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Diffstat (limited to 'src/emu/romload.h')
-rw-r--r-- | src/emu/romload.h | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/src/emu/romload.h b/src/emu/romload.h new file mode 100644 index 00000000000..3f1598bd8f6 --- /dev/null +++ b/src/emu/romload.h @@ -0,0 +1,300 @@ +/********************************************************************* + + romload.h + + ROM loading functions. + + Copyright (c) 1996-2007, Nicola Salmoria and the MAME Team. + Visit http://mamedev.org for licensing and usage restrictions. + +*********************************************************************/ + +#pragma once + +#ifndef __ROMLOAD_H__ +#define __ROMLOAD_H__ + +#include "mamecore.h" +#include "chd.h" + + + +/*************************************************************************** + CONSTANTS +***************************************************************************/ + +/* ----- per-entry constants ----- */ +#define ROMENTRYTYPE_REGION 1 /* this entry marks the start of a region */ +#define ROMENTRYTYPE_END 2 /* this entry marks the end of a region */ +#define ROMENTRYTYPE_RELOAD 3 /* this entry reloads the previous ROM */ +#define ROMENTRYTYPE_CONTINUE 4 /* this entry continues loading the previous ROM */ +#define ROMENTRYTYPE_FILL 5 /* this entry fills an area with a constant value */ +#define ROMENTRYTYPE_COPY 6 /* this entry copies data from another region/offset */ +#define ROMENTRYTYPE_CARTRIDGE 7 /* this entry specifies a cartridge (MESS) */ +#define ROMENTRYTYPE_IGNORE 8 /* this entry continues loading the previous ROM but throws the data away */ +#define ROMENTRYTYPE_SYSTEM_BIOS 9 /* this entry specifies a bios */ +#define ROMENTRYTYPE_COUNT 10 + + +/* ----- per-region constants ----- */ +#define ROMREGION_WIDTHMASK 0x00000003 /* native width of region, as power of 2 */ +#define ROMREGION_8BIT 0x00000000 /* (non-CPU regions only) */ +#define ROMREGION_16BIT 0x00000001 +#define ROMREGION_32BIT 0x00000002 +#define ROMREGION_64BIT 0x00000003 + +#define ROMREGION_ENDIANMASK 0x00000004 /* endianness of the region */ +#define ROMREGION_LE 0x00000000 /* (non-CPU regions only) */ +#define ROMREGION_BE 0x00000004 + +#define ROMREGION_INVERTMASK 0x00000008 /* invert the bits of the region */ +#define ROMREGION_NOINVERT 0x00000000 +#define ROMREGION_INVERT 0x00000008 + +#define ROMREGION_DISPOSEMASK 0x00000010 /* dispose of the region after init */ +#define ROMREGION_NODISPOSE 0x00000000 +#define ROMREGION_DISPOSE 0x00000010 + +#define ROMREGION_LOADUPPERMASK 0x00000040 /* load into the upper part of CPU space */ +#define ROMREGION_LOADLOWER 0x00000000 /* (CPU regions only) */ +#define ROMREGION_LOADUPPER 0x00000040 + +#define ROMREGION_ERASEMASK 0x00000080 /* erase the region before loading */ +#define ROMREGION_NOERASE 0x00000000 +#define ROMREGION_ERASE 0x00000080 + +#define ROMREGION_ERASEVALMASK 0x0000ff00 /* value to erase the