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phunix/sys/fs/msdosfs/bpb.h
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC) 
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

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/* $NetBSD: bpb.h,v 1.7 2012/11/04 17:57:59 jakllsch 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
*/
#ifndef _MSDOSFS_BPB_H_
#define _MSDOSFS_BPB_H_
/*
* 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 */
u_int8_t bpbReserved[12]; /* Reserved for future expansion */
};
#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.
*/
#include <sys/endian.h>
#define getushort(p) le16dec(p)
#define getulong(p) le32dec(p)
#define putushort(p, v) le16enc((p), (v))
#define putulong(p, v) le32enc((p), (v))
/*
* 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 */
u_int8_t bpbReserved[12]; /* Reserved for future expansion */
};
/*
* 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];
};
#endif /* _MSDOSFS_BPB_H_ */
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