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, 0x00220000,
  72                 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  73
  74         psxP = &psxM[0x200000];
  75         psxH = &psxM[0x210000];
  76
  77         psxR = mmap((void *)0x9fc00000, 0x80000,
  78                 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  79
  80         if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
  81                 psxM != (void *)0x80000000 || psxR != (void *)0x9fc00000 ||
  82                 psxP == NULL || psxH == NULL) {
  83                 SysMessage(_("Error allocating memory!"));
  84                 return -1;
  85         }
  86
  87 // MemR
  88         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
  89
  90         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
  91         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
  92
  93         psxMemRLUT[0x1f00] = (u8 *)psxP;
  94         psxMemRLUT[0x1f80] = (u8 *)psxH;
  95
  96         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
  97
  98         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
  99         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 100
 101 // MemW
 102         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 103
 104         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 105         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 106
 107         psxMemWLUT[0x1f00] = (u8 *)psxP;
 108         psxMemWLUT[0x1f80] = (u8 *)psxH;
 109
 110         return 0;
 111 }
 112
 113 void psxMemReset() {
 114         FILE *f = NULL;
 115         char bios[1024];
 116
 117         memset(psxM, 0, 0x00200000);
 118         memset(psxP, 0, 0x00010000);
 119
 120         if (strcmp(Config.Bios, "HLE") != 0) {
 121                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 122                 f = fopen(bios, "rb");
 123
 124                 if (f == NULL) {
 125                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 126                         memset(psxR, 0, 0x80000);
 127                         Config.HLE = TRUE;
 128                 } else {
 129                         fread(psxR, 1, 0x80000, f);
 130                         fclose(f);
 131                         Config.HLE = FALSE;
 132                 }
 133         } else Config.HLE = TRUE;
 134 }
 135
 136 void psxMemShutdown() {
 137         munmap(psxM, 0x00220000);
 138         munmap(psxR, 0x80000);
 139
 140         free(psxMemRLUT);
 141         free(psxMemWLUT);
 142 }
 143
 144 static int writeok = 1;
 145
 146 u8 psxMemRead8(u32 mem) {
 147         char *p;
 148         u32 t;
 149
 150         t = mem >> 16;
 151         if (t == 0x1f80) {
 152                 if (mem < 0x1f801000)
 153                         return psxHu8(mem);
 154                 else
 155                         return psxHwRead8(mem);
 156         } else {
 157                 p = (char *)(psxMemRLUT[t]);
 158                 if (p != NULL) {
 159                         if (Config.Debug)
 160                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 161                         return *(u8 *)(p + (mem & 0xffff));
 162                 } else {
 163 #ifdef PSXMEM_LOG
 164                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 165 #endif
 166                         return 0;
 167                 }
 168         }
 169 }
 170
 171 u16 psxMemRead16(u32 mem) {
 172         char *p;
 173         u32 t;
 174
 175         t = mem >> 16;
 176         if (t == 0x1f80) {
 177                 if (mem < 0x1f801000)
 178                         return psxHu16(mem);
 179                 else
 180                         return psxHwRead16(mem);
 181         } else {
 182                 p = (char *)(psxMemRLUT[t]);
 183                 if (p != NULL) {
 184                         if (Config.Debug)
 185                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 186                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 187                 } else {
 188 #ifdef PSXMEM_LOG
 189                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 190 #endif
 191                         return 0;
 192                 }
 193         }
 194 }
 195
 196 u32 psxMemRead32(u32 mem) {
 197         char *p;
 198         u32 t;
 199
 200         t = mem >> 16;
 201         if (t == 0x1f80) {
 202                 if (mem < 0x1f801000)
 203                         return psxHu32(mem);
 204                 else
 205                         return psxHwRead32(mem);
 206         } else {
 207                 p = (char *)(psxMemRLUT[t]);
 208                 if (p != NULL) {
 209                         if (Config.Debug)
 210                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 211                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 212                 } else {
 213 #ifdef PSXMEM_LOG
 214                         if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
 215 #endif
 216                         return 0;
 217                 }
 218         }
 219 }
 220
 221 void psxMemWrite8(u32 mem, u8 value) {
 222         char *p;
