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32x: drc: new debug facility (pdb). Few fixes thanks to it.
[picodrive.git] / pico / cart.c
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cc68a136 1// This is part of Pico Library\r
2\r
3// (c) Copyright 2004 Dave, All rights reserved.\r
6cadc2da 4// (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r
cc68a136 5// Free for non-commercial use.\r
6\r
7// For commercial use, separate licencing terms must be obtained.\r
8\r
9\r
efcba75f 10#include "pico_int.h"\r
83bd0b76 11#include "../zlib/zlib.h"\r
12#include "../unzip/unzip.h"\r
13#include "../unzip/unzip_stream.h"\r
14\r
7336a99a 15\r
b081408f 16static int rom_alloc_size;\r
3e49ffd0 17static const char *rom_exts[] = { "bin", "gen", "smd", "iso", "sms", "gg", "sg" };\r
83bd0b76 18\r
45f2f245 19void (*PicoCartUnloadHook)(void);\r
20void (*PicoCartMemSetup)(void);\r
e807ac75 21\r
a9b3ffd3 22void (*PicoCartLoadProgressCB)(int percent) = NULL;\r
b2451ac6 23void (*PicoCDLoadProgressCB)(const char *fname, int percent) = NULL; // handled in Pico/cd/cd_file.c\r
a9b3ffd3 24\r
ae87bffa 25static void PicoCartDetect(const char *carthw_cfg);\r
d6114368 26\r
71de3cd9 27/* cso struct */\r
28typedef struct _cso_struct\r
29{\r
30 unsigned char in_buff[2*2048];\r
31 unsigned char out_buff[2048];\r
32 struct {\r
33 char magic[4];\r
34 unsigned int unused;\r
35 unsigned int total_bytes;\r
36 unsigned int total_bytes_high; // ignored here\r
37 unsigned int block_size; // 10h\r
38 unsigned char ver;\r
39 unsigned char align;\r
40 unsigned char reserved[2];\r
41 } header;\r
42 unsigned int fpos_in; // input file read pointer\r
43 unsigned int fpos_out; // pos in virtual decompressed file\r
44 int block_in_buff; // block which we have read in in_buff\r
45 int pad;\r
46 int index[0];\r
47}\r
48cso_struct;\r
49\r
50static int uncompress2(void *dest, int destLen, void *source, int sourceLen)\r
51{\r
52 z_stream stream;\r
53 int err;\r
54\r
55 stream.next_in = (Bytef*)source;\r
56 stream.avail_in = (uInt)sourceLen;\r
57 stream.next_out = dest;\r
58 stream.avail_out = (uInt)destLen;\r
59\r
60 stream.zalloc = NULL;\r
61 stream.zfree = NULL;\r
62\r
63 err = inflateInit2(&stream, -15);\r
64 if (err != Z_OK) return err;\r
65\r
66 err = inflate(&stream, Z_FINISH);\r
67 if (err != Z_STREAM_END) {\r
68 inflateEnd(&stream);\r
69 return err;\r
70 }\r
71 //*destLen = stream.total_out;\r
72\r
73 return inflateEnd(&stream);\r
74}\r
83bd0b76 75\r
87b0845f 76static const char *get_ext(const char *path)\r
77{\r
78 const char *ext;\r
79 if (strlen(path) < 4)\r
80 return ""; // no ext\r
81\r
82 // allow 2 or 3 char extensions for now\r
83 ext = path + strlen(path) - 2;\r
84 if (ext[-1] != '.') ext--;\r
85 if (ext[-1] != '.')\r
86 return "";\r
87 return ext;\r
88}\r
89\r
83bd0b76 90pm_file *pm_open(const char *path)\r
91{\r
92 pm_file *file = NULL;\r
93 const char *ext;\r
94 FILE *f;\r
95\r
87b0845f 96 if (path == NULL)\r
97 return NULL;\r
83bd0b76 98\r
87b0845f 99 ext = get_ext(path);\r
100 if (strcasecmp(ext, "zip") == 0)\r
83bd0b76 101 {\r
102 struct zipent *zipentry;\r
103 gzFile gzf = NULL;\r
104 ZIP *zipfile;\r
105 int i;\r
106\r
107 zipfile = openzip(path);\r
83bd0b76 108 if (zipfile != NULL)\r
109 {\r
110 /* search for suitable file (right extension or large enough file) */\r
111 while ((zipentry = readzip(zipfile)) != NULL)\r
112 {\r
87b0845f 113 ext = get_ext(zipentry->name);\r
83bd0b76 114\r
87b0845f 115 if (zipentry->uncompressed_size >= 32*1024)\r
