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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; | |
b0dd9956 | 45 | int tried_to_align = 0; |
46 | unsigned long mask; | |
87e5b45f | 47 | void *req, *ret; |
48 | ||
b0dd9956 | 49 | retry: |
50 | if (psxMapHook != NULL) { | |
51 | ret = psxMapHook(addr, size, is_fixed, tag); | |
52 | goto out; | |
53 | } | |
87e5b45f | 54 | |
55 | if (is_fixed) | |
56 | flags |= MAP_FIXED; | |
57 | ||
58 | req = (void *)addr; | |
59 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); | |
60 | if (ret == MAP_FAILED) | |
61 | return NULL; | |
62 | ||
b0dd9956 | 63 | out: |
64 | if (addr != 0 && ret != (void *)addr) { | |
65 | SysMessage("psxMap: warning: wanted to map @%08x, got %p\n", | |
66 | addr, ret); | |
67 | ||
68 | if (ret != NULL && ((addr ^ (long)ret) & 0x00ffffff) | |
69 | && !tried_to_align) | |
70 | { | |
71 | psxUnmap(ret, size, tag); | |
72 | ||
73 | // try to use similarly aligned memory instead | |
74 | // (recompiler needs this) | |
75 | mask = (addr - 1) & ~addr & 0x07ffffff; | |
76 | addr = (unsigned long)(ret + mask) & ~mask; | |
77 | tried_to_align = 1; | |
78 | goto retry; | |
79 | } | |
80 | } | |
87e5b45f | 81 | |
82 | return ret; | |
83 | } | |
84 | ||
85 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) | |
86 | { | |
87 | if (psxUnmapHook != NULL) { | |
88 | psxUnmapHook(ptr, size, tag); | |
89 | return; | |
90 | } | |
91 | ||
92 | munmap(ptr, size); | |
93 | } | |
94 | ||
ef79bbde P |
95 | s8 *psxM = NULL; // Kernel & User Memory (2 Meg) |
96 | s8 *psxP = NULL; // Parallel Port (64K) | |
97 | s8 *psxR = NULL; // BIOS ROM (512K) | |
98 | s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K) | |
99 | ||
100 | u8 **psxMemWLUT = NULL; | |
101 | u8 **psxMemRLUT = NULL; | |
102 | ||
103 | /* Playstation Memory Map (from Playstation doc by Joshua Walker) | |
104 | 0x0000_0000-0x0000_ffff Kernel (64K) | |
105 | 0x0001_0000-0x001f_ffff User Memory (1.9 Meg) | |
106 | ||
107 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
108 | ||
109 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
110 | ||
111 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
112 | ||
113 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
114 | ||
115 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
116 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
117 | ||
118 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
119 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
120 | */ | |
121 | ||
122 | int psxMemInit() { | |
123 | int i; | |
124 | ||
125 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
126 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
127 | memset(psxMemRLUT, 0, 0x10000 * sizeof(void *)); | |
128 | memset(psxMemWLUT, 0, 0x10000 * sizeof(void *)); | |
129 | ||
87e5b45f | 130 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); |
a327ad27 | 131 | #ifndef RAM_FIXED |
87e5b45f | 132 | if (psxM == NULL) |
b0dd9956 | 133 | psxM = psxMap(0x78000000, 0x00210000, 0, MAP_TAG_RAM); |
a327ad27 | 134 | #endif |
87e5b45f | 135 | if (psxM == NULL) { |
a327ad27 | 136 | SysMessage(_("mapping main RAM failed")); |
137 | return -1; | |
138 | } | |
ef79bbde P |
139 | |
140 | psxP = &psxM[0x200000]; | |
87e5b45f | 141 | psxH = psxMap(0x1f800000, 0x10000, 1, MAP_TAG_OTHER); |
142 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); | |
ef79bbde P |
143 | |
144 | if (psxMemRLUT == NULL || psxMemWLUT == NULL || | |
87e5b45f | 145 | psxR == NULL || psxP == NULL || psxH != (void *)0x1f800000) { |
ef79bbde P |
146 | SysMessage(_("Error allocating memory!")); |
147 | return -1; | |
148 | } | |
149 | ||
150 | // MemR | |
151 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
152 | ||
153 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
154 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
155 | ||
156 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
