text: /*	$OpenBSD: disklabel.h,v 1.1 1998/08/22 08:54:18 smurph Exp $ */
  /*
   * Copyright (c) 1996 Nivas Madhur
   * Copyright (c) 1995 Dale Rahn.
   * All rights reserved.
   *   
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *   This product includes software developed by Dale Rahn.
   * 4. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */  
  
  #ifndef _MACHINE_DISKLABEL_H_
  #define _MACHINE_DISKLABEL_H_
  
  /* number of boot pieces , ie xxboot bootxx */
  #define NUMBOOT		2
  
  #define	PARTITIONSHIFT	4
  
  #define LABELSECTOR     0                       /* sector containing label */
  #define LABELOFFSET	0			/* offset of label in sector */
  #define MAXPARTITIONS	(1 << PARTITIONSHIFT)	/* number of partitions */
  #define RAW_PART	2			/* raw partition: xx?c */
  
  /* 
   * used to encode disk minor numbers
   * this should probably be moved to sys/disklabel.h
   */
  #define DISKUNIT(dev)	(minor(dev) / MAXPARTITIONS)
  #define DISKPART(dev)	(minor(dev) % MAXPARTITIONS)
  #define MAKEDISKDEV(maj, unit, part) \
      (makedev((maj), ((unit) * MAXPARTITIONS) + (part)))
  
  /*
   * Note: this structure is exactly 512 bytes in size. If you move fields
   * around, make sure the various members are properly aligned and the
   * compiler won't do any additional padding.
   */
  
  struct cpu_disklabel {
  	/* VID */
  	u_char		vid_id[4];
  	u_char		vid_0[16];
  	u_int		vid_oss;
  	u_short		vid_osl;
  	u_char		vid_1[4];
  	u_short		vid_osa_u;
  	u_short		vid_osa_l;
  	u_char		version;
  	u_char		vid_2[1];
  	u_short		checksum;	/* 2 */
  	u_short		partitions;
  	u_char		vid_vd[16];
  	u_long		bbsize;
  	u_long		magic1;		/* 4 */
  	u_short		type;		/* 2 */
  	u_short		subtype;	/* 2 */
  	u_char		packname[16];	/* 16 */
  	u_long		flags;		/* 4 */
  	u_long		drivedata[5];	/* 4 */
  	u_long		spare[5];	/* 4 */
  
  	u_long		secpercyl;	/* 4 */
  	u_long		secperunit;	/* 4 */
  	u_long		headswitch;	/* 4 */
  
  	u_char		vid_3[4];
  	u_int		vid_cas;
  	u_char		vid_cal;
  	u_char		vid_4_0[3];
  	u_char		vid_4[64];
  	u_char		vid_4_1[28];
  	u_long		sbsize;
  	u_char		vid_mot[8];
  
  	/* CFG */
  	u_char		cfg_0[4];
  	u_short		cfg_atm;
  	u_short		cfg_prm;
  	u_short		cfg_atw;
  	u_short		cfg_rec;
  
  	u_short		sparespertrack;
  	u_short		sparespercyl;
  	u_long		acylinders;
  	u_short		rpm;
  	u_short		cylskew;
  
  	u_char		cfg_spt;
  	u_char		cfg_hds;
  	u_short		cfg_trk;
  	u_char		cfg_ilv;
  	u_char		cfg_sof;
  	u_short		cfg_psm;
  	u_short		cfg_shd;
  	u_char		cfg_2[2];
  	u_short		cfg_pcom;
  	u_char		cfg_3;
  	u_char		cfg_ssr;
  	u_short		cfg_rwcc;
  	u_short		cfg_ecc;
  	u_short		cfg_eatm;
  	u_short		cfg_eprm;
  	u_short		cfg_eatw;
  	u_char		cfg_gpb1;
  	u_char		cfg_gpb2;
  	u_char		cfg_gpb3;
  	u_char		cfg_gpb4;
  	u_char		cfg_ssc;
  	u_char		cfg_runit;
  	u_short		cfg_rsvc1;
  	u_short		cfg_rsvc2;
  	u_long		magic2;
  	u_char		cfg_4[192];
  };
  #endif _MACHINE_DISKLABEL_H_
  