disklabel.h revision 1.12
1/* $NetBSD: disklabel.h,v 1.12 2013/05/27 07:37:20 msaitoh 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 * We use the highest bit of the minor number for the partition number. 62 * This maintains backward compatibility with device nodes created before 63 * MAXPARTITIONS was increased. 64 */ 65#define __ARM_MAXDISKS ((1 << 20) / MAXPARTITIONS) 66#define DISKUNIT(dev) ((minor(dev) / OLDMAXPARTITIONS) % __ARM_MAXDISKS) 67#define DISKPART(dev) ((minor(dev) % OLDMAXPARTITIONS) + \ 68 ((minor(dev) / (__ARM_MAXDISKS * OLDMAXPARTITIONS)) * OLDMAXPARTITIONS)) 69#define DISKMINOR(unit, part) \ 70 (((unit) * OLDMAXPARTITIONS) + ((part) % OLDMAXPARTITIONS) + \ 71 ((part) / OLDMAXPARTITIONS) * (__ARM_MAXDISKS * OLDMAXPARTITIONS)) 72 73#if HAVE_NBTOOL_CONFIG_H 74#include <nbinclude/sys/dkbad.h> 75#include <nbinclude/sys/disklabel_acorn.h> 76#include <nbinclude/sys/bootblock.h> 77#else 78#include <sys/dkbad.h> 79#include <sys/disklabel_acorn.h> 80#include <sys/bootblock.h> 81#endif /* HAVE_NBTOOL_CONFIG_H */ 82 83struct cpu_disklabel { 84 struct mbr_partition mbrparts[MBR_PART_COUNT]; 85#define __HAVE_DISKLABEL_DKBAD 86 struct dkbad bad; 87}; 88 89#ifdef _KERNEL 90struct buf; 91struct disklabel; 92 93/* for readdisklabel. rv != 0 -> matches, msg == NULL -> success */ 94int mbr_label_read(dev_t, void (*)(struct buf *), struct disklabel *, 95 struct cpu_disklabel *, const char **, int *, int *); 96 97/* for writedisklabel. rv == 0 -> dosen't match, rv > 0 -> success */ 98int mbr_label_locate(dev_t, void (*)(struct buf *), 99 struct disklabel *, struct cpu_disklabel *, int *, int *); 100#endif /* _KERNEL */ 101 102#endif /* _ARM_DISKLABEL_H_ */ 103