95 lines
4.1 KiB
C
95 lines
4.1 KiB
C
/* $NetBSD: disklabel_mbr.h,v 1.7 2002/03/02 07:04:31 matt Exp $ */
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/*
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* Copyright (c) 1994, 1998 Christopher G. Demetriou
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_DISKLABEL_MBR_H_
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#define _SYS_DISKLABEL_MBR_H_
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/*
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* From i386 disklabel.h rev 1.6, with cleanups and modifications to
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* make it easier to use as MI code.
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*
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* Note, all fields (including magic number) are little-endian!
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*/
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/* MBR ("Master Boot Record"; DOS) partition table -- located in boot block */
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#define MBR_BBSECTOR 0 /* MBR relative sector # */
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#define MBR_PARTOFF 446 /* offset of MBR partition table */
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#define MBR_MAGICOFF 510 /* offset of magic number */
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#define MBR_MAGIC 0xaa55 /* MBR magic number */
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#define NMBRPART 4
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#ifndef __ASSEMBLER__
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struct mbr_partition {
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u_int8_t mbrp_flag; /* bootstrap flags */
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u_int8_t mbrp_shd; /* starting head */
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u_int8_t mbrp_ssect; /* starting sector */
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u_int8_t mbrp_scyl; /* starting cylinder */
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u_int8_t mbrp_typ; /* partition type (see below) */
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u_int8_t mbrp_ehd; /* end head */
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u_int8_t mbrp_esect; /* end sector */
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u_int8_t mbrp_ecyl; /* end cylinder */
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u_int32_t mbrp_start; /* absolute starting sector number */
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u_int32_t mbrp_size; /* partition size in sectors */
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};
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#endif
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/* Known MBR flags: */
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#define MBR_FLAGS_ACTIVE 0x80 /* This is the boot partition */
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/* Known MBR partition types: */
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#define MBR_PTYPE_NETBSD 0xa9 /* NetBSD partition type */
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#define MBR_PTYPE_386BSD 0xa5 /* 386BSD partition type */
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#define MBR_PTYPE_FAT12 0x01 /* 12-bit FAT */
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#define MBR_PTYPE_FAT16S 0x04 /* 16-bit FAT, less than 32M */
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#define MBR_PTYPE_EXT 0x05 /* extended partition */
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#define MBR_PTYPE_FAT16B 0x06 /* 16-bit FAT, more than 32M */
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#define MBR_PTYPE_NTFS 0x07 /* OS/2 HPFS, NTFS, QNX2, Adv. UNIX */
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#define MBR_PTYPE_FAT32 0x0b /* 32-bit FAT */
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#define MBR_PTYPE_FAT32L 0x0c /* 32-bit FAT, LBA-mapped */
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#define MBR_PTYPE_FAT16L 0x0e /* 16-bit FAT, LBA-mapped */
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#define MBR_PTYPE_EXT_LBA 0x0f /* extended partition, LBA-mapped */
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#define MBR_PTYPE_LNXSWAP 0x82 /* Linux swap or Solaris */
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#define MBR_PTYPE_LNXEXT2 0x83 /* Linux native */
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#define MBR_PTYPE_EXT_LNX 0x85 /* Linux extended partition */
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#define MBR_PTYPE_NTFSVOL 0x87 /* NTFS volume set or HPFS mirrored */
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#define MBR_PTYPE_PREP 0x41 /* PReP */
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/* Isolate the relevant bits to get sector and cylinder. */
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#define MBR_PSECT(s) ((s) & 0x3f)
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#define MBR_PCYL(c, s) ((c) + (((s) & 0xc0) << 2))
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#define MBR_IS_EXTENDED(x) ((x) == MBR_PTYPE_EXT || \
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(x) == MBR_PTYPE_EXT_LBA || \
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(x) == MBR_PTYPE_EXT_LNX)
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#endif /* _SYS_DISKLABEL_MBR_H_ */
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