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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" | |
5b568098 | 30 | //#include "debug.h" |
31 | #define DebugCheckBP(...) | |
ce0e7ac9 | 32 | |
479d58cf | 33 | #include "lightrec/mem.h" |
ce0e7ac9 | 34 | #include "memmap.h" |
ef79bbde | 35 | |
226a5691 | 36 | #ifdef USE_LIBRETRO_VFS |
37 | #include <streams/file_stream_transforms.h> | |
38 | #endif | |
39 | ||
ef79bbde P |
40 | #ifndef MAP_ANONYMOUS |
41 | #define MAP_ANONYMOUS MAP_ANON | |
42 | #endif | |
43 | ||
08621fe5 PC |
44 | static void * psxMapDefault(unsigned long addr, size_t size, |
45 | int is_fixed, enum psxMapTag tag) | |
46 | { | |
94f0c7c5 | 47 | #if !P_HAVE_MMAP |
71012b7b PC |
48 | void *ptr; |
49 | ||
50 | ptr = malloc(size); | |
51 | return ptr ? ptr : MAP_FAILED; | |
52 | #else | |
08621fe5 PC |
53 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
54 | ||
55 | return mmap((void *)(uintptr_t)addr, size, | |
56 | PROT_READ | PROT_WRITE, flags, -1, 0); | |
71012b7b | 57 | #endif |
08621fe5 PC |
58 | } |
59 | ||
60 | static void psxUnmapDefault(void *ptr, size_t size, enum psxMapTag tag) | |
61 | { | |
94f0c7c5 | 62 | #if !P_HAVE_MMAP |
71012b7b PC |
63 | free(ptr); |
64 | #else | |
08621fe5 | 65 | munmap(ptr, size); |
71012b7b | 66 | #endif |
08621fe5 PC |
67 | } |
68 | ||
87e5b45f | 69 | void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed, |
08621fe5 PC |
70 | enum psxMapTag tag) = psxMapDefault; |
71 | void (*psxUnmapHook)(void *ptr, size_t size, | |
72 | enum psxMapTag tag) = psxUnmapDefault; | |
87e5b45f | 73 | |
74 | void *psxMap(unsigned long addr, size_t size, int is_fixed, | |
75 | enum psxMapTag tag) | |
76 | { | |
5644b26c | 77 | int try_ = 0; |
b0dd9956 | 78 | unsigned long mask; |
08621fe5 | 79 | void *ret; |
87e5b45f | 80 | |
b0dd9956 | 81 | retry: |
08621fe5 PC |
82 | ret = psxMapHook(addr, size, 0, tag); |
83 | if (ret == NULL) | |
84 | return MAP_FAILED; | |
87e5b45f | 85 | |
2d724e28 | 86 | if (addr != 0 && ret != (void *)(uintptr_t)addr) { |
b0dd9956 | 87 | SysMessage("psxMap: warning: wanted to map @%08x, got %p\n", |
88 | addr, ret); | |
89 | ||
0069615f | 90 | if (is_fixed) { |
91 | psxUnmap(ret, size, tag); | |
b012a437 | 92 | return MAP_FAILED; |
0069615f | 93 | } |
94 | ||
2d724e28 | 95 | if (((addr ^ (unsigned long)(uintptr_t)ret) & ~0xff000000l) && try_ < 2) |
b0dd9956 | 96 | { |
97 | psxUnmap(ret, size, tag); | |
98 | ||
99 | // try to use similarly aligned memory instead | |
100 | // (recompiler needs this) | |
5644b26c | 101 | mask = try_ ? 0xffff : 0xffffff; |
2d724e28 | 102 | addr = ((uintptr_t)ret + mask) & ~mask; |
5644b26c | 103 | try_++; |
b0dd9956 | 104 | goto retry; |
105 | } | |
106 | } | |
87e5b45f | 107 | |
108 | return ret; | |
109 | } | |
110 | ||
111 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) | |
112 | { | |
08621fe5 | 113 | psxUnmapHook(ptr, size, tag); |
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 | ||
479d58cf PC |
143 | static int psxMemInitMap(void) |
144 | { | |
a62012a7 | 145 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); |
b012a437 | 146 | if (psxM == MAP_FAILED) |
f23d3386 | 147 | psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM); |
b012a437 | 148 | if (psxM == MAP_FAILED) { |
a327ad27 | 149 | SysMessage(_("mapping main RAM failed")); |
5b568098 | 150 | psxM = NULL; |
a327ad27 | 151 | return -1; |
152 | } | |
ef79bbde | 153 | psxP = &psxM[0x200000]; |
5b568098 | 154 | |
a62012a7 | 155 | psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER); |
5b568098 | 156 | if (psxH == MAP_FAILED) { |
