1 /***************************************************************************
2 * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
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. *
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. *
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 ***************************************************************************/
21 * PSX memory functions.
24 // TODO: Implement caches & cycle penalty.
32 #define MAP_ANONYMOUS MAP_ANON
35 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
36 s8 *psxP = NULL; // Parallel Port (64K)
37 s8 *psxR = NULL; // BIOS ROM (512K)
38 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
40 u8 **psxMemWLUT = NULL;
41 u8 **psxMemRLUT = NULL;
43 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
44 0x0000_0000-0x0000_ffff Kernel (64K)
45 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
47 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
49 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
51 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
53 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
55 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
56 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
58 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
59 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
65 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
66 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
67 memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
68 memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
70 psxM = mmap((void *)0x80000000, 0x00220000,
71 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
73 psxP = &psxM[0x200000];
74 psxH = &psxM[0x210000];
76 psxR = mmap((void *)0x9fc00000, 0x80000,
77 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
79 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
80 psxM != (void *)0x80000000 || psxR != (void *)0x9fc00000 ||
81 psxP == NULL || psxH == NULL) {
82 SysMessage(_("Error allocating memory!"));
87 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
89 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
90 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
92 psxMemRLUT[0x1f00] = (u8 *)psxP;
93 psxMemRLUT[0x1f80] = (u8 *)psxH;
95 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
97 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
98 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
101 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
103 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
104 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
106 psxMemWLUT[0x1f00] = (u8 *)psxP;
107 psxMemWLUT[0x1f80] = (u8 *)psxH;
116 memset(psxM, 0, 0x00200000);
117 memset(psxP, 0, 0x00010000);
119 if (strcmp(Config.Bios, "HLE") != 0) {
120 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
121 f = fopen(bios, "rb");
124 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
125 memset(psxR, 0, 0x80000);
128 fread(psxR, 1, 0x80000, f);
132 } else Config.HLE = TRUE;
135 void psxMemShutdown() {
136 munmap(psxM, 0x00220000);
137 munmap(psxR, 0x80000);
143 static int writeok = 1;
145 u8 psxMemRead8(u32 mem) {
151 if (mem < 0x1f801000)
154 return psxHwRead8(mem);
156 p = (char *)(psxMemRLUT[t]);
159 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
160 return *(u8 *)(p + (mem & 0xffff));
163 PSXMEM_LOG("err lb %8.8lx\n", mem);
170 u16 psxMemRead16(u32 mem) {
176 if (mem < 0x1f801000)
179 return psxHwRead16(mem);
181 p = (char *)(psxMemRLUT[t]);
184 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
185 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
188 PSXMEM_LOG("err lh %8.8lx\n", mem);
195 u32 psxMemRead32(u32 mem) {
201 if (mem < 0x1f801000)
204 return psxHwRead32(mem);
206 p = (char *)(psxMemRLUT[t]);
209 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
210 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
213 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
220 void psxMemWrite8(u32 mem, u8 value) {
226 if (mem < 0x1f801000)
229 psxHwWrite8(mem, value);
231 p = (char *)(psxMemWLUT[t]);
234 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
235 *(u8 *)(p + (mem & 0xffff)) = value;
237 psxCpu->Clear((mem & (~3)), 1);
241 PSXMEM_LOG("err sb %8.8lx\n", mem);
247 void psxMemWrite16(u32 mem, u16 value) {
253 if (mem < 0x1f801000)
254 psxHu16ref(mem) = SWAPu16(value);
256 psxHwWrite16(mem, value);
258 p = (char *)(psxMemWLUT[t]);
261 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
262 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
264 psxCpu->Clear((mem & (~3)), 1);
268 PSXMEM_LOG("err sh %8.8lx\n", mem);
274 void psxMemWrite32(u32 mem, u32 value) {
278 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
281 if (mem < 0x1f801000)
282 psxHu32ref(mem) = SWAPu32(value);
284 psxHwWrite32(mem, value);
286 p = (char *)(psxMemWLUT[t]);
289 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
290 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
292 psxCpu->Clear(mem, 1);
295 if (mem != 0xfffe0130) {
298 psxCpu->Clear(mem, 1);
302 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
308 case 0x800: case 0x804:
309 if (writeok == 0) break;
311 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
312 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
313 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
315 case 0x00: case 0x1e988:
316 if (writeok == 1) break;
318 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
319 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
320 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
324 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
333 void *psxMemPointer(u32 mem) {
339 if (mem < 0x1f801000)
340 return (void *)&psxH[mem];
344 p = (char *)(psxMemWLUT[t]);
346 return (void *)(p + (mem & 0xffff));