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 86 struct cpu_disklabel { 87 struct mbr_partition mbrparts[MBR_PART_COUNT]; 88 #define __HAVE_DISKLABEL_DKBAD 89 struct dkbad bad; 90 }; 91 92 #ifdef _KERNEL 93 struct buf; 94 struct disklabel; 95 96 /* for readdisklabel. rv != 0 -> matches, msg == NULL -> success */ 97 int 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 */ 101 int 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_ */ 106