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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" | |
87e5b45f | 27 | #include "psxmem_map.h" |
ef79bbde P |
28 | #include "r3000a.h" |
29 | #include "psxhw.h" | |
fc8145b7 | 30 | #include "debug.h" |
ef79bbde P |
31 | #include <sys/mman.h> |
32 | ||
33 | #ifndef MAP_ANONYMOUS | |
34 | #define MAP_ANONYMOUS MAP_ANON | |
35 | #endif | |
36 | ||
87e5b45f | 37 | void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed, |
38 | enum psxMapTag tag); | |
39 | void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag); | |
40 | ||
41 | void *psxMap(unsigned long addr, size_t size, int is_fixed, | |
42 | enum psxMapTag tag) | |
43 | { | |
44 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; | |
45 | void *req, *ret; | |
46 | ||
47 | if (psxMapHook != NULL) | |
48 | return psxMapHook(addr, size, is_fixed, tag); | |
49 | ||
50 | if (is_fixed) | |
51 | flags |= MAP_FIXED; | |
52 | ||
53 | req = (void *)addr; | |
54 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); | |
55 | if (ret == MAP_FAILED) | |
56 | return NULL; | |
57 | ||
8ad120c9 | 58 | if (req != NULL && ret != req) |
87e5b45f | 59 | SysMessage("psxMap: warning: wanted to map @%p, got %p\n", |
60 | req, ret); | |
61 | ||
62 | return ret; | |
63 | } | |
64 | ||
65 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) | |
66 | { | |
67 | if (psxUnmapHook != NULL) { | |
68 | psxUnmapHook(ptr, size, tag); | |
69 | return; | |
70 | } | |
71 | ||
72 | munmap(ptr, size); | |
73 | } | |
74 | ||
ef79bbde P |
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) | |
79 | ||
80 | u8 **psxMemWLUT = NULL; | |
81 | u8 **psxMemRLUT = NULL; | |
82 | ||
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) | |
86 | ||
87 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
88 | ||
89 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
90 | ||
91 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
92 | ||
93 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
94 | ||
95 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
96 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
97 | ||
98 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
99 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
100 | */ | |
101 | ||
102 | int psxMemInit() { | |
103 | int i; | |
104 | ||
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 *)); | |
109 | ||
87e5b45f | 110 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); |
a327ad27 | 111 | #ifndef RAM_FIXED |
87e5b45f | 112 | if (psxM == NULL) |
113 | psxM = psxMap(0x70000000, 0x00210000, 0, MAP_TAG_RAM); | |
a327ad27 | 114 | #endif |
87e5b45f | 115 | if (psxM == NULL) { |
a327ad27 | 116 | SysMessage(_("mapping main RAM failed")); |
117 | return -1; | |
118 | } | |
ef79bbde P |
119 | |
120 | psxP = &psxM[0x200000]; | |
87e5b45f | 121 | psxH = psxMap(0x1f800000, 0x10000, 1, MAP_TAG_OTHER); |
122 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); | |
ef79bbde P |
123 | |
124 | if (psxMemRLUT == NULL || psxMemWLUT == NULL || | |
87e5b45f | 125 | psxR == NULL || psxP == NULL || psxH != (void *)0x1f800000) { |
ef79bbde P |
126 | SysMessage(_("Error allocating memory!")); |
127 | return -1; | |
128 | } | |
129 | ||
130 | // MemR | |
131 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
132 | ||
133 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
134 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
135 | ||
136 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
137 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
138 | ||
139 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
140 | ||
141 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
142 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
143 | ||
144 | // MemW | |
145 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
146 | ||
147 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
148 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
149 | ||
150 | psxMemWLUT[0x1f00] = (u8 *)psxP; | |
151 | psxMemWLUT[0x1f80] = (u8 *)psxH; | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | void psxMemReset() { | |
157 | FILE *f = NULL; | |
158 | char bios[1024]; | |
159 | ||
160 | memset(psxM, 0, 0x00200000); | |
161 | memset(psxP, 0, 0x00010000); | |
162 | ||
163 | if (strcmp(Config.Bios, "HLE") != 0) { | |
164 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
165 | f = fopen(bios, "rb"); | |
166 | ||
167 | if (f == NULL) { | |
168 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
169 | memset(psxR, 0, 0x80000); | |
170 | Config.HLE = TRUE; | |
171 | } else { | |
172 | fread(psxR, 1, 0x80000, f); | |
173 | fclose(f); | |
174 | Config.HLE = FALSE; | |
175 | } | |
176 | } else Config.HLE = TRUE; | |
177 | } | |
178 | ||
179 | void psxMemShutdown() { | |
87e5b45f | 180 | psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); |
181 | psxUnmap(psxH, 0x1f800000, MAP_TAG_OTHER); | |
182 | psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); | |
ef79bbde | 183 | |
ef79bbde P |
184 | free(psxMemRLUT); |
185 | free(psxMemWLUT); | |
186 | } | |
187 | ||
188 | static int writeok = 1; | |
189 | ||
190 | u8 psxMemRead8(u32 mem) { | |
191 | char *p; | |
192 | u32 t; | |
193 | ||
194 | t = mem >> 16; | |
195 | if (t == 0x1f80) { | |
196 | if (mem < 0x1f801000) | |
197 | return psxHu8(mem); | |
198 | else | |
199 | return psxHwRead8(mem); | |
