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 "r3000a.h"
  28 #include "psxhw.h"
  29 #include "debug.h"
  30 #include <sys/mman.h>
  31
  32 #ifndef MAP_ANONYMOUS
  33 #define MAP_ANONYMOUS MAP_ANON
  34 #endif
  35
  36 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
  37 s8 *psxP = NULL; // Parallel Port (64K)
  38 s8 *psxR = NULL; // BIOS ROM (512K)
  39 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
  40
  41 u8 **psxMemWLUT = NULL;
  42 u8 **psxMemRLUT = NULL;
  43
  44 /*  Playstation Memory Map (from Playstation doc by Joshua Walker)
  45 0x0000_0000-0x0000_ffff         Kernel (64K)
  46 0x0001_0000-0x001f_ffff         User Memory (1.9 Meg)
  47
  48 0x1f00_0000-0x1f00_ffff         Parallel Port (64K)
  49
  50 0x1f80_0000-0x1f80_03ff         Scratch Pad (1024 bytes)
  51
  52 0x1f80_1000-0x1f80_2fff         Hardware Registers (8K)
  53
  54 0x1fc0_0000-0x1fc7_ffff         BIOS (512K)
  55
  56 0x8000_0000-0x801f_ffff         Kernel and User Memory Mirror (2 Meg) Cached
  57 0x9fc0_0000-0x9fc7_ffff         BIOS Mirror (512K) Cached
  58
  59 0xa000_0000-0xa01f_ffff         Kernel and User Memory Mirror (2 Meg) Uncached
  60 0xbfc0_0000-0xbfc7_ffff         BIOS Mirror (512K) Uncached
  61 */
  62
  63 int psxMemInit() {
  64         int i;
  65
  66         psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
  67         psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
  68         memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
  69         memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
  70
  71         psxM = mmap((void *)0x80000000, 0x00210000,
  72                 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
  73 #ifndef RAM_FIXED
  74         if (psxM == MAP_FAILED)
  75                 psxM = mmap((void *)0x70000000, 0x00210000,
  76                         PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
  77 #endif
  78         if (psxM == MAP_FAILED) {
  79                 SysMessage(_("mapping main RAM failed"));
  80                 return -1;
  81         }
  82
  83         psxP = &psxM[0x200000];
  84         psxH = mmap((void *)0x1f800000, 0x00010000,
  85                 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
  86
  87         psxR = mmap((void *)0x1fc00000, 0x80000,
  88                 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  89
  90         if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
  91                 psxR == MAP_FAILED ||
  92                 psxP == NULL || psxH != (void *)0x1f800000) {
  93                 SysMessage(_("Error allocating memory!"));
  94                 return -1;
  95         }
  96
  97 // MemR
  98         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
  99
 100         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
 101         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
 102
 103         psxMemRLUT[0x1f00] = (u8 *)psxP;
 104         psxMemRLUT[0x1f80] = (u8 *)psxH;
 105
 106         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
 107
 108         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 109         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 110
 111 // MemW
 112         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 113
 114         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 115         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 116
 117         psxMemWLUT[0x1f00] = (u8 *)psxP;
 118         psxMemWLUT[0x1f80] = (u8 *)psxH;
 119
 120         return 0;
 121 }
 122
 123 void psxMemReset() {
 124         FILE *f = NULL;
 125         char bios[1024];
 126
 127         memset(psxM, 0, 0x00200000);
 128         memset(psxP, 0, 0x00010000);
 129
 130         if (strcmp(Config.Bios, "HLE") != 0) {
 131                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 132                 f = fopen(bios, "rb");
 133
 134                 if (f == NULL) {
 135                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 136                         memset(psxR, 0, 0x80000);
 137                         Config.HLE = TRUE;
 138                 } else {
 139                         fread(psxR, 1, 0x80000, f);
 140                         fclose(f);
 141                         Config.HLE = FALSE;
 142                 }
 143         } else Config.HLE = TRUE;
 144 }
 145
 146 void psxMemShutdown() {
 147         munmap(psxM, 0x00210000);
 148         munmap(psxH, 0x1f800000);
 149         munmap(psxR, 0x80000);
 150
 151         free(psxMemRLUT);
 152         free(psxMemWLUT);
 153 }
 154
 155 static int writeok = 1;
 156
 157 u8 psxMemRead8(u32 mem) {
 158         char *p;
 159         u32 t;
 160
 161         t = mem >> 16;
 162         if (t == 0x1f80) {
 163                 if (mem < 0x1f801000)
 164                         return psxHu8(mem);
 165                 else
 166                         return psxHwRead8(mem);
 167         } else {
 168                 p = (char *)(psxMemRLUT[t]);
 169                 if (p != NULL) {
 170                         if (Config.Debug)
 171                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 172                         return *(u8 *)(p + (mem & 0xffff));
 173                 } else {
 174 #ifdef PSXMEM_LOG
 175                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 176 #endif
 177                         return 0;
 178                 }
 179         }
 180 }
 181
 182 u16 psxMemRead16(u32 mem) {
 183         char *p;
 184         u32 t;
 185
 186         t = mem >> 16;
 187         if (t == 0x1f80) {
 188                 if (mem < 0x1f801000)
 189                         return psxHu16(mem);
 190                 else
 191                         return psxHwRead16(mem);
 192         } else {
 193                 p = (char *)(psxMemRLUT[t]);
 194                 if (p != NULL) {
 195                         if (Config.Debug)
 196                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 197                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 198                 } else {
 199 #ifdef PSXMEM_LOG
 200                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 201 #endif
