 270
 271         t = mem >> 16;
 272         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 273                 if ((mem & 0xffff) < 0x400)
 274                         return psxHu8(mem);
 275                 else
 276                         return psxHwRead8(mem);
 277         } else {
 278                 p = (char *)(psxMemRLUT[t]);
 279                 if (p != INVALID_PTR) {
 280                         if (Config.Debug)
 281                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 282                         return *(u8 *)(p + (mem & 0xffff));
 283                 } else {
 284 #ifdef PSXMEM_LOG
 285                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 286 #endif
 287                         return 0xFF;
 288                 }
 289         }
 290 }
 291
 292 u16 psxMemRead16(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 psxHu16(mem);
 300                 else
 301                         return psxHwRead16(mem);
 302         } else {
 303                 p = (char *)(psxMemRLUT[t]);
 304                 if (p != INVALID_PTR) {
 305                         if (Config.Debug)
 306                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 307                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 308                 } else {
 309 #ifdef PSXMEM_LOG
 310                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 311 #endif
 312                         return 0xFFFF;
 313                 }
 314         }
 315 }
 316
 317 u32 psxMemRead32(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 psxHu32(mem);
 325                 else
 326                         return psxHwRead32(mem);
 327         } else {
 328                 p = (char *)(psxMemRLUT[t]);
 329                 if (p != INVALID_PTR) {
 330                         if (Config.Debug)
 331                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 332                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 333                 } else {
 334 #ifdef PSXMEM_LOG
 335                         if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
 336 #endif
 337                         return 0xFFFFFFFF;
 338                 }
 339         }
 340 }
 341
 342 void psxMemWrite8(u32 mem, u8 value) {
 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                         psxHu8(mem) = value;
 350                 else
 351                         psxHwWrite8(mem, value);
 352         } else {
 353                 p = (char *)(psxMemWLUT[t]);
 354                 if (p != INVALID_PTR) {
 355                         if (Config.Debug)
 356                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 357                         *(u8 *)(p + (mem & 0xffff)) = value;
 358 #ifndef DRC_DISABLE
 359                         psxCpu->Clear((mem & (~3)), 1);
 360 #endif
 361                 } else {
 362 #ifdef PSXMEM_LOG
 363                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 364 #endif
 365                 }
 366         }
 367 }
 368
 369 void psxMemWrite16(u32 mem, u16 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                         psxHu16ref(mem) = SWAPu16(value);
 377                 else
 378                         psxHwWrite16(mem, value);
 379         } else {
 380                 p = (char *)(psxMemWLUT[t]);
 381                 if (p != INVALID_PTR) {
 382                         if (Config.Debug)
 383                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 384                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 385 #ifndef DRC_DISABLE
 386                         psxCpu->Clear((mem & (~3)), 1);
 387 #endif
 388                 } else {
 389 #ifdef PSXMEM_LOG
 390                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 391 #endif
 392                 }
 393         }
 394 }
 395
 396 void psxMemWrite32(u32 mem, u32 value) {
 397         char *p;
 398         u32 t;
 399
 400 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 401         t = mem >> 16;
 402         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 403                 if ((mem & 0xffff) < 0x400)
 404                         psxHu32ref(mem) = SWAPu32(value);
 405                 else
 406                         psxHwWrite32(mem, value);
 407         } else {
 408                 p = (char *)(psxMemWLUT[t]);
 409                 if (p != INVALID_PTR) {
 410                         if (Config.Debug)
 411                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 412                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 413 #ifndef DRC_DISABLE
 414                         psxCpu->Clear(mem, 1);
 415 #endif
 416                 } else {
 417                         if (mem != 0xfffe0130) {
 418 #ifndef DRC_DISABLE
 419                                 if (!writeok)
 420                                         psxCpu->Clear(mem, 1);
 421 #endif
 422
 423 #ifdef PSXMEM_LOG
 424                                 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
 425 #endif
 426                         } else {
 427                                 int i;
 428
 429                                 switch (value) {
 430                                         case 0x800: case 0x804:
 431                                                 if (writeok == 0) break;
 432                                                 writeok = 0;
 433                                                 memset(psxMemWLUT + 0x0000, 0xff, 0x80 * sizeof(void *));
 434                                                 memset(psxMemWLUT + 0x8000, 0xff, 0x80 * sizeof(void *));
 435                                                 memset(psxMemWLUT + 0xa000, 0xff, 0x80 * sizeof(void *));
 436                                                 /* Required for icache interpreter otherwise Armored Core won't boot on icache interpreter */
 437                                                 psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_ISOLATED, NULL);
 438                                                 break;
 439                                         case 0x00: case 0x1e988:
 440                                                 if (writeok == 1) break;
 441                                                 writeok = 1;
 442                                                 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
 443                                                 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 444                                                 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 445                                                 /* Dynarecs might take this opportunity to flush their code cache */
 446                                                 psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL);
 447                                                 break;
 448                                         default:
 449 #ifdef PSXMEM_LOG
 450                                                 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
 451 #endif
 452                                                 break;
 453                                 }
 454                         }
 455                 }
 456         }
 457 }
 458
 459 void *psxMemPointer(u32 mem) {
 460         char *p;
 461         u32 t;
 462
 463         t = mem >> 16;
 464         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 465                 if ((mem & 0xffff) < 0x400)
 466                         return (void *)&psxH[mem];
 467                 else
 468                         return NULL;
 469         } else {
 470                 p = (char *)(psxMemWLUT[t]);
 471                 if (p != INVALID_PTR) {
 472                         return (void *)(p + (mem & 0xffff));
 473                 }
 474                 return NULL;
 475         }
 476 }