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Diffstat (limited to 'sys/msdosfs/bpb.h')
| -rw-r--r-- | sys/msdosfs/bpb.h | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/sys/msdosfs/bpb.h b/sys/msdosfs/bpb.h deleted file mode 100644 index 42c941b..0000000 --- a/sys/msdosfs/bpb.h +++ /dev/null @@ -1,215 +0,0 @@ -/* $FreeBSD$ */ -/* $NetBSD: bpb.h,v 1.7 1997/11/17 15:36:24 ws Exp $ */ - -/* - * Written by Paul Popelka (paulp@uts.amdahl.com) - * - * You can do anything you want with this software, just don't say you wrote - * it, and don't remove this notice. - * - * This software is provided "as is". - * - * The author supplies this software to be publicly redistributed on the - * understanding that the author is not responsible for the correct - * functioning of this software in any circumstances and is not liable for - * any damages caused by this software. - * - * October 1992 - */ - -/* - * BIOS Parameter Block (BPB) for DOS 3.3 - */ -struct bpb33 { - u_int16_t bpbBytesPerSec; /* bytes per sector */ - u_int8_t bpbSecPerClust; /* sectors per cluster */ - u_int16_t bpbResSectors; /* number of reserved sectors */ - u_int8_t bpbFATs; /* number of FATs */ - u_int16_t bpbRootDirEnts; /* number of root directory entries */ - u_int16_t bpbSectors; /* total number of sectors */ - u_int8_t bpbMedia; /* media descriptor */ - u_int16_t bpbFATsecs; /* number of sectors per FAT */ - u_int16_t bpbSecPerTrack; /* sectors per track */ - u_int16_t bpbHeads; /* number of heads */ - u_int16_t bpbHiddenSecs; /* number of hidden sectors */ -}; - -/* - * BPB for DOS 5.0 The difference is bpbHiddenSecs is a short for DOS 3.3, - * and bpbHugeSectors is not in the 3.3 bpb. - */ -struct bpb50 { - u_int16_t bpbBytesPerSec; /* bytes per sector */ - u_int8_t bpbSecPerClust; /* sectors per cluster */ - u_int16_t bpbResSectors; /* number of reserved sectors */ - u_int8_t bpbFATs; /* number of FATs */ - u_int16_t bpbRootDirEnts; /* number of root directory entries */ - u_int16_t bpbSectors; /* total number of sectors */ - u_int8_t bpbMedia; /* media descriptor */ - u_int16_t bpbFATsecs; /* number of sectors per FAT */ - u_int16_t bpbSecPerTrack; /* sectors per track */ - u_int16_t bpbHeads; /* number of heads */ - u_int32_t bpbHiddenSecs; /* # of hidden sectors */ - u_int32_t bpbHugeSectors; /* # of sectors if bpbSectors == 0 */ -}; - -/* - * BPB for DOS 7.10 (FAT32). This one has a few extensions to bpb50. - */ -struct bpb710 { - u_int16_t bpbBytesPerSec; /* bytes per sector */ - u_int8_t bpbSecPerClust; /* sectors per cluster */ - u_int16_t bpbResSectors; /* number of reserved sectors */ - u_int8_t bpbFATs; /* number of FATs */ - u_int16_t bpbRootDirEnts; /* number of root directory entries */ - u_int16_t bpbSectors; /* total number of sectors */ - u_int8_t bpbMedia; /* media descriptor */ - u_int16_t bpbFATsecs; /* number of sectors per FAT */ - u_int16_t bpbSecPerTrack; /* sectors per track */ - u_int16_t bpbHeads; /* number of heads */ - u_int32_t bpbHiddenSecs; /* # of hidden sectors */ - u_int32_t bpbHugeSectors; /* # of sectors if bpbSectors == 0 */ - u_int32_t bpbBigFATsecs; /* like bpbFATsecs for FAT32 */ - u_int16_t bpbExtFlags; /* extended flags: */ -#define FATNUM 0xf /* mask for numbering active FAT */ -#define FATMIRROR 0x80 /* FAT is mirrored (like it always was) */ - u_int16_t bpbFSVers; /* filesystem version */ -#define FSVERS 0 /* currently only 0 is understood */ - u_int32_t bpbRootClust; /* start cluster for root directory */ - u_int16_t bpbFSInfo; /* filesystem info structure sector */ - u_int16_t bpbBackup; /* backup boot sector */ - /* There is a 12 byte filler here, but we ignore it */ -}; - -#ifdef atari -/* - * BPB for gemdos filesystems. Atari leaves the obsolete stuff undefined. - * Currently there is no need for a separate BPB structure. - */ -#if 0 -struct bpb_a { - u_int16_t bpbBytesPerSec; /* bytes per sector */ - u_int8_t bpbSecPerClust; /* sectors per cluster */ - u_int16_t bpbResSectors; /* number of reserved sectors */ - u_int8_t bpbFATs; /* number of FATs */ - u_int16_t bpbRootDirEnts; /* number of root directory entries */ - u_int16_t bpbSectors; /* total number of sectors */ - u_int8_t bpbUseless1; /* meaningless on gemdos fs */ - u_int16_t bpbFATsecs; /* number of sectors per FAT */ - u_int16_t bpbUseless2; /* meaningless for