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ef79bbde P |
1 | /*************************************************************************** |
2 | * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team * | |
3 | * * | |
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. * | |
8 | * * | |
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. * | |
13 | * * | |
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 | ***************************************************************************/ | |
19 | ||
20 | /* | |
21 | * PSX memory functions. | |
22 | */ | |
23 | ||
24 | // TODO: Implement caches & cycle penalty. | |
25 | ||
26 | #include "psxmem.h" | |
27 | #include "r3000a.h" | |
28 | #include "psxhw.h" | |
fc8145b7 | 29 | #include "debug.h" |
ef79bbde P |
30 | #include <sys/mman.h> |
31 | ||
32 | #ifndef MAP_ANONYMOUS | |
33 | #define MAP_ANONYMOUS MAP_ANON | |
34 | #endif | |
35 | ||
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) | |
40 | ||
41 | u8 **psxMemWLUT = NULL; | |
42 | u8 **psxMemRLUT = NULL; | |
43 | ||
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) | |
47 | ||
48 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
49 | ||
50 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
51 | ||
52 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
53 | ||
54 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
55 | ||
56 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
57 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
58 | ||
59 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
60 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
61 | */ | |
62 | ||
63 | int psxMemInit() { | |
64 | int i; | |
65 | ||
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 *)); | |
70 | ||
ffb0b9e0 | 71 | psxM = mmap((void *)0x80000000, 0x00210000, |
6e1a0c4d | 72 | PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0); |
a327ad27 | 73 | #ifndef RAM_FIXED |
74 | if (psxM == MAP_FAILED) | |
75 | psxM = mmap((void *)0x70000000, 0x00210000, | |
76 | PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0); | |
77 | #endif | |
78 | if (psxM == MAP_FAILED) { | |
79 | SysMessage(_("mapping main RAM failed")); | |
80 | return -1; | |
81 | } | |
ef79bbde P |
82 | |
83 | psxP = &psxM[0x200000]; | |
ffb0b9e0 | 84 | psxH = mmap((void *)0x1f800000, 0x00010000, |
6e1a0c4d | 85 | PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0); |
ef79bbde | 86 | |
6e1a0c4d | 87 | psxR = mmap((void *)0x1fc00000, 0x80000, |
a06c1d6e | 88 | PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
ef79bbde P |
89 | |
90 | if (psxMemRLUT == NULL || psxMemWLUT == NULL || | |
a327ad27 | 91 | psxR == MAP_FAILED || |
ffb0b9e0 | 92 | psxP == NULL || psxH != (void *)0x1f800000) { |
ef79bbde P |
93 | SysMessage(_("Error allocating memory!")); |
94 | return -1; | |
95 | } | |
96 | ||
97 | // MemR | |
98 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
99 | ||
100 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
101 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
102 | ||
103 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
104 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
105 | ||
106 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
107 | ||
108 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
109 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
110 | ||
111 | // MemW | |
112 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
113 | ||
114 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
115 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
116 | ||
117 | psxMemWLUT[0x1f00] = (u8 *)psxP; | |
118 | psxMemWLUT[0x1f80] = (u8 *)psxH; | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | void psxMemReset() { | |
124 | FILE *f = NULL; | |
125 | char bios[1024]; | |
126 | ||
127 | memset(psxM, 0, 0x00200000); | |
128 | memset(psxP, 0, 0x00010000); | |
129 | ||
130 | if (strcmp(Config.Bios, "HLE") != 0) { | |
131 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
132 | f = fopen(bios, "rb"); | |
133 | ||
134 | if (f == NULL) { | |
135 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
136 | memset(psxR, 0, 0x80000); | |
137 | Config.HLE = TRUE; | |
138 | } else { | |
139 | fread(psxR, 1, 0x80000, f); | |
140 | fclose(f); | |
141 | Config.HLE = FALSE; | |
142 | } | |
143 | } else Config.HLE = TRUE; | |
144 | } | |
145 | ||
146 | void psxMemShutdown() { | |
6e1a0c4d | 147 | munmap(psxM, 0x00210000); |
148 | munmap(psxH, 0x1f800000); | |
a06c1d6e | 149 | munmap(psxR, 0x80000); |
ef79bbde | 150 | |
ef79bbde P |
151 | free(psxMemRLUT); |
152 | free(psxMemWLUT); | |
153 | } | |
154 | ||
155 | static int writeok = 1; | |
156 | ||
157 | u8 psxMemRead8(u32 mem) { | |
158 | char *p; | |
159 | u32 t; | |
160 | ||
161 | t = mem >> 16; | |
162 | if (t == 0x1f80) { | |
163 | if (mem < 0x1f801000) | |
164 | return psxHu8(mem); | |
165 | else | |
166 | return psxHwRead8(mem); | |
167 | } else { | |
168 | p = (char *)(psxMemRLUT[t]); | |
169 | if (p != NULL) { | |
170 | if (Config.Debug) | |
171 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
172 | return *(u8 *)(p + (mem & 0xffff)); | |
173 | } else { | |
174 | #ifdef PSXMEM_LOG | |
