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/* $OpenBSD: disklabel.h,v 1.29 2006/10/04 00:52:55 krw Exp $ */
/* $NetBSD: disklabel.h,v 1.3 1996/03/09 20:52:54 ghudson Exp $ */
/*
* Copyright (c) 1994 Christopher G. Demetriou
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MACHINE_DISKLABEL_H_
#define _MACHINE_DISKLABEL_H_
#define LABELSECTOR 1 /* sector containing label */
#define LABELOFFSET 0 /* offset of label in sector */
#define MAXPARTITIONS 16 /* number of partitions */
#define RAW_PART 2 /* raw partition: ie. rsd0c */
/* DOS partition table -- located in boot block */
#define DOSBBSECTOR 0 /* DOS boot block relative sector # */
#define DOSPARTOFF 446
#define DOSDISKOFF 444
#define NDOSPART 4
#define DOSACTIVE 0x80 /* active partition */
struct dos_partition {
u_int8_t dp_flag; /* bootstrap flags */
u_int8_t dp_shd; /* starting head */
u_int8_t dp_ssect; /* starting sector */
u_int8_t dp_scyl; /* starting cylinder */
u_int8_t dp_typ; /* partition type (see below) */
u_int8_t dp_ehd; /* end head */
u_int8_t dp_esect; /* end sector */
u_int8_t dp_ecyl; /* end cylinder */
u_int32_t dp_start; /* absolute starting sector number */
u_int32_t dp_size; /* partition size in sectors */
};
/* Known DOS partition types. */
#define DOSPTYP_UNUSED 0x00 /* Unused partition */
#define DOSPTYP_FAT12 0x01 /* 12-bit FAT */
#define DOSPTYP_FAT16S 0x04 /* 16-bit FAT, less than 32M */
#define DOSPTYP_EXTEND 0x05 /* Extended; contains sub-partitions */
#define DOSPTYP_FAT16B 0x06 /* 16-bit FAT, more than 32M */
#define DOSPTYP_FAT32 0x0b /* 32-bit FAT */
#define DOSPTYP_FAT32L 0x0c /* 32-bit FAT, LBA-mapped */
#define DOSPTYP_FAT16L 0x0e /* 16-bit FAT, LBA-mapped */
#define DOSPTYP_EXTENDL 0x0f /* Extended, LBA-mapped; contains sub-partitions */
#define DOSPTYP_ONTRACK 0x54
#define DOSPTYP_LINUX 0x83 /* That other thing */
#define DOSPTYP_FREEBSD 0xa5 /* FreeBSD partition type */
#define DOSPTYP_OPENBSD 0xa6 /* OpenBSD partition type */
#define DOSPTYP_NETBSD 0xa9 /* NetBSD partition type */
struct dos_mbr {
u_int8_t dmbr_boot[DOSPARTOFF];
struct dos_partition dmbr_parts[NDOSPART];
u_int16_t dmbr_sign;
} __packed;
#define DOSMBR_SIGNATURE (0xaa55)
#define DOSMBR_SIGNATURE_OFF (0x1fe)
struct cpu_disklabel {
struct dos_partition dosparts[NDOSPART];
};
/* Isolate the relevant bits to get sector and cylinder. */
#define DPSECT(s) ((s) & 0x3f)
#define DPCYL(c, s) ((c) + (((s) & 0xc0) << 2))
#endif /* _MACHINE_DISKLABEL_H_ */
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