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;
45 int tried_to_align = 0;
50 if (psxMapHook != NULL) {
51 ret = psxMapHook(addr, size, is_fixed, tag);
55 /* avoid MAP_FIXED, it overrides existing mappings.. */
57 flags |= MAP_FIXED; */
60 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
61 if (ret == MAP_FAILED)
65 if (addr != 0 && ret != (void *)addr) {
66 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
70 psxUnmap(ret, size, tag);
74 if (ret != NULL && ((addr ^ (long)ret) & 0x00ffffff)
77 psxUnmap(ret, size, tag);
79 // try to use similarly aligned memory instead
80 // (recompiler needs this)
81 mask = (addr - 1) & ~addr & 0x07ffffff;
82 addr = (unsigned long)(ret + mask) & ~mask;
91 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
93 if (psxUnmapHook != NULL) {
94 psxUnmapHook(ptr, size, tag);
101 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
102 s8 *psxP = NULL; // Parallel Port (64K)
103 s8 *psxR = NULL; // BIOS ROM (512K)
104 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
106 u8 **psxMemWLUT = NULL;
107 u8 **psxMemRLUT = NULL;
109 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
110 0x0000_0000-0x0000_ffff Kernel (64K)
111 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
113 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
115 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
117 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
119 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
121 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
122 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
124 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
125 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
131 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
132 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
133 memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
134 memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
136 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
138 #ifdef __BLACKBERRY_QNX__
140 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
143 psxM = psxMap(0x78000000, 0x00210000, 0, MAP_TAG_RAM);
147 SysMessage(_("mapping main RAM failed"));
151 psxP = &psxM[0x200000];
152 psxH = psxMap(0x1f800000, 0x10000, 1, MAP_TAG_OTHER);
153 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
155 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
156 psxR == NULL || psxP == NULL || psxH != (void *)0x1f800000) {
157 SysMessage(_("Error allocating memory!"));
162 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
164 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
165 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
167 psxMemRLUT[0x1f00] = (u8 *)psxP;
168 psxMemRLUT[0x1f80] = (u8 *)psxH;
170 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
172 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
173 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
176 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
178 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
179 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
181 psxMemWLUT[0x1f00] = (u8 *)psxP;
182 psxMemWLUT[0x1f80] = (u8 *)psxH;
191 memset(psxM, 0, 0x00200000);
192 memset(psxP, 0, 0x00010000);
194 if (strcmp(Config.Bios, "HLE") != 0) {
195 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
196 f = fopen(bios, "rb");
199 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
200 memset(psxR, 0, 0x80000);
203 fread(psxR, 1, 0x80000, f);
207 } else Config.HLE = TRUE;
210 void psxMemShutdown() {
211 psxUnmap(psxM, 0x00210000, MAP_TAG_RAM);
212 psxUnmap(psxH, 0x10000, MAP_TAG_OTHER);
213 psxUnmap(psxR, 0x80000, MAP_TAG_OTHER);
219 static int writeok = 1;
221 u8 psxMemRead8(u32 mem) {
226 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
227 if ((mem & 0xffff) < 0x400)
230 return psxHwRead8(mem);
232 p = (char *)(psxMemRLUT[t]);
235 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
236 return *(u8 *)(p + (mem & 0xffff));
239 PSXMEM_LOG("err lb %8.8lx\n", mem);
246 u16 psxMemRead16(u32 mem) {
251 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
252 if ((mem & 0xffff) < 0x400)
255 return psxHwRead16(mem);
257 p = (char *)(psxMemRLUT[t]);
260 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
261 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
264 PSXMEM_LOG("err lh %8.8lx\n", mem);
271 u32 psxMemRead32(u32 mem) {
276 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
277 if ((mem & 0xffff) < 0x400)
280 return psxHwRead32(mem);
282 p = (char *)(psxMemRLUT[t]);
285 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
286 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
289 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
296 void psxMemWrite8(u32 mem, u8 value) {
301 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
302 if ((mem & 0xffff) < 0x400)
305 psxHwWrite8(mem, value);
307 p = (char *)(psxMemWLUT[t]);
310 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
311 *(u8 *)(p + (mem & 0xffff)) = value;
313 psxCpu->Clear((mem & (~3)), 1);
317 PSXMEM_LOG("err sb %8.8lx\n", mem);
323 void psxMemWrite16(u32 mem, u16 value) {
328 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
329 if ((mem & 0xffff) < 0x400)
330 psxHu16ref(mem) = SWAPu16(value);
332 psxHwWrite16(mem, value);
334 p = (char *)(psxMemWLUT[t]);
337 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
338 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
340 psxCpu->Clear((mem & (~3)), 1);
344 PSXMEM_LOG("err sh %8.8lx\n", mem);
350 void psxMemWrite32(u32 mem, u32 value) {
354 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
356 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
357 if ((mem & 0xffff) < 0x400)
358 psxHu32ref(mem) = SWAPu32(value);
360 psxHwWrite32(mem, value);
362 p = (char *)(psxMemWLUT[t]);
365 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
366 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
368 psxCpu->Clear(mem, 1);
371 if (mem != 0xfffe0130) {
374 psxCpu->Clear(mem, 1);
378 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
384 case 0x800: case 0x804:
385 if (writeok == 0) break;
387 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
388 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
389 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
391 case 0x00: case 0x1e988:
392 if (writeok == 1) break;
394 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
395 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
396 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
400 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
409 void *psxMemPointer(u32 mem) {
414 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
415 if ((mem & 0xffff) < 0x400)
416 return (void *)&psxH[mem];
420 p = (char *)(psxMemWLUT[t]);
422 return (void *)(p + (mem & 0xffff));