200 | } else { | |
201 | p = (char *)(psxMemRLUT[t]); | |
202 | if (p != NULL) { | |
203 | if (Config.Debug) | |
204 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
205 | return *(u8 *)(p + (mem & 0xffff)); | |
206 | } else { | |
207 | #ifdef PSXMEM_LOG | |
208 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
209 | #endif | |
210 | return 0; | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
215 | u16 psxMemRead16(u32 mem) { | |
216 | char *p; | |
217 | u32 t; | |
218 | ||
219 | t = mem >> 16; | |
220 | if (t == 0x1f80) { | |
221 | if (mem < 0x1f801000) | |
222 | return psxHu16(mem); | |
223 | else | |
224 | return psxHwRead16(mem); | |
225 | } else { | |
226 | p = (char *)(psxMemRLUT[t]); | |
227 | if (p != NULL) { | |
228 | if (Config.Debug) | |
229 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
230 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
231 | } else { | |
232 | #ifdef PSXMEM_LOG | |
233 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
234 | #endif | |
235 | return 0; | |
236 | } | |
237 | } | |
238 | } | |
239 | ||
240 | u32 psxMemRead32(u32 mem) { | |
241 | char *p; | |
242 | u32 t; | |
243 | ||
244 | t = mem >> 16; | |
245 | if (t == 0x1f80) { | |
246 | if (mem < 0x1f801000) | |
247 | return psxHu32(mem); | |
248 | else | |
249 | return psxHwRead32(mem); | |
250 | } else { | |
251 | p = (char *)(psxMemRLUT[t]); | |
252 | if (p != NULL) { | |
253 | if (Config.Debug) | |
254 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
255 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
256 | } else { | |
257 | #ifdef PSXMEM_LOG | |
258 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } | |
259 | #endif | |
260 | return 0; | |
261 | } | |
262 | } | |
263 | } | |
264 | ||
265 | void psxMemWrite8(u32 mem, u8 value) { | |
266 | char *p; | |
267 | u32 t; | |
268 | ||
269 | t = mem >> 16; | |
270 | if (t == 0x1f80) { | |
271 | if (mem < 0x1f801000) | |
272 | psxHu8(mem) = value; | |
273 | else | |
274 | psxHwWrite8(mem, value); | |
275 | } else { | |
276 | p = (char *)(psxMemWLUT[t]); | |
277 | if (p != NULL) { | |
278 | if (Config.Debug) | |
279 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
280 | *(u8 *)(p + (mem & 0xffff)) = value; | |
281 | #ifdef PSXREC | |
282 | psxCpu->Clear((mem & (~3)), 1); | |
283 | #endif | |
284 | } else { | |
285 | #ifdef PSXMEM_LOG | |
286 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
287 | #endif | |
288 | } | |
289 | } | |
290 | } | |
291 | ||
292 | void psxMemWrite16(u32 mem, u16 value) { | |
293 | char *p; | |
294 | u32 t; | |
295 | ||
296 | t = mem >> 16; | |
297 | if (t == 0x1f80) { | |
298 | if (mem < 0x1f801000) | |
299 | psxHu16ref(mem) = SWAPu16(value); | |
300 | else | |
301 | psxHwWrite16(mem, value); | |
302 | } else { | |
303 | p = (char *)(psxMemWLUT[t]); | |
304 | if (p != NULL) { | |
305 | if (Config.Debug) | |
306 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
307 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
308 | #ifdef PSXREC | |
3e31e934 | 309 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
310 | #endif |
311 | } else { | |
312 | #ifdef PSXMEM_LOG | |
313 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
314 | #endif | |
315 | } | |
316 | } | |
317 | } | |
318 | ||
319 | void psxMemWrite32(u32 mem, u32 value) { | |
320 | char *p; | |
321 | u32 t; | |
322 | ||
323 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); | |
324 | t = mem >> 16; | |
325 | if (t == 0x1f80) { | |
326 | if (mem < 0x1f801000) | |
327 | psxHu32ref(mem) = SWAPu32(value); | |
328 | else | |
329 | psxHwWrite32(mem, value); | |
330 | } else { | |
331 | p = (char *)(psxMemWLUT[t]); | |
332 | if (p != NULL) { | |
333 | if (Config.Debug) | |
334 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
335 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
336 | #ifdef PSXREC | |
337 | psxCpu->Clear(mem, 1); | |
338 | #endif | |
339 | } else { | |
340 | if (mem != 0xfffe0130) { | |
341 | #ifdef PSXREC | |
342 | if (!writeok) | |
343 | psxCpu->Clear(mem, 1); | |
344 | #endif | |
345 | ||
346 | #ifdef PSXMEM_LOG | |
347 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } | |
348 | #endif | |
349 | } else { | |
350 | int i; | |
351 | ||
352 | switch (value) { | |
353 | case 0x800: case 0x804: | |
354 | if (writeok == 0) break; | |
355 | writeok = 0; | |
356 | memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *)); | |
357 | memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *)); | |
358 | memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *)); | |
359 | break; | |
360 | case 0x00: case 0x1e988: | |
361 | if (writeok == 1) break; | |
362 | writeok = 1; | |
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 *)); | |
366 | break; | |
367 | default: | |
368 | #ifdef PSXMEM_LOG | |
369 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); | |
370 | #endif | |
371 | break; | |
372 | } | |
373 | } | |
374 | } | |
375 | } | |
376 | } | |
377 | ||
378 | void *psxMemPointer(u32 mem) { | |
379 | char *p; | |
380 | u32 t; | |
381 | ||
382 | t = mem >> 16; | |
383 | if (t == 0x1f80) { | |
384 | if (mem < 0x1f801000) | |
385 | return (void *)&psxH[mem]; | |
386 | else | |
387 | return NULL; | |
388 | } else { | |
389 | p = (char *)(psxMemWLUT[t]); | |
390 | if (p != NULL) { | |
391 | return (void *)(p + (mem & 0xffff)); | |
392 | } | |
393 | return NULL; | |
394 | } | |
395 | } |