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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 | ||
87e5b45f | 44 | void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed, |
45 | enum psxMapTag tag); | |
46 | void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag); | |
47 | ||
48 | void *psxMap(unsigned long addr, size_t size, int is_fixed, | |
49 | enum psxMapTag tag) | |
50 | { | |
a62012a7 | 51 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
5644b26c | 52 | int try_ = 0; |
b0dd9956 | 53 | unsigned long mask; |
87e5b45f | 54 | void *req, *ret; |
55 | ||
b0dd9956 | 56 | retry: |
57 | if (psxMapHook != NULL) { | |
85f23982 | 58 | ret = psxMapHook(addr, size, 0, tag); |
59 | if (ret == NULL) | |
b012a437 | 60 | return MAP_FAILED; |
85f23982 | 61 | } |
62 | else { | |
63 | /* avoid MAP_FIXED, it overrides existing mappings.. */ | |
64 | /* if (is_fixed) | |
65 | flags |= MAP_FIXED; */ | |
66 | ||
2d724e28 | 67 | req = (void *)(uintptr_t)addr; |
85f23982 | 68 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); |
69 | if (ret == MAP_FAILED) | |
b012a437 | 70 | return ret; |
b0dd9956 | 71 | } |
87e5b45f | 72 | |
2d724e28 | 73 | if (addr != 0 && ret != (void *)(uintptr_t)addr) { |
b0dd9956 | 74 | SysMessage("psxMap: warning: wanted to map @%08x, got %p\n", |
75 | addr, ret); | |
76 | ||
0069615f | 77 | if (is_fixed) { |
78 | psxUnmap(ret, size, tag); | |
b012a437 | 79 | return MAP_FAILED; |
0069615f | 80 | } |
81 | ||
2d724e28 | 82 | if (((addr ^ (unsigned long)(uintptr_t)ret) & ~0xff000000l) && try_ < 2) |
b0dd9956 | 83 | { |
84 | psxUnmap(ret, size, tag); | |
85 | ||
86 | // try to use similarly aligned memory instead | |
87 | // (recompiler needs this) | |
5644b26c | 88 | mask = try_ ? 0xffff : 0xffffff; |
2d724e28 | 89 | addr = ((uintptr_t)ret + mask) & ~mask; |
5644b26c | 90 | try_++; |
b0dd9956 | 91 | goto retry; |
92 | } | |
93 | } | |
87e5b45f | 94 | |
95 | return ret; | |
96 | } | |
97 | ||
98 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) | |
99 | { | |
100 | if (psxUnmapHook != NULL) { | |
101 | psxUnmapHook(ptr, size, tag); | |
102 | return; | |
103 | } | |
104 | ||
88901dd2 | 105 | if (ptr) |
106 | munmap(ptr, size); | |
87e5b45f | 107 | } |
108 | ||
ef79bbde P |
109 | s8 *psxM = NULL; // Kernel & User Memory (2 Meg) |
110 | s8 *psxP = NULL; // Parallel Port (64K) | |
111 | s8 *psxR = NULL; // BIOS ROM (512K) | |
112 | s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K) | |
113 | ||
114 | u8 **psxMemWLUT = NULL; | |
115 | u8 **psxMemRLUT = NULL; | |
116 | ||
117 | /* Playstation Memory Map (from Playstation doc by Joshua Walker) | |
118 | 0x0000_0000-0x0000_ffff Kernel (64K) | |
119 | 0x0001_0000-0x001f_ffff User Memory (1.9 Meg) | |
120 | ||
121 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
122 | ||
123 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
124 | ||
125 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
126 | ||
127 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
128 | ||
129 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
130 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
131 | ||
132 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
133 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
134 | */ | |
135 | ||
479d58cf PC |
136 | static int psxMemInitMap(void) |
137 | { | |
a62012a7 | 138 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); |
b012a437 | 139 | if (psxM == MAP_FAILED) |
f23d3386 | 140 | psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM); |
b012a437 | 141 | if (psxM == MAP_FAILED) { |
a327ad27 | 142 | SysMessage(_("mapping main RAM failed")); |
5b568098 | 143 | psxM = NULL; |
a327ad27 | 144 | return -1; |
145 | } | |
ef79bbde | 146 | psxP = &psxM[0x200000]; |
5b568098 | 147 | |
