dc321cad51
These are the final (?) modifications to the layout of the NetBSD/Atari bootblock. The bootblock handling can be made backwards compatible using the right config options (COMPAT_11 + DISKLABEL_AHDI).
81 lines
3.6 KiB
C
81 lines
3.6 KiB
C
/* $NetBSD: disklabel.h,v 1.5 1996/02/19 09:05:52 leo Exp $ */
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/*
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* Copyright (c) 1995 Leo Weppelman.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Leo Weppelman.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MACHINE_DISKLABEL_H_
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#define _MACHINE_DISKLABEL_H_
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/*
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* On a volume, exclusively used by NetBSD, the boot block starts at
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* sector 0. To allow shared use of a volume between two or more OS's,
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* the vendor specific AHDI format is supported. In this case the boot
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* block is located at the start of an AHDI partition. In any case the
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* size of the boot block must be at least 8KB.
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*/
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#define BBMINSIZE 8192 /* minimum size of boot block */
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#define LABELSECTOR 0 /* `natural' start of boot block */
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#define LABELOFFSET 516 /* offset of disk label in bytes,
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relative to start of boot block */
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#define LABELMAXSIZE 1020 /* maximum size of disk label, at
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least (MAXPARTITIONS * 16 + 152)*/
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#define MAXPARTITIONS 16 /* max. # of NetBSD partitions */
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#define RAW_PART 2 /* xx?c is raw partition */
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#define MAXAUXROOTS 29 /* max. # of auxilary root sectors */
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struct cpu_disklabel {
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u_int cd_bblock; /* start of NetBSD boot block */
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#define NO_BOOT_BLOCK ((u_int)-1)
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u_int cd_label; /* offset of NetBSD disk label */
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#ifdef DISKLABEL_AHDI
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u_int cd_bslst; /* start of AHDI bad sector list */
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u_int cd_bslend; /* end of AHDI bad sector list */
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u_int cd_roots[MAXAUXROOTS+1]; /* auxilary root sectors */
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#endif /* DISKLABEL_AHDI */
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};
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struct bootblock {
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u_int8_t bb_xxboot[LABELOFFSET - sizeof(u_int32_t)];
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/* first-stage boot loader */
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u_int32_t bb_magic; /* boot block magic number */
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#define NBDAMAGIC 0x4e424441 /* 'NBDA' */
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#define AHDIMAGIC 0x41484449 /* 'AHDI' */
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u_int8_t bb_label[LABELMAXSIZE]; /* disk pack label */
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u_int8_t bb_bootxx[BBMINSIZE - LABELOFFSET - LABELMAXSIZE];
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/* second-stage boot loader*/
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};
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struct disklabel;
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#define BBGETLABEL(bb, dl) *(dl) = *((struct disklabel *)(bb)->bb_label)
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#define BBSETLABEL(bb, dl) *((struct disklabel *)(bb)->bb_label) = *(dl)
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#endif /* _MACHINE_DISKLABEL_H_ */
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