157 | SysMessage(_("Error allocating memory!")); | |
158 | psxMemShutdown(); | |
159 | return -1; | |
160 | } | |
ef79bbde | 161 | |
5b568098 | 162 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); |
163 | if (psxR == MAP_FAILED) { | |
ef79bbde | 164 | SysMessage(_("Error allocating memory!")); |
88901dd2 | 165 | psxMemShutdown(); |
ef79bbde P |
166 | return -1; |
167 | } | |
168 | ||
479d58cf PC |
169 | return 0; |
170 | } | |
171 | ||
172 | static void psxMemFreeMap(void) | |
173 | { | |
5b568098 | 174 | if (psxM) psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); |
175 | if (psxH) psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); | |
176 | if (psxR) psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); | |
177 | psxM = psxH = psxR = NULL; | |
178 | psxP = NULL; | |
479d58cf PC |
179 | } |
180 | ||
181 | int psxMemInit(void) | |
182 | { | |
183 | unsigned int i; | |
184 | int ret; | |
185 | ||
640c8536 | 186 | if (LIGHTREC_CUSTOM_MAP) |
479d58cf PC |
187 | ret = lightrec_init_mmap(); |
188 | else | |
189 | ret = psxMemInitMap(); | |
190 | if (ret) { | |
191 | SysMessage(_("Error allocating memory!")); | |
192 | psxMemShutdown(); | |
193 | return -1; | |
194 | } | |
195 | ||
b012a437 PC |
196 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); |
197 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
198 | ||
199 | if (psxMemRLUT == NULL || psxMemWLUT == NULL) { | |
200 | SysMessage(_("Error allocating memory!")); | |
201 | psxMemShutdown(); | |
202 | return -1; | |
203 | } | |
204 | ||
c6b7420b | 205 | memset(psxMemRLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *)); |
206 | memset(psxMemWLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *)); | |
b012a437 | 207 | |
ef79bbde P |
208 | // MemR |
209 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
210 | ||
211 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
212 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
213 | ||
214 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
215 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
216 | ||
217 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
218 | ||
219 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
220 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
221 | ||
222 | // MemW | |
223 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
224 | ||
225 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
226 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
227 | ||
6e4e5efb | 228 | // Don't allow writes to PIO Expansion region (psxP) to take effect. |
229 | // NOTE: Not sure if this is needed to fix any games but seems wise, | |
230 | // seeing as some games do read from PIO as part of copy-protection | |
231 | // check. (See fix in psxMemReset() regarding psxP region reads). | |
b012a437 | 232 | psxMemWLUT[0x1f00] = INVALID_PTR; |
ef79bbde P |
233 | psxMemWLUT[0x1f80] = (u8 *)psxH; |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | void psxMemReset() { | |
239 | FILE *f = NULL; | |
240 | char bios[1024]; | |
241 | ||
242 | memset(psxM, 0, 0x00200000); | |
23643ee7 | 243 | memset(psxP, 0xff, 0x00010000); |
ef79bbde | 244 | |
9361a5aa EC |
245 | Config.HLE = TRUE; |
246 | ||
ef79bbde P |
247 | if (strcmp(Config.Bios, "HLE") != 0) { |
248 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
226a5691 | 249 | f = fopen(bios, "rb"); |
ef79bbde P |
250 | |
251 | if (f == NULL) { | |
252 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
253 | memset(psxR, 0, 0x80000); | |
ef79bbde | 254 | } else { |
9361a5aa EC |
255 | if (fread(psxR, 1, 0x80000, f) == 0x80000) { |
