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remove unused/unmaintained code
[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
a2b8c5a5 12#include "../cpu/debug.h"\r
83bd0b76 13#include "../unzip/unzip.h"\r
14#include "../unzip/unzip_stream.h"\r
15\r
7336a99a 16\r
b081408f 17static int rom_alloc_size;\r
3e49ffd0 18static const char *rom_exts[] = { "bin", "gen", "smd", "iso", "sms", "gg", "sg" };\r
83bd0b76 19\r
45f2f245 20void (*PicoCartUnloadHook)(void);\r
21void (*PicoCartMemSetup)(void);\r
e807ac75 22\r
a9b3ffd3 23void (*PicoCartLoadProgressCB)(int percent) = NULL;\r
b2451ac6 24void (*PicoCDLoadProgressCB)(const char *fname, int percent) = NULL; // handled in Pico/cd/cd_file.c\r
a9b3ffd3 25\r
ae87bffa 26static void PicoCartDetect(const char *carthw_cfg);\r
d6114368 27\r
71de3cd9 28/* cso struct */\r
29typedef struct _cso_struct\r
30{\r
31 unsigned char in_buff[2*2048];\r
32 unsigned char out_buff[2048];\r
33 struct {\r
34 char magic[4];\r
35 unsigned int unused;\r
36 unsigned int total_bytes;\r
37 unsigned int total_bytes_high; // ignored here\r
38 unsigned int block_size; // 10h\r
39 unsigned char ver;\r
40 unsigned char align;\r
41 unsigned char reserved[2];\r
42 } header;\r
43 unsigned int fpos_in; // input file read pointer\r
44 unsigned int fpos_out; // pos in virtual decompressed file\r
45 int block_in_buff; // block which we have read in in_buff\r
46 int pad;\r
47 int index[0];\r
48}\r
49cso_struct;\r
50\r
51static int uncompress2(void *dest, int destLen, void *source, int sourceLen)\r
52{\r
53 z_stream stream;\r
54 int err;\r
55\r
56 stream.next_in = (Bytef*)source;\r
57 stream.avail_in = (uInt)sourceLen;\r
58 stream.next_out = dest;\r
59 stream.avail_out = (uInt)destLen;\r
60\r
61 stream.zalloc = NULL;\r
62 stream.zfree = NULL;\r
63\r
64 err = inflateInit2(&stream, -15);\r
65 if (err != Z_OK) return err;\r
66\r
67 err = inflate(&stream, Z_FINISH);\r
68 if (err != Z_STREAM_END) {\r
69 inflateEnd(&stream);\r
70 return err;\r
71 }\r
72 //*destLen = stream.total_out;\r
73\r
74 return inflateEnd(&stream);\r
75}\r
83bd0b76 76\r
87b0845f 77static const char *get_ext(const char *path)\r
78{\r
79 const char *ext;\r
80 if (strlen(path) < 4)\r
81 return ""; // no ext\r
82\r
83 // allow 2 or 3 char extensions for now\r
84 ext = path + strlen(path) - 2;\r
85 if (ext[-1] != '.') ext--;\r
86 if (ext[-1] != '.')\r
87 return "";\r
88 return ext;\r
89}\r
90\r
83bd0b76 91pm_file *pm_open(const char *path)\r
92{\r
93 pm_file *file = NULL;\r
94 const char *ext;\r
95 FILE *f;\r
96\r
87b0845f 97 if (path == NULL)\r
98 return NULL;\r
83bd0b76 99\r
87b0845f 100 ext = get_ext(path);\r
101 if (strcasecmp(ext, "zip") == 0)\r
83bd0b76 102 {\r
103 struct zipent *zipentry;\r
104 gzFile gzf = NULL;\r
105 ZIP *zipfile;\r
106 int i;\r
107\r
108 zipfile = openzip(path);\r
83bd0b76 109 if (zipfile != NULL)\r
110 {\r
111 /* search for suitable file (right extension or large enough file) */\r
112 while ((zipentry = readzip(zipfile)) != NULL)\r
113 {\r
87b0845f 114 ext = get_ext(zipentry->name);\r
83bd0b76 115\r
87b0845f 116 if (zipentry->uncompressed_size >= 32*1024)\r
117 goto found_rom_zip;\r
3e49ffd0 118\r
83bd0b76 119 for (i = 0; i < sizeof(rom_exts)/sizeof(rom_exts[0]); i++)\r
87b0845f 120 if (strcasecmp(ext, rom_exts[i]) == 0)\r
121 goto found_rom_zip;\r
83bd0b76 122 }\r
123\r
124 /* zipfile given, but nothing found suitable for us inside */\r
125 goto zip_failed;\r
126\r
127found_rom_zip:\r
128 /* try to convert to gzip stream, so we could use standard gzio functions from zlib */\r
