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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" |
ce0e7ac9 | 31 | |
32 | #include "memmap.h" | |
ef79bbde | 33 | |
226a5691 | 34 | #ifdef USE_LIBRETRO_VFS |
35 | #include <streams/file_stream_transforms.h> | |
36 | #endif | |
37 | ||
ef79bbde P |
38 | #ifndef MAP_ANONYMOUS |
39 | #define MAP_ANONYMOUS MAP_ANON | |
40 | #endif | |
41 | ||
87e5b45f | 42 | void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed, |
43 | enum psxMapTag tag); | |
44 | void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag); | |
45 | ||
46 | void *psxMap(unsigned long addr, size_t size, int is_fixed, | |
47 | enum psxMapTag tag) | |
48 | { | |
a62012a7 | 49 | #ifdef LIGHTREC |
f12a6e13 ZC |
50 | #ifdef MAP_FIXED_NOREPLACE |
51 | int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE; | |
52 | #else | |
38c19eff | 53 | int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED; |
f12a6e13 | 54 | #endif |
a62012a7 T |
55 | #else |
56 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; | |
57 | #endif | |
58 | ||
5644b26c | 59 | int try_ = 0; |
b0dd9956 | 60 | unsigned long mask; |
87e5b45f | 61 | void *req, *ret; |
62 | ||
b0dd9956 | 63 | retry: |
64 | if (psxMapHook != NULL) { | |
85f23982 | 65 | ret = psxMapHook(addr, size, 0, tag); |
66 | if (ret == NULL) | |
67 | return NULL; | |
68 | } | |
69 | else { | |
70 | /* avoid MAP_FIXED, it overrides existing mappings.. */ | |
71 | /* if (is_fixed) | |
72 | flags |= MAP_FIXED; */ | |
73 | ||
74 | req = (void *)addr; | |
75 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); | |
76 | if (ret == MAP_FAILED) | |
77 | return NULL; | |
b0dd9956 | 78 | } |
87e5b45f | 79 | |
b0dd9956 | 80 | if (addr != 0 && ret != (void *)addr) { |
81 | SysMessage("psxMap: warning: wanted to map @%08x, got %p\n", | |
82 | addr, ret); | |
83 | ||
0069615f | 84 | if (is_fixed) { |
85 | psxUnmap(ret, size, tag); | |
86 | return NULL; | |
87 | } | |
88 | ||
5644b26c | 89 | if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2) |
b0dd9956 | 90 | { |
91 | psxUnmap(ret, size, tag); | |
92 | ||
93 | // try to use similarly aligned memory instead | |
94 | // (recompiler needs this) | |
5644b26c | 95 | mask = try_ ? 0xffff : 0xffffff; |
96 | addr = ((unsigned long)ret + mask) & ~mask; | |
97 | try_++; | |
b0dd9956 | 98 | goto retry; |
99 | } | |
100 | } | |
87e5b45f | 101 | |
102 | return ret; | |
103 | } | |
104 | ||
105 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) | |
106 | { | |
107 | if (psxUnmapHook != NULL) { | |
108 | psxUnmapHook(ptr, size, tag); | |
109 | return; | |
110 | } | |
111 | ||
88901dd2 | 112 | if (ptr) |
113 | munmap(ptr, size); | |
87e5b45f | 114 | } |
115 | ||
ef79bbde P |
116 | s8 *psxM = NULL; // Kernel & User Memory (2 Meg) |
117 | s8 *psxP = NULL; // Parallel Port (64K) | |
118 | s8 *psxR = NULL; // BIOS ROM (512K) | |
119 | s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K) | |
120 | ||
121 | u8 **psxMemWLUT = NULL; | |
122 | u8 **psxMemRLUT = NULL; | |
123 | ||
124 | /* Playstation Memory Map (from Playstation doc by Joshua Walker) | |
125 | 0x0000_0000-0x0000_ffff Kernel (64K) | |
126 | 0x0001_0000-0x001f_ffff User Memory (1.9 Meg) | |
127 | ||
128 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
129 | ||
130 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
131 | ||
132 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
133 | ||
134 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
135 | ||
136 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
137 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
138 | ||
139 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
140 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
141 | */ | |
142 | ||
143 | int psxMemInit() { | |
144 | int i; | |
145 | ||
146 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
147 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
148 | memset(psxMemRLUT, 0, 0x10000 * sizeof(void *)); | |
149 | memset(psxMemWLUT, 0, 0x10000 * sizeof(void *)); | |
150 | ||
a62012a7 | 151 | #ifdef LIGHTREC |
38c19eff | 152 | psxM = psxMap(0x30000000, 0x00210000, 1, MAP_TAG_RAM); |
f12a6e13 ZC |
153 | if (psxM == NULL) |
154 | psxM = psxMap(0x70000000, 0x00210000, 1, MAP_TAG_RAM); | |
155 | ||
a62012a7 T |
156 | #else |
157 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); | |
158 | #endif | |
a327ad27 | 159 | #ifndef RAM_FIXED |
a4874585 | 160 | if (psxM == NULL) |
f23d3386 | 161 | psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM); |
a327ad27 | 162 | #endif |
87e5b45f | 163 | if (psxM == NULL) { |