region to */ +#define ROMREGION_ERASEVAL(x) ((((x) & 0xff) << 8) | ROMREGION_ERASE) +#define ROMREGION_ERASE00 ROMREGION_ERASEVAL(0) +#define ROMREGION_ERASEFF ROMREGION_ERASEVAL(0xff) + +#define ROMREGION_DATATYPEMASK 0x00010000 /* inherit all flags from previous definition */ +#define ROMREGION_DATATYPEROM 0x00000000 +#define ROMREGION_DATATYPEDISK 0x00010000 + + +/* ----- per-ROM constants ----- */ +#define DISK_READONLYMASK 0x00000400 /* is the disk read-only? */ +#define DISK_READWRITE 0x00000000 +#define DISK_READONLY 0x00000400 + +#define ROM_OPTIONALMASK 0x00000800 /* optional - won't hurt if it's not there */ +#define ROM_REQUIRED 0x00000000 +#define ROM_OPTIONAL 0x00000800 + +#define ROM_GROUPMASK 0x0000f000 /* load data in groups of this size + 1 */ +#define ROM_GROUPSIZE(n) ((((n) - 1) & 15) << 12) +#define ROM_GROUPBYTE ROM_GROUPSIZE(1) +#define ROM_GROUPWORD ROM_GROUPSIZE(2) +#define ROM_GROUPDWORD ROM_GROUPSIZE(4) + +#define ROM_SKIPMASK 0x000f0000 /* skip this many bytes after each group */ +#define ROM_SKIP(n) (((n) & 15) << 16) +#define ROM_NOSKIP ROM_SKIP(0) + +#define ROM_REVERSEMASK 0x00100000 /* reverse the byte order within a group */ +#define ROM_NOREVERSE 0x00000000 +#define ROM_REVERSE 0x00100000 + +#define ROM_BITWIDTHMASK 0x00e00000 /* width of data in bits */ +#define ROM_BITWIDTH(n) (((n) & 7) << 21) +#define ROM_NIBBLE ROM_BITWIDTH(4) +#define ROM_FULLBYTE ROM_BITWIDTH(8) + +#define ROM_BITSHIFTMASK 0x07000000 /* left-shift count for the bits */ +#define ROM_BITSHIFT(n) (((n) & 7) << 24) +#define ROM_NOSHIFT ROM_BITSHIFT(0) +#define ROM_SHIFT_NIBBLE_LO ROM_BITSHIFT(0) +#define ROM_SHIFT_NIBBLE_HI ROM_BITSHIFT(4) + +#define ROM_INHERITFLAGSMASK 0x08000000 /* inherit all flags from previous definition */ +#define ROM_INHERITFLAGS 0x08000000 + +#define ROM_BIOSFLAGSMASK 0xf0000000 /* only loaded if value matches global bios value */ +#define ROM_BIOS(n) (((n) & 15) << 28) + +#define ROM_INHERITEDFLAGS (ROM_GROUPMASK | ROM_SKIPMASK | ROM_REVERSEMASK | ROM_BITWIDTHMASK | ROM_BITSHIFTMASK | ROM_BIOSFLAGSMASK) + + + +/*************************************************************************** + TYPE DEFINITIONS +***************************************************************************/ + +typedef struct _rom_entry rom_entry; +struct _rom_entry +{ + const char * _name; /* name of the file to load */ + UINT32 _offset; /* offset to load it to */ + UINT32 _length; /* length of the file */ + UINT32 _flags; /* flags */ + const char * _hashdata; /* hashing informations (checksums) */ +}; + + +/* In mamecore.h: typedef struct _rom_load_data rom_load_data; */ +struct _rom_load_data +{ + int warnings; /* warning count during processing */ + int errors; /* error count during processing */ + + int romsloaded; /* current ROMs loaded count */ + int romstotal; /* total number of ROMs to read */ + + mame_file * file; /* current file */ + + UINT8 * regionbase; /* base of