129 gzf = zip2gz(zipfile, zipentry);\r
130 if (gzf == NULL) goto zip_failed;\r
131\r
87b0845f 132 file = calloc(1, sizeof(*file));\r
83bd0b76 133 if (file == NULL) goto zip_failed;\r
134 file->file = zipfile;\r
135 file->param = gzf;\r
136 file->size = zipentry->uncompressed_size;\r
137 file->type = PMT_ZIP;\r
87b0845f 138 strncpy(file->ext, ext, sizeof(file->ext) - 1);\r
83bd0b76 139 return file;\r
140\r
141zip_failed:\r
142 if (gzf) {\r
143 gzclose(gzf);\r
144 zipfile->fp = NULL; // gzclose() closed it\r
145 }\r
146 closezip(zipfile);\r
147 return NULL;\r
148 }\r
149 }\r
87b0845f 150 else if (strcasecmp(ext, "cso") == 0)\r
71de3cd9 151 {\r
152 cso_struct *cso = NULL, *tmp = NULL;\r
153 int size;\r
154 f = fopen(path, "rb");\r
155 if (f == NULL)\r
156 goto cso_failed;\r
157\r
f8af9634 158#ifndef __EPOC32__\r
2d2247c2 159 /* we use our own buffering */\r
160 setvbuf(f, NULL, _IONBF, 0);\r
f8af9634 161#endif\r
2d2247c2 162\r
71de3cd9 163 cso = malloc(sizeof(*cso));\r
164 if (cso == NULL)\r
165 goto cso_failed;\r
166\r
167 if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header))\r
168 goto cso_failed;\r
169\r
170 if (strncmp(cso->header.magic, "CISO", 4) != 0) {\r
171 elprintf(EL_STATUS, "cso: bad header");\r
172 goto cso_failed;\r
173 }\r
174\r
175 if (cso->header.block_size != 2048) {\r
176 elprintf(EL_STATUS, "cso: bad block size (%u)", cso->header.block_size);\r
177 goto cso_failed;\r
178 }\r
179\r
180 size = ((cso->header.total_bytes >> 11) + 1)*4 + sizeof(*cso);\r
181 tmp = realloc(cso, size);\r
182 if (tmp == NULL)\r
183 goto cso_failed;\r
184 cso = tmp;\r
185 elprintf(EL_STATUS, "allocated %i bytes for CSO struct", size);\r
186\r
187 size -= sizeof(*cso); // index size\r
188 if (fread(cso->index, 1, size, f) != size) {\r
189 elprintf(EL_STATUS, "cso: premature EOF");\r
190 goto cso_failed;\r
191 }\r
192\r
193 // all ok\r
194 cso->fpos_in = ftell(f);\r
195 cso->fpos_out = 0;\r
196 cso->block_in_buff = -1;\r
87b0845f 197 file = calloc(1, sizeof(*file));\r
71de3cd9 198 if (file == NULL) goto cso_failed;\r
199 file->file = f;\r
200 file->param = cso;\r
201 file->size = cso->header.total_bytes;\r
202 file->type = PMT_CSO;\r
203 return file;\r
204\r
205cso_failed:\r
206 if (cso != NULL) free(cso);\r
207 if (f != NULL) fclose(f);\r
208 return NULL;\r
209 }\r
83bd0b76 210\r
211 /* not a zip, treat as uncompressed file */\r
212 f = fopen(path, "rb");\r
213 if (f == NULL) return NULL;\r
214\r
87b0845f 215 file = calloc(1, sizeof(*file));\r
83bd0b76 216 if (file == NULL) {\r
217 fclose(f);\r
218 return NULL;\r
219 }\r
220 fseek(f, 0, SEEK_END);\r
221 file->file = f;\r
222 file->param = NULL;\r
223 file->size = ftell(f);\r
224 file->type = PMT_UNCOMPRESSED;\r
87b0845f 225 strncpy(file->ext, ext, sizeof(file->ext) - 1);\r
83bd0b76 226 fseek(f, 0, SEEK_SET);\r
d6114368 227\r
f8af9634 228#ifndef __EPOC32__ // makes things worse on Symbian\r
229 if (file->size > 0x400000)\r
230 /* we use our own buffering */\r
231 setvbuf(f, NULL, _IONBF, 0);\r
232#endif\r
233\r
83bd0b76 234 return file;\r
235}\r
236\r
237size_t pm_read(void *ptr, size_t bytes, pm_file *stream)\r
238{\r
239 int ret;\r
240\r
241 if (stream->type == PMT_UNCOMPRESSED)\r
242 {\r
243 ret = fread(ptr, 1, bytes, stream->file);\r
244 }\r
245 else if (stream->type == PMT_ZIP)\r
246 {\r
247 gzFile gf = stream->param;\r
248 int err;\r
249 ret = gzread(gf, ptr, bytes);\r
250 err = gzerror2(gf);\r
251 if (ret > 0 && (err == Z_DATA_ERROR || err == Z_STREAM_END))\r
