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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" | |
27 | #include "r3000a.h" | |
28 | #include "psxhw.h" | |
29 | #include <sys/mman.h> | |
30 | ||
31 | #ifndef MAP_ANONYMOUS | |
32 | #define MAP_ANONYMOUS MAP_ANON | |
33 | #endif | |
34 | ||
35 | s8 *psxM = NULL; // Kernel & User Memory (2 Meg) | |
36 | s8 *psxP = NULL; // Parallel Port (64K) | |
37 | s8 *psxR = NULL; // BIOS ROM (512K) | |
38 | s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K) | |
39 | ||
40 | u8 **psxMemWLUT = NULL; | |
41 | u8 **psxMemRLUT = NULL; | |
42 | ||
43 | /* Playstation Memory Map (from Playstation doc by Joshua Walker) | |
44 | 0x0000_0000-0x0000_ffff Kernel (64K) | |
45 | 0x0001_0000-0x001f_ffff User Memory (1.9 Meg) | |
46 | ||
47 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
48 | ||
49 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
50 | ||
51 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
52 | ||
53 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
54 | ||
55 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
56 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
57 | ||
58 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
59 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
60 | */ | |
61 | ||
62 | int psxMemInit() { | |
63 | int i; | |
64 | ||
65 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
66 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
67 | memset(psxMemRLUT, 0, 0x10000 * sizeof(void *)); | |
68 | memset(psxMemWLUT, 0, 0x10000 * sizeof(void *)); | |
69 | ||
f95a77f7 | 70 | psxM = mmap((void *)0x80000000, 0x00220000, |
ef79bbde P |
71 | PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
72 | ||
73 | psxP = &psxM[0x200000]; | |
74 | psxH = &psxM[0x210000]; | |
75 | ||
76 | psxR = (s8 *)malloc(0x00080000); | |
77 | ||
78 | if (psxMemRLUT == NULL || psxMemWLUT == NULL || | |
f95a77f7 | 79 | psxM != (void *)0x80000000 || psxP == NULL || psxH == NULL) { |
ef79bbde P |
80 | SysMessage(_("Error allocating memory!")); |
81 | return -1; | |
82 | } | |
83 | ||
84 | // MemR | |
85 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
86 | ||
87 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
88 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
89 | ||
90 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
91 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
92 | ||
93 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
94 | ||
95 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
96 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
97 | ||
98 | // MemW | |
99 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
100 | ||
101 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
102 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
103 | ||
104 | psxMemWLUT[0x1f00] = (u8 *)psxP; | |
105 | psxMemWLUT[0x1f80] = (u8 *)psxH; | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | void psxMemReset() { | |
111 | FILE *f = NULL; | |
112 | char bios[1024]; | |
113 | ||
114 | memset(psxM, 0, 0x00200000); | |
115 | memset(psxP, 0, 0x00010000); | |
116 | ||
117 | if (strcmp(Config.Bios, "HLE") != 0) { | |
118 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
119 | f = fopen(bios, "rb"); | |
120 | ||
121 | if (f == NULL) { | |
122 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
123 | memset(psxR, 0, 0x80000); | |
124 | Config.HLE = TRUE; | |
125 | } else { | |
126 | fread(psxR, 1, 0x80000, f); | |
127 | fclose(f); | |
128 | Config.HLE = FALSE; | |
129 | } | |
130 | } else Config.HLE = TRUE; | |
131 | } | |
132 | ||
133 | void psxMemShutdown() { | |
134 | munmap(psxM, 0x00220000); | |
135 | ||
136 | free(psxR); | |
137 | free(psxMemRLUT); | |
138 | free(psxMemWLUT); | |
139 | } | |
140 | ||
141 | static int writeok = 1; | |
142 | ||
143 | u8 psxMemRead8(u32 mem) { | |
144 | char *p; | |
145 | u32 t; | |
146 | ||
147 | t = mem >> 16; | |
148 | if (t == 0x1f80) { | |
149 | if (mem < 0x1f801000) | |
150 | return psxHu8(mem); | |
151 | else | |
152 | return psxHwRead8(mem); | |
153 | } else { | |
154 | p = (char *)(psxMemRLUT[t]); | |
155 | if (p != NULL) { | |
156 | if (Config.Debug) | |
157 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
158 | return *(u8 *)(p + (mem & 0xffff)); | |
159 | } else { | |
160 | #ifdef PSXMEM_LOG | |
161 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
162 | #endif | |
163 | return 0; | |
164 | } | |
165 | } | |
166 | } | |
167 | ||
168 | u16 psxMemRead16(u32 mem) { | |
169 | char *p; | |
170 | u32 t; | |
171 | ||
172 | t = mem >> 16; | |
173 | if (t == 0x1f80) { | |
174 | if (mem < 0x1f801000) | |
175 | return psxHu16(mem); | |
176 | else | |
177 | return psxHwRead16(mem); | |
178 | } else { | |
179 | p = (char *)(psxMemRLUT[t]); | |