116 goto found_rom_zip;\r
3e49ffd0 117\r
83bd0b76 118 for (i = 0; i < sizeof(rom_exts)/sizeof(rom_exts[0]); i++)\r
87b0845f 119 if (strcasecmp(ext, rom_exts[i]) == 0)\r
120 goto found_rom_zip;\r
83bd0b76 121 }\r
122\r
123 /* zipfile given, but nothing found suitable for us inside */\r
124 goto zip_failed;\r
125\r
126found_rom_zip:\r
127 /* try to convert to gzip stream, so we could use standard gzio functions from zlib */\r
128 gzf = zip2gz(zipfile, zipentry);\r
129 if (gzf == NULL) goto zip_failed;\r
130\r
87b0845f 131 file = calloc(1, sizeof(*file));\r
83bd0b76 132 if (file == NULL) goto zip_failed;\r
133 file->file = zipfile;\r
134 file->param = gzf;\r
135 file->size = zipentry->uncompressed_size;\r
136 file->type = PMT_ZIP;\r
87b0845f 137 strncpy(file->ext, ext, sizeof(file->ext) - 1);\r
83bd0b76 138 return file;\r
139\r
140zip_failed:\r
141 if (gzf) {\r
142 gzclose(gzf);\r
143 zipfile->fp = NULL; // gzclose() closed it\r
144 }\r
145 closezip(zipfile);\r
146 return NULL;\r
147 }\r
148 }\r
87b0845f 149 else if (strcasecmp(ext, "cso") == 0)\r
71de3cd9 150 {\r
151 cso_struct *cso = NULL, *tmp = NULL;\r
152 int size;\r
153 f = fopen(path, "rb");\r
154 if (f == NULL)\r
155 goto cso_failed;\r
156\r
f8af9634 157#ifndef __EPOC32__\r
2d2247c2 158 /* we use our own buffering */\r
159 setvbuf(f, NULL, _IONBF, 0);\r
f8af9634 160#endif\r
2d2247c2 161\r
71de3cd9 162 cso = malloc(sizeof(*cso));\r
163 if (cso == NULL)\r
164 goto cso_failed;\r
165\r
166 if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header))\r
167 goto cso_failed;\r
168\r
169 if (strncmp(cso->header.magic, "CISO", 4) != 0) {\r
170 elprintf(EL_STATUS, "cso: bad header");\r
171 goto cso_failed;\r
172 }\r
173\r
174 if (cso->header.block_size != 2048) {\r
175 elprintf(EL_STATUS, "cso: bad block size (%u)", cso->header.block_size);\r
176 goto cso_failed;\r
177 }\r
178\r
179 size = ((cso->header.total_bytes >> 11) + 1)*4 + sizeof(*cso);\r
180 tmp = realloc(cso, size);\r
181 if (tmp == NULL)\r
182 goto cso_failed;\r
183 cso = tmp;\r
184 elprintf(EL_STATUS, "allocated %i bytes for CSO struct", size);\r
185\r
186 size -= sizeof(*cso); // index size\r
187 if (fread(cso->index, 1, size, f) != size) {\r
188 elprintf(EL_STATUS, "cso: premature EOF");\r
189 goto cso_failed;\r
190 }\r
191\r
192 // all ok\r
193 cso->fpos_in = ftell(f);\r
194 cso->fpos_out = 0;\r
195 cso->block_in_buff = -1;\r
87b0845f 196 file = calloc(1, sizeof(*file));\r
71de3cd9 197 if (file == NULL) goto cso_failed;\r
198 file->file = f;\r
199 file->param = cso;\r
200 file->size = cso->header.total_bytes;\r
201 file->type = PMT_CSO;\r
202 return file;\r
203\r
204cso_failed:\r
205 if (cso != NULL) free(cso);\r
206 if (f != NULL) fclose(f);\r
207 return NULL;\r
208 }\r
83bd0b76 209\r
210 /* not a zip, treat as uncompressed file */\r
211 f = fopen(path, "rb");\r
212 if (f == NULL) return NULL;\r
213\r
87b0845f 214 file = calloc(1, sizeof(*file));\r
83bd0b76 215 if (file == NULL) {\r
216 fclose(f);\r
217 return NULL;\r
218 }\r
219 fseek(f, 0, SEEK_END);\r
220 file->file = f;\r
221 file->param = NULL;\r
222 file->size = ftell(f);\r
223 file->type = PMT_UNCOMPRESSED;\r
87b0845f 224 strncpy(file->ext, ext, sizeof(file->ext) - 1);\r
83bd0b76 225 fseek(f, 0, SEEK_SET);\r
d6114368 226\r
f8af9634 227#ifndef __EPOC32__ // makes things worse on Symbian\r
228 if (file->size > 0x400000)\r
229 /* we use our own buffering */\r
230 setvbuf(f, NULL, _IONBF, 0);\r
231#endif\r
232\r
83bd0b76 233 return file;\r
234}\r
235\r