a62012a7 | 148 | psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER); |
5b568098 | 149 | if (psxH == MAP_FAILED) { |
150 | SysMessage(_("Error allocating memory!")); | |
151 | psxMemShutdown(); | |
152 | return -1; | |
153 | } | |
ef79bbde | 154 | |
5b568098 | 155 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); |
156 | if (psxR == MAP_FAILED) { | |
ef79bbde | 157 | SysMessage(_("Error allocating memory!")); |
88901dd2 | 158 | psxMemShutdown(); |
ef79bbde P |
159 | return -1; |
160 | } | |
161 | ||
479d58cf PC |
162 | return 0; |
163 | } | |
164 | ||
165 | static void psxMemFreeMap(void) | |
166 | { | |
5b568098 | 167 | if (psxM) psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); |
168 | if (psxH) psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); | |
169 | if (psxR) psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); | |
170 | psxM = psxH = psxR = NULL; | |
171 | psxP = NULL; | |
479d58cf PC |
172 | } |
173 | ||
174 | int psxMemInit(void) | |
175 | { | |
176 | unsigned int i; | |
177 | int ret; | |
178 | ||
640c8536 | 179 | if (LIGHTREC_CUSTOM_MAP) |
479d58cf PC |
180 | ret = lightrec_init_mmap(); |
181 | else | |
182 | ret = psxMemInitMap(); | |
183 | if (ret) { | |
184 | SysMessage(_("Error allocating memory!")); | |
185 | psxMemShutdown(); | |
186 | return -1; | |
187 | } | |
188 | ||
b012a437 PC |
189 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); |
190 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
191 | ||
192 | if (psxMemRLUT == NULL || psxMemWLUT == NULL) { | |
193 | SysMessage(_("Error allocating memory!")); | |
194 | psxMemShutdown(); | |
195 | return -1; | |
196 | } | |
197 | ||
5b568098 | 198 | memset(psxMemRLUT, (uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *)); |
199 | memset(psxMemWLUT, (uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *)); | |
b012a437 | 200 | |
ef79bbde P |
201 | // MemR |
202 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
203 | ||
204 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
205 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
206 | ||
207 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
208 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
209 | ||
210 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
211 | ||
212 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
213 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
214 | ||
215 | // MemW | |
216 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
217 | ||
218 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
219 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
220 | ||
6e4e5efb | 221 | // Don't allow writes to PIO Expansion region (psxP) to take effect. |
222 | // NOTE: Not sure if this is needed to fix any games but seems wise, | |
223 | // seeing as some games do read from PIO as part of copy-protection | |
224 | // check. (See fix in psxMemReset() regarding psxP region reads). | |
b012a437 | 225 | psxMemWLUT[0x1f00] = INVALID_PTR; |
ef79bbde P |
226 | psxMemWLUT[0x1f80] = (u8 *)psxH; |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | void psxMemReset() { | |
232 | FILE *f = NULL; | |
233 | char bios[1024]; | |
234 | ||
235 | memset(psxM, 0, 0x00200000); | |
23643ee7 | 236 | memset(psxP, 0xff, 0x00010000); |
ef79bbde | 237 | |
9361a5aa EC |
238 | Config.HLE = TRUE; |
239 | ||
ef79bbde P |
240 | if (strcmp(Config.Bios, "HLE") != 0) { |
241 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
226a5691 | 242 | f = fopen(bios, "rb"); |
ef79bbde P |
243 | |
244 | if (f == NULL) { | |
245 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
246 | memset(psxR, 0, 0x80000); | |
ef79bbde | 247 | } else { |
9361a5aa EC |
248 | if (fread(psxR, 1, 0x80000, f) == 0x80000) { |
249 | Config.HLE = FALSE; | |
250 | } else { | |
