diskmbr.h revision 108392 
1/*
2 * Copyright (c) 1987, 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)disklabel.h	8.2 (Berkeley) 7/10/94
34 * $FreeBSD: head/sys/sys/diskmbr.h 108392 2002-12-29 14:56:04Z phk $
35 */
36
37#ifndef _SYS_DISKMBR_H_
38#define	_SYS_DISKMBR_H_
39
40#include <sys/ioccom.h>
41
42#define	DOSBBSECTOR	0	/* DOS boot block relative sector number */
43#define	DOSPARTOFF	446
44#define	NDOSPART	4
45#define	DOSPTYP_386BSD	0xa5	/* 386BSD partition type */
46#define	DOSPTYP_LINSWP	0x82	/* Linux swap partition */
47#define	DOSPTYP_LINUX	0x83	/* Linux partition */
48#define	DOSPTYP_EXT	5	/* DOS extended partition */
49#define	DOSPTYP_EXTLBA	15	/* DOS extended partition */
50
51struct dos_partition {
52	unsigned char	dp_flag;	/* bootstrap flags */
53	unsigned char	dp_shd;		/* starting head */
54	unsigned char	dp_ssect;	/* starting sector */
55	unsigned char	dp_scyl;	/* starting cylinder */
56	unsigned char	dp_typ;		/* partition type */
57	unsigned char	dp_ehd;		/* end head */
58	unsigned char	dp_esect;	/* end sector */
59	unsigned char	dp_ecyl;	/* end cylinder */
60	u_int32_t	dp_start;	/* absolute starting sector number */
61	u_int32_t	dp_size;	/* partition size in sectors */
62};
63#ifdef CTASSERT
64CTASSERT(sizeof (struct dos_partition) == 16);
65#endif
66
67#define	DPSECT(s) ((s) & 0x3f)		/* isolate relevant bits of sector */
68#define	DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */
69
70#define DIOCGMBR 	_IOR('M', 128, u_char[512])
71#define DIOCSMBR 	_IOW('M', 129, u_char[512])
72
73
74#endif /* !_SYS_DISKMBR_H_ */
75