236size_t pm_read(void *ptr, size_t bytes, pm_file *stream)\r
237{\r
238 int ret;\r
239\r
240 if (stream->type == PMT_UNCOMPRESSED)\r
241 {\r
242 ret = fread(ptr, 1, bytes, stream->file);\r
243 }\r
244 else if (stream->type == PMT_ZIP)\r
245 {\r
246 gzFile gf = stream->param;\r
247 int err;\r
248 ret = gzread(gf, ptr, bytes);\r
249 err = gzerror2(gf);\r
250 if (ret > 0 && (err == Z_DATA_ERROR || err == Z_STREAM_END))\r
251 /* we must reset stream pointer or else next seek/read fails */\r
252 gzrewind(gf);\r
253 }\r
71de3cd9 254 else if (stream->type == PMT_CSO)\r
255 {\r
256 cso_struct *cso = stream->param;\r
257 int read_pos, read_len, out_offs, rret;\r
258 int block = cso->fpos_out >> 11;\r
259 int index = cso->index[block];\r
260 int index_end = cso->index[block+1];\r
261 unsigned char *out = ptr, *tmp_dst;\r
262\r
263 ret = 0;\r
264 while (bytes != 0)\r
265 {\r
266 out_offs = cso->fpos_out&0x7ff;\r
267 if (out_offs == 0 && bytes >= 2048)\r
268 tmp_dst = out;\r
269 else tmp_dst = cso->out_buff;\r
270\r
271 read_pos = (index&0x7fffffff) << cso->header.align;\r
272\r
273 if (index < 0) {\r
274 if (read_pos != cso->fpos_in)\r
275 fseek(stream->file, read_pos, SEEK_SET);\r
276 rret = fread(tmp_dst, 1, 2048, stream->file);\r
277 cso->fpos_in = read_pos + rret;\r
278 if (rret != 2048) break;\r
279 } else {\r
280 read_len = (((index_end&0x7fffffff) << cso->header.align) - read_pos) & 0xfff;\r
281 if (block != cso->block_in_buff)\r
282 {\r
283 if (read_pos != cso->fpos_in)\r
ff6b7429 284 fseek(stream->file, read_pos, SEEK_SET);\r
71de3cd9 285 rret = fread(cso->in_buff, 1, read_len, stream->file);\r
286 cso->fpos_in = read_pos + rret;\r
287 if (rret != read_len) {\r
288 elprintf(EL_STATUS, "cso: read failed @ %08x", read_pos);\r
289 break;\r
290 }\r
291 cso->block_in_buff = block;\r
292 }\r
293 rret = uncompress2(tmp_dst, 2048, cso->in_buff, read_len);\r
294 if (rret != 0) {\r
295 elprintf(EL_STATUS, "cso: uncompress failed @ %08x with %i", read_pos, rret);\r
296 break;\r
297 }\r
298 }\r
299\r
300 rret = 2048;\r
301 if (out_offs != 0 || bytes < 2048) {\r
302 //elprintf(EL_STATUS, "cso: unaligned/nonfull @ %08x, offs=%i, len=%u", cso->fpos_out, out_offs, bytes);\r
303 if (bytes < rret) rret = bytes;\r
304 if (2048 - out_offs < rret) rret = 2048 - out_offs;\r
305 memcpy(out, tmp_dst + out_offs, rret);\r
306 }\r
307 ret += rret;\r
308 out += rret;\r
309 cso->fpos_out += rret;\r
310 bytes -= rret;\r
311 block++;\r
312 index = index_end;\r
313 index_end = cso->index[block+1];\r
314 }\r
315 }\r
83bd0b76 316 else\r
317 ret = 0;\r
318\r
319 return ret;\r
320}\r
321\r
322int pm_seek(pm_file *stream, long offset, int whence)\r
323{\r
324 if (stream->type == PMT_UNCOMPRESSED)\r
325 {\r
7336a99a 326 fseek(stream->file, offset, whence);\r
327 return ftell(stream->file);\r
83bd0b76 328 }\r
329 else if (stream->type == PMT_ZIP)\r
330 {\r
66fdc0f0 331 if (PicoMessage != NULL && offset > 6*1024*1024) {\r
332 long pos = gztell((gzFile) stream->param);\r
333 if (offset < pos || offset - pos > 6*1024*1024)\r
334 PicoMessage("Decompressing data...");\r
335 }\r
83bd0b76 336 return gzseek((gzFile) stream->param, offset, whence);\r
337 }\r
71de3cd9 338 else if (stream->type == PMT_CSO)\r
339 {\r
340 cso_struct *cso = stream->param;\r
341 switch (whence)\r
342 {\r
343 case SEEK_CUR: cso->fpos_out += offset; break;\r
344 case SEEK_SET: cso->fpos_out = offset; break;\r
345 case SEEK_END: cso->fpos_out = cso->header.total_bytes - offset; break;\r
346 }\r
347 return cso->fpos_out;\r
