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"
35 #define MAP_ANONYMOUS MAP_ANON
38 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
40 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
42 void *psxMap(unsigned long addr, size_t size, int is_fixed,
46 #ifdef MAP_FIXED_NOREPLACE
47 int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE;
49 int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED;
52 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
60 if (psxMapHook != NULL) {
61 ret = psxMapHook(addr, size, 0, tag);
66 /* avoid MAP_FIXED, it overrides existing mappings.. */
68 flags |= MAP_FIXED; */
71 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
72 if (ret == MAP_FAILED)
76 if (addr != 0 && ret != (void *)addr) {
77 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
81 psxUnmap(ret, size, tag);
85 if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2)
87 psxUnmap(ret, size, tag);
89 // try to use similarly aligned memory instead
90 // (recompiler needs this)
91 mask = try_ ? 0xffff : 0xffffff;
92 addr = ((unsigned long)ret + mask) & ~mask;
101 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
103 if (psxUnmapHook != NULL) {
104 psxUnmapHook(ptr, size, tag);
112 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
113 s8 *psxP = NULL; // Parallel Port (64K)
114 s8 *psxR = NULL; // BIOS ROM (512K)
115 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
117 u8 **psxMemWLUT = NULL;
118 u8 **psxMemRLUT = NULL;
120 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
121 0x0000_0000-0x0000_ffff Kernel (64K)
122 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
124 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
126 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
128 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
130 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
132 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
133 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
135 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
136 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
142 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
143 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
144 memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
145 memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
148 psxM = psxMap(0x30000000, 0x00210000, 1, MAP_TAG_RAM);
150 psxM = psxMap(0x70000000, 0x00210000, 1, MAP_TAG_RAM);
153 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
157 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
160 SysMessage(_("mapping main RAM failed"));
164 psxP = &psxM[0x200000];
166 psxH = psxMap(0x4f800000, 0x10000, 0, MAP_TAG_OTHER);
168 psxH = psxMap(0x8f800000, 0x10000, 0, MAP_TAG_OTHER);
170 psxR = psxMap(0x4fc00000, 0x80000, 0, MAP_TAG_OTHER);
172 psxR = psxMap(0x8fc00000, 0x80000, 0, MAP_TAG_OTHER);
174 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
175 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
178 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
179 psxR == NULL || psxP == NULL || psxH == NULL) {
180 SysMessage(_("Error allocating memory!"));
186 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
188 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
189 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
191 psxMemRLUT[0x1f00] = (u8 *)psxP;
192 psxMemRLUT[0x1f80] = (u8 *)psxH;
194 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
196 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
197 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
200 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
202 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
203 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
205 psxMemWLUT[0x1f00] = (u8 *)psxP;
206 psxMemWLUT[0x1f80] = (u8 *)psxH;
215 memset(psxM, 0, 0x00200000);
216 memset(psxP, 0xff, 0x00010000);
218 if (strcmp(Config.Bios, "HLE") != 0) {
219 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
220 f = fopen(bios, "rb");
223 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
224 memset(psxR, 0, 0x80000);
227 fread(psxR, 1, 0x80000, f);
231 } else Config.HLE = TRUE;
234 void psxMemShutdown() {
235 psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
236 psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
237 psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
239 free(psxMemRLUT); psxMemRLUT = NULL;
240 free(psxMemWLUT); psxMemWLUT = NULL;
243 static int writeok = 1;
245 u8 psxMemRead8(u32 mem) {
250 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
251 if ((mem & 0xffff) < 0x400)
254 return psxHwRead8(mem);
256 p = (char *)(psxMemRLUT[t]);
259 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
260 return *(u8 *)(p + (mem & 0xffff));
263 PSXMEM_LOG("err lb %8.8lx\n", mem);
270 u16 psxMemRead16(u32 mem) {
275 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
276 if ((mem & 0xffff) < 0x400)
279 return psxHwRead16(mem);
281 p = (char *)(psxMemRLUT[t]);
284 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
285 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
288 PSXMEM_LOG("err lh %8.8lx\n", mem);
295 u32 psxMemRead32(u32 mem) {
300 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
301 if ((mem & 0xffff) < 0x400)
304 return psxHwRead32(mem);
306 p = (char *)(psxMemRLUT[t]);
309 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
310 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
313 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
320 void psxMemWrite8(u32 mem, u8 value) {
325 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
326 if ((mem & 0xffff) < 0x400)
329 psxHwWrite8(mem, value);
331 p = (char *)(psxMemWLUT[t]);
334 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
335 *(u8 *)(p + (mem & 0xffff)) = value;
337 psxCpu->Clear((mem & (~3)), 1);
341 PSXMEM_LOG("err sb %8.8lx\n", mem);
347 void psxMemWrite16(u32 mem, u16 value) {
352 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
353 if ((mem & 0xffff) < 0x400)
354 psxHu16ref(mem) = SWAPu16(value);
356 psxHwWrite16(mem, value);
358 p = (char *)(psxMemWLUT[t]);
361 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
362 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
364 psxCpu->Clear((mem & (~3)), 1);
368 PSXMEM_LOG("err sh %8.8lx\n", mem);
374 void psxMemWrite32(u32 mem, u32 value) {
378 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
380 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
381 if ((mem & 0xffff) < 0x400)
382 psxHu32ref(mem) = SWAPu32(value);
384 psxHwWrite32(mem, value);
386 p = (char *)(psxMemWLUT[t]);
389 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
390 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
392 psxCpu->Clear(mem, 1);
395 if (mem != 0xfffe0130) {
398 psxCpu->Clear(mem, 1);
402 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
408 case 0x800: case 0x804:
409 if (writeok == 0) break;
411 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
412 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
413 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
415 case 0x00: case 0x1e988:
416 if (writeok == 1) break;
418 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
419 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
420 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
424 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
433 void *psxMemPointer(u32 mem) {
438 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
439 if ((mem & 0xffff) < 0x400)
440 return (void *)&psxH[mem];
444 p = (char *)(psxMemWLUT[t]);
446 return (void *)(p + (mem & 0xffff));