252 /* we must reset stream pointer or else next seek/read fails */\r
253 gzrewind(gf);\r
254 }\r
71de3cd9 255 else if (stream->type == PMT_CSO)\r
256 {\r
257 cso_struct *cso = stream->param;\r
258 int read_pos, read_len, out_offs, rret;\r
259 int block = cso->fpos_out >> 11;\r
260 int index = cso->index[block];\r
261 int index_end = cso->index[block+1];\r
262 unsigned char *out = ptr, *tmp_dst;\r
263\r
264 ret = 0;\r
265 while (bytes != 0)\r
266 {\r
267 out_offs = cso->fpos_out&0x7ff;\r
268 if (out_offs == 0 && bytes >= 2048)\r
269 tmp_dst = out;\r
270 else tmp_dst = cso->out_buff;\r
271\r
272 read_pos = (index&0x7fffffff) << cso->header.align;\r
273\r
274 if (index < 0) {\r
275 if (read_pos != cso->fpos_in)\r
276 fseek(stream->file, read_pos, SEEK_SET);\r
277 rret = fread(tmp_dst, 1, 2048, stream->file);\r
278 cso->fpos_in = read_pos + rret;\r
279 if (rret != 2048) break;\r
280 } else {\r
281 read_len = (((index_end&0x7fffffff) << cso->header.align) - read_pos) & 0xfff;\r
282 if (block != cso->block_in_buff)\r
283 {\r
284 if (read_pos != cso->fpos_in)\r
ff6b7429 285 fseek(stream->file, read_pos, SEEK_SET);\r
71de3cd9 286 rret = fread(cso->in_buff, 1, read_len, stream->file);\r
287 cso->fpos_in = read_pos + rret;\r
288 if (rret != read_len) {\r
289 elprintf(EL_STATUS, "cso: read failed @ %08x", read_pos);\r
290 break;\r
291 }\r
292 cso->block_in_buff = block;\r
293 }\r
294 rret = uncompress2(tmp_dst, 2048, cso->in_buff, read_len);\r
295 if (rret != 0) {\r
296 elprintf(EL_STATUS, "cso: uncompress failed @ %08x with %i", read_pos, rret);\r
297 break;\r
298 }\r
299 }\r
300\r
301 rret = 2048;\r
302 if (out_offs != 0 || bytes < 2048) {\r
303 //elprintf(EL_STATUS, "cso: unaligned/nonfull @ %08x, offs=%i, len=%u", cso->fpos_out, out_offs, bytes);\r
304 if (bytes < rret) rret = bytes;\r
305 if (2048 - out_offs < rret) rret = 2048 - out_offs;\r
306 memcpy(out, tmp_dst + out_offs, rret);\r
307 }\r
308 ret += rret;\r
309 out += rret;\r
310 cso->fpos_out += rret;\r
311 bytes -= rret;\r
312 block++;\r
313 index = index_end;\r
314 index_end = cso->index[block+1];\r
315 }\r
316 }\r
83bd0b76 317 else\r
318 ret = 0;\r
319\r
320 return ret;\r
321}\r
322\r
323int pm_seek(pm_file *stream, long offset, int whence)\r
324{\r
325 if (stream->type == PMT_UNCOMPRESSED)\r
326 {\r
7336a99a 327 fseek(stream->file, offset, whence);\r
328 return ftell(stream->file);\r
83bd0b76 329 }\r
330 else if (stream->type == PMT_ZIP)\r
331 {\r
66fdc0f0 332 if (PicoMessage != NULL && offset > 6*1024*1024) {\r
333 long pos = gztell((gzFile) stream->param);\r
334 if (offset < pos || offset - pos > 6*1024*1024)\r
335 PicoMessage("Decompressing data...");\r
336 }\r
83bd0b76 337 return gzseek((gzFile) stream->param, offset, whence);\r
338 }\r
71de3cd9 339 else if (stream->type == PMT_CSO)\r
340 {\r
341 cso_struct *cso = stream->param;\r
342 switch (whence)\r
343 {\r
344 case SEEK_CUR: cso->fpos_out += offset; break;\r
345 case SEEK_SET: cso->fpos_out = offset; break;\r
346 case SEEK_END: cso->fpos_out = cso->header.total_bytes - offset; break;\r
347 }\r
348 return cso->fpos_out;\r
349 }\r
83bd0b76 350 else\r
351 return -1;\r
352}\r
353\r
354int pm_close(pm_file *fp)\r
355{\r
356 int ret = 0;\r
357\r
358 if (fp == NULL) return EOF;\r
359\r
360 if (fp->type == PMT_UNCOMPRESSED)\r
361 {\r
362 fclose(fp->file);\r
363 }\r
364 else if (fp->type == PMT_ZIP)\r
365 {\r
366 ZIP *zipfile = fp->file;\r
367 gzclose((gzFile) fp->param);\r
368 zipfile->fp = NULL; // gzclose() closed it\r