348 }\r
83bd0b76 349 else\r
350 return -1;\r
351}\r
352\r
353int pm_close(pm_file *fp)\r
354{\r
355 int ret = 0;\r
356\r
357 if (fp == NULL) return EOF;\r
358\r
359 if (fp->type == PMT_UNCOMPRESSED)\r
360 {\r
361 fclose(fp->file);\r
362 }\r
363 else if (fp->type == PMT_ZIP)\r
364 {\r
365 ZIP *zipfile = fp->file;\r
366 gzclose((gzFile) fp->param);\r
367 zipfile->fp = NULL; // gzclose() closed it\r
368 closezip(zipfile);\r
369 }\r
71de3cd9 370 else if (fp->type == PMT_CSO)\r
371 {\r
372 free(fp->param);\r
373 fclose(fp->file);\r
374 }\r
83bd0b76 375 else\r
376 ret = EOF;\r
377\r
378 free(fp);\r
379 return ret;\r
380}\r
381\r
83ff19ec 382// byteswap, data needs to be int aligned, src can match dst\r
383void Byteswap(void *dst, const void *src, int len)\r
cc68a136 384{\r
83ff19ec 385 const unsigned int *ps = src;\r
386 unsigned int *pd = dst;\r
387 int i, m;\r
cc68a136 388\r
83ff19ec 389 if (len < 2)\r
390 return;\r
cc68a136 391\r
83ff19ec 392 m = 0x00ff00ff;\r
393 for (i = 0; i < len / 4; i++) {\r
394 unsigned int t = ps[i];\r
395 pd[i] = ((t & m) << 8) | ((t & ~m) >> 8);\r
cc68a136 396 }\r
cc68a136 397}\r
398\r
399// Interleve a 16k block and byteswap\r
400static int InterleveBlock(unsigned char *dest,unsigned char *src)\r
401{\r
402 int i=0;\r
403 for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd\r
404 for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even\r
405 return 0;\r
406}\r
407\r
408// Decode a SMD file\r
409static int DecodeSmd(unsigned char *data,int len)\r
410{\r
411 unsigned char *temp=NULL;\r
412 int i=0;\r
413\r
414 temp=(unsigned char *)malloc(0x4000);\r
415 if (temp==NULL) return 1;\r
416 memset(temp,0,0x4000);\r
417\r
418 // Interleve each 16k block and shift down by 0x200:\r
419 for (i=0; i+0x4200<=len; i+=0x4000)\r
420 {\r
421 InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer\r
422 memcpy(data+i,temp,0x4000); // Copy back in\r
423 }\r
424\r
425 free(temp);\r
426 return 0;\r
427}\r
428\r
87b0845f 429static unsigned char *PicoCartAlloc(int filesize, int is_sms)\r
cc68a136 430{\r
cc68a136 431 unsigned char *rom;\r
432\r
87b0845f 433 if (is_sms) {\r
434 // make size power of 2 for easier banking handling\r
435 int s = 0, tmp = filesize;\r
436 while ((tmp >>= 1) != 0)\r
437 s++;\r
438 if (filesize > (1 << s))\r
439 s++;\r
b081408f 440 rom_alloc_size = 1 << s;\r
87b0845f 441 }\r
442 else {\r
b081408f 443 // make alloc size at least sizeof(mcd_state),\r
444 // in case we want to switch to CD mode\r
445 if (filesize < sizeof(mcd_state))\r
446 filesize = sizeof(mcd_state);\r
447\r
87b0845f 448 // align to 512K for memhandlers\r
b081408f 449 rom_alloc_size = (filesize + 0x7ffff) & ~0x7ffff;\r
87b0845f 450 }\r
cc68a136 451\r
b081408f 452 if (rom_alloc_size - filesize < 4)\r
453 rom_alloc_size += 4; // padding for out-of-bound exec protection\r
cc68a136 454\r
455 // Allocate space for the rom plus padding\r
b081408f 456 // use special address for 32x dynarec\r
457 rom = plat_mmap(0x02000000, rom_alloc_size);\r
cc68a136 458 return rom;\r
459}\r
460\r
3e49ffd0 461int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms)\r
cc68a136 462{\r
87b0845f 463 unsigned char *rom;\r
464 int size, bytes_read;\r
cc68a136 465\r
87b0845f 466 if (f == NULL)\r
467 return 1;\r
468\r
469 size = f->size;\r
cc68a136 470 if (size <= 0) return 1;\r
87b0845f 471 size = (size+3)&~3; // Round up to a multiple of 4\r
cc68a136 472\r
473 // Allocate space for the rom plus padding\r
87b0845f 474 rom = PicoCartAlloc(size, is_sms);\r
