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"
39 #define MAP_ANONYMOUS MAP_ANON
42 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
44 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
46 void *psxMap(unsigned long addr, size_t size, int is_fixed,
49 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
50 int tried_to_align = 0;
55 if (psxMapHook != NULL) {
56 ret = psxMapHook(addr, size, is_fixed, tag);
60 /* avoid MAP_FIXED, it overrides existing mappings.. */
62 flags |= MAP_FIXED; */
65 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
66 if (ret == MAP_FAILED)
70 if (addr != 0 && ret != (void *)addr) {
71 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
75 psxUnmap(ret, size, tag);
79 if (ret != NULL && ((addr ^ (long)ret) & 0x00ffffff)
82 psxUnmap(ret, size, tag);
84 // try to use similarly aligned memory instead
85 // (recompiler needs this)
86 mask = (addr - 1) & ~addr & 0x07ffffff;
87 addr = (unsigned long)(ret + mask) & ~mask;
96 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
98 if (psxUnmapHook != NULL) {
99 psxUnmapHook(ptr, size, tag);
107 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
108 s8 *psxP = NULL; // Parallel Port (64K)
109 s8 *psxR = NULL; // BIOS ROM (512K)
110 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
112 u8 **psxMemWLUT = NULL;
113 u8 **psxMemRLUT = NULL;
115 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
116 0x0000_0000-0x0000_ffff Kernel (64K)
117 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
119 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
121 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
123 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
125 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
127 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
128 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
130 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
131 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
137 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
138 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
139 memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
140 memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
142 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
144 #ifdef __BLACKBERRY_QNX__
146 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
149 psxM = psxMap(0x78000000, 0x00210000, 0, MAP_TAG_RAM);
153 SysMessage(_("mapping main RAM failed"));
157 psxP = &psxM[0x200000];
158 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
159 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
161 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
162 psxR == NULL || psxP == NULL || psxH == NULL) {
163 SysMessage(_("Error allocating memory!"));
169 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
171 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
172 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
174 psxMemRLUT[0x1f00] = (u8 *)psxP;
175 psxMemRLUT[0x1f80] = (u8 *)psxH;
177 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
179 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
180 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
183 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
185 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
186 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
188 psxMemWLUT[0x1f00] = (u8 *)psxP;
189 psxMemWLUT[0x1f80] = (u8 *)psxH;
198 memset(psxM, 0, 0x00200000);
199 memset(psxP, 0, 0x00010000);
201 if (strcmp(Config.Bios, "HLE") != 0) {
202 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
203 f = fopen(bios, "rb");
206 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
207 memset(psxR, 0, 0x80000);
210 fread(psxR, 1, 0x80000, f);
214 } else Config.HLE = TRUE;
217 void psxMemShutdown() {
218 psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
219 psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
220 psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
222 free(psxMemRLUT); psxMemRLUT = NULL;
223 free(psxMemWLUT); psxMemWLUT = NULL;
226 static int writeok = 1;
228 u8 psxMemRead8(u32 mem) {
233 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
234 if ((mem & 0xffff) < 0x400)
237 return psxHwRead8(mem);
239 p = (char *)(psxMemRLUT[t]);
242 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
243 return *(u8 *)(p + (mem & 0xffff));
246 PSXMEM_LOG("err lb %8.8lx\n", mem);
253 u16 psxMemRead16(u32 mem) {
258 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
259 if ((mem & 0xffff) < 0x400)
262 return psxHwRead16(mem);
264 p = (char *)(psxMemRLUT[t]);
267 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
268 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
271 PSXMEM_LOG("err lh %8.8lx\n", mem);
278 u32 psxMemRead32(u32 mem) {
283 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
284 if ((mem & 0xffff) < 0x400)
287 return psxHwRead32(mem);
289 p = (char *)(psxMemRLUT[t]);
292 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
293 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
296 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
303 void psxMemWrite8(u32 mem, u8 value) {
308 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
309 if ((mem & 0xffff) < 0x400)
312 psxHwWrite8(mem, value);
314 p = (char *)(psxMemWLUT[t]);
317 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
318 *(u8 *)(p + (mem & 0xffff)) = value;
320 psxCpu->Clear((mem & (~3)), 1);
324 PSXMEM_LOG("err sb %8.8lx\n", mem);
330 void psxMemWrite16(u32 mem, u16 value) {
335 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
336 if ((mem & 0xffff) < 0x400)
337 psxHu16ref(mem) = SWAPu16(value);
339 psxHwWrite16(mem, value);
341 p = (char *)(psxMemWLUT[t]);
344 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
345 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
347 psxCpu->Clear((mem & (~3)), 1);
351 PSXMEM_LOG("err sh %8.8lx\n", mem);
357 void psxMemWrite32(u32 mem, u32 value) {
361 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
363 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
364 if ((mem & 0xffff) < 0x400)
365 psxHu32ref(mem) = SWAPu32(value);
367 psxHwWrite32(mem, value);
369 p = (char *)(psxMemWLUT[t]);
372 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
373 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
375 psxCpu->Clear(mem, 1);
378 if (mem != 0xfffe0130) {
381 psxCpu->Clear(mem, 1);
385 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
391 case 0x800: case 0x804:
392 if (writeok == 0) break;
394 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
395 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
396 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
398 case 0x00: case 0x1e988:
399 if (writeok == 1) break;
401 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
402 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
403 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
407 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
416 void *psxMemPointer(u32 mem) {
421 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
422 if ((mem & 0xffff) < 0x400)
423 return (void *)&psxH[mem];
427 p = (char *)(psxMemWLUT[t]);
429 return (void *)(p + (mem & 0xffff));