disklabel.h revision 1.18
1/* $OpenBSD: disklabel.h,v 1.18 2006/10/18 20:09:38 deraadt Exp $ */ 2/* $NetBSD: disklabel.h,v 1.1 1995/02/13 23:07:34 cgd Exp $ */ 3 4/* 5 * Copyright (c) 1994 Christopher G. Demetriou 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Christopher G. Demetriou. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#ifndef _MACHINE_DISKLABEL_H_ 35#define _MACHINE_DISKLABEL_H_ 36 37#define ALPHA_LABELSECTOR 0 /* sector containing label */ 38#define ALPHA_LABELOFFSET 64 /* offset of label in sector */ 39#define I386_LABELSECTOR 1 /* sector containing label */ 40#define I386_LABELOFFSET 0 /* offset of label in sector */ 41 42#define LABELSECTOR ALPHA_LABELSECTOR 43#define LABELOFFSET ALPHA_LABELOFFSET 44 45#define MAXPARTITIONS 16 /* number of partitions */ 46#define RAW_PART 2 /* raw partition: xx?c */ 47 48/* DOS partition table -- located in boot block */ 49#define DOSBBSECTOR 0 /* DOS boot block relative sector # */ 50#define DOSPARTOFF 446 51#define DOSACTIVE 0x80 52#define NDOSPART 4 53#define DOSMBR_SIGNATURE 0xaa55 54#define DOSMBR_SIGNATURE_OFF 0x1fe 55 56struct dos_partition { 57 u_int8_t dp_flag; /* bootstrap flags */ 58 u_int8_t dp_shd; /* starting head */ 59 u_int8_t dp_ssect; /* starting sector */ 60 u_int8_t dp_scyl; /* starting cylinder */ 61 u_int8_t dp_typ; /* partition type (see below) */ 62 u_int8_t dp_ehd; /* end head */ 63 u_int8_t dp_esect; /* end sector */ 64 u_int8_t dp_ecyl; /* end cylinder */ 65 u_int32_t dp_start; /* absolute starting sector number */ 66 u_int32_t dp_size; /* partition size in sectors */ 67}; 68 69/* Known DOS partition types. */ 70#define DOSPTYP_UNUSED 0x00 /* Unused partition */ 71#define DOSPTYP_FAT12 0x01 /* 12-bit FAT */ 72#define DOSPTYP_FAT16S 0x04 /* 16-bit FAT, less than 32M */ 73#define DOSPTYP_EXTEND 0x05 /* Extended; contains sub-partitions */ 74#define DOSPTYP_FAT16B 0x06 /* 16-bit FAT, more than 32M */ 75#define DOSPTYP_FAT32 0x0b /* 32-bit FAT */ 76#define DOSPTYP_FAT32L 0x0c /* 32-bit FAT, LBA-mapped */ 77#define DOSPTYP_FAT16L 0x0e /* 16-bit FAT, LBA-mapped */ 78#define DOSPTYP_EXTENDL 0x0f /* Extended, LBA-mapped; contains sub-partitions */ 79#define DOSPTYP_ONTRACK 0x54 80#define DOSPTYP_LINUX 0x83 /* That other thing */ 81#define DOSPTYP_FREEBSD 0xa5 /* FreeBSD partition type */ 82#define DOSPTYP_OPENBSD 0xa6 /* OpenBSD partition type */ 83#define DOSPTYP_NETBSD 0xa9 /* NetBSD partition type */ 84 85/* Isolate the relevant bits to get sector and cylinder. */ 86#define DPSECT(s) ((s) & 0x3f) 87#define DPCYL(c, s) ((c) + (((s) & 0xc0) << 2)) 88 89struct cpu_disklabel { 90 int labelsector; 91 union { 92 struct { 93 } _alpha; 94 struct { 95 struct dos_partition dosparts[NDOSPART]; 96 } _i386; 97 } u; 98}; 99 100#endif /* _MACHINE_DISKLABEL_H_ */ 101