current region */ + UINT32 regionlength; /* length of current region */ + + char errorbuf[4096]; /* accumulated errors */ + UINT8 tempbuf[65536]; /* temporary buffer */ +}; + + + +/*************************************************************************** + MACROS +***************************************************************************/ + +/* ----- per-entry macros ----- */ +#define ROMENTRY_REGION ((const char *)ROMENTRYTYPE_REGION) +#define ROMENTRY_END ((const char *)ROMENTRYTYPE_END) +#define ROMENTRY_RELOAD ((const char *)ROMENTRYTYPE_RELOAD) +#define ROMENTRY_CONTINUE ((const char *)ROMENTRYTYPE_CONTINUE) +#define ROMENTRY_FILL ((const char *)ROMENTRYTYPE_FILL) +#define ROMENTRY_COPY ((const char *)ROMENTRYTYPE_COPY) +#define ROMENTRY_CARTRIDGE ((const char *)ROMENTRYTYPE_CARTRIDGE) +#define ROMENTRY_IGNORE ((const char *)ROMENTRYTYPE_IGNORE) +#define ROMENTRY_SYSTEM_BIOS ((const char *)ROMENTRYTYPE_SYSTEM_BIOS) + +#define ROMENTRY_GETTYPE(r) ((FPTR)(r)->_name) +#define ROMENTRY_ISSPECIAL(r) (ROMENTRY_GETTYPE(r) < ROMENTRYTYPE_COUNT) +#define ROMENTRY_ISFILE(r) (!ROMENTRY_ISSPECIAL(r)) +#define ROMENTRY_ISREGION(r) ((r)->_name == ROMENTRY_REGION) +#define ROMENTRY_ISEND(r) ((r)->_name == ROMENTRY_END) +#define ROMENTRY_ISRELOAD(r) ((r)->_name == ROMENTRY_RELOAD) +#define ROMENTRY_ISCONTINUE(r) ((r)->_name == ROMENTRY_CONTINUE) +#define ROMENTRY_ISFILL(r) ((r)->_name == ROMENTRY_FILL) +#define ROMENTRY_ISCOPY(r) ((r)->_name == ROMENTRY_COPY) +#define ROMENTRY_ISIGNORE(r) ((r)->_name == ROMENTRY_IGNORE) +#define ROMENTRY_ISSYSTEM_BIOS(r) ((r)->_name == ROMENTRY_SYSTEM_BIOS) +#define ROMENTRY_ISREGIONEND(r) (ROMENTRY_ISREGION(r) || ROMENTRY_ISEND(r)) + +/* ----- per-region macros ----- */ +#define ROMREGION_GETTYPE(r) ((FPTR)(r)->_hashdata) +#define ROMREGION_GETLENGTH(r) ((r)->_length) +#define ROMREGION_GETFLAGS(r) ((r)->_flags) +#define ROMREGION_GETWIDTH(r) (8 << (ROMREGION_GETFLAGS(r) & ROMREGION_WIDTHMASK)) +#define ROMREGION_ISLITTLEENDIAN(r) ((ROMREGION_GETFLAGS(r) & ROMREGION_ENDIANMASK) == ROMREGION_LE) +#define ROMREGION_ISBIGENDIAN(r) ((ROMREGION_GETFLAGS(r) & ROMREGION_ENDIANMASK) == ROMREGION_BE) +#define ROMREGION_ISINVERTED(r) ((ROMREGION_GETFLAGS(r) & ROMREGION_INVERTMASK) == ROMREGION_INVERT) +#define ROMREGION_ISDISPOSE(r) ((ROMREGION_GETFLAGS(r) & ROMREGION_DISPOSEMASK) == ROMREGION_DISPOSE) +#define ROMREGION_ISLOADUPPER(r) ((ROMREGION_GETFLAGS(r) & ROMREGION_LOADUPPERMASK) == ROMREGION_LOADUPPER) +#define ROMREGION_ISERASE(r) ((ROMREGION_GETFLAGS(r) & ROMREGION_ERASEMASK) == ROMREGION_ERASE) +#define ROMREGION_GETERASEVAL(r) ((ROMREGION_GETFLAGS(r) & ROMREGION_ERASEVALMASK) >> 8) +#define ROMREGION_GETDATATYPE(r) (ROMREGION_GETFLAGS(r) & ROMREGION_DATATYPEMASK) +#define ROMREGION_ISROMDATA(r) (ROMREGION_GETDATATYPE(r) == ROMREGION_DATATYPEROM) +#define ROMREGION_ISDISKDATA(r) (ROMREGION_GETDATATYPE(r) == ROMREGION_DATATYPEDISK) + + +/* ----- per-ROM