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.
33 #define MAP_ANONYMOUS MAP_ANON
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)
41 u8 **psxMemWLUT = NULL;
42 u8 **psxMemRLUT = NULL;
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)
48 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
50 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
52 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
54 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
56 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
57 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
59 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
60 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
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 *));
71 psxM = mmap((void *)0x80000000, 0x00210000,
72 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
74 psxP = &psxM[0x200000];
75 psxH = mmap((void *)0x1f800000, 0x00010000,
76 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
78 psxR = mmap((void *)0x1fc00000, 0x80000,
79 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
81 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
82 psxM != (void *)0x80000000 || psxR == MAP_FAILED ||
83 psxP == NULL || psxH != (void *)0x1f800000) {
84 SysMessage(_("Error allocating memory!"));
89 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
91 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
92 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
94 psxMemRLUT[0x1f00] = (u8 *)psxP;
95 psxMemRLUT[0x1f80] = (u8 *)psxH;
97 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
99 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
100 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
103 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
105 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
106 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
108 psxMemWLUT[0x1f00] = (u8 *)psxP;
109 psxMemWLUT[0x1f80] = (u8 *)psxH;
118 memset(psxM, 0, 0x00200000);
119 memset(psxP, 0, 0x00010000);
121 if (strcmp(Config.Bios, "HLE") != 0) {
122 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
123 f = fopen(bios, "rb");
126 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
127 memset(psxR, 0, 0x80000);
130 fread(psxR, 1, 0x80000, f);
134 } else Config.HLE = TRUE;
137 void psxMemShutdown() {
138 munmap(psxM, 0x00210000);
139 munmap(psxH, 0x1f800000);
140 munmap(psxR, 0x80000);
146 static int writeok = 1;
148 u8 psxMemRead8(u32 mem) {
154 if (mem < 0x1f801000)
157 return psxHwRead8(mem);
159 p = (char *)(psxMemRLUT[t]);
162 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
163 return *(u8 *)(p + (mem & 0xffff));
166 PSXMEM_LOG("err lb %8.8lx\n", mem);
173 u16 psxMemRead16(u32 mem) {
179 if (mem < 0x1f801000)
182 return psxHwRead16(mem);
184 p = (char *)(psxMemRLUT[t]);
187 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
188 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
191 PSXMEM_LOG("err lh %8.8lx\n", mem);
198 u32 psxMemRead32(u32 mem) {
204 if (mem < 0x1f801000)
207 return psxHwRead32(mem);
209 p = (char *)(psxMemRLUT[t]);
212 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
213 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
216 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
223 void psxMemWrite8(u32 mem, u8 value) {
229 if (mem < 0x1f801000)
232 psxHwWrite8(mem, value);
234 p = (char *)(psxMemWLUT[t]);
237 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
238 *(u8 *)(p + (mem & 0xffff)) = value;
240 psxCpu->Clear((mem & (~3)), 1);
244 PSXMEM_LOG("err sb %8.8lx\n", mem);
250 void psxMemWrite16(u32 mem, u16 value) {
256 if (mem < 0x1f801000)
257 psxHu16ref(mem) = SWAPu16(value);
259 psxHwWrite16(mem, value);
261 p = (char *)(psxMemWLUT[t]);
264 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
265 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
267 psxCpu->Clear((mem & (~3)), 1);
271 PSXMEM_LOG("err sh %8.8lx\n", mem);
277 void psxMemWrite32(u32 mem, u32 value) {
281 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
284 if (mem < 0x1f801000)
285 psxHu32ref(mem) = SWAPu32(value);
287 psxHwWrite32(mem, value);
289 p = (char *)(psxMemWLUT[t]);
292 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
293 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
295 psxCpu->Clear(mem, 1);
298 if (mem != 0xfffe0130) {
301 psxCpu->Clear(mem, 1);
305 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
311 case 0x800: case 0x804:
312 if (writeok == 0) break;
314 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
315 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
316 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
318 case 0x00: case 0x1e988:
319 if (writeok == 1) break;
321 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
322 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
323 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
327 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
336 void *psxMemPointer(u32 mem) {
342 if (mem < 0x1f801000)
343 return (void *)&psxH[mem];
347 p = (char *)(psxMemWLUT[t]);
349 return (void *)(p + (mem & 0xffff));