157 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
158 | ||
159 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
160 | ||
161 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
162 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
163 | ||
164 | // MemW | |
165 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
166 | ||
167 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
168 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
169 | ||
170 | psxMemWLUT[0x1f00] = (u8 *)psxP; | |
171 | psxMemWLUT[0x1f80] = (u8 *)psxH; | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | void psxMemReset() { | |
177 | FILE *f = NULL; | |
178 | char bios[1024]; | |
179 | ||
180 | memset(psxM, 0, 0x00200000); | |
181 | memset(psxP, 0, 0x00010000); | |
182 | ||
183 | if (strcmp(Config.Bios, "HLE") != 0) { | |
184 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
185 | f = fopen(bios, "rb"); | |
186 | ||
187 | if (f == NULL) { | |
188 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
189 | memset(psxR, 0, 0x80000); | |
190 | Config.HLE = TRUE; | |
191 | } else { | |
192 | fread(psxR, 1, 0x80000, f); | |
193 | fclose(f); | |
194 | Config.HLE = FALSE; | |
195 | } | |
196 | } else Config.HLE = TRUE; | |
197 | } | |
198 | ||
199 | void psxMemShutdown() { | |
87e5b45f | 200 | psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); |
30773ad7 | 201 | psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); |
87e5b45f | 202 | psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); |
ef79bbde | 203 | |
ef79bbde P |
204 | free(psxMemRLUT); |
205 | free(psxMemWLUT); | |
206 | } | |
207 | ||
208 | static int writeok = 1; | |
209 | ||
210 | u8 psxMemRead8(u32 mem) { | |
211 | char *p; | |
212 | u32 t; | |
213 | ||
214 | t = mem >> 16; | |
9dd7d179 | 215 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
216 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
217 | return psxHu8(mem); |
218 | else | |
219 | return psxHwRead8(mem); | |
220 | } else { | |
221 | p = (char *)(psxMemRLUT[t]); | |
222 | if (p != NULL) { | |
223 | if (Config.Debug) | |
224 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
225 | return *(u8 *)(p + (mem & 0xffff)); | |
226 | } else { | |
227 | #ifdef PSXMEM_LOG | |
228 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
229 | #endif | |
230 | return 0; | |
231 | } | |
232 | } | |
233 | } | |
234 | ||
235 | u16 psxMemRead16(u32 mem) { | |
236 | char *p; | |
237 | u32 t; | |
238 | ||
239 | t = mem >> 16; | |
9dd7d179 | 240 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
241 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
242 | return psxHu16(mem); |
243 | else | |
244 | return psxHwRead16(mem); | |
245 | } else { | |
246 | p = (char *)(psxMemRLUT[t]); | |
247 | if (p != NULL) { | |
248 | if (Config.Debug) | |
249 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
250 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
251 | } else { | |
252 | #ifdef PSXMEM_LOG | |
253 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
254 | #endif | |
255 | return 0; | |
256 | } | |
257 | } | |
258 | } | |
259 | ||
260 | u32 psxMemRead32(u32 mem) { | |
261 | char *p; | |
262 | u32 t; | |
263 | ||
264 | t = mem >> 16; | |
9dd7d179 | 265 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
266 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
267 | return psxHu32(mem); |
268 | else | |
269 | return psxHwRead32(mem); | |
270 | } else { | |
271 | p = (char *)(psxMemRLUT[t]); | |
272 | if (p != NULL) { | |
273 | if (Config.Debug) | |
274 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
275 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
276 | } else { | |
277 | #ifdef PSXMEM_LOG | |
278 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } | |
279 | #endif | |
280 | return 0; | |
281 | } | |
282 | } | |
283 | } | |
284 | ||
285 | void psxMemWrite8(u32 mem, u8 value) { | |
286 | char *p; | |
287 | u32 t; | |