251 | SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios); | |
252 | } | |
ef79bbde | 253 | fclose(f); |
ef79bbde | 254 | } |
9361a5aa | 255 | } |
ef79bbde P |
256 | } |
257 | ||
258 | void psxMemShutdown() { | |
640c8536 | 259 | if (LIGHTREC_CUSTOM_MAP) |
479d58cf PC |
260 | lightrec_free_mmap(); |
261 | else | |
262 | psxMemFreeMap(); | |
ef79bbde | 263 | |
88901dd2 | 264 | free(psxMemRLUT); psxMemRLUT = NULL; |
265 | free(psxMemWLUT); psxMemWLUT = NULL; | |
ef79bbde P |
266 | } |
267 | ||
5b568098 | 268 | static int writeok = 1; |
269 | ||
ef79bbde P |
270 | u8 psxMemRead8(u32 mem) { |
271 | char *p; | |
272 | u32 t; | |
273 | ||
274 | t = mem >> 16; | |
9dd7d179 | 275 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
276 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
277 | return psxHu8(mem); |
278 | else | |
279 | return psxHwRead8(mem); | |
280 | } else { | |
281 | p = (char *)(psxMemRLUT[t]); | |
b012a437 | 282 | if (p != INVALID_PTR) { |
ef79bbde P |
283 | if (Config.Debug) |
284 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
285 | return *(u8 *)(p + (mem & 0xffff)); | |
286 | } else { | |
287 | #ifdef PSXMEM_LOG | |
288 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
289 | #endif | |
e86be808 | 290 | return 0xFF; |
ef79bbde P |
291 | } |
292 | } | |
293 | } | |
294 | ||
295 | u16 psxMemRead16(u32 mem) { | |
296 | char *p; | |
297 | u32 t; | |
298 | ||
299 | t = mem >> 16; | |
9dd7d179 | 300 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
301 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
302 | return psxHu16(mem); |
303 | else | |
304 | return psxHwRead16(mem); | |
305 | } else { | |
306 | p = (char *)(psxMemRLUT[t]); | |
b012a437 | 307 | if (p != INVALID_PTR) { |
ef79bbde P |
308 | if (Config.Debug) |
309 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
310 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
311 | } else { | |
312 | #ifdef PSXMEM_LOG | |
313 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
314 | #endif | |
e86be808 | 315 | return 0xFFFF; |
ef79bbde P |
316 | } |
317 | } | |
318 | } | |
319 | ||
320 | u32 psxMemRead32(u32 mem) { | |
321 | char *p; | |
322 | u32 t; | |
323 | ||
324 | t = mem >> 16; | |
9dd7d179 | 325 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
326 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
327 | return psxHu32(mem); |
328 | else | |
329 | return psxHwRead32(mem); | |
330 | } else { | |
331 | p = (char *)(psxMemRLUT[t]); | |
b012a437 | 332 | if (p != INVALID_PTR) { |
ef79bbde P |
333 | if (Config.Debug) |
334 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
335 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
336 | } else { | |
337 | #ifdef PSXMEM_LOG | |
338 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } | |
339 | #endif | |
e86be808 | 340 | return 0xFFFFFFFF; |
ef79bbde P |
341 | } |
342 | } | |
343 | } | |
344 | ||
345 | void psxMemWrite8(u32 mem, u8 value) { | |
346 | char *p; | |
347 | u32 t; | |
348 | ||
349 | t = mem >> 16; | |
9dd7d179 | 350 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
351 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
352 | psxHu8(mem) = value; |
353 | else | |
354 | psxHwWrite8(mem, value); | |
355 | } else { | |
356 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 357 | if (p != INVALID_PTR) { |
ef79bbde P |
358 | if (Config.Debug) |
359 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
360 | *(u8 *)(p + (mem & 0xffff)) = value; | |
630b122b | 361 | #ifndef DRC_DISABLE |
ef79bbde P |
362 | psxCpu->Clear((mem & (~3)), 1); |
363 | #endif | |
364 | } else { | |
365 | #ifdef PSXMEM_LOG | |
366 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
367 | #endif | |
368 | } | |
369 | } | |
370 | } | |
371 | ||
372 | void psxMemWrite16(u32 mem, u16 value) { | |
373 | char *p; | |