475 if (rom == NULL) {\r
c6196c0f 476 elprintf(EL_STATUS, "out of memory (wanted %i)", size);\r
f8af9634 477 return 2;\r
7336a99a 478 }\r
cc68a136 479\r
a9b3ffd3 480 if (PicoCartLoadProgressCB != NULL)\r
481 {\r
482 // read ROM in blocks, just for fun\r
483 int ret;\r
484 unsigned char *p = rom;\r
485 bytes_read=0;\r
486 do\r
487 {\r
488 int todo = size - bytes_read;\r
489 if (todo > 256*1024) todo = 256*1024;\r
490 ret = pm_read(p,todo,f);\r
491 bytes_read += ret;\r
492 p += ret;\r
493 PicoCartLoadProgressCB(bytes_read * 100 / size);\r
494 }\r
495 while (ret > 0);\r
496 }\r
497 else\r
498 bytes_read = pm_read(rom,size,f); // Load up the rom\r
499 if (bytes_read <= 0) {\r
c6196c0f 500 elprintf(EL_STATUS, "read failed");\r
a9b3ffd3 501 free(rom);\r
f8af9634 502 return 3;\r
a9b3ffd3 503 }\r
bf098bc5 504\r
3e49ffd0 505 if (!is_sms)\r
506 {\r
507 // maybe we are loading MegaCD BIOS?\r
508 if (!(PicoAHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) ||\r
509 !strncmp((char *)rom+0x128, "BOOT", 4))) {\r
510 PicoAHW |= PAHW_MCD;\r
3e49ffd0 511 }\r
cc68a136 512\r
3e49ffd0 513 // Check for SMD:\r
87b0845f 514 if (size >= 0x4200 && (size&0x3fff) == 0x200 &&\r
3e49ffd0 515 ((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) {\r
87b0845f 516 elprintf(EL_STATUS, "SMD format detected.");\r
3e49ffd0 517 DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD\r
518 }\r
83ff19ec 519 else Byteswap(rom, rom, size); // Just byteswap\r
21395e38 520 }\r
87b0845f 521 else\r
522 {\r
523 if (size >= 0x4200 && (size&0x3fff) == 0x200) {\r
524 elprintf(EL_STATUS, "SMD format detected.");\r
525 // at least here it's not interleaved\r
526 size -= 0x200;\r
527 memmove(rom, rom + 0x200, size);\r
528 }\r
529 }\r
cc68a136 530\r
87b0845f 531 if (prom) *prom = rom;\r
532 if (psize) *psize = size;\r
cc68a136 533\r
534 return 0;\r
535}\r
536\r
f8ef8ff7 537// Insert a cartridge:\r
ae87bffa 538int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_cfg)\r
cc68a136 539{\r
540 // notaz: add a 68k "jump one op back" opcode to the end of ROM.\r
541 // This will hang the emu, but will prevent nasty crashes.\r
542 // note: 4 bytes are padded to every ROM\r
d6114368 543 if (rom != NULL)\r
cc68a136 544 *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped\r
545\r
cc68a136 546 Pico.rom=rom;\r
547 Pico.romsize=romsize;\r
548\r
d6114368 549 if (SRam.data) {\r
550 free(SRam.data);\r
551 SRam.data = NULL;\r
552 }\r
553\r
e807ac75 554 if (PicoCartUnloadHook != NULL) {\r
555 PicoCartUnloadHook();\r
556 PicoCartUnloadHook = NULL;\r
557 }\r
558\r
3e49ffd0 559 PicoAHW &= PAHW_MCD|PAHW_SMS;\r
602133e1 560\r
45f2f245 561 PicoCartMemSetup = NULL;\r
f8ef8ff7 562 PicoDmaHook = NULL;\r
563 PicoResetHook = NULL;\r
017512f2 564 PicoLineHook = NULL;\r
fad24893 565 PicoLoadStateHook = NULL;\r
945c2fdc 566 carthw_chunks = NULL;\r
f8ef8ff7 567\r
3e49ffd0 568 if (!(PicoAHW & (PAHW_MCD|PAHW_SMS)))\r
ae87bffa 569 PicoCartDetect(carthw_cfg);\r
f8ef8ff7 570\r
1dceadae 571 // setup correct memory map for loaded ROM\r
9037e45d 572 switch (PicoAHW) {\r
573 default:\r
574 elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoAHW);\r
575 case 0:\r
576 case PAHW_SVP: PicoMemSetup(); break;\r
577 case PAHW_MCD: PicoMemSetupCD(); break;\r
578 case PAHW_PICO: PicoMemSetupPico(); break;\r
3e49ffd0 579 case PAHW_SMS: PicoMemSetupMS(); break;\r
9037e45d 580 }\r
1dceadae 581\r
45f2f245 582 if (PicoCartMemSetup != NULL)\r
583 PicoCartMemSetup();\r
584\r
3e49ffd0 585 if (PicoAHW & PAHW_SMS)\r
586 PicoPowerMS();\r
