1/* $NetBSD: disklabel.h,v 1.14 2022/05/24 19:37:39 andvar Exp $ */
2
3/*
4 * Copyright (c) 1994 Mark Brinicombe.
5 * Copyright (c) 1994 Brini.
6 * All rights reserved.
7 *
8 * This code is derived from software written for Brini by Mark Brinicombe
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by Brini.
21 * 4. The name of the company nor the name of the author may be used to
22 * endorse or promote products derived from this software without specific
23 * prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * RiscBSD kernel project
38 *
39 * disklabel.h
40 *
41 * machine specific disk label info
42 *
43 * Created : 04/10/94
44 */
45
46#ifndef _ARM_DISKLABEL_H_
47#define _ARM_DISKLABEL_H_
48
49#ifndef LABELUSESMBR
50#define LABELUSESMBR 1 /* use MBR partitionning */
51#endif
52#define LABELSECTOR 1 /* sector containing label */
53#define LABELOFFSET 0 /* offset of label in sector */
54#define MAXPARTITIONS 16 /* number of partitions */
55#define OLDMAXPARTITIONS 8 /* old number of partitions */
56#ifndef RAW_PART
57#define RAW_PART 2 /* raw partition: XX?c */
58#endif
59
60
61#ifdef __HAVE_OLD_DISKLABEL
62/*
63 * We use the highest bit of the minor number for the partition number.
64 * This maintains backward compatibility with device nodes created before
65 * MAXPARTITIONS was increased.
66 */
67#define __ARM_MAXDISKS ((1 << 20) / MAXPARTITIONS)
68#define DISKUNIT(dev) ((minor(dev) / OLDMAXPARTITIONS) % __ARM_MAXDISKS)
69#define DISKPART(dev) ((minor(dev) % OLDMAXPARTITIONS) + \
70 ((minor(dev) / (__ARM_MAXDISKS * OLDMAXPARTITIONS)) * OLDMAXPARTITIONS))
71#define DISKMINOR(unit, part) \
72 (((unit) * OLDMAXPARTITIONS) + ((part) % OLDMAXPARTITIONS) + \
73 ((part) / OLDMAXPARTITIONS) * (__ARM_MAXDISKS * OLDMAXPARTITIONS))
74#endif
75
76#if HAVE_NBTOOL_CONFIG_H
77#include <nbinclude/sys/dkbad.h>
78#include <nbinclude/sys/disklabel_acorn.h>
79#include <nbinclude/sys/bootblock.h>
80#else
81#include <sys/dkbad.h>
82#include <sys/disklabel_acorn.h>
83#include <sys/bootblock.h>
84#endif /* HAVE_NBTOOL_CONFIG_H */
85
86struct cpu_disklabel {
87 struct mbr_partition mbrparts[MBR_PART_COUNT];
88#define __HAVE_DISKLABEL_DKBAD
89 struct dkbad bad;
90};
91
92#ifdef _KERNEL
93struct buf;
94struct disklabel;
95
96/* for readdisklabel. rv != 0 -> matches, msg == NULL -> success */
97int mbr_label_read(dev_t, void (*)(struct buf *), struct disklabel *,
98 struct cpu_disklabel *, const char **, int *, int *);
99
100/* for writedisklabel. rv == 0 -> doesn't match, rv > 0 -> success */
101int mbr_label_locate(dev_t, void (*)(struct buf *),
102 struct disklabel *, struct cpu_disklabel *, int *, int *);
103#endif /* _KERNEL */
104
105#endif /* _ARM_DISKLABEL_H_ */