256 | Config.HLE = FALSE; | |
257 | } else { | |
258 | SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios); | |
259 | } | |
ef79bbde | 260 | fclose(f); |
ef79bbde | 261 | } |
9361a5aa | 262 | } |
ef79bbde P |
263 | } |
264 | ||
265 | void psxMemShutdown() { | |
640c8536 | 266 | if (LIGHTREC_CUSTOM_MAP) |
479d58cf PC |
267 | lightrec_free_mmap(); |
268 | else | |
269 | psxMemFreeMap(); | |
ef79bbde | 270 | |
88901dd2 | 271 | free(psxMemRLUT); psxMemRLUT = NULL; |
272 | free(psxMemWLUT); psxMemWLUT = NULL; | |
ef79bbde P |
273 | } |
274 | ||
c6b7420b | 275 | void psxMemOnIsolate(int enable) |
276 | { | |
277 | if (enable) { | |
278 | memset(psxMemWLUT + 0x0000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *)); | |
279 | memset(psxMemWLUT + 0x8000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *)); | |
280 | //memset(psxMemWLUT + 0xa000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *)); | |
281 | } else { | |
282 | int i; | |
283 | for (i = 0; i < 0x80; i++) | |
284 | psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; | |
285 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
286 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
287 | } | |
288 | psxCpu->Notify(enable ? R3000ACPU_NOTIFY_CACHE_ISOLATED | |
289 | : R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL); | |
290 | } | |
5b568098 | 291 | |
ef79bbde P |
292 | u8 psxMemRead8(u32 mem) { |
293 | char *p; | |
294 | u32 t; | |
295 | ||
296 | t = mem >> 16; | |
9dd7d179 | 297 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
298 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
299 | return psxHu8(mem); |
300 | else | |
301 | return psxHwRead8(mem); | |
302 | } else { | |
303 | p = (char *)(psxMemRLUT[t]); | |
b012a437 | 304 | if (p != INVALID_PTR) { |
ef79bbde P |
305 | if (Config.Debug) |
306 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
307 | return *(u8 *)(p + (mem & 0xffff)); | |
308 | } else { | |
309 | #ifdef PSXMEM_LOG | |
310 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
311 | #endif | |
e86be808 | 312 | return 0xFF; |
ef79bbde P |
313 | } |
314 | } | |
315 | } | |
316 | ||
317 | u16 psxMemRead16(u32 mem) { | |
318 | char *p; | |
319 | u32 t; | |
320 | ||
321 | t = mem >> 16; | |
9dd7d179 | 322 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
323 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
324 | return psxHu16(mem); |
325 | else | |
326 | return psxHwRead16(mem); | |
327 | } else { | |
328 | p = (char *)(psxMemRLUT[t]); | |
b012a437 | 329 | if (p != INVALID_PTR) { |
ef79bbde P |
330 | if (Config.Debug) |
331 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
332 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
333 | } else { | |
334 | #ifdef PSXMEM_LOG | |
335 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
336 | #endif | |
e86be808 | 337 | return 0xFFFF; |
ef79bbde P |
338 | } |
339 | } | |
340 | } | |
341 | ||
342 | u32 psxMemRead32(u32 mem) { | |
343 | char *p; | |
344 | u32 t; | |
345 | ||
346 | t = mem >> 16; | |
9dd7d179 | 347 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
348 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
349 | return psxHu32(mem); |
350 | else | |
351 | return psxHwRead32(mem); | |
352 | } else { | |
353 | p = (char *)(psxMemRLUT[t]); | |
b012a437 | 354 | if (p != INVALID_PTR) { |
ef79bbde P |
355 | if (Config.Debug) |
356 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
357 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
358 | } else { | |
c6b7420b | 359 | if (mem == 0xfffe0130) |
360 | return psxRegs.biuReg; | |