587 else\r
588 PicoPower();\r
589\r
1cb1584b 590 return 0;\r
cc68a136 591}\r
592\r
2aa27095 593void PicoCartUnload(void)\r
cc68a136 594{\r
3e49ffd0 595 if (PicoCartUnloadHook != NULL) {\r
596 PicoCartUnloadHook();\r
597 PicoCartUnloadHook = NULL;\r
598 }\r
599\r
5e49c3a8 600 if (PicoAHW & PAHW_32X)\r
601 PicoUnload32x();\r
602\r
a12b1b29 603 if (Pico.rom != NULL) {\r
053fd9b4 604 SekFinishIdleDet();\r
b081408f 605 plat_munmap(Pico.rom, rom_alloc_size);\r
606 Pico.rom = NULL;\r
a12b1b29 607 }\r
cc68a136 608}\r
609\r
000f5335 610static unsigned int rom_crc32(void)\r
611{\r
612 unsigned int crc;\r
613 elprintf(EL_STATUS, "caclulating CRC32..");\r
614\r
615 // have to unbyteswap for calculation..\r
83ff19ec 616 Byteswap(Pico.rom, Pico.rom, Pico.romsize);\r
000f5335 617 crc = crc32(0, Pico.rom, Pico.romsize);\r
83ff19ec 618 Byteswap(Pico.rom, Pico.rom, Pico.romsize);\r
000f5335 619 return crc;\r
620}\r
621\r
1f4e9f14 622static int rom_strcmp(int rom_offset, const char *s1)\r
1dceadae 623{\r
1f4e9f14 624 int i, len = strlen(s1);\r
45f2f245 625 const char *s_rom = (const char *)Pico.rom;\r
1dceadae 626 for (i = 0; i < len; i++)\r
45f2f245 627 if (s1[i] != s_rom[(i + rom_offset) ^ 1])\r
1dceadae 628 return 1;\r
629 return 0;\r
630}\r
631\r
af37bca8 632static unsigned int rom_read32(int addr)\r
633{\r
634 unsigned short *m = (unsigned short *)(Pico.rom + addr);\r
635 return (m[0] << 16) | m[1];\r
636}\r
637\r
45f2f245 638static char *sskip(char *s)\r
639{\r
640 while (*s && isspace_(*s))\r
641 s++;\r
642 return s;\r
643}\r
644\r
645static void rstrip(char *s)\r
646{\r
647 char *p;\r
648 for (p = s + strlen(s) - 1; p >= s; p--)\r
649 if (isspace_(*p))\r
650 *p = 0;\r
651}\r
652\r
000f5335 653static int parse_3_vals(char *p, int *val0, int *val1, int *val2)\r
654{\r
655 char *r;\r
656 *val0 = strtoul(p, &r, 0);\r
657 if (r == p)\r
658 goto bad;\r
659 p = sskip(r);\r
660 if (*p++ != ',')\r
661 goto bad;\r
662 *val1 = strtoul(p, &r, 0);\r
663 if (r == p)\r
664 goto bad;\r
665 p = sskip(r);\r
666 if (*p++ != ',')\r
667 goto bad;\r
668 *val2 = strtoul(p, &r, 0);\r
669 if (r == p)\r
670 goto bad;\r
671\r
672 return 1;\r
673bad:\r
674 return 0;\r
675}\r
676\r
45f2f245 677static int is_expr(const char *expr, char **pr)\r
678{\r
679 int len = strlen(expr);\r
680 char *p = *pr;\r
681\r
682 if (strncmp(expr, p, len) != 0)\r
683 return 0;\r
684 p = sskip(p + len);\r
685 if (*p != '=')\r
686 return 0; // wrong or malformed\r
687\r
688 *pr = sskip(p + 1);\r
689 return 1;\r
690}\r
691\r
ae87bffa 692static void parse_carthw(const char *carthw_cfg, int *fill_sram)\r
45f2f245 693{\r
694 int line = 0, any_checks_passed = 0, skip_sect = 0;\r
000f5335 695 int tmp, rom_crc = 0;\r
45f2f245 696 char buff[256], *p, *r;\r
697 FILE *f;\r
698\r
ae87bffa 699 f = fopen(carthw_cfg, "r");\r
45f2f245 700 if (f == NULL) {\r
ae87bffa 701 elprintf(EL_STATUS, "couldn't open carthw.cfg!");\r
45f2f245 702 return;\r
703 }\r
704\r
705 while ((p = fgets(buff, sizeof(buff), f)))\r
706 {\r
707 line++;\r
708 p = sskip(p);\r
709 if (*p == 0 || *p == '#')\r
710 continue;\r
711\r
712 if (*p == '[') {\r
713 any_checks_passed = 0;\r
714 skip_sect = 0;\r
715 continue;\r
716 }\r
717 \r
718 if (skip_sect)\r
719 continue;\r
720\r
721 /* look for checks */\r
722 if (is_expr("check_str", &p))\r
723 {\r
724 int offs;\r
725 offs = strtoul(p, &r, 0);\r
726 if (offs < 0 || offs > Pico.romsize) {\r
727 elprintf(EL_STATUS, "carthw:%d: check_str offs out of range: %d\n", line, offs);\r
728 goto bad;\r
