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_ */