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, -1, 0);
  73
  74         psxP = &psxM[0x200000];
  75         psxH = mmap((void *)0x1f800000, 0x00010000,
  76                 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  77
  78         psxR = mmap((void *)0x9fc00000, 0x80000,
  79                 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  80
  81         if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
  82                 psxM != (void *)0x80000000 || psxR != (void *)0x9fc00000 ||
  83                 psxP == NULL || psxH != (void *)0x1f800000) {
  84                 SysMessage(_("Error allocating memory!"));
  85                 return -1;
  86         }
  87
  88 // MemR
  89         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
  90
  91         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
  92         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
  93
  94         psxMemRLUT[0x1f00] = (u8 *)psxP;
  95         psxMemRLUT[0x1f80] = (u8 *)psxH;
  96
  97         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
  98
  99         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 100         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 101
 102 // MemW
 103         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 104
 105         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 106         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 107
 108         psxMemWLUT[0x1f00] = (u8 *)psxP;
 109         psxMemWLUT[0x1f80] = (u8 *)psxH;
 110
 111         return 0;
 112 }
 113
 114 void psxMemReset() {
 115         FILE *f = NULL;
 116         char bios[1024];
 117
 118         memset(psxM, 0, 0x00200000);
 119         memset(psxP, 0, 0x00010000);
 120
 121         if (strcmp(Config.Bios, "HLE") != 0) {
 122                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 123                 f = fopen(bios, "rb");
 124
 125                 if (f == NULL) {
 126                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 127                         memset(psxR, 0, 0x80000);
 128                         Config.HLE = TRUE;
 129                 } else {
 130                         fread(psxR, 1, 0x80000, f);
 131                         fclose(f);
 132                         Config.HLE = FALSE;
 133                 }
 134         } else Config.HLE = TRUE;
 135 }
 136
 137 void psxMemShutdown() {
 138         munmap(psxM, 0x00220000);
 139         munmap(psxR, 0x80000);
 140
 141         free(psxMemRLUT);
 142         free(psxMemWLUT);
 143 }
 144
 145 static int writeok = 1;
 146
 147 u8 psxMemRead8(u32 mem) {
 148         char *p;
 149         u32 t;
 150
 151         t = mem >> 16;
 152         if (t == 0x1f80) {
 153                 if (mem < 0x1f801000)
 154                         return psxHu8(mem);
 155                 else
 156                         return psxHwRead8(mem);
 157         } else {
 158                 p = (char *)(psxMemRLUT[t]);
 159                 if (p != NULL) {
 160                         if (Config.Debug)
 161                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 162                         return *(u8 *)(p + (mem & 0xffff));
 163                 } else {
 164 #ifdef PSXMEM_LOG
 165                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 166 #endif
 167                         return 0;
 168                 }
 169         }
 170 }
 171
 172 u16 psxMemRead16(u32 mem) {
 173         char *p;
 174         u32 t;
 175
 176         t = mem >> 16;
 177         if (t == 0x1f80) {
 178                 if (mem < 0x1f801000)
 179                         return psxHu16(mem);
 180                 else
 181                         return psxHwRead16(mem);
 182         } else {
 183                 p = (char *)(psxMemRLUT[t]);
 184                 if (p != NULL) {
 185                         if (Config.Debug)
 186                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 187                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 188                 } else {
 189 #ifdef PSXMEM_LOG
 190                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 191 #endif
 192                         return 0;
 193                 }
 194         }
 195 }
 196
 197 u32 psxMemRead32(u32 mem) {
 198         char *p;
 199         u32 t;
 200
 201         t = mem >> 16;
 202         if (t == 0x1f80) {
 203                 if (mem < 0x1f801000)
 204                         return psxHu32(mem);
 205                 else
 206                         return psxHwRead32(mem);
 207         } else {
 208                 p = (char *)(psxMemRLUT[t]);
 209                 if (p != NULL) {
 210                         if (Config.Debug)
 211                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 212                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 213                 } else {
 214 #ifdef PSXMEM_LOG
 215                         if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
 216 #endif
 217                         return 0;
 218                 }
 219         }
 220 }
 221
 222 void psxMemWrite8(u32 mem, u8 value) {