369 closezip(zipfile);\r
370 }\r
71de3cd9 371 else if (fp->type == PMT_CSO)\r
372 {\r
373 free(fp->param);\r
374 fclose(fp->file);\r
375 }\r
83bd0b76 376 else\r
377 ret = EOF;\r
378\r
379 free(fp);\r
380 return ret;\r
381}\r
382\r
83ff19ec 383// byteswap, data needs to be int aligned, src can match dst\r
384void Byteswap(void *dst, const void *src, int len)\r
cc68a136 385{\r
83ff19ec 386 const unsigned int *ps = src;\r
387 unsigned int *pd = dst;\r
388 int i, m;\r
cc68a136 389\r
83ff19ec 390 if (len < 2)\r
391 return;\r
cc68a136 392\r
83ff19ec 393 m = 0x00ff00ff;\r
394 for (i = 0; i < len / 4; i++) {\r
395 unsigned int t = ps[i];\r
396 pd[i] = ((t & m) << 8) | ((t & ~m) >> 8);\r
cc68a136 397 }\r
cc68a136 398}\r
399\r
400// Interleve a 16k block and byteswap\r
401static int InterleveBlock(unsigned char *dest,unsigned char *src)\r
402{\r
403 int i=0;\r
404 for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd\r
405 for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even\r
406 return 0;\r
407}\r
408\r
409// Decode a SMD file\r
410static int DecodeSmd(unsigned char *data,int len)\r
411{\r
412 unsigned char *temp=NULL;\r
413 int i=0;\r
414\r
415 temp=(unsigned char *)malloc(0x4000);\r
416 if (temp==NULL) return 1;\r
417 memset(temp,0,0x4000);\r
418\r
419 // Interleve each 16k block and shift down by 0x200:\r
420 for (i=0; i+0x4200<=len; i+=0x4000)\r
421 {\r
422 InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer\r
423 memcpy(data+i,temp,0x4000); // Copy back in\r
424 }\r
425\r
426 free(temp);\r
427 return 0;\r
428}\r
429\r
87b0845f 430static unsigned char *PicoCartAlloc(int filesize, int is_sms)\r
cc68a136 431{\r
cc68a136 432 unsigned char *rom;\r
433\r
87b0845f 434 if (is_sms) {\r
435 // make size power of 2 for easier banking handling\r
436 int s = 0, tmp = filesize;\r
437 while ((tmp >>= 1) != 0)\r
438 s++;\r
439 if (filesize > (1 << s))\r
440 s++;\r
b081408f 441 rom_alloc_size = 1 << s;\r
b4db550e 442 // be sure we can cover all address space\r
443 if (rom_alloc_size < 0x10000)\r
444 rom_alloc_size = 0x10000;\r
87b0845f 445 }\r
446 else {\r
b081408f 447 // make alloc size at least sizeof(mcd_state),\r
448 // in case we want to switch to CD mode\r
449 if (filesize < sizeof(mcd_state))\r
450 filesize = sizeof(mcd_state);\r
451\r
87b0845f 452 // align to 512K for memhandlers\r
b081408f 453 rom_alloc_size = (filesize + 0x7ffff) & ~0x7ffff;\r
87b0845f 454 }\r
cc68a136 455\r
b081408f 456 if (rom_alloc_size - filesize < 4)\r
457 rom_alloc_size += 4; // padding for out-of-bound exec protection\r
cc68a136 458\r
459 // Allocate space for the rom plus padding\r
b081408f 460 // use special address for 32x dynarec\r
e743be20 461 rom = plat_mmap(0x02000000, rom_alloc_size, 0, 0);\r
cc68a136 462 return rom;\r
463}\r
464\r
3e49ffd0 465int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms)\r
cc68a136 466{\r
87b0845f 467 unsigned char *rom;\r
468 int size, bytes_read;\r
cc68a136 469\r
87b0845f 470 if (f == NULL)\r
471 return 1;\r
472\r
473 size = f->size;\r
cc68a136 474 if (size <= 0) return 1;\r
87b0845f 475 size = (size+3)&~3; // Round up to a multiple of 4\r
cc68a136 476\r
477 // Allocate space for the rom plus padding\r
87b0845f 478 rom = PicoCartAlloc(size, is_sms);\r
479 if (rom == NULL) {\r
c6196c0f 480 elprintf(EL_STATUS, "out of memory (wanted %i)", size);\r
f8af9634 481 return 2;\r
7336a99a 482 }\r
cc68a136 483\r
a9b3ffd3 484 if (PicoCartLoadProgressCB != NULL)\r
485 {\r
486 // read ROM in blocks, just for fun\r
487 int ret;\r
