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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 P |
33 | |
34 | #ifndef MAP_ANONYMOUS | |
35 | #define MAP_ANONYMOUS MAP_ANON | |
36 | #endif | |
37 | ||
87e5b45f | 38 | void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed, |
39 | enum psxMapTag tag); | |
40 | void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag); | |
41 | ||
42 | void *psxMap(unsigned long addr, size_t size, int is_fixed, | |
43 | enum psxMapTag tag) | |
44 | { | |
45 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; | |
5644b26c | 46 | int try_ = 0; |
b0dd9956 | 47 | unsigned long mask; |
87e5b45f | 48 | void *req, *ret; |
49 | ||
b0dd9956 | 50 | retry: |
51 | if (psxMapHook != NULL) { | |
85f23982 | 52 | ret = psxMapHook(addr, size, 0, tag); |
53 | if (ret == NULL) | |
54 | return NULL; | |
55 | } | |
56 | else { | |
57 | /* avoid MAP_FIXED, it overrides existing mappings.. */ | |
58 | /* if (is_fixed) | |
59 | flags |= MAP_FIXED; */ | |
60 | ||
61 | req = (void *)addr; | |
62 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); | |
63 | if (ret == MAP_FAILED) | |
64 | return NULL; | |
b0dd9956 | 65 | } |
87e5b45f | 66 | |
b0dd9956 | 67 | if (addr != 0 && ret != (void *)addr) { |
68 | SysMessage("psxMap: warning: wanted to map @%08x, got %p\n", | |
69 | addr, ret); | |
70 | ||
0069615f | 71 | if (is_fixed) { |
72 | psxUnmap(ret, size, tag); | |
73 | return NULL; | |
74 | } | |
75 | ||
5644b26c | 76 | if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2) |
b0dd9956 | 77 | { |
78 | psxUnmap(ret, size, tag); | |
79 | ||
80 | // try to use similarly aligned memory instead | |
81 | // (recompiler needs this) | |
5644b26c | 82 | mask = try_ ? 0xffff : 0xffffff; |
83 | addr = ((unsigned long)ret + mask) & ~mask; | |
84 | try_++; | |
b0dd9956 | 85 | goto retry; |
86 | } | |
87 | } | |
87e5b45f | 88 | |
89 | return ret; | |
90 | } | |
91 | ||
92 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) | |
93 | { | |
94 | if (psxUnmapHook != NULL) { | |
95 | psxUnmapHook(ptr, size, tag); | |
96 | return; | |
97 | } | |
98 | ||
88901dd2 | 99 | if (ptr) |
100 | munmap(ptr, size); | |
87e5b45f | 101 | } |
102 | ||
ef79bbde P |
103 | s8 *psxM = NULL; // Kernel & User Memory (2 Meg) |
104 | s8 *psxP = NULL; // Parallel Port (64K) | |
105 | s8 *psxR = NULL; // BIOS ROM (512K) | |
106 | s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K) | |
107 | ||
108 | u8 **psxMemWLUT = NULL; | |
109 | u8 **psxMemRLUT = NULL; | |
110 | ||
111 | /* Playstation Memory Map (from Playstation doc by Joshua Walker) | |
112 | 0x0000_0000-0x0000_ffff Kernel (64K) | |
113 | 0x0001_0000-0x001f_ffff User Memory (1.9 Meg) | |
114 | ||
115 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
116 | ||
117 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
118 | ||
119 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
120 | ||
121 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
122 | ||
123 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
124 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
125 | ||
126 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
127 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
128 | */ | |
129 | ||
130 | int psxMemInit() { | |
131 | int i; | |
132 | ||
133 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
134 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
135 | memset(psxMemRLUT, 0, 0x10000 * sizeof(void *)); | |
136 | memset(psxMemWLUT, 0, 0x10000 * sizeof(void *)); | |
137 | ||
87e5b45f | 138 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); |
a4874585 | 139 | if (psxM == NULL) |
f23d3386 | 140 | psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM); |
87e5b45f | 141 | if (psxM == NULL) { |
a327ad27 | 142 | SysMessage(_("mapping main RAM failed")); |
143 | return -1; | |
144 | } | |
ef79bbde P |
145 | |
146 | psxP = &psxM[0x200000]; | |
6d760c92 | 147 | psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER); |
87e5b45f | 148 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); |
ef79bbde P |
149 | |
150 | if (psxMemRLUT == NULL || psxMemWLUT == NULL || | |
6d760c92 | 151 | psxR == NULL || psxP == NULL || psxH == NULL) { |
ef79bbde | 152 | SysMessage(_("Error allocating memory!")); |
88901dd2 | 153 | psxMemShutdown(); |
ef79bbde P |
154 | return -1; |
155 | } | |
156 | ||
157 | // MemR | |
158 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
159 | ||
160 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
