1 /* $NetBSD: disklabel.h,v 1.8 2009/10/20 19:10:11 snj Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Leo Weppelman. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef _MACHINE_DISKLABEL_H_ 29 #define _MACHINE_DISKLABEL_H_ 30 31 /* 32 * On a volume, exclusively used by NetBSD, the boot block starts at 33 * sector 0. To allow shared use of a volume between two or more OS's, 34 * the vendor specific AHDI format is supported. In this case the boot 35 * block is located at the start of an AHDI partition. In any case the 36 * size of the boot block must be at least 8KB. 37 */ 38 #define BBMINSIZE 8192 /* minimum size of boot block */ 39 #define LABELSECTOR 0 /* `natural' start of boot block */ 40 #define LABELOFFSET 516 /* offset of disk label in bytes, 41 relative to start of boot block */ 42 #define LABELMAXSIZE 1020 /* maximum size of disk label, at 43 least (MAXPARTITIONS * 16 + 152)*/ 44 #define MAXPARTITIONS 16 /* max. # of NetBSD partitions */ 45 #define SWAP_PART 1 /* xx?b is default swap partition */ 46 #define RAW_PART 2 /* xx?c is raw partition */ 47 48 #define MAXAUXROOTS 29 /* max. # of auxiliary root sectors */ 49 50 struct cpu_disklabel { 51 u_int cd_bblock; /* start of NetBSD boot block */ 52 #define NO_BOOT_BLOCK ((u_int)-1) 53 u_int cd_label; /* offset of NetBSD disk label */ 54 #ifdef DISKLABEL_AHDI 55 u_int cd_bslst; /* start of AHDI bad sector list */ 56 u_int cd_bslend; /* end of AHDI bad sector list */ 57 u_int cd_roots[MAXAUXROOTS+1]; /* auxiliary root sectors */ 58 #endif /* DISKLABEL_AHDI */ 59 }; 60 61 struct bootblock { 62 u_int8_t bb_xxboot[LABELOFFSET - sizeof(u_int32_t)]; 63 /* first-stage boot loader */ 64 u_int32_t bb_magic; /* boot block magic number */ 65 #define NBDAMAGIC 0x4e424441 /* 'NBDA' */ 66 #define AHDIMAGIC 0x41484449 /* 'AHDI' */ 67 u_int8_t bb_label[LABELMAXSIZE]; /* disk pack label */ 68 u_int8_t bb_bootxx[BBMINSIZE - LABELOFFSET - LABELMAXSIZE]; 69 /* second-stage boot loader*/ 70 }; 71 72 struct disklabel; 73 #define BBGETLABEL(bb, dl) *(dl) = *((struct disklabel *)(bb)->bb_label) 74 #define BBSETLABEL(bb, dl) *((struct disklabel *)(bb)->bb_label) = *(dl) 75 76 #endif /* _MACHINE_DISKLABEL_H_ */ 77