harddisk fs */ - u_int16_t bpbUseless3; /* meaningless for harddisk fs */ - u_int16_t bpbHiddenSecs; /* the TOS-BIOS ignores this */ -}; -#endif -#endif /* atari */ - -/* - * The following structures represent how the bpb's look on disk. shorts - * and longs are just character arrays of the appropriate length. This is - * because the compiler forces shorts and longs to align on word or - * halfword boundaries. - * - * XXX The little-endian code here assumes that the processor can access - * 16-bit and 32-bit quantities on byte boundaries. If this is not true, - * use the macros for the big-endian case. - */ - -#include <machine/endian.h> - -#ifdef __i386__ -#define UNLALIGNED_ACCESS -#endif - -#if (BYTE_ORDER == LITTLE_ENDIAN) && defined(UNALIGNED_ACCESS) -#define getushort(x) *((u_int16_t *)(x)) -#define getulong(x) *((u_int32_t *)(x)) -#define putushort(p, v) (*((u_int16_t *)(p)) = (v)) -#define putulong(p, v) (*((u_int32_t *)(p)) = (v)) -#else -#define getushort(x) (((u_int8_t *)(x))[0] + (((u_int8_t *)(x))[1] << 8)) -#define getulong(x) (((u_int8_t *)(x))[0] + (((u_int8_t *)(x))[1] << 8) \ - + (((u_int8_t *)(x))[2] << 16) \ - + (((u_int8_t *)(x))[3] << 24)) -#define putushort(p, v) (((u_int8_t *)(p))[0] = (v), \ - ((u_int8_t *)(p))[1] = (v) >> 8) -#define putulong(p, v) (((u_int8_t *)(p))[0] = (v), \ - ((u_int8_t *)(p))[1] = (v) >> 8, \ - ((u_int8_t *)(p))[2] = (v) >> 16,\ - ((u_int8_t *)(p))[3] = (v) >> 24) -#endif - -/* - * BIOS Parameter Block (BPB) for DOS 3.3 - */ -struct byte_bpb33 { - int8_t bpbBytesPerSec[2]; /* bytes per sector */ - int8_t bpbSecPerClust; /* sectors per cluster */ - int8_t bpbResSectors[2]; /* number of reserved sectors */ - int8_t bpbFATs; /* number of FATs */ - int8_t bpbRootDirEnts[2]; /* number of root directory entries */ - int8_t bpbSectors[2]; /* total number of sectors */ - int8_t bpbMedia; /* media descriptor */ - int8_t bpbFATsecs[2]; /* number of sectors per FAT */ - int8_t bpbSecPerTrack[2]; /* sectors per track */ - int8_t bpbHeads[2]; /* number of heads */ - int8_t bpbHiddenSecs[2]; /* number of hidden sectors */ -}; - -/* - * BPB for DOS 5.0 The difference is bpbHiddenSecs is a short for DOS 3.3, - * and bpbHugeSectors is not in the 3.3 bpb. - */ -struct byte_bpb50 { - int8_t bpbBytesPerSec[2]; /* bytes per sector */ - int8_t bpbSecPerClust; /* sectors per cluster */ - int8_t bpbResSectors[2]; /* number of reserved sectors */ - int8_t bpbFATs; /* number of FATs */ - int8_t bpbRootDirEnts[2]; /* number of root directory entries */ - int8_t bpbSectors[2]; /* total number of sectors */ - int8_t bpbMedia; /* media descriptor */ - int8_t bpbFATsecs[2]; /* number of sectors per FAT */ - int8_t bpbSecPerTrack[2]; /* sectors per track */ - int8_t bpbHeads[2]; /* number of heads */ - int8_t bpbHiddenSecs[4]; /* number of hidden sectors */ - int8_t bpbHugeSectors[4]; /* # of sectors if bpbSectors == 0 */ -}; - -/* - * BPB for DOS 7.10 (FAT32). This one has a few extensions to bpb50. - */ -struct byte_bpb710 { - u_int8_t bpbBytesPerSec[2]; /* bytes per sector */ - u_int8_t bpbSecPerClust; /* sectors per cluster */ - u_int8_t bpbResSectors[2]; /* number of reserved sectors */ - u_int8_t bpbFATs; /* number of FATs */ - u_int8_t bpbRootDirEnts[2]; /* number of root directory entries */ - u_int8_t bpbSectors[2]; /* total number of sectors */ - u_int8_t bpbMedia; /* media descriptor */ - u_int8_t bpbFATsecs[2]; /* number of sectors per FAT */ - u_int8_t bpbSecPerTrack[2]; /* sectors per track */ - u_int8_t bpbHeads[2]; /* number of heads */ - u_int8_t bpbHiddenSecs[4]; /* # of hidden sectors */ - u_int8_t bpbHugeSectors[4]; /* # of sectors if bpbSectors == 0 */ - u_int8_t bpbBigFATsecs[4]; /* like bpbFATsecs for FAT32 */ - u_int8_t bpbExtFlags[2]; /* extended flags: */ - u_int8_t bpbFSVers[2]; /* filesystem version */ - u_int8_t bpbRootClust[4]; /* start cluster for root directory */ - u_int8_t bpbFSInfo[2]; /* filesystem info structure sector */ - u_int8_t bpbBackup[2]; /* backup boot sector */ - /* There is a 12 byte filler here, but we ignore it */ -}; - -/* - * FAT32 FSInfo block. - */ -struct fsinfo { - u_int8_t fsisig1[4]; - u_int8_t fsifill1[480]; - u_int8_t fsisig2[4]; - u_int8_t fsinfree[4]; - u_int8_t fsinxtfree[4]; - u_int8_t fsifill2[12]; - u_int8_t fsisig3[4]; - u_int8_t fsifill3[508]; - u_int8_t fsisig4[4]; -}; |