 223         u32 t;
 224
 225         t = mem >> 16;
 226         if (t == 0x1f80) {
 227                 if (mem < 0x1f801000)
 228                         psxHu8(mem) = value;
 229                 else
 230                         psxHwWrite8(mem, value);
 231         } else {
 232                 p = (char *)(psxMemWLUT[t]);
 233                 if (p != NULL) {
 234                         if (Config.Debug)
 235                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 236                         *(u8 *)(p + (mem & 0xffff)) = value;
 237 #ifdef PSXREC
 238                         psxCpu->Clear((mem & (~3)), 1);
 239 #endif
 240                 } else {
 241 #ifdef PSXMEM_LOG
 242                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 243 #endif
 244                 }
 245         }
 246 }
 247
 248 void psxMemWrite16(u32 mem, u16 value) {
 249         char *p;
 250         u32 t;
 251
 252         t = mem >> 16;
 253         if (t == 0x1f80) {
 254                 if (mem < 0x1f801000)
 255                         psxHu16ref(mem) = SWAPu16(value);
 256                 else
 257                         psxHwWrite16(mem, value);
 258         } else {
 259                 p = (char *)(psxMemWLUT[t]);
 260                 if (p != NULL) {
 261                         if (Config.Debug)
 262                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 263                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 264 #ifdef PSXREC
 265                         psxCpu->Clear((mem & (~3)), 1);
 266 #endif
 267                 } else {
 268 #ifdef PSXMEM_LOG
 269                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 270 #endif
 271                 }
 272         }
 273 }
 274
 275 void psxMemWrite32(u32 mem, u32 value) {
 276         char *p;
 277         u32 t;
 278
 279 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 280         t = mem >> 16;
 281         if (t == 0x1f80) {
 282                 if (mem < 0x1f801000)
 283                         psxHu32ref(mem) = SWAPu32(value);
 284                 else
 285                         psxHwWrite32(mem, value);
 286         } else {
 287                 p = (char *)(psxMemWLUT[t]);
 288                 if (p != NULL) {
 289                         if (Config.Debug)
 290                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 291                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 292 #ifdef PSXREC
 293                         psxCpu->Clear(mem, 1);
 294 #endif
 295                 } else {
 296                         if (mem != 0xfffe0130) {
 297 #ifdef PSXREC
 298                                 if (!writeok)
 299                                         psxCpu->Clear(mem, 1);
 300 #endif
 301
 302 #ifdef PSXMEM_LOG
 303                                 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
 304 #endif
 305                         } else {
 306                                 int i;
 307
 308                                 switch (value) {
 309                                         case 0x800: case 0x804:
 310                                                 if (writeok == 0) break;
 311                                                 writeok = 0;
 312                                                 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
 313                                                 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
 314                                                 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
 315                                                 break;
 316                                         case 0x00: case 0x1e988:
 317                                                 if (writeok == 1) break;
 318                                                 writeok = 1;
 319                                                 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
 320                                                 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 321                                                 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 322                                                 break;
 323                                         default:
 324 #ifdef PSXMEM_LOG
 325                                                 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
 326 #endif
 327                                                 break;
 328                                 }
 329                         }
 330                 }
 331         }
 332 }
 333
 334 void *psxMemPointer(u32 mem) {
 335         char *p;
 336         u32 t;
 337
 338         t = mem >> 16;
 339         if (t == 0x1f80) {
 340                 if (mem < 0x1f801000)
 341                         return (void *)&psxH[mem];
 342                 else
 343                         return NULL;
 344         } else {
 345                 p = (char *)(psxMemWLUT[t]);
 346                 if (p != NULL) {
 347                         return (void *)(p + (mem & 0xffff));
 348                 }
 349                 return NULL;
 350         }
 351 }