488 unsigned char *p = rom;\r
489 bytes_read=0;\r
490 do\r
491 {\r
492 int todo = size - bytes_read;\r
493 if (todo > 256*1024) todo = 256*1024;\r
494 ret = pm_read(p,todo,f);\r
495 bytes_read += ret;\r
496 p += ret;\r
497 PicoCartLoadProgressCB(bytes_read * 100 / size);\r
498 }\r
499 while (ret > 0);\r
500 }\r
501 else\r
502 bytes_read = pm_read(rom,size,f); // Load up the rom\r
503 if (bytes_read <= 0) {\r
c6196c0f 504 elprintf(EL_STATUS, "read failed");\r
a9b3ffd3 505 free(rom);\r
f8af9634 506 return 3;\r
a9b3ffd3 507 }\r
bf098bc5 508\r
3e49ffd0 509 if (!is_sms)\r
510 {\r
511 // maybe we are loading MegaCD BIOS?\r
512 if (!(PicoAHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) ||\r
513 !strncmp((char *)rom+0x128, "BOOT", 4))) {\r
514 PicoAHW |= PAHW_MCD;\r
3e49ffd0 515 }\r
cc68a136 516\r
3e49ffd0 517 // Check for SMD:\r
87b0845f 518 if (size >= 0x4200 && (size&0x3fff) == 0x200 &&\r
3e49ffd0 519 ((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) {\r
87b0845f 520 elprintf(EL_STATUS, "SMD format detected.");\r
3e49ffd0 521 DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD\r
522 }\r
83ff19ec 523 else Byteswap(rom, rom, size); // Just byteswap\r
21395e38 524 }\r
87b0845f 525 else\r
526 {\r
527 if (size >= 0x4200 && (size&0x3fff) == 0x200) {\r
528 elprintf(EL_STATUS, "SMD format detected.");\r
529 // at least here it's not interleaved\r
530 size -= 0x200;\r
531 memmove(rom, rom + 0x200, size);\r
532 }\r
533 }\r
cc68a136 534\r
87b0845f 535 if (prom) *prom = rom;\r
536 if (psize) *psize = size;\r
cc68a136 537\r
538 return 0;\r
539}\r
540\r
f8ef8ff7 541// Insert a cartridge:\r
ae87bffa 542int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_cfg)\r
cc68a136 543{\r
544 // notaz: add a 68k "jump one op back" opcode to the end of ROM.\r
545 // This will hang the emu, but will prevent nasty crashes.\r
546 // note: 4 bytes are padded to every ROM\r
d6114368 547 if (rom != NULL)\r
cc68a136 548 *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped\r
549\r
cc68a136 550 Pico.rom=rom;\r
551 Pico.romsize=romsize;\r
552\r
d6114368 553 if (SRam.data) {\r
554 free(SRam.data);\r
555 SRam.data = NULL;\r
556 }\r
557\r
e807ac75 558 if (PicoCartUnloadHook != NULL) {\r
559 PicoCartUnloadHook();\r
560 PicoCartUnloadHook = NULL;\r
561 }\r
a2b8c5a5 562 pdb_cleanup();\r
e807ac75 563\r
3e49ffd0 564 PicoAHW &= PAHW_MCD|PAHW_SMS;\r
602133e1 565\r
45f2f245 566 PicoCartMemSetup = NULL;\r
f8ef8ff7 567 PicoDmaHook = NULL;\r
568 PicoResetHook = NULL;\r
017512f2 569 PicoLineHook = NULL;\r
fad24893 570 PicoLoadStateHook = NULL;\r
945c2fdc 571 carthw_chunks = NULL;\r
f8ef8ff7 572\r
3e49ffd0 573 if (!(PicoAHW & (PAHW_MCD|PAHW_SMS)))\r
ae87bffa 574 PicoCartDetect(carthw_cfg);\r
f8ef8ff7 575\r
1dceadae 576 // setup correct memory map for loaded ROM\r
9037e45d 577 switch (PicoAHW) {\r
578 default:\r
579 elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoAHW);\r
580 case 0:\r
581 case PAHW_SVP: PicoMemSetup(); break;\r
582 case PAHW_MCD: PicoMemSetupCD(); break;\r
583 case PAHW_PICO: PicoMemSetupPico(); break;\r
3e49ffd0 584 case PAHW_SMS: PicoMemSetupMS(); break;\r
9037e45d 585 }\r
1dceadae 586\r
45f2f245 587 if (PicoCartMemSetup != NULL)\r
588 PicoCartMemSetup();\r
589\r
3e49ffd0 590 if (PicoAHW & PAHW_SMS)\r
591 PicoPowerMS();\r
592 else\r
593 PicoPower();\r
594\r
1cb1584b 595 return 0;\r
cc68a136 596}\r
597\r
a736af3e 598int PicoCartResize(int newsize)\r
599{\r
600 void *tmp = plat_mremap(Pico.rom, rom_alloc_size, newsize);\r
601 if (tmp == NULL)\r
