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disklabel.h revision 1.4 
      1 /*	$NetBSD: disklabel.h,v 1.4 1995/11/30 00:58:03 jtc 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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Leo Weppelman.
     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 /*
     37  * On a volume, exclusively used by NetBSD, the boot block starts at
     38  * sector 0. To allow shared use of a volume between two or more OS's
     39  * the vendor specific AHDI format is supported. In this case the boot
     40  * block is located at the start of an AHDI partition. In any case the
     41  * size of the boot block is 8KB, the disk label is at offset 7KB.
     42  */
     43 #define LABELSECTOR	0		/* `natural' start of boot block   */
     44 #define LABELOFFSET	(7 * 1024)	/* offset of disklabel in bytes,
     45 					   relative to start of boot block */
     46 #define MAXPARTITIONS	16
     47 #define RAW_PART	2		/* xx?c is raw partition	   */
     48 
     49 #define MAX_TOS_ROOTS	61		/* max. # of auxilary root sectors */
     50 
     51 struct cpu_disklabel {
     52 	u_int32_t	cd_bblock;	/* start of NetBSD boot block      */
     53 #define NO_BOOT_BLOCK	((u_int32_t) -1)
     54 	u_int32_t	cd_bslst;	/* start of TOS bad sector list    */
     55 	u_int32_t	cd_bslsize;	/* size of TOS bad sector list     */
     56 	u_int32_t	cd_roots[MAX_TOS_ROOTS]; /* TOS root sectors       */
     57 };
     58 
     59 #endif /* _MACHINE_DISKLABEL_H_ */
     60