macros ----- */ +#define ROM_GETNAME(r) ((r)->_name) +#define ROM_SAFEGETNAME(r) (ROMENTRY_ISFILL(r) ? "fill" : ROMENTRY_ISCOPY(r) ? "copy" : ROM_GETNAME(r)) +#define ROM_GETOFFSET(r) ((r)->_offset) +#define ROM_GETLENGTH(r) ((r)->_length) +#define ROM_GETFLAGS(r) ((r)->_flags) +#define ROM_GETHASHDATA(r) ((r)->_hashdata) +#define ROM_ISOPTIONAL(r) ((ROM_GETFLAGS(r) & ROM_OPTIONALMASK) == ROM_OPTIONAL) +#define ROM_GETGROUPSIZE(r) (((ROM_GETFLAGS(r) & ROM_GROUPMASK) >> 12) + 1) +#define ROM_GETSKIPCOUNT(r) ((ROM_GETFLAGS(r) & ROM_SKIPMASK) >> 16) +#define ROM_ISREVERSED(r) ((ROM_GETFLAGS(r) & ROM_REVERSEMASK) == ROM_REVERSE) +#define ROM_GETBITWIDTH(r) (((ROM_GETFLAGS(r) & ROM_BITWIDTHMASK) >> 21) + 8 * ((ROM_GETFLAGS(r) & ROM_BITWIDTHMASK) == 0)) +#define ROM_GETBITSHIFT(r) ((ROM_GETFLAGS(r) & ROM_BITSHIFTMASK) >> 24) +#define ROM_INHERITSFLAGS(r) ((ROM_GETFLAGS(r) & ROM_INHERITFLAGSMASK) == ROM_INHERITFLAGS) +#define ROM_GETBIOSFLAGS(r) ((ROM_GETFLAGS(r) & ROM_BIOSFLAGSMASK) >> 28) +#define ROM_NOGOODDUMP(r) (hash_data_has_info((r)->_hashdata, HASH_INFO_NO_DUMP)) + + +/* ----- per-disk macros ----- */ +#define DISK_GETINDEX(r) ((r)->_offset) +#define DISK_ISREADONLY(r) ((ROM_GETFLAGS(r) & DISK_READONLYMASK) == DISK_READONLY) + + +/* ----- start/stop macros ----- */ +#define ROM_START(name) static const rom_entry rom_##name[] = { +#define ROM_END { ROMENTRY_END, 0, 0, 0, NULL } }; + + +/* ----- ROM region macros ----- */ +#define ROM_REGION(length,type,flags) { ROMENTRY_REGION, 0, length, flags, (const char*)type }, +#define ROM_REGION16_LE(length,type,flags) ROM_REGION(length, type, (flags) | ROMREGION_16BIT | ROMREGION_LE) +#define ROM_REGION16_BE(length,type,flags) ROM_REGION(length, type, (flags) | ROMREGION_16BIT | ROMREGION_BE) +#define ROM_REGION32_LE(length,type,flags) ROM_REGION(length, type, (flags) | ROMREGION_32BIT | ROMREGION_LE) +#define ROM_REGION32_BE(length,type,flags) ROM_REGION(length, type, (flags) | ROMREGION_32BIT | ROMREGION_BE) +#define ROM_REGION64_LE(length,type,flags) ROM_REGION(length, type, (flags) | ROMREGION_64BIT | ROMREGION_LE) +#define ROM_REGION64_BE(length,type,flags) ROM_REGION(length, type, (flags) | ROMREGION_64BIT | ROMREGION_BE) + + +/* ----- core ROM loading macros ----- */ +#define ROMMD5_LOAD(name,offset,length,hash,flags) { name, offset, length, flags, hash }, +#define ROMX_LOAD(name,offset,length,hash,flags) { name, offset, length, flags, hash }, +#define ROM_LOAD(name,offset,length,hash) ROMX_LOAD(name, offset, length, hash, 0) +#define ROM_LOAD_OPTIONAL(name,offset,length,hash) ROMX_LOAD(name, offset, length, hash, ROM_OPTIONAL) +#define ROM_CONTINUE(offset,length) ROMX_LOAD(ROMENTRY_CONTINUE, offset, length, 0, ROM_INHERITFLAGS) +#define ROM_RELOAD(offset,length) ROMX_LOAD(ROMENTRY_RELOAD, offset, length, 0, ROM_INHERITFLAGS) +#define ROM_FILL(offset,length,value) ROM_LOAD(ROMENTRY_FILL, offset, length, (const char*)value) +#define