602 return -1;\r
603\r
604 Pico.rom = tmp;\r
605 rom_alloc_size = newsize;\r
606 return 0;\r
607}\r
608\r
2aa27095 609void PicoCartUnload(void)\r
cc68a136 610{\r
3e49ffd0 611 if (PicoCartUnloadHook != NULL) {\r
612 PicoCartUnloadHook();\r
613 PicoCartUnloadHook = NULL;\r
614 }\r
615\r
5e49c3a8 616 if (PicoAHW & PAHW_32X)\r
617 PicoUnload32x();\r
618\r
a12b1b29 619 if (Pico.rom != NULL) {\r
053fd9b4 620 SekFinishIdleDet();\r
b081408f 621 plat_munmap(Pico.rom, rom_alloc_size);\r
622 Pico.rom = NULL;\r
a12b1b29 623 }\r
cc68a136 624}\r
625\r
000f5335 626static unsigned int rom_crc32(void)\r
627{\r
628 unsigned int crc;\r
629 elprintf(EL_STATUS, "caclulating CRC32..");\r
630\r
631 // have to unbyteswap for calculation..\r
83ff19ec 632 Byteswap(Pico.rom, Pico.rom, Pico.romsize);\r
000f5335 633 crc = crc32(0, Pico.rom, Pico.romsize);\r
83ff19ec 634 Byteswap(Pico.rom, Pico.rom, Pico.romsize);\r
000f5335 635 return crc;\r
636}\r
637\r
1f4e9f14 638static int rom_strcmp(int rom_offset, const char *s1)\r
1dceadae 639{\r
1f4e9f14 640 int i, len = strlen(s1);\r
45f2f245 641 const char *s_rom = (const char *)Pico.rom;\r
1dceadae 642 for (i = 0; i < len; i++)\r
45f2f245 643 if (s1[i] != s_rom[(i + rom_offset) ^ 1])\r
1dceadae 644 return 1;\r
645 return 0;\r
646}\r
647\r
af37bca8 648static unsigned int rom_read32(int addr)\r
649{\r
650 unsigned short *m = (unsigned short *)(Pico.rom + addr);\r
651 return (m[0] << 16) | m[1];\r
652}\r
653\r
45f2f245 654static char *sskip(char *s)\r
655{\r
656 while (*s && isspace_(*s))\r
657 s++;\r
658 return s;\r
659}\r
660\r
661static void rstrip(char *s)\r
662{\r
663 char *p;\r
664 for (p = s + strlen(s) - 1; p >= s; p--)\r
665 if (isspace_(*p))\r
666 *p = 0;\r
667}\r
668\r
000f5335 669static int parse_3_vals(char *p, int *val0, int *val1, int *val2)\r
670{\r
671 char *r;\r
672 *val0 = strtoul(p, &r, 0);\r
673 if (r == p)\r
674 goto bad;\r
675 p = sskip(r);\r
676 if (*p++ != ',')\r
677 goto bad;\r
678 *val1 = strtoul(p, &r, 0);\r
679 if (r == p)\r
680 goto bad;\r
681 p = sskip(r);\r
682 if (*p++ != ',')\r
683 goto bad;\r
684 *val2 = strtoul(p, &r, 0);\r
685 if (r == p)\r
686 goto bad;\r
687\r
688 return 1;\r
689bad:\r
690 return 0;\r
691}\r
692\r
45f2f245 693static int is_expr(const char *expr, char **pr)\r
694{\r
695 int len = strlen(expr);\r
696 char *p = *pr;\r
697\r
698 if (strncmp(expr, p, len) != 0)\r
699 return 0;\r
700 p = sskip(p + len);\r
701 if (*p != '=')\r
702 return 0; // wrong or malformed\r
703\r
704 *pr = sskip(p + 1);\r
705 return 1;\r
706}\r
707\r
ae87bffa 708static void parse_carthw(const char *carthw_cfg, int *fill_sram)\r
45f2f245 709{\r
710 int line = 0, any_checks_passed = 0, skip_sect = 0;\r
000f5335 711 int tmp, rom_crc = 0;\r
45f2f245 712 char buff[256], *p, *r;\r
713 FILE *f;\r
714\r
ae87bffa 715 f = fopen(carthw_cfg, "r");\r
45f2f245 716 if (f == NULL) {\r
ae87bffa 717 elprintf(EL_STATUS, "couldn't open carthw.cfg!");\r
45f2f245 718 return;\r
719 }\r
720\r
721 while ((p = fgets(buff, sizeof(buff), f)))\r
722 {\r
723 line++;\r
724 p = sskip(p);\r
725 if (*p == 0 || *p == '#')\r
726 continue;\r
727\r
728 if (*p == '[') {\r
729 any_checks_passed = 0;\r
730 skip_sect = 0;\r
731 continue;\r
732 }\r
733 \r
734 if (skip_sect)\r
735 continue;\r
736\r
737 /* look for checks */\r
738 if (is_expr("check_str", &p))\r
739 {\r
740 int offs;\r
741 offs = strtoul(p, &r, 0);\r
742 if (offs < 0 || offs > Pico.romsize) {\r
743 elprintf(EL_STATUS, "carthw:%d: check_str offs out of range: %d\n", line, offs);\r
