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disklabel.h revision 1.1 
      1 /*	$NetBSD: disklabel.h,v 1.1 1997/10/14 06:48:15 sakamoto Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994 Christopher G. Demetriou
      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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Christopher G. Demetriou.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef _MACHINE_DISKLABEL_H_
     34 #define _MACHINE_DISKLABEL_H_
     35 
     36 #define	LABELSECTOR	1		/* sector containing label */
     37 #define	LABELOFFSET	0		/* offset of label in sector */
     38 #define	MAXPARTITIONS	8		/* number of partitions */
     39 #define	RAW_PART	3		/* raw partition: XX?d (XXX) */
     40 
     41 /* DOS partition table -- located in boot block */
     42 #define	DOSBBSECTOR	0		/* DOS boot block relative sector # */
     43 #define	DOSPARTOFF	446
     44 #define	NDOSPART	4
     45 
     46 struct dos_partition {
     47 	unsigned char	dp_flag;	/* bootstrap flags */
     48 	unsigned char	dp_shd;		/* starting head */
     49 	unsigned char	dp_ssect;	/* starting sector */
     50 	unsigned char	dp_scyl;	/* starting cylinder */
     51 	unsigned char	dp_typ;		/* partition type (see below) */
     52 	unsigned char	dp_ehd;		/* end head */
     53 	unsigned char	dp_esect;	/* end sector */
     54 	unsigned char	dp_ecyl;	/* end cylinder */
     55 	unsigned long	dp_start;	/* absolute starting sector number */
     56 	unsigned long	dp_size;	/* partition size in sectors */
     57 };
     58 
     59 /* Known DOS partition types. */
     60 #define	DOSPTYP_386BSD	0xa5		/* 386BSD partition type */
     61 #define DOSPTYP_NETBSD	DOSPTYP_386BSD	/* NetBSD partition type (XXX) */
     62 #define DOSPTYP_FAT12	0x1		/* 12-bit FAT */
     63 #define DOSPTYP_FAT16S	0x4		/* 16-bit FAT, less than 32M */
     64 #define DOSPTYP_FAT16B	0x6		/* 16-bit FAT, more than 32M */
     65 #define DOSPTYP_FAT16C	0xe		/* 16-bit FAT, CHS-mapped */
     66 
     67 #include <sys/dkbad.h>
     68 struct cpu_disklabel {
     69 	struct dos_partition dosparts[NDOSPART];
     70 	struct dkbad bad;
     71 };
     72 
     73 /* Isolate the relevant bits to get sector and cylinder. */
     74 #define	DPSECT(s)	((s) & 0x3f)
     75 #define	DPCYL(c, s)	((c) + (((s) & 0xc0) << 2))
     76 
     77 #ifdef _KERNEL
     78 struct disklabel;
     79 int	bounds_check_with_label __P((struct buf *, struct disklabel *, int));
     80 #endif
     81 
     82 #endif /* _MACHINE_DISKLABEL_H_ */
     83