729 }\r
730 p = sskip(r);\r
731 if (*p != ',')\r
732 goto bad;\r
733 p = sskip(p + 1);\r
734 if (*p != '"')\r
735 goto bad;\r
736 p++;\r
737 r = strchr(p, '"');\r
738 if (r == NULL)\r
739 goto bad;\r
740 *r = 0;\r
741\r
742 if (rom_strcmp(offs, p) == 0)\r
743 any_checks_passed = 1;\r
744 else\r
745 skip_sect = 1;\r
746 continue;\r
747 }\r
748 else if (is_expr("check_size_gt", &p))\r
749 {\r
750 int size;\r
751 size = strtoul(p, &r, 0);\r
752 if (r == p || size < 0)\r
753 goto bad;\r
754\r
755 if (Pico.romsize > size)\r
756 any_checks_passed = 1;\r
757 else\r
758 skip_sect = 1;\r
759 continue;\r
760 }\r
761 else if (is_expr("check_csum", &p))\r
762 {\r
763 int csum;\r
764 csum = strtoul(p, &r, 0);\r
765 if (r == p || (csum & 0xffff0000))\r
766 goto bad;\r
767\r
768 if (csum == (rom_read32(0x18c) & 0xffff))\r
769 any_checks_passed = 1;\r
770 else\r
771 skip_sect = 1;\r
772 continue;\r
773 }\r
000f5335 774 else if (is_expr("check_crc32", &p))\r
775 {\r
776 unsigned int crc;\r
777 crc = strtoul(p, &r, 0);\r
778 if (r == p)\r
779 goto bad;\r
780\r
781 if (rom_crc == 0)\r
782 rom_crc = rom_crc32();\r
783 if (crc == rom_crc)\r
784 any_checks_passed = 1;\r
785 else\r
786 skip_sect = 1;\r
787 continue;\r
788 }\r
45f2f245 789\r
790 /* now time for actions */\r
791 if (is_expr("hw", &p)) {\r
792 if (!any_checks_passed)\r
793 goto no_checks;\r
794 rstrip(p);\r
795\r
796 if (strcmp(p, "svp") == 0)\r
797 PicoSVPStartup();\r
798 else if (strcmp(p, "pico") == 0)\r
799 PicoInitPico();\r
000f5335 800 else if (strcmp(p, "prot") == 0)\r
801 carthw_sprot_startup();\r
802 else if (strcmp(p, "ssf2_mapper") == 0)\r
803 carthw_ssf2_startup();\r
45f2f245 804 else if (strcmp(p, "x_in_1_mapper") == 0)\r
805 carthw_Xin1_startup();\r
806 else if (strcmp(p, "realtec_mapper") == 0)\r
807 carthw_realtec_startup();\r
808 else if (strcmp(p, "radica_mapper") == 0)\r
809 carthw_radica_startup();\r
000f5335 810 else if (strcmp(p, "prot_lk3") == 0)\r
811 carthw_prot_lk3_startup();\r
45f2f245 812 else {\r
813 elprintf(EL_STATUS, "carthw:%d: unsupported mapper: %s", line, p);\r
814 skip_sect = 1;\r
815 }\r
816 continue;\r
817 }\r
818 if (is_expr("sram_range", &p)) {\r
819 int start, end;\r
820\r
821 if (!any_checks_passed)\r
822 goto no_checks;\r
823 rstrip(p);\r
824\r
825 start = strtoul(p, &r, 0);\r
826 if (r == p)\r
827 goto bad;\r
828 p = sskip(r);\r
829 if (*p != ',')\r
830 goto bad;\r
831 p = sskip(p + 1);\r
832 end = strtoul(p, &r, 0);\r
833 if (r == p)\r
834 goto bad;\r
835 if (((start | end) & 0xff000000) || start > end) {\r
836 elprintf(EL_STATUS, "carthw:%d: bad sram_range: %08x - %08x", line, start, end);\r
837 goto bad_nomsg;\r
838 }\r
839 SRam.start = start;\r
840 SRam.end = end;\r
841 continue;\r
842 }\r
843 else if (is_expr("prop", &p)) {\r
844 if (!any_checks_passed)\r
845 goto no_checks;\r
846 rstrip(p);\r
847\r
848 if (strcmp(p, "no_sram") == 0)\r
849 SRam.flags &= ~SRF_ENABLED;\r
850 else if (strcmp(p, "no_eeprom") == 0)\r
851 SRam.flags &= ~SRF_EEPROM;\r
852 else if (strcmp(p, "filled_sram") == 0)\r
853 *fill_sram = 1;\r
854 else {\r
855 elprintf(EL_STATUS, "carthw:%d: unsupported prop: %s", line, p);\r
856 goto bad_nomsg;\r
857 }\r
858 continue;\r
859 }\r
860 else if (is_expr("eeprom_type", &p)) {\r
861 int type;\r
862 if (!any_checks_passed)\r
863 goto no_checks;\r
864 rstrip(p);\r
865\r
866 type = strtoul(p, &r, 0);\r
867 if (r == p || type < 0)\r
868 goto bad;\r
869 SRam.eeprom_type = type;\r
870 SRam.flags |= SRF_EEPROM;\r
871 continue;\r