744 goto bad;\r
745 }\r
746 p = sskip(r);\r
747 if (*p != ',')\r
748 goto bad;\r
749 p = sskip(p + 1);\r
750 if (*p != '"')\r
751 goto bad;\r
752 p++;\r
753 r = strchr(p, '"');\r
754 if (r == NULL)\r
755 goto bad;\r
756 *r = 0;\r
757\r
758 if (rom_strcmp(offs, p) == 0)\r
759 any_checks_passed = 1;\r
760 else\r
761 skip_sect = 1;\r
762 continue;\r
763 }\r
764 else if (is_expr("check_size_gt", &p))\r
765 {\r
766 int size;\r
767 size = strtoul(p, &r, 0);\r
768 if (r == p || size < 0)\r
769 goto bad;\r
770\r
771 if (Pico.romsize > size)\r
772 any_checks_passed = 1;\r
773 else\r
774 skip_sect = 1;\r
775 continue;\r
776 }\r
777 else if (is_expr("check_csum", &p))\r
778 {\r
779 int csum;\r
780 csum = strtoul(p, &r, 0);\r
781 if (r == p || (csum & 0xffff0000))\r
782 goto bad;\r
783\r
784 if (csum == (rom_read32(0x18c) & 0xffff))\r
785 any_checks_passed = 1;\r
786 else\r
787 skip_sect = 1;\r
788 continue;\r
789 }\r
000f5335 790 else if (is_expr("check_crc32", &p))\r
791 {\r
792 unsigned int crc;\r
793 crc = strtoul(p, &r, 0);\r
794 if (r == p)\r
795 goto bad;\r
796\r
797 if (rom_crc == 0)\r
798 rom_crc = rom_crc32();\r
799 if (crc == rom_crc)\r
800 any_checks_passed = 1;\r
801 else\r
802 skip_sect = 1;\r
803 continue;\r
804 }\r
45f2f245 805\r
806 /* now time for actions */\r
807 if (is_expr("hw", &p)) {\r
808 if (!any_checks_passed)\r
809 goto no_checks;\r
810 rstrip(p);\r
811\r
812 if (strcmp(p, "svp") == 0)\r
813 PicoSVPStartup();\r
814 else if (strcmp(p, "pico") == 0)\r
815 PicoInitPico();\r
000f5335 816 else if (strcmp(p, "prot") == 0)\r
817 carthw_sprot_startup();\r
818 else if (strcmp(p, "ssf2_mapper") == 0)\r
819 carthw_ssf2_startup();\r
45f2f245 820 else if (strcmp(p, "x_in_1_mapper") == 0)\r
821 carthw_Xin1_startup();\r
822 else if (strcmp(p, "realtec_mapper") == 0)\r
823 carthw_realtec_startup();\r
824 else if (strcmp(p, "radica_mapper") == 0)\r
825 carthw_radica_startup();\r
000f5335 826 else if (strcmp(p, "prot_lk3") == 0)\r
827 carthw_prot_lk3_startup();\r
45f2f245 828 else {\r
829 elprintf(EL_STATUS, "carthw:%d: unsupported mapper: %s", line, p);\r
830 skip_sect = 1;\r
831 }\r
832 continue;\r
833 }\r
834 if (is_expr("sram_range", &p)) {\r
835 int start, end;\r
836\r
837 if (!any_checks_passed)\r
838 goto no_checks;\r
839 rstrip(p);\r
840\r
841 start = strtoul(p, &r, 0);\r
842 if (r == p)\r
843 goto bad;\r
844 p = sskip(r);\r
845 if (*p != ',')\r
846 goto bad;\r
847 p = sskip(p + 1);\r
848 end = strtoul(p, &r, 0);\r
849 if (r == p)\r
850 goto bad;\r
851 if (((start | end) & 0xff000000) || start > end) {\r
852 elprintf(EL_STATUS, "carthw:%d: bad sram_range: %08x - %08x", line, start, end);\r
853 goto bad_nomsg;\r
854 }\r
855 SRam.start = start;\r
856 SRam.end = end;\r
857 continue;\r
858 }\r
859 else if (is_expr("prop", &p)) {\r
860 if (!any_checks_passed)\r
861 goto no_checks;\r
862 rstrip(p);\r
863\r
864 if (strcmp(p, "no_sram") == 0)\r
865 SRam.flags &= ~SRF_ENABLED;\r
866 else if (strcmp(p, "no_eeprom") == 0)\r
867 SRam.flags &= ~SRF_EEPROM;\r
868 else if (strcmp(p, "filled_sram") == 0)\r
869 *fill_sram = 1;\r
870 else {\r
871 elprintf(EL_STATUS, "carthw:%d: unsupported prop: %s", line, p);\r
872 goto bad_nomsg;\r
873 }\r
874 continue;\r
875 }\r
876 else if (is_expr("eeprom_type", &p)) {\r
877 int type;\r
878 if (!any_checks_passed)\r
879 goto no_checks;\r
880 rstrip(p);\r
881\r
882 type = strtoul(p, &r, 0);\r
883 if (r == p || type < 0)\r
884 goto bad;\r
885 SRam.eeprom_type = type;\r
886 SRam.flags |= SRF_EEPROM;\r
887 continue;\r