 223         char *p;
 224         u32 t;
 225
 226         t = mem >> 16;
 227         if (t == 0x1f80) {
 228                 if (mem < 0x1f801000)
 229                         psxHu8(mem) = value;
 230                 else
 231                         psxHwWrite8(mem, value);
 232         } else {
 233                 p = (char *)(psxMemWLUT[t]);
 234                 if (p != NULL) {
 235                         if (Config.Debug)
 236                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 237                         *(u8 *)(p + (mem & 0xffff)) = value;
 238 #ifdef PSXREC
 239                         psxCpu->Clear((mem & (~3)), 1);
 240 #endif
 241                 } else {
 242 #ifdef PSXMEM_LOG
 243                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 244 #endif
 245                 }
 246         }
 247 }
 248
 249 void psxMemWrite16(u32 mem, u16 value) {
 250         char *p;
 251         u32 t;
 252
 253         t = mem >> 16;
 254         if (t == 0x1f80) {
 255                 if (mem < 0x1f801000)
 256                         psxHu16ref(mem) = SWAPu16(value);
 257                 else
 258                         psxHwWrite16(mem, value);
 259         } else {
 260                 p = (char *)(psxMemWLUT[t]);
 261                 if (p != NULL) {
 262                         if (Config.Debug)
 263                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 264                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 265 #ifdef PSXREC
 266                         psxCpu->Clear((mem & (~3)), 1);
 267 #endif
 268                 } else {
 269 #ifdef PSXMEM_LOG
 270                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 271 #endif
 272                 }
 273         }
 274 }
 275
 276 void psxMemWrite32(u32 mem, u32 value) {
 277         char *p;
 278         u32 t;
 279
 280 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 281         t = mem >> 16;
 282         if (t == 0x1f80) {
 283                 if (mem < 0x1f801000)
 284                         psxHu32ref(mem) = SWAPu32(value);
 285                 else
 286                         psxHwWrite32(mem, value);
 287         } else {
 288                 p = (char *)(psxMemWLUT[t]);
 289                 if (p != NULL) {
 290                         if (Config.Debug)
 291                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 292                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 293 #ifdef PSXREC
 294                         psxCpu->Clear(mem, 1);
 295 #endif
 296                 } else {
 297                         if (mem != 0xfffe0130) {
 298 #ifdef PSXREC
 299                                 if (!writeok)
 300                                         psxCpu->Clear(mem, 1);
 301 #endif
 302
 303 #ifdef PSXMEM_LOG
 304                                 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
 305 #endif
 306                         } else {
 307                                 int i;
 308
 309                                 switch (value) {
 310                                         case 0x800: case 0x804:
 311                                                 if (writeok == 0) break;
 312                                                 writeok = 0;
 313                                                 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
 314                                                 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
 315                                                 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
 316                                                 break;
 317                                         case 0x00: case 0x1e988:
 318                                                 if (writeok == 1) break;
 319                                                 writeok = 1;
 320                                                 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
 321                                                 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 322                                                 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 323                                                 break;
 324                                         default:
 325 #ifdef PSXMEM_LOG
 326                                                 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
 327 #endif
 328                                                 break;
 329                                 }
 330                         }
 331                 }
 332         }
 333 }
 334
 335 void *psxMemPointer(u32 mem) {
 336         char *p;
 337         u32 t;
 338
 339         t = mem >> 16;
 340         if (t == 0x1f80) {
 341                 if (mem < 0x1f801000)
 342                         return (void *)&psxH[mem];
 343                 else
 344                         return NULL;
 345         } else {
 346                 p = (char *)(psxMemWLUT[t]);
 347                 if (p != NULL) {
 348                         return (void *)(p + (mem & 0xffff));
 349                 }
 350                 return NULL;
 351         }
 352 }