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.
27 #include "psxmem_map.h"
34 #define MAP_ANONYMOUS MAP_ANON
37 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
39 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
41 void *psxMap(unsigned long addr, size_t size, int is_fixed,
44 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
47 if (psxMapHook != NULL)
48 return psxMapHook(addr, size, is_fixed, tag);
54 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
55 if (ret == MAP_FAILED)
59 SysMessage("psxMap: warning: wanted to map @%p, got %p\n",
65 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
67 if (psxUnmapHook != NULL) {
68 psxUnmapHook(ptr, size, tag);
75 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
76 s8 *psxP = NULL; // Parallel Port (64K)
77 s8 *psxR = NULL; // BIOS ROM (512K)
78 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
80 u8 **psxMemWLUT = NULL;
81 u8 **psxMemRLUT = NULL;
83 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
84 0x0000_0000-0x0000_ffff Kernel (64K)
85 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
87 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
89 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
91 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
93 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
95 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
96 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
98 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
99 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
105 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
106 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
107 memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
108 memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
110 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
113 psxM = psxMap(0x70000000, 0x00210000, 0, MAP_TAG_RAM);
116 SysMessage(_("mapping main RAM failed"));
120 psxP = &psxM[0x200000];
121 psxH = psxMap(0x1f800000, 0x10000, 1, MAP_TAG_OTHER);
122 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
124 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
125 psxR == NULL || psxP == NULL || psxH != (void *)0x1f800000) {
126 SysMessage(_("Error allocating memory!"));
131 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
133 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
134 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
136 psxMemRLUT[0x1f00] = (u8 *)psxP;
137 psxMemRLUT[0x1f80] = (u8 *)psxH;
139 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
141 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
142 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
145 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
147 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
148 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
150 psxMemWLUT[0x1f00] = (u8 *)psxP;
151 psxMemWLUT[0x1f80] = (u8 *)psxH;
160 memset(psxM, 0, 0x00200000);
161 memset(psxP, 0, 0x00010000);
163 if (strcmp(Config.Bios, "HLE") != 0) {
164 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
165 f = fopen(bios, "rb");
168 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
169 memset(psxR, 0, 0x80000);
172 fread(psxR, 1, 0x80000, f);
176 } else Config.HLE = TRUE;
179 void psxMemShutdown() {
180 psxUnmap(psxM, 0x00210000, MAP_TAG_RAM);
181 psxUnmap(psxH, 0x1f800000, MAP_TAG_OTHER);
182 psxUnmap(psxR, 0x80000, MAP_TAG_OTHER);
188 static int writeok = 1;
190 u8 psxMemRead8(u32 mem) {
196 if (mem < 0x1f801000)
199 return psxHwRead8(mem);
201 p = (char *)(psxMemRLUT[t]);
204 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
205 return *(u8 *)(p + (mem & 0xffff));
208 PSXMEM_LOG("err lb %8.8lx\n", mem);
215 u16 psxMemRead16(u32 mem) {
221 if (mem < 0x1f801000)
224 return psxHwRead16(mem);
226 p = (char *)(psxMemRLUT[t]);
229 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
230 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
233 PSXMEM_LOG("err lh %8.8lx\n", mem);
240 u32 psxMemRead32(u32 mem) {
246 if (mem < 0x1f801000)
249 return psxHwRead32(mem);
251 p = (char *)(psxMemRLUT[t]);
254 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
255 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
258 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
265 void psxMemWrite8(u32 mem, u8 value) {
271 if (mem < 0x1f801000)
274 psxHwWrite8(mem, value);
276 p = (char *)(psxMemWLUT[t]);
279 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
280 *(u8 *)(p + (mem & 0xffff)) = value;
282 psxCpu->Clear((mem & (~3)), 1);
286 PSXMEM_LOG("err sb %8.8lx\n", mem);
292 void psxMemWrite16(u32 mem, u16 value) {
298 if (mem < 0x1f801000)
299 psxHu16ref(mem) = SWAPu16(value);
301 psxHwWrite16(mem, value);
303 p = (char *)(psxMemWLUT[t]);
306 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
307 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
309 psxCpu->Clear((mem & (~3)), 1);
313 PSXMEM_LOG("err sh %8.8lx\n", mem);
319 void psxMemWrite32(u32 mem, u32 value) {
323 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
326 if (mem < 0x1f801000)
327 psxHu32ref(mem) = SWAPu32(value);
329 psxHwWrite32(mem, value);
331 p = (char *)(psxMemWLUT[t]);
334 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
335 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
337 psxCpu->Clear(mem, 1);
340 if (mem != 0xfffe0130) {
343 psxCpu->Clear(mem, 1);
347 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
353 case 0x800: case 0x804:
354 if (writeok == 0) break;
356 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
357 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
358 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
360 case 0x00: case 0x1e988:
361 if (writeok == 1) break;
363 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
364 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
365 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
369 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
378 void *psxMemPointer(u32 mem) {
384 if (mem < 0x1f801000)
385 return (void *)&psxH[mem];
389 p = (char *)(psxMemWLUT[t]);
391 return (void *)(p + (mem & 0xffff));