36d6d3048d
mechanism to ensure all existing /dev nodes continue to work - Adjust boot block layout to fit additional partitions - Adjust number of inodes on install media
63 lines
2.8 KiB
C
63 lines
2.8 KiB
C
/* $NetBSD: disklabel.h,v 1.6 2012/07/02 22:42:18 abs Exp $ */
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/*
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* Copyright (c) 1994 Christopher G. Demetriou
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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 Christopher G. Demetriou.
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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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#define LABELUSESMBR 0 /* no MBR partitionning */
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#define LABELSECTOR 0 /* sector containing label */
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#define LABELOFFSET 64 /* offset of label in sector */
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#define MAXPARTITIONS 16 /* number of partitions */
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#define OLDMAXPARTITIONS 8 /* number of partitions before nb-6 */
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#define RAW_PART 2 /* raw partition: xx?c */
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/*
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* We use the highest bit of the minor number for the partition number.
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* This maintains backward compatibility with device nodes created before
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* MAXPARTITIONS was increased.
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*/
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#define __VAX_MAXDISKS ((1 << 20) / MAXPARTITIONS)
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#define DISKUNIT(dev) ((minor(dev) / OLDMAXPARTITIONS) % __VAX_MAXDISKS)
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#define DISKPART(dev) ((minor(dev) % OLDMAXPARTITIONS) + \
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((minor(dev) / (__VAX_MAXDISKS * OLDMAXPARTITIONS)) * OLDMAXPARTITIONS))
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#define DISKMINOR(unit, part) \
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(((unit) * OLDMAXPARTITIONS) + ((part) % OLDMAXPARTITIONS) + \
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((part) / OLDMAXPARTITIONS) * (__VAX_MAXDISKS * OLDMAXPARTITIONS))
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/* Just a dummy */
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#ifndef _LOCORE
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struct cpu_disklabel {
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int cd_dummy; /* must have one element. */
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};
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#endif
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#endif /* _MACHINE_DISKLABEL_H_ */
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