175 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
176 | #endif | |
177 | return 0; | |
178 | } | |
179 | } | |
180 | } | |
181 | ||
182 | u16 psxMemRead16(u32 mem) { | |
183 | char *p; | |
184 | u32 t; | |
185 | ||
186 | t = mem >> 16; | |
187 | if (t == 0x1f80) { | |
188 | if (mem < 0x1f801000) | |
189 | return psxHu16(mem); | |
190 | else | |
191 | return psxHwRead16(mem); | |
192 | } else { | |
193 | p = (char *)(psxMemRLUT[t]); | |
194 | if (p != NULL) { | |
195 | if (Config.Debug) | |
196 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
197 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
198 | } else { | |
199 | #ifdef PSXMEM_LOG | |
200 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
201 | #endif | |
202 | return 0; | |
203 | } | |
204 | } | |
205 | } | |
206 | ||
207 | u32 psxMemRead32(u32 mem) { | |
208 | char *p; | |
209 | u32 t; | |
210 | ||
211 | t = mem >> 16; | |
212 | if (t == 0x1f80) { | |
213 | if (mem < 0x1f801000) | |
214 | return psxHu32(mem); | |
215 | else | |
216 | return psxHwRead32(mem); | |
217 | } else { | |
218 | p = (char *)(psxMemRLUT[t]); | |
219 | if (p != NULL) { | |
220 | if (Config.Debug) | |
221 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
222 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
223 | } else { | |
224 | #ifdef PSXMEM_LOG | |
225 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } | |
226 | #endif | |
227 | return 0; | |
228 | } | |
229 | } | |
230 | } | |
231 | ||
232 | void psxMemWrite8(u32 mem, u8 value) { | |
233 | char *p; | |
234 | u32 t; | |
235 | ||
236 | t = mem >> 16; | |
237 | if (t == 0x1f80) { | |
238 | if (mem < 0x1f801000) | |
239 | psxHu8(mem) = value; | |
240 | else | |
241 | psxHwWrite8(mem, value); | |
242 | } else { | |
243 | p = (char *)(psxMemWLUT[t]); | |
244 | if (p != NULL) { | |
245 | if (Config.Debug) | |
246 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
247 | *(u8 *)(p + (mem & 0xffff)) = value; | |
248 | #ifdef PSXREC | |
249 | psxCpu->Clear((mem & (~3)), 1); | |
250 | #endif | |
251 | } else { | |
252 | #ifdef PSXMEM_LOG | |
253 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
254 | #endif | |
255 | } | |
256 | } | |
257 | } | |
258 | ||
259 | void psxMemWrite16(u32 mem, u16 value) { | |
260 | char *p; | |
261 | u32 t; | |
262 | ||
263 | t = mem >> 16; | |
264 | if (t == 0x1f80) { | |
265 | if (mem < 0x1f801000) | |
266 | psxHu16ref(mem) = SWAPu16(value); | |
267 | else | |
268 | psxHwWrite16(mem, value); | |
269 | } else { | |
270 | p = (char *)(psxMemWLUT[t]); | |
271 | if (p != NULL) { | |
272 | if (Config.Debug) | |
273 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
274 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
275 | #ifdef PSXREC | |
3e31e934 | 276 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
277 | #endif |
278 | } else { | |
279 | #ifdef PSXMEM_LOG | |
280 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
281 | #endif | |
282 | } | |
283 | } | |
284 | } | |
285 | ||
286 | void psxMemWrite32(u32 mem, u32 value) { | |
287 | char *p; | |
288 | u32 t; | |
289 | ||
290 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); | |
291 | t = mem >> 16; | |
292 | if (t == 0x1f80) { | |
293 | if (mem < 0x1f801000) | |
294 | psxHu32ref(mem) = SWAPu32(value); | |
295 | else | |
296 | psxHwWrite32(mem, value); | |
297 | } else { | |
298 | p = (char *)(psxMemWLUT[t]); | |
299 | if (p != NULL) { | |
300 | if (Config.Debug) | |
301 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
302 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
303 | #ifdef PSXREC | |
304 | psxCpu->Clear(mem, 1); | |
305 | #endif | |
306 | } else { | |
307 | if (mem != 0xfffe0130) { | |
308 | #ifdef PSXREC | |
309 | if (!writeok) | |
310 | psxCpu->Clear(mem, 1); | |
311 | #endif | |
312 | ||
313 | #ifdef PSXMEM_LOG | |
314 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } | |
315 | #endif | |
316 | } else { | |
317 | int i; | |
318 | ||
319 | switch (value) { | |
320 | case 0x800: case 0x804: | |
321 | if (writeok == 0) break; | |
322 | writeok = 0; | |
323 | memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *)); | |
324 | memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *)); | |
325 | memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *)); | |
326 | break; | |
327 | case 0x00: case 0x1e988: | |
328 | if (writeok == 1) break; | |
329 | writeok = 1; | |
330 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; | |
331 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
332 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
333 | break; | |
334 | default: | |
335 | #ifdef PSXMEM_LOG | |
336 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); | |
337 | #endif | |
338 | break; | |
339 | } | |
340 | } | |
341 | } | |
342 | } | |
343 | } | |
344 | ||
345 | void *psxMemPointer(u32 mem) { | |
346 | char *p; | |
347 | u32 t; | |
348 | ||
349 | t = mem >> 16; | |
350 | if (t == 0x1f80) { | |
351 | if (mem < 0x1f801000) | |
352 | return (void *)&psxH[mem]; | |
353 | else | |
354 | return NULL; | |
355 | } else { | |
356 | p = (char *)(psxMemWLUT[t]); | |
357 | if (p != NULL) { | |
358 | return (void *)(p + (mem & 0xffff)); | |
359 | } | |
360 | return NULL; | |
361 | } | |
362 | } |