374 | u32 t; | |
375 | ||
376 | t = mem >> 16; | |
9dd7d179 | 377 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
378 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
379 | psxHu16ref(mem) = SWAPu16(value); |
380 | else | |
381 | psxHwWrite16(mem, value); | |
382 | } else { | |
383 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 384 | if (p != INVALID_PTR) { |
ef79bbde P |
385 | if (Config.Debug) |
386 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
387 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
630b122b | 388 | #ifndef DRC_DISABLE |
3e31e934 | 389 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
390 | #endif |
391 | } else { | |
392 | #ifdef PSXMEM_LOG | |
393 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
394 | #endif | |
395 | } | |
396 | } | |
397 | } | |
398 | ||
399 | void psxMemWrite32(u32 mem, u32 value) { | |
400 | char *p; | |
401 | u32 t; | |
630b122b | 402 | |
ef79bbde P |
403 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); |
404 | t = mem >> 16; | |
9dd7d179 | 405 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
630b122b | 406 | if ((mem & 0xffff) < 0x400) |
ef79bbde P |
407 | psxHu32ref(mem) = SWAPu32(value); |
408 | else | |
409 | psxHwWrite32(mem, value); | |
410 | } else { | |
411 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 412 | if (p != INVALID_PTR) { |
ef79bbde P |
413 | if (Config.Debug) |
414 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
415 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
630b122b | 416 | #ifndef DRC_DISABLE |
ef79bbde P |
417 | psxCpu->Clear(mem, 1); |
418 | #endif | |
419 | } else { | |
420 | if (mem != 0xfffe0130) { | |
630b122b | 421 | #ifndef DRC_DISABLE |
ef79bbde P |
422 | if (!writeok) |
423 | psxCpu->Clear(mem, 1); | |
424 | #endif | |
425 | ||
426 | #ifdef PSXMEM_LOG | |
427 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } | |
428 | #endif | |
429 | } else { | |
430 | int i; | |
431 | ||
432 | switch (value) { | |
433 | case 0x800: case 0x804: | |
630b122b | 434 | if (writeok == 0) break; |
435 | writeok = 0; | |
5b568098 | 436 | memset(psxMemWLUT + 0x0000, (uintptr_t)INVALID_PTR, 0x80 * sizeof(void *)); |
437 | memset(psxMemWLUT + 0x8000, (uintptr_t)INVALID_PTR, 0x80 * sizeof(void *)); | |
438 | memset(psxMemWLUT + 0xa000, (uintptr_t)INVALID_PTR, 0x80 * sizeof(void *)); | |
630b122b | 439 | /* Required for icache interpreter otherwise Armored Core won't boot on icache interpreter */ |
7a811716 | 440 | psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_ISOLATED, NULL); |
ef79bbde P |
441 | break; |
442 | case 0x00: case 0x1e988: | |
630b122b | 443 | if (writeok == 1) break; |
444 | writeok = 1; | |
ef79bbde P |
445 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; |
446 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
447 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
7a811716 | 448 | /* Dynarecs might take this opportunity to flush their code cache */ |
449 | psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL); | |
ef79bbde P |
450 | break; |
451 | default: | |
452 | #ifdef PSXMEM_LOG | |
453 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); | |
454 | #endif | |
455 | break; | |
456 | } | |
457 | } | |
458 | } | |
459 | } | |
460 | } | |
461 | ||
462 | void *psxMemPointer(u32 mem) { | |
463 | char *p; | |
464 | u32 t; | |
465 | ||
466 | t = mem >> 16; | |
9dd7d179 | 467 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
468 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
469 | return (void *)&psxH[mem]; |
470 | else | |
471 | return NULL; | |
472 | } else { | |
473 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 474 | if (p != INVALID_PTR) { |
ef79bbde P |
475 | return (void *)(p + (mem & 0xffff)); |
476 | } | |
477 | return NULL; | |
478 | } | |
479 | } |