disklabel.h revision 1.3 
1/*	$NetBSD: disklabel.h,v 1.3 2000/01/23 20:08:20 soda Exp $	*/
2
3/*
4 * Copyright (c) 1994 Christopher G. Demetriou
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Christopher G. Demetriou.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#ifndef _MACHINE_DISKLABEL_H_
34#define _MACHINE_DISKLABEL_H_
35
36#define	LABELSECTOR	0			/* sector containing label */
37#define	LABELOFFSET	64			/* offset of label in sector */
38#define	MAXPARTITIONS	8			/* number of partitions */
39#define	RAW_PART	2			/* raw partition: xx?c */
40
41/* DOS partition table -- used when the system is booted from a dos
42 * partition. This is the case on NT systems.
43 */
44#define	DOSBBSECTOR	0		/* DOS boot block relative sector # */
45#define	DOSPARTOFF	446
46#define	NDOSPART	4
47
48struct dos_partition {
49	u_int8_t	dp_flag;	/* bootstrap flags */
50	u_int8_t	dp_shd;		/* starting head */
51	u_int8_t	dp_ssect;	/* starting sector */
52	u_int8_t	dp_scyl;	/* starting cylinder */
53	u_int8_t	dp_typ;		/* partition type (see below) */
54	u_int8_t	dp_ehd;		/* end head */
55	u_int8_t	dp_esect;	/* end sector */
56	u_int8_t	dp_ecyl;	/* end cylinder */
57	u_int32_t	dp_start;	/* absolute starting sector number */
58	u_int32_t	dp_size;	/* partition size in sectors */
59} dos_partitions[NDOSPART];
60
61/* Known DOS partition types. */
62#define	DOSPTYP_386BSD	0xa5		/* 386BSD partition type */
63#define DOSPTYP_NETBSD	DOSPTYP_386BSD	/* NetBSD partition type (XXX) */
64
65#include <sys/dkbad.h>
66struct cpu_disklabel {
67	struct dos_partition dosparts[NDOSPART];
68	struct dkbad bad;
69};
70
71/* Isolate the relevant bits to get sector and cylinder. */
72#define	DPSECT(s)	((s) & 0x3f)
73#define	DPCYL(c, s)	((c) + (((s) & 0xc0) << 2))
74
75#ifdef _KERNEL
76struct disklabel;
77int	bounds_check_with_label __P((struct buf *, struct disklabel *, int));
78#endif
79
80#endif /* _MACHINE_DISKLABEL_H_ */
81