180 | if (p != NULL) { | |
181 | if (Config.Debug) | |
182 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
183 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
184 | } else { | |
185 | #ifdef PSXMEM_LOG | |
186 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
187 | #endif | |
188 | return 0; | |
189 | } | |
190 | } | |
191 | } | |
192 | ||
193 | u32 psxMemRead32(u32 mem) { | |
194 | char *p; | |
195 | u32 t; | |
196 | ||
197 | t = mem >> 16; | |
198 | if (t == 0x1f80) { | |
199 | if (mem < 0x1f801000) | |
200 | return psxHu32(mem); | |
201 | else | |
202 | return psxHwRead32(mem); | |
203 | } else { | |
204 | p = (char *)(psxMemRLUT[t]); | |
205 | if (p != NULL) { | |
206 | if (Config.Debug) | |
207 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
208 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
209 | } else { | |
210 | #ifdef PSXMEM_LOG | |
211 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } | |
212 | #endif | |
213 | return 0; | |
214 | } | |
215 | } | |
216 | } | |
217 | ||
218 | void psxMemWrite8(u32 mem, u8 value) { | |
219 | char *p; | |
220 | u32 t; | |
221 | ||
222 | t = mem >> 16; | |
223 | if (t == 0x1f80) { | |
224 | if (mem < 0x1f801000) | |
225 | psxHu8(mem) = value; | |
226 | else | |
227 | psxHwWrite8(mem, value); | |
228 | } else { | |
229 | p = (char *)(psxMemWLUT[t]); | |
230 | if (p != NULL) { | |
231 | if (Config.Debug) | |
232 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
233 | *(u8 *)(p + (mem & 0xffff)) = value; | |
234 | #ifdef PSXREC | |
235 | psxCpu->Clear((mem & (~3)), 1); | |
236 | #endif | |
237 | } else { | |
238 | #ifdef PSXMEM_LOG | |
239 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
240 | #endif | |
241 | } | |
242 | } | |
243 | } | |
244 | ||
245 | void psxMemWrite16(u32 mem, u16 value) { | |
246 | char *p; | |
247 | u32 t; | |
248 | ||
249 | t = mem >> 16; | |
250 | if (t == 0x1f80) { | |
251 | if (mem < 0x1f801000) | |
252 | psxHu16ref(mem) = SWAPu16(value); | |
253 | else | |
254 | psxHwWrite16(mem, value); | |
255 | } else { | |
256 | p = (char *)(psxMemWLUT[t]); | |
257 | if (p != NULL) { | |
258 | if (Config.Debug) | |
259 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
260 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
261 | #ifdef PSXREC | |
262 | psxCpu->Clear((mem & (~1)), 1); | |
263 | #endif | |
264 | } else { | |
265 | #ifdef PSXMEM_LOG | |
266 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
267 | #endif | |
268 | } | |
269 | } | |
270 | } | |
271 | ||
272 | void psxMemWrite32(u32 mem, u32 value) { | |
273 | char *p; | |
274 | u32 t; | |
275 | ||
276 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); | |
277 | t = mem >> 16; | |
278 | if (t == 0x1f80) { | |
279 | if (mem < 0x1f801000) | |
280 | psxHu32ref(mem) = SWAPu32(value); | |
281 | else | |
282 | psxHwWrite32(mem, value); | |
283 | } else { | |
284 | p = (char *)(psxMemWLUT[t]); | |
285 | if (p != NULL) { | |
286 | if (Config.Debug) | |
287 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
288 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
289 | #ifdef PSXREC | |
290 | psxCpu->Clear(mem, 1); | |
291 | #endif | |
292 | } else { | |
293 | if (mem != 0xfffe0130) { | |
294 | #ifdef PSXREC | |
295 | if (!writeok) | |
296 | psxCpu->Clear(mem, 1); | |
297 | #endif | |
298 | ||
299 | #ifdef PSXMEM_LOG | |
300 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } | |
301 | #endif | |
302 | } else { | |
303 | int i; | |
304 | ||
305 | switch (value) { | |
306 | case 0x800: case 0x804: | |
307 | if (writeok == 0) break; | |
308 | writeok = 0; | |
309 | memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *)); | |
310 | memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *)); | |
311 | memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *)); | |
312 | break; | |
313 | case 0x00: case 0x1e988: | |
314 | if (writeok == 1) break; | |
315 | writeok = 1; | |
316 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; | |
317 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
318 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
319 | break; | |
320 | default: | |
321 | #ifdef PSXMEM_LOG | |
322 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); | |
323 | #endif | |
324 | break; | |
325 | } | |
326 | } | |
327 | } | |
328 | } | |
329 | } | |
330 | ||
331 | void *psxMemPointer(u32 mem) { | |
332 | char *p; | |
333 | u32 t; | |
334 | ||
335 | t = mem >> 16; | |
336 | if (t == 0x1f80) { | |
337 | if (mem < 0x1f801000) | |
338 | return (void *)&psxH[mem]; | |
339 | else | |
340 | return NULL; | |
341 | } else { | |
342 | p = (char *)(psxMemWLUT[t]); | |
343 | if (p != NULL) { | |
344 | return (void *)(p + (mem & 0xffff)); | |
345 | } | |
346 | return NULL; | |
347 | } | |
348 | } |