888 }\r
889 else if (is_expr("eeprom_lines", &p)) {\r
890 int scl, sda_in, sda_out;\r
891 if (!any_checks_passed)\r
892 goto no_checks;\r
893 rstrip(p);\r
894\r
000f5335 895 if (!parse_3_vals(p, &scl, &sda_in, &sda_out))\r
45f2f245 896 goto bad;\r
000f5335 897 if (scl < 0 || scl > 15 || sda_in < 0 || sda_in > 15 ||\r
898 sda_out < 0 || sda_out > 15)\r
45f2f245 899 goto bad;\r
900\r
901 SRam.eeprom_bit_cl = scl;\r
902 SRam.eeprom_bit_in = sda_in;\r
903 SRam.eeprom_bit_out= sda_out;\r
904 continue;\r
905 }\r
000f5335 906 else if ((tmp = is_expr("prot_ro_value16", &p)) || is_expr("prot_rw_value16", &p)) {\r
907 int addr, mask, val;\r
908 if (!any_checks_passed)\r
909 goto no_checks;\r
910 rstrip(p);\r
911\r
912 if (!parse_3_vals(p, &addr, &mask, &val))\r
913 goto bad;\r
914\r
915 carthw_sprot_new_location(addr, mask, val, tmp ? 1 : 0);\r
916 continue;\r
917 }\r
45f2f245 918\r
919\r
920bad:\r
921 elprintf(EL_STATUS, "carthw:%d: unrecognized expression: %s", line, buff);\r
922bad_nomsg:\r
923 skip_sect = 1;\r
924 continue;\r
925\r
926no_checks:\r
927 elprintf(EL_STATUS, "carthw:%d: command without any checks before it: %s", line, buff);\r
928 skip_sect = 1;\r
929 continue;\r
930 }\r
931 fclose(f);\r
932}\r
933\r
a12b1b29 934/*\r
935 * various cart-specific things, which can't be handled by generic code\r
a12b1b29 936 */\r
ae87bffa 937static void PicoCartDetect(const char *carthw_cfg)\r
1dceadae 938{\r
000f5335 939 int fill_sram = 0;\r
1dceadae 940\r
45f2f245 941 memset(&SRam, 0, sizeof(SRam));\r
1dceadae 942 if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')\r
943 {\r
45f2f245 944 SRam.start = rom_read32(0x1B4) & ~0xff000001; // align\r
945 SRam.end = (rom_read32(0x1B8) & ~0xff000000) | 1;\r
1dceadae 946 if (Pico.rom[0x1B2] & 0x40)\r
1dceadae 947 // EEPROM\r
45f2f245 948 SRam.flags |= SRF_EEPROM;\r
949 SRam.flags |= SRF_ENABLED;\r
1dceadae 950 }\r
45f2f245 951 if (SRam.end == 0 || SRam.start > SRam.end)\r
1dceadae 952 {\r
953 // some games may have bad headers, like S&K and Sonic3\r
954 // note: majority games use 0x200000 as starting address, but there are some which\r
955 // use something else (0x300000 by HardBall '95). Luckily they have good headers.\r
956 SRam.start = 0x200000;\r
957 SRam.end = 0x203FFF;\r
45f2f245 958 SRam.flags |= SRF_ENABLED;\r
1dceadae 959 }\r
1dceadae 960\r
961 // set EEPROM defaults, in case it gets detected\r
962 SRam.eeprom_type = 0; // 7bit (24C01)\r
1dceadae 963 SRam.eeprom_bit_cl = 1;\r
964 SRam.eeprom_bit_in = 0;\r
965 SRam.eeprom_bit_out= 0;\r
966\r
ae87bffa 967 if (carthw_cfg != NULL)\r
968 parse_carthw(carthw_cfg, &fill_sram);\r
9037e45d 969\r
45f2f245 970 if (SRam.flags & SRF_ENABLED)\r
757f8dae 971 {\r
45f2f245 972 if (SRam.flags & SRF_EEPROM)\r
973 SRam.size = 0x2000;\r
974 else\r
975 SRam.size = SRam.end - SRam.start + 1;\r
757f8dae 976\r
45f2f245 977 SRam.data = calloc(SRam.size, 1);\r
978 if (SRam.data == NULL)\r
979 SRam.flags &= ~SRF_ENABLED;\r
a12b1b29 980\r
45f2f245 981 if (SRam.eeprom_type == 1) // 1 == 0 in PD EEPROM code\r
982 SRam.eeprom_type = 0;\r
0b35350d 983 }\r
984\r
45f2f245 985 if ((SRam.flags & SRF_ENABLED) && fill_sram)\r
757f8dae 986 {\r
45f2f245 987 elprintf(EL_STATUS, "SRAM fill");\r
988 memset(SRam.data, 0xff, SRam.size);\r
757f8dae 989 }\r
1f4e9f14 990\r
991 // Unusual region 'code'\r
453d2a6e 992 if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)\r
45f2f245 993 *(int *) (Pico.rom + 0x1f0) = 0x20204520;\r
1dceadae 994}\r
995\r
fast MegaDrive/MegaCD/32X emulator