a327ad27 | 164 | SysMessage(_("mapping main RAM failed")); |
165 | return -1; | |
166 | } | |
ef79bbde P |
167 | |
168 | psxP = &psxM[0x200000]; | |
a62012a7 | 169 | #ifdef LIGHTREC |
38c19eff | 170 | psxH = psxMap(0x4f800000, 0x10000, 0, MAP_TAG_OTHER); |
f12a6e13 ZC |
171 | if (psxH == NULL) |
172 | psxH = psxMap(0x8f800000, 0x10000, 0, MAP_TAG_OTHER); | |
173 | ||
38c19eff | 174 | psxR = psxMap(0x4fc00000, 0x80000, 0, MAP_TAG_OTHER); |
f12a6e13 ZC |
175 | if (psxR == NULL) |
176 | psxR = psxMap(0x8fc00000, 0x80000, 0, MAP_TAG_OTHER); | |
a62012a7 T |
177 | #else |
178 | psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER); | |
179 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); | |
180 | #endif | |
ef79bbde P |
181 | |
182 | if (psxMemRLUT == NULL || psxMemWLUT == NULL || | |
6d760c92 | 183 | psxR == NULL || psxP == NULL || psxH == NULL) { |
ef79bbde | 184 | SysMessage(_("Error allocating memory!")); |
88901dd2 | 185 | psxMemShutdown(); |
ef79bbde P |
186 | return -1; |
187 | } | |
188 | ||
189 | // MemR | |
190 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
191 | ||
192 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
193 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
194 | ||
195 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
196 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
197 | ||
198 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
199 | ||
200 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
201 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
202 | ||
203 | // MemW | |
204 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
205 | ||
206 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
207 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
208 | ||
209 | psxMemWLUT[0x1f00] = (u8 *)psxP; | |
210 | psxMemWLUT[0x1f80] = (u8 *)psxH; | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | void psxMemReset() { | |
216 | FILE *f = NULL; | |
217 | char bios[1024]; | |
218 | ||
219 | memset(psxM, 0, 0x00200000); | |
23643ee7 | 220 | memset(psxP, 0xff, 0x00010000); |
ef79bbde P |
221 | |
222 | if (strcmp(Config.Bios, "HLE") != 0) { | |
223 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
226a5691 | 224 | f = fopen(bios, "rb"); |
ef79bbde P |
225 | |
226 | if (f == NULL) { | |
227 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
228 | memset(psxR, 0, 0x80000); | |
229 | Config.HLE = TRUE; | |
230 | } else { | |
231 | fread(psxR, 1, 0x80000, f); | |
232 | fclose(f); | |
233 | Config.HLE = FALSE; | |
234 | } | |
235 | } else Config.HLE = TRUE; | |
236 | } | |
237 | ||
238 | void psxMemShutdown() { | |
88901dd2 | 239 | psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL; |
240 | psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL; | |
241 | psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL; | |
ef79bbde | 242 | |
88901dd2 | 243 | free(psxMemRLUT); psxMemRLUT = NULL; |
244 | free(psxMemWLUT); psxMemWLUT = NULL; | |
ef79bbde P |
245 | } |
246 | ||
247 | static int writeok = 1; | |
248 | ||
249 | u8 psxMemRead8(u32 mem) { | |
250 | char *p; | |
251 | u32 t; | |
252 | ||
253 | t = mem >> 16; | |
9dd7d179 | 254 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
255 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
256 | return psxHu8(mem); |
257 | else | |
258 | return psxHwRead8(mem); | |
259 | } else { | |
260 | p = (char *)(psxMemRLUT[t]); | |
261 | if (p != NULL) { | |
262 | if (Config.Debug) | |
263 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
264 | return *(u8 *)(p + (mem & 0xffff)); | |
265 | } else { | |
266 | #ifdef PSXMEM_LOG | |
267 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
268 | #endif | |
269 | return 0; | |
270 | } | |
271 | } | |
272 | } | |
273 | ||
274 | u16 psxMemRead16(u32 mem) { | |
275 | char *p; | |
276 | u32 t; | |
277 | ||
278 | t = mem >> 16; | |
9dd7d179 | 279 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
280 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
281 | return psxHu16(mem); |
282 | else | |
283 | return psxHwRead16(mem); | |
284 | } else { | |
285 | p = (char *)(psxMemRLUT[t]); | |
286 | if (p != NULL) { | |
287 | if (Config.Debug) | |
288 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
289 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
290 | } else { | |
291 | #ifdef PSXMEM_LOG | |
292 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
293 | #endif | |
294 | return 0; | |
295 | } | |
296 | } | |
297 | } | |
298 | ||
299 | u32 psxMemRead32(u32 mem) { | |
300 | char *p; | |
301 | u32 t; | |
302 | ||
303 | t = mem >> 16; | |