ROM_COPY(rgn,srcoffset,offset,length) ROMX_LOAD(ROMENTRY_COPY, offset, length, (const char*)srcoffset, (rgn) << 24) +#define ROM_IGNORE(length) ROMX_LOAD(ROMENTRY_IGNORE, 0, length, 0, ROM_INHERITFLAGS) + + +/* ----- specialized loading macros ----- */ +#define ROM_LOAD_NIB_HIGH(name,offset,length,hash) ROMX_LOAD(name, offset, length, hash, ROM_NIBBLE | ROM_SHIFT_NIBBLE_HI) +#define ROM_LOAD_NIB_LOW(name,offset,length,hash) ROMX_LOAD(name, offset, length, hash, ROM_NIBBLE | ROM_SHIFT_NIBBLE_LO) +#define ROM_LOAD16_BYTE(name,offset,length,hash) ROMX_LOAD(name, offset, length, hash, ROM_SKIP(1)) +#define ROM_LOAD16_WORD(name,offset,length,hash) ROM_LOAD(name, offset, length, hash) +#define ROM_LOAD16_WORD_SWAP(name,offset,length,hash) ROMX_LOAD(name, offset, length, hash, ROM_GROUPWORD | ROM_REVERSE) +#define ROM_LOAD32_BYTE(name,offset,length,hash) ROMX_LOAD(name, offset, length, hash, ROM_SKIP(3)) +#define ROM_LOAD32_WORD(name,offset,length,hash) ROMX_LOAD(name, offset, length, hash, ROM_GROUPWORD | ROM_SKIP(2)) +#define ROM_LOAD32_WORD_SWAP(name,offset,length,hash) ROMX_LOAD(name, offset, length, hash, ROM_GROUPWORD | ROM_REVERSE | ROM_SKIP(2)) +#define ROM_LOAD32_DWORD(name,offset,length,hash) ROMX_LOAD(name, offset, length, hash, ROM_GROUPDWORD) + + +/* ----- system BIOS macros ----- */ +#define ROM_SYSTEM_BIOS(value,name,description) ROMX_LOAD(ROMENTRY_SYSTEM_BIOS, 0, 0, name "\0" description, ROM_BIOS(value+1)) + +/* ----- disk loading macros ----- */ +#define DISK_REGION(type) ROM_REGION(1, type, ROMREGION_DATATYPEDISK) +#define DISK_IMAGE(name,idx,hash) ROMMD5_LOAD(name, idx, 0, hash, DISK_READWRITE) +#define DISK_IMAGE_READONLY(name,idx,hash) ROMMD5_LOAD(name, idx, 0, hash, DISK_READONLY) + + +/* ----- hash macros ----- */ +#define CRC(x) "c:" #x "#" +#define SHA1(x) "s:" #x "#" +#define MD5(x) "m:" #x "#" +#define NO_DUMP "$ND$" +#define BAD_DUMP "$BD$" + + + +/*************************************************************************** + FUNCTION PROTOTYPES +***************************************************************************/ + +/* disk handling */ +chd_error open_disk_image(const game_driver *gamedrv, const rom_entry *romp, mame_file **image_file, chd_file **image_chd); +chd_error open_disk_image_options(core_options *options, const game_driver *gamedrv, const rom_entry *romp, mame_file **image_file, chd_file **image_chd); +chd_file *get_disk_handle(int diskindex); + +/* ROM processing */ +void rom_init(running_machine *machine, const rom_entry *romp); +int rom_load_warnings(void); +const rom_entry *rom_first_region(const game_driver *drv); +const rom_entry *rom_next_region(const rom_entry *romp); +const rom_entry *rom_first_file(const rom_entry *romp); +const rom_entry *rom_next_file(const rom_entry *romp); +const rom_entry *rom_first_chunk(const rom_entry *romp); +const rom_entry *rom_next_chunk(const rom_entry *romp); + + +#endif /* __ROMLOAD_H__ */ |