872 }\r
873 else if (is_expr("eeprom_lines", &p)) {\r
874 int scl, sda_in, sda_out;\r
875 if (!any_checks_passed)\r
876 goto no_checks;\r
877 rstrip(p);\r
878\r
000f5335 879 if (!parse_3_vals(p, &scl, &sda_in, &sda_out))\r
45f2f245 880 goto bad;\r
000f5335 881 if (scl < 0 || scl > 15 || sda_in < 0 || sda_in > 15 ||\r
882 sda_out < 0 || sda_out > 15)\r
45f2f245 883 goto bad;\r
884\r
885 SRam.eeprom_bit_cl = scl;\r
886 SRam.eeprom_bit_in = sda_in;\r
887 SRam.eeprom_bit_out= sda_out;\r
888 continue;\r
889 }\r
000f5335 890 else if ((tmp = is_expr("prot_ro_value16", &p)) || is_expr("prot_rw_value16", &p)) {\r
891 int addr, mask, val;\r
892 if (!any_checks_passed)\r
893 goto no_checks;\r
894 rstrip(p);\r
895\r
896 if (!parse_3_vals(p, &addr, &mask, &val))\r
897 goto bad;\r
898\r
899 carthw_sprot_new_location(addr, mask, val, tmp ? 1 : 0);\r
900 continue;\r
901 }\r
45f2f245 902\r
903\r
904bad:\r
905 elprintf(EL_STATUS, "carthw:%d: unrecognized expression: %s", line, buff);\r
906bad_nomsg:\r
907 skip_sect = 1;\r
908 continue;\r
909\r
910no_checks:\r
911 elprintf(EL_STATUS, "carthw:%d: command without any checks before it: %s", line, buff);\r
912 skip_sect = 1;\r
913 continue;\r
914 }\r
915 fclose(f);\r
916}\r
917\r
a12b1b29 918/*\r
919 * various cart-specific things, which can't be handled by generic code\r
a12b1b29 920 */\r
ae87bffa 921static void PicoCartDetect(const char *carthw_cfg)\r
1dceadae 922{\r
000f5335 923 int fill_sram = 0;\r
1dceadae 924\r
45f2f245 925 memset(&SRam, 0, sizeof(SRam));\r
1dceadae 926 if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')\r
927 {\r
45f2f245 928 SRam.start = rom_read32(0x1B4) & ~0xff000001; // align\r
929 SRam.end = (rom_read32(0x1B8) & ~0xff000000) | 1;\r
1dceadae 930 if (Pico.rom[0x1B2] & 0x40)\r
1dceadae 931 // EEPROM\r
45f2f245 932 SRam.flags |= SRF_EEPROM;\r
933 SRam.flags |= SRF_ENABLED;\r
1dceadae 934 }\r
45f2f245 935 if (SRam.end == 0 || SRam.start > SRam.end)\r
1dceadae 936 {\r
937 // some games may have bad headers, like S&K and Sonic3\r
938 // note: majority games use 0x200000 as starting address, but there are some which\r
939 // use something else (0x300000 by HardBall '95). Luckily they have good headers.\r
940 SRam.start = 0x200000;\r
941 SRam.end = 0x203FFF;\r
45f2f245 942 SRam.flags |= SRF_ENABLED;\r
1dceadae 943 }\r
1dceadae 944\r
945 // set EEPROM defaults, in case it gets detected\r
946 SRam.eeprom_type = 0; // 7bit (24C01)\r
1dceadae 947 SRam.eeprom_bit_cl = 1;\r
948 SRam.eeprom_bit_in = 0;\r
949 SRam.eeprom_bit_out= 0;\r
950\r
ae87bffa 951 if (carthw_cfg != NULL)\r
952 parse_carthw(carthw_cfg, &fill_sram);\r
9037e45d 953\r
45f2f245 954 if (SRam.flags & SRF_ENABLED)\r
757f8dae 955 {\r
45f2f245 956 if (SRam.flags & SRF_EEPROM)\r
957 SRam.size = 0x2000;\r
958 else\r
959 SRam.size = SRam.end - SRam.start + 1;\r
757f8dae 960\r
45f2f245 961 SRam.data = calloc(SRam.size, 1);\r
962 if (SRam.data == NULL)\r
963 SRam.flags &= ~SRF_ENABLED;\r
a12b1b29 964\r
45f2f245 965 if (SRam.eeprom_type == 1) // 1 == 0 in PD EEPROM code\r
966 SRam.eeprom_type = 0;\r
0b35350d 967 }\r
968\r
45f2f245 969 if ((SRam.flags & SRF_ENABLED) && fill_sram)\r
757f8dae 970 {\r
45f2f245 971 elprintf(EL_STATUS, "SRAM fill");\r
972 memset(SRam.data, 0xff, SRam.size);\r
757f8dae 973 }\r
1f4e9f14 974\r
975 // Unusual region 'code'\r
453d2a6e 976 if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)\r
45f2f245 977 *(int *) (Pico.rom + 0x1f0) = 0x20204520;\r
1dceadae 978}\r
979\r
fast MegaDrive/MegaCD/32X emulator