 202                         return 0;
 203                 }
 204         }
 205 }
 206
 207 u32 psxMemRead32(u32 mem) {
 208         char *p;
 209         u32 t;
 210
 211         t = mem >> 16;
 212         if (t == 0x1f80) {
 213                 if (mem < 0x1f801000)
 214                         return psxHu32(mem);
 215                 else
 216                         return psxHwRead32(mem);
 217         } else {
 218                 p = (char *)(psxMemRLUT[t]);
 219                 if (p != NULL) {
 220                         if (Config.Debug)
 221                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 222                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 223                 } else {
 224 #ifdef PSXMEM_LOG
 225                         if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
 226 #endif
 227                         return 0;
 228                 }
 229         }
 230 }
 231
 232 void psxMemWrite8(u32 mem, u8 value) {
 233         char *p;
 234         u32 t;
 235
 236         t = mem >> 16;
 237         if (t == 0x1f80) {
 238                 if (mem < 0x1f801000)
 239                         psxHu8(mem) = value;
 240                 else
 241                         psxHwWrite8(mem, value);
 242         } else {
 243                 p = (char *)(psxMemWLUT[t]);
 244                 if (p != NULL) {
 245                         if (Config.Debug)
 246                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 247                         *(u8 *)(p + (mem & 0xffff)) = value;
 248 #ifdef PSXREC
 249                         psxCpu->Clear((mem & (~3)), 1);
 250 #endif
 251                 } else {
 252 #ifdef PSXMEM_LOG
 253                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 254 #endif
 255                 }
 256         }
 257 }
 258
 259 void psxMemWrite16(u32 mem, u16 value) {
 260         char *p;
 261         u32 t;
 262
 263         t = mem >> 16;
 264         if (t == 0x1f80) {
 265                 if (mem < 0x1f801000)
 266                         psxHu16ref(mem) = SWAPu16(value);
 267                 else
 268                         psxHwWrite16(mem, value);
 269         } else {
 270                 p = (char *)(psxMemWLUT[t]);
 271                 if (p != NULL) {
 272                         if (Config.Debug)
 273                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 274                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 275 #ifdef PSXREC
 276                         psxCpu->Clear((mem & (~3)), 1);
 277 #endif
 278                 } else {
 279 #ifdef PSXMEM_LOG
 280                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 281 #endif
 282                 }
 283         }
 284 }
 285
 286 void psxMemWrite32(u32 mem, u32 value) {
 287         char *p;
 288         u32 t;
 289
 290 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 291         t = mem >> 16;
 292         if (t == 0x1f80) {
 293                 if (mem < 0x1f801000)
 294                         psxHu32ref(mem) = SWAPu32(value);
 295                 else
 296                         psxHwWrite32(mem, value);
 297         } else {
 298                 p = (char *)(psxMemWLUT[t]);
 299                 if (p != NULL) {
 300                         if (Config.Debug)
 301                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 302                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 303 #ifdef PSXREC
 304                         psxCpu->Clear(mem, 1);
 305 #endif
 306                 } else {
 307                         if (mem != 0xfffe0130) {
 308 #ifdef PSXREC
 309                                 if (!writeok)
 310                                         psxCpu->Clear(mem, 1);
 311 #endif
 312
 313 #ifdef PSXMEM_LOG
 314                                 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
 315 #endif
 316                         } else {
 317                                 int i;
 318
 319                                 switch (value) {
 320                                         case 0x800: case 0x804:
 321                                                 if (writeok == 0) break;
 322                                                 writeok = 0;
 323                                                 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
 324                                                 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
 325                                                 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
 326                                                 break;
 327                                         case 0x00: case 0x1e988:
 328                                                 if (writeok == 1) break;
 329                                                 writeok = 1;
 330                                                 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
 331                                                 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 332                                                 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 333                                                 break;
 334                                         default:
 335 #ifdef PSXMEM_LOG
 336                                                 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
 337 #endif
 338                                                 break;
 339                                 }
 340                         }
 341                 }
 342         }
 343 }
 344
 345 void *psxMemPointer(u32 mem) {
 346         char *p;
 347         u32 t;
 348
 349         t = mem >> 16;
 350         if (t == 0x1f80) {
 351                 if (mem < 0x1f801000)
 352                         return (void *)&psxH[mem];
 353                 else
 354                         return NULL;
 355         } else {
 356                 p = (char *)(psxMemWLUT[t]);
 357                 if (p != NULL) {
 358                         return (void *)(p + (mem & 0xffff));
 359                 }
 360                 return NULL;
 361         }
 362 }