sun_disklabel.h revision 127976 
1/*
2 * Copyright (c) 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This software was developed by the Computer Systems Engineering group
6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
7 * contributed to Berkeley.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
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 *	@(#)sun_disklabel.h	8.1 (Berkeley) 6/11/93
34 *	$NetBSD: disklabel.h,v 1.2 1998/08/22 14:55:28 mrg Exp $
35 *
36 * $FreeBSD: head/sys/sys/sun_disklabel.h 127976 2004-04-07 04:19:52Z imp $
37 */
38
39#ifndef _SYS_SUN_DISKLABEL_H_
40#define	_SYS_SUN_DISKLABEL_H_
41
42/*
43 * SunOS/Solaris disk label layout (partial).
44 *
45 * Suns disk label format contains a lot of historical baggage which we
46 * ignore entirely.  The structure below contains the relevant bits and the
47 * _enc/_dec functions encode/decode only these fields.
48 */
49
50#define	SUN_DKMAGIC	55998
51#define	SUN_NPART	8
52#define	SUN_RAWPART	2
53#define	SUN_SIZE	512
54/*
55 * XXX: I am actually not sure if this should be "16 sectors" or "8192 bytes".
56 * XXX: Considering that Sun went to the effort of getting 512 byte compatible
57 * XXX: CDROM drives produced my guess is that Sun computers stand little or
58 * XXX: even no chance of running, much less booting on !=512 byte media.
59 * XXX: Define this is in terms of bytes since that is easier for us.
60 */
61#define	SUN_BOOTSIZE	8192
62
63/* partition info */
64struct sun_dkpart {
65	u_int32_t	sdkp_cyloffset;		/* starting cylinder */
66	u_int32_t	sdkp_nsectors;		/* number of sectors */
67};
68
69struct sun_disklabel {
70	char		sl_text[128];
71	u_int16_t	sl_rpm;			/* rotational speed */
72	u_int16_t	sl_pcylinders;		/* number of physical cyls */
73	u_int16_t	sl_sparespercyl;	/* spare sectors per cylinder */
74	u_int16_t	sl_interleave;		/* interleave factor */
75	u_int16_t	sl_ncylinders;		/* data cylinders */
76	u_int16_t	sl_acylinders;		/* alternate cylinders */
77	u_int16_t	sl_ntracks;		/* tracks per cylinder */
78	u_int16_t	sl_nsectors;		/* sectors per track */
79	struct sun_dkpart sl_part[SUN_NPART];	/* partition layout */
80	u_int16_t	sl_magic;		/* == SUN_DKMAGIC */
81};
82
83int sunlabel_dec(void const *pp, struct sun_disklabel *sl);
84void sunlabel_enc(void *pp, struct sun_disklabel *sl);
85
86#endif /* _SYS_SUN_DISKLABEL_H_ */
87