161 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
162 | ||
163 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
164 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
165 | ||
166 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
167 | ||
168 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
169 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
170 | ||
171 | // MemW | |
172 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
173 | ||
174 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
175 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
176 | ||
fa18abb2 | 177 | // Don't allow writes to PIO Expansion region (psxP) to take effect. |
178 | // NOTE: Not sure if this is needed to fix any games but seems wise, | |
179 | // seeing as some games do read from PIO as part of copy-protection | |
180 | // check. (See fix in psxMemReset() regarding psxP region reads). | |
181 | psxMemWLUT[0x1f00] = NULL; | |
ef79bbde P |
182 | psxMemWLUT[0x1f80] = (u8 *)psxH; |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | void psxMemReset() { | |
188 | FILE *f = NULL; | |
189 | char bios[1024]; | |
190 | ||
191 | memset(psxM, 0, 0x00200000); | |
23643ee7 | 192 | memset(psxP, 0xff, 0x00010000); |
ef79bbde P |
193 | |
194 | if (strcmp(Config.Bios, "HLE") != 0) { | |
195 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
196 | f = fopen(bios, "rb"); | |
197 | ||
198 | if (f == NULL) { | |
199 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
200 | memset(psxR, 0, 0x80000); | |
201 | Config.HLE = TRUE; | |
202 | } else { | |
203 | fread(psxR, 1, 0x80000, f); | |
204 | fclose(f); | |
205 | Config.HLE = FALSE; | |
206 | } | |
207 | } else Config.HLE = TRUE; | |
208 | } | |
209 | ||
210 | void psxMemShutdown() { | |
88901dd2 | 211 | psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL; |
212 | psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL; | |
213 | psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL; | |
ef79bbde | 214 | |
88901dd2 | 215 | free(psxMemRLUT); psxMemRLUT = NULL; |
216 | free(psxMemWLUT); psxMemWLUT = NULL; | |
ef79bbde P |
217 | } |
218 | ||
219 | static int writeok = 1; | |
220 | ||
221 | u8 psxMemRead8(u32 mem) { | |
222 | char *p; | |
223 | u32 t; | |
224 | ||
225 | t = mem >> 16; | |
9dd7d179 | 226 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
227 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
228 | return psxHu8(mem); |
229 | else | |
230 | return psxHwRead8(mem); | |
231 | } else { | |
232 | p = (char *)(psxMemRLUT[t]); | |
233 | if (p != NULL) { | |
234 | if (Config.Debug) | |
235 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
236 | return *(u8 *)(p + (mem & 0xffff)); | |
237 | } else { | |
238 | #ifdef PSXMEM_LOG | |
239 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
240 | #endif | |
943a507a | 241 | return 0xFF; |
ef79bbde P |
242 | } |
243 | } | |
244 | } | |
245 | ||
246 | u16 psxMemRead16(u32 mem) { | |
247 | char *p; | |
248 | u32 t; | |
249 | ||
250 | t = mem >> 16; | |
9dd7d179 | 251 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
252 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
253 | return psxHu16(mem); |
254 | else | |
255 | return psxHwRead16(mem); | |
256 | } else { | |
257 | p = (char *)(psxMemRLUT[t]); | |
258 | if (p != NULL) { | |
259 | if (Config.Debug) | |
260 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
261 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
262 | } else { | |
263 | #ifdef PSXMEM_LOG | |
264 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
265 | #endif | |
943a507a | 266 | return 0xFFFF; |
ef79bbde P |
267 | } |
268 | } | |
269 | } | |
270 | ||
271 | u32 psxMemRead32(u32 mem) { | |
272 | char *p; | |
273 | u32 t; | |
274 | ||
275 | t = mem >> 16; | |
9dd7d179 | 276 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
277 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
278 | return psxHu32(mem); |
279 | else | |
280 | return psxHwRead32(mem); | |
281 | } else { | |
282 | p = (char *)(psxMemRLUT[t]); | |
283 | if (p != NULL) { | |
284 | if (Config.Debug) | |
285 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
286 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
287 | } else { | |
288 | #ifdef PSXMEM_LOG | |
289 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } | |
290 | #endif | |
943a507a | 291 | return 0xFFFFFFFF; |
ef79bbde P |
292 | } |
293 | } | |
294 | } | |
295 | ||
