1/* $NetBSD: ahdilbl.h,v 1.3 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 AHDILABEL_H 29#define AHDILABEL_H 30 31/***** from src/sys/arch/atari/include/disklabel.h *************************/ 32 33/* 34 * On a volume, exclusively used by NetBSD, the boot block starts at 35 * sector 0. To allow shared use of a volume between two or more OS's 36 * the vendor specific AHDI format is supported. In this case the boot 37 * block is located at the start of an AHDI partition. In any case the 38 * size of the boot block must be at least 8KB. 39 */ 40#define BBMINSIZE 8192 /* minimum size of boot block */ 41#define LABELSECTOR 0 /* `natural' start of boot block */ 42#define LABELOFFSET 516 /* offset of disk label in bytes, 43 relative to start of boot block */ 44#define LABELMAXSIZE 1020 /* maximum size of disk label */ 45 46#define MAXPARTITIONS 16 /* max. # of NetBSD partitions */ 47#define RAW_PART 2 /* xx?c is raw partition */ 48 49#define NO_BOOT_BLOCK ((u_int)-1) 50#define MAXAUXROOTS 29 /* max. # of auxiliary root sectors */ 51 52struct bootblock { 53 u_int8_t bb_xxboot[LABELOFFSET - sizeof(u_int32_t)]; 54 /* first-stage boot loader */ 55 u_int32_t bb_magic; /* boot block magic number */ 56#define NBDAMAGIC 0x4e424441 57#define AHDIMAGIC 0x41484449 58 u_int8_t bb_label[LABELMAXSIZE]; /* disk pack label */ 59 u_int8_t bb_bootxx[BBMINSIZE - (LABELOFFSET + LABELMAXSIZE)]; 60 /* second-stage boot loader*/ 61}; 62 63#define BBGETLABEL(bb, dl) memcpy((dl), (bb)->bb_label, sizeof (struct disklabel)) 64#define BBSETLABEL(bb, dl) memcpy((bb)->bb_label, (dl), sizeof (struct disklabel)) 65 66/***** from src/sys/arch/atari/include/ahdilabel.h *************************/ 67 68#define AHDI_BSIZE 512 /* AHDI blocksize */ 69#define AHDI_BBLOCK 0 /* AHDI bootblock (root sector) */ 70#define AHDI_MAXROOTS (MAXAUXROOTS) /* max. # of AHDI rootsectors */ 71#define AHDI_MAXPARTS (AHDI_MAXROOTS+3) /* max. # of AHDI partitions */ 72 73/* 74 * Various `well known' AHDI partition identifiers. 75 */ 76#define AHDI_MKPID(x,y,z) ( ((u_int32_t)(x) << 16) \ 77 | ((u_int32_t)(y) << 8) \ 78 | ((u_int32_t)(z)) \ 79 ) 80#define AHDI_PID_XGM AHDI_MKPID('X','G','M') 81#define AHDI_PID_GEM AHDI_MKPID('G','E','M') 82#define AHDI_PID_BGM AHDI_MKPID('B','G','M') 83#define AHDI_PID_RAW AHDI_MKPID('R','A','W') 84#define AHDI_PID_SWP AHDI_MKPID('S','W','P') 85#define AHDI_PID_NBD AHDI_MKPID('N','B','D') 86#define AHDI_PID_NBR AHDI_MKPID('N','B','R') 87#define AHDI_PID_NBS AHDI_MKPID('N','B','S') 88#define AHDI_PID_NBU AHDI_MKPID('N','B','U') 89 90/* 91 * Format of AHDI boot block. 92 */ 93#define AHDI_MAXRPD 4 /* max. # of partition descriptors */ 94 /* in the AHDI bootblock (aka root)*/ 95#define AHDI_MAXARPD 2 /* max. # of partition descriptors */ 96 /* in an AHDI auxiliary root sector */ 97 98struct ahdi_part { 99 u_int8_t ap_flg; /* bit 0 is in-use flag */ 100 u_int8_t ap_id[3]; /* id: GEM, BGM, XGM, UNX, MIX */ 101 u_int32_t ap_st; /* block where partition starts */ 102 u_int32_t ap_size; /* partition size in blocks */ 103#define ap_end ap_size /* in the in-core copy, store end instead of size */ 104}; 105 106struct ahdi_root { 107 u_int8_t ar_fill[0x1c2];/* filler, can be boot code */ 108 u_int32_t ar_hdsize; /* size of entire volume in blocks */ 109 struct ahdi_part ar_parts[AHDI_MAXRPD]; /* root partition table */ 110 u_int32_t ar_bslst; /* start of bad-sector list */ 111 u_int32_t ar_bslsize; /* # of blocks in bad-sector list */ 112 u_int16_t ar_cksum; 113}; 114 115/* 116 * Partition table representation as generated by ahdi_getparts(): 117 */ 118typedef struct { 119 char id[4]; 120 u_int start; 121 u_int end; 122 u_int rsec; 123 u_int rent; 124 int mod; 125} part_t; 126 127typedef struct { 128 int nparts; 129 part_t *parts; 130} ptable_t; 131 132EXTERN u_int ahdi_getparts PROTO((disk_t *, ptable_t *, u_int, u_int)); 133 134struct disklabel; 135EXTERN int bsd_getlabel PROTO((disk_t *, struct disklabel *, u_int)); 136#endif /* AHDILABEL_H */ 137