288 | ||
289 | t = mem >> 16; | |
9dd7d179 | 290 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
291 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
292 | psxHu8(mem) = value; |
293 | else | |
294 | psxHwWrite8(mem, value); | |
295 | } else { | |
296 | p = (char *)(psxMemWLUT[t]); | |
297 | if (p != NULL) { | |
298 | if (Config.Debug) | |
299 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
300 | *(u8 *)(p + (mem & 0xffff)) = value; | |
301 | #ifdef PSXREC | |
302 | psxCpu->Clear((mem & (~3)), 1); | |
303 | #endif | |
304 | } else { | |
305 | #ifdef PSXMEM_LOG | |
306 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
307 | #endif | |
308 | } | |
309 | } | |
310 | } | |
311 | ||
312 | void psxMemWrite16(u32 mem, u16 value) { | |
313 | char *p; | |
314 | u32 t; | |
315 | ||
316 | t = mem >> 16; | |
9dd7d179 | 317 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
318 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
319 | psxHu16ref(mem) = SWAPu16(value); |
320 | else | |
321 | psxHwWrite16(mem, value); | |
322 | } else { | |
323 | p = (char *)(psxMemWLUT[t]); | |
324 | if (p != NULL) { | |
325 | if (Config.Debug) | |
326 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
327 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
328 | #ifdef PSXREC | |
3e31e934 | 329 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
330 | #endif |
331 | } else { | |
332 | #ifdef PSXMEM_LOG | |
333 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
334 | #endif | |
335 | } | |
336 | } | |
337 | } | |
338 | ||
339 | void psxMemWrite32(u32 mem, u32 value) { | |
340 | char *p; | |
341 | u32 t; | |
342 | ||
343 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); | |
344 | t = mem >> 16; | |
9dd7d179 | 345 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
346 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
347 | psxHu32ref(mem) = SWAPu32(value); |
348 | else | |
349 | psxHwWrite32(mem, value); | |
350 | } else { | |
351 | p = (char *)(psxMemWLUT[t]); | |
352 | if (p != NULL) { | |
353 | if (Config.Debug) | |
354 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
355 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
356 | #ifdef PSXREC | |
357 | psxCpu->Clear(mem, 1); | |
358 | #endif | |
359 | } else { | |
360 | if (mem != 0xfffe0130) { | |
361 | #ifdef PSXREC | |
362 | if (!writeok) | |
363 | psxCpu->Clear(mem, 1); | |
364 | #endif | |
365 | ||
366 | #ifdef PSXMEM_LOG | |
367 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } | |
368 | #endif | |
369 | } else { | |
370 | int i; | |
371 | ||
372 | switch (value) { | |
373 | case 0x800: case 0x804: | |
374 | if (writeok == 0) break; | |
375 | writeok = 0; | |
376 | memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *)); | |
377 | memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *)); | |
378 | memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *)); | |
379 | break; | |
380 | case 0x00: case 0x1e988: | |
381 | if (writeok == 1) break; | |
382 | writeok = 1; | |
383 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; | |
384 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
385 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
386 | break; | |
387 | default: | |
388 | #ifdef PSXMEM_LOG | |
389 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); | |
390 | #endif | |
391 | break; | |
392 | } | |
393 | } | |
394 | } | |
395 | } | |
396 | } | |
397 | ||
398 | void *psxMemPointer(u32 mem) { | |
399 | char *p; | |
400 | u32 t; | |
401 | ||
402 | t = mem >> 16; | |
9dd7d179 | 403 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
404 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
405 | return (void *)&psxH[mem]; |
406 | else | |
407 | return NULL; | |
408 | } else { | |
409 | p = (char *)(psxMemWLUT[t]); | |
410 | if (p != NULL) { | |
411 | return (void *)(p + (mem & 0xffff)); | |
412 | } | |
413 | return NULL; | |
414 | } | |
415 | } |