296 | void psxMemWrite8(u32 mem, u8 value) { | |
297 | char *p; | |
298 | u32 t; | |
299 | ||
300 | t = mem >> 16; | |
9dd7d179 | 301 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
302 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
303 | psxHu8(mem) = value; |
304 | else | |
305 | psxHwWrite8(mem, value); | |
306 | } else { | |
307 | p = (char *)(psxMemWLUT[t]); | |
308 | if (p != NULL) { | |
309 | if (Config.Debug) | |
310 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
311 | *(u8 *)(p + (mem & 0xffff)) = value; | |
41e82ad4 | 312 | #ifndef DRC_DISABLE |
ef79bbde P |
313 | psxCpu->Clear((mem & (~3)), 1); |
314 | #endif | |
315 | } else { | |
316 | #ifdef PSXMEM_LOG | |
317 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
318 | #endif | |
319 | } | |
320 | } | |
321 | } | |
322 | ||
323 | void psxMemWrite16(u32 mem, u16 value) { | |
324 | char *p; | |
325 | u32 t; | |
326 | ||
327 | t = mem >> 16; | |
9dd7d179 | 328 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
329 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
330 | psxHu16ref(mem) = SWAPu16(value); |
331 | else | |
332 | psxHwWrite16(mem, value); | |
333 | } else { | |
334 | p = (char *)(psxMemWLUT[t]); | |
335 | if (p != NULL) { | |
336 | if (Config.Debug) | |
337 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
338 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
41e82ad4 | 339 | #ifndef DRC_DISABLE |
3e31e934 | 340 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
341 | #endif |
342 | } else { | |
343 | #ifdef PSXMEM_LOG | |
344 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
345 | #endif | |
346 | } | |
347 | } | |
348 | } | |
349 | ||
350 | void psxMemWrite32(u32 mem, u32 value) { | |
351 | char *p; | |
352 | u32 t; | |
353 | ||
354 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); | |
355 | t = mem >> 16; | |
9dd7d179 | 356 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
357 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
358 | psxHu32ref(mem) = SWAPu32(value); |
359 | else | |
360 | psxHwWrite32(mem, value); | |
361 | } else { | |
362 | p = (char *)(psxMemWLUT[t]); | |
363 | if (p != NULL) { | |
364 | if (Config.Debug) | |
365 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
366 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
41e82ad4 | 367 | #ifndef DRC_DISABLE |
ef79bbde P |
368 | psxCpu->Clear(mem, 1); |
369 | #endif | |
370 | } else { | |
371 | if (mem != 0xfffe0130) { | |
41e82ad4 | 372 | #ifndef DRC_DISABLE |
ef79bbde P |
373 | if (!writeok) |
374 | psxCpu->Clear(mem, 1); | |
375 | #endif | |
376 | ||
377 | #ifdef PSXMEM_LOG | |
378 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } | |
379 | #endif | |
380 | } else { | |
381 | int i; | |
382 | ||
383 | switch (value) { | |
384 | case 0x800: case 0x804: | |
385 | if (writeok == 0) break; | |
386 | writeok = 0; | |
387 | memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *)); | |
388 | memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *)); | |
389 | memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *)); | |
7bbabe80 | 390 | /* Required for icache interpreter otherwise Armored Core won't boot on icache interpreter */ |
391 | psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_ISOLATED, NULL); | |
ef79bbde P |
392 | break; |
393 | case 0x00: case 0x1e988: | |
394 | if (writeok == 1) break; | |
395 | writeok = 1; | |
396 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; | |
397 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
398 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
7bbabe80 | 399 | /* Dynarecs might take this opportunity to flush their code cache */ |
400 | psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL); | |
ef79bbde P |
401 | break; |
402 | default: | |
403 | #ifdef PSXMEM_LOG | |
404 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); | |
405 | #endif | |
406 | break; | |
407 | } | |
408 | } | |
409 | } | |
410 | } | |
411 | } | |
412 | ||
413 | void *psxMemPointer(u32 mem) { | |
414 | char *p; | |
415 | u32 t; | |
416 | ||
417 | t = mem >> 16; | |
9dd7d179 | 418 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
419 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
420 | return (void *)&psxH[mem]; |
421 | else | |
422 | return NULL; | |
423 | } else { | |
424 | p = (char *)(psxMemWLUT[t]); | |
425 | if (p != NULL) { | |
426 | return (void *)(p + (mem & 0xffff)); | |
427 | } | |
428 | return NULL; | |
429 | } | |
430 | } |