ef79bbde | 361 | #ifdef PSXMEM_LOG |
c6b7420b | 362 | PSXMEM_LOG("err lw %8.8lx\n", mem); |
ef79bbde | 363 | #endif |
e86be808 | 364 | return 0xFFFFFFFF; |
ef79bbde P |
365 | } |
366 | } | |
367 | } | |
368 | ||
369 | void psxMemWrite8(u32 mem, u8 value) { | |
370 | char *p; | |
371 | u32 t; | |
372 | ||
373 | t = mem >> 16; | |
9dd7d179 | 374 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
375 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
376 | psxHu8(mem) = value; |
377 | else | |
378 | psxHwWrite8(mem, value); | |
379 | } else { | |
380 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 381 | if (p != INVALID_PTR) { |
ef79bbde P |
382 | if (Config.Debug) |
383 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
384 | *(u8 *)(p + (mem & 0xffff)) = value; | |
630b122b | 385 | #ifndef DRC_DISABLE |
ef79bbde P |
386 | psxCpu->Clear((mem & (~3)), 1); |
387 | #endif | |
388 | } else { | |
389 | #ifdef PSXMEM_LOG | |
390 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
391 | #endif | |
392 | } | |
393 | } | |
394 | } | |
395 | ||
396 | void psxMemWrite16(u32 mem, u16 value) { | |
397 | char *p; | |
398 | u32 t; | |
399 | ||
400 | t = mem >> 16; | |
9dd7d179 | 401 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
402 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
403 | psxHu16ref(mem) = SWAPu16(value); |
404 | else | |
405 | psxHwWrite16(mem, value); | |
406 | } else { | |
407 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 408 | if (p != INVALID_PTR) { |
ef79bbde P |
409 | if (Config.Debug) |
410 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
411 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
630b122b | 412 | #ifndef DRC_DISABLE |
3e31e934 | 413 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
414 | #endif |
415 | } else { | |
416 | #ifdef PSXMEM_LOG | |
417 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
418 | #endif | |
419 | } | |
420 | } | |
421 | } | |
422 | ||
423 | void psxMemWrite32(u32 mem, u32 value) { | |
424 | char *p; | |
425 | u32 t; | |
630b122b | 426 | |
ef79bbde P |
427 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); |
428 | t = mem >> 16; | |
9dd7d179 | 429 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
630b122b | 430 | if ((mem & 0xffff) < 0x400) |
ef79bbde P |
431 | psxHu32ref(mem) = SWAPu32(value); |
432 | else | |
433 | psxHwWrite32(mem, value); | |
434 | } else { | |
435 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 436 | if (p != INVALID_PTR) { |
ef79bbde P |
437 | if (Config.Debug) |
438 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
439 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
630b122b | 440 | #ifndef DRC_DISABLE |
ef79bbde P |
441 | psxCpu->Clear(mem, 1); |
442 | #endif | |
443 | } else { | |
c6b7420b | 444 | if (mem == 0xfffe0130) { |
445 | psxRegs.biuReg = value; | |
446 | return; | |
447 | } | |
ef79bbde | 448 | #ifdef PSXMEM_LOG |
c6b7420b | 449 | PSXMEM_LOG("err sw %8.8lx\n", mem); |
ef79bbde | 450 | #endif |
ef79bbde P |
451 | } |
452 | } | |
453 | } | |
454 | ||
455 | void *psxMemPointer(u32 mem) { | |
456 | char *p; | |
457 | u32 t; | |
458 | ||
459 | t = mem >> 16; | |
9dd7d179 | 460 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
461 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
462 | return (void *)&psxH[mem]; |
463 | else | |
464 | return NULL; | |
465 | } else { | |
466 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 467 | if (p != INVALID_PTR) { |
ef79bbde P |
468 | return (void *)(p + (mem & 0xffff)); |
469 | } | |
470 | return NULL; | |
471 | } | |
472 | } |