9dd7d179 | 304 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
305 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
306 | return psxHu32(mem); |
307 | else | |
308 | return psxHwRead32(mem); | |
309 | } else { | |
310 | p = (char *)(psxMemRLUT[t]); | |
311 | if (p != NULL) { | |
312 | if (Config.Debug) | |
313 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
314 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
315 | } else { | |
316 | #ifdef PSXMEM_LOG | |
317 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } | |
318 | #endif | |
319 | return 0; | |
320 | } | |
321 | } | |
322 | } | |
323 | ||
324 | void psxMemWrite8(u32 mem, u8 value) { | |
325 | char *p; | |
326 | u32 t; | |
327 | ||
328 | t = mem >> 16; | |
9dd7d179 | 329 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
330 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
331 | psxHu8(mem) = value; |
332 | else | |
333 | psxHwWrite8(mem, value); | |
334 | } else { | |
335 | p = (char *)(psxMemWLUT[t]); | |
336 | if (p != NULL) { | |
337 | if (Config.Debug) | |
338 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
339 | *(u8 *)(p + (mem & 0xffff)) = value; | |
340 | #ifdef PSXREC | |
341 | psxCpu->Clear((mem & (~3)), 1); | |
342 | #endif | |
343 | } else { | |
344 | #ifdef PSXMEM_LOG | |
345 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
346 | #endif | |
347 | } | |
348 | } | |
349 | } | |
350 | ||
351 | void psxMemWrite16(u32 mem, u16 value) { | |
352 | char *p; | |
353 | u32 t; | |
354 | ||
355 | t = mem >> 16; | |
9dd7d179 | 356 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
357 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
358 | psxHu16ref(mem) = SWAPu16(value); |
359 | else | |
360 | psxHwWrite16(mem, value); | |
361 | } else { | |
362 | p = (char *)(psxMemWLUT[t]); | |
363 | if (p != NULL) { | |
364 | if (Config.Debug) | |
365 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
366 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
367 | #ifdef PSXREC | |
3e31e934 | 368 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
369 | #endif |
370 | } else { | |
371 | #ifdef PSXMEM_LOG | |
372 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
373 | #endif | |
374 | } | |
375 | } | |
376 | } | |
377 | ||
378 | void psxMemWrite32(u32 mem, u32 value) { | |
379 | char *p; | |
380 | u32 t; | |
381 | ||
382 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); | |
383 | t = mem >> 16; | |
9dd7d179 | 384 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
385 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
386 | psxHu32ref(mem) = SWAPu32(value); |
387 | else | |
388 | psxHwWrite32(mem, value); | |
389 | } else { | |
390 | p = (char *)(psxMemWLUT[t]); | |
391 | if (p != NULL) { | |
392 | if (Config.Debug) | |
393 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
394 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
395 | #ifdef PSXREC | |
396 | psxCpu->Clear(mem, 1); | |
397 | #endif | |
398 | } else { | |
399 | if (mem != 0xfffe0130) { | |
400 | #ifdef PSXREC | |
401 | if (!writeok) | |
402 | psxCpu->Clear(mem, 1); | |
403 | #endif | |
404 | ||
405 | #ifdef PSXMEM_LOG | |
406 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } | |
407 | #endif | |
408 | } else { | |
409 | int i; | |
410 | ||
411 | switch (value) { | |
412 | case 0x800: case 0x804: | |
413 | if (writeok == 0) break; | |
414 | writeok = 0; | |
415 | memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *)); | |
416 | memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *)); | |
417 | memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *)); | |
418 | break; | |
419 | case 0x00: case 0x1e988: | |
420 | if (writeok == 1) break; | |
421 | writeok = 1; | |
422 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; | |
423 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
424 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
425 | break; | |
426 | default: | |
427 | #ifdef PSXMEM_LOG | |
428 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); | |
429 | #endif | |
430 | break; | |
431 | } | |
432 | } | |
433 | } | |
434 | } | |
435 | } | |
436 | ||
437 | void *psxMemPointer(u32 mem) { | |
438 | char *p; | |
439 | u32 t; | |
440 | ||
441 | t = mem >> 16; | |
9dd7d179 | 442 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
443 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
444 | return (void *)&psxH[mem]; |
445 | else | |
446 | return NULL; | |
447 | } else { | |
448 | p = (char *)(psxMemWLUT[t]); | |
449 | if (p != NULL) { | |
450 | return (void *)(p + (mem & 0xffff)); | |
451 | } | |
452 | return NULL; | |
453 | } | |
454 | } |