/*      $NetBSD: disklabel.h,v 1.11 2011/08/30 12:39:56 bouyer Exp $    */

/*
 * 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. 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         0

#define LABELUSESMBR    0                       /* no MBR partitionning */
#define LABELSECTOR     0                       /* sector containing label */
#define LABELOFFSET     0                       /* offset of label in sector */
#define MAXPARTITIONS   8                       /* number of partitions */
#define RAW_PART        2                       /* raw partition: xx?c */

/*
 * a cpu_disklabel is a disklabel that the bug (prom) can understand
 * and live with.   the bug works in terms of 256 byte blocks.   in our
 * case the first two bug blocks make up the cpu_disklabel (which is 512
 * bytes [i.e. one sector] in length).
 *
 * we use a fixed layout the BSD disk structure (in 256 byte blocks):
 *   block 0  = the volume ID block  (part of cpu_disklabel)
 *   block 1  = media configuration area (part of cpu_disklabel)
 *   block 2  = start of first level OS bootstrap (continues ...)
 *   block 31 = end of OS bootstrap
 *   block 32 = BSD filesystem superblock
 *
 * this gives us 30 blocks (30*256 = 7680 bytes) for the bootstrap's text+data
 *
 * disksubr.c translates between cpu_disklabel and BSD disklabel.
 *
 */

struct cpu_disklabel {
        /* VID */
        u_char  vid_id[4];      /* volume ID */
#define VID_ID          "NBSD"
        u_char  vid_0[16];
        u_int   vid_oss;        /* starting block # of bootstrap */
#define VID_OSS         2
        u_short vid_osl;        /* bootstrap length (30 blocks) */
#define VID_OSL         30
        u_char  vid_1[4];
        u_short vid_osa_u;      /* bootstrap start address (upper) */
        u_short vid_osa_l;      /* bootstrap start address (lower) */
#define VID_OSA         0x3f0000        /* MUST match bootstrap code */
#define VID_OSAU        ((VID_OSA >> 16) & 0xffff)
#define VID_OSAL        (VID_OSA & 0xffff)
        u_char  vid_2[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_short checksum;       /* 2 */

        u_long  secpercyl;      /* 4 */
        u_long  secperunit;     /* 4 */
        u_long  headswitch;     /* 4 */

        u_char  vid_3[4];
        u_int   vid_cas;        /* block # of CFG area, hardwired at 1 */
#define VID_CAS         1
        u_char  vid_cal;        /* length of CFG area, in blocks (1) */
#define VID_CAL         1
        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];     /* must contain "MOTOROLA" */
#define VID_MOT         "MOTOROLA"

        /* CFG */
        u_char  cfg_0[4];
        u_short cfg_atm;
        u_short cfg_prm;
        u_short cfg_atw;
        u_short cfg_rec;        /* block size (256) */
#define CFG_REC         256

        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;        /* physical sector size (512) */
#define CFG_PSM         512
        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];
} __attribute__((__packed__));
#endif /* _MACHINE_DISKLABEL_H_ */