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/* $OpenBSD: disklabel.h,v 1.3 1996/05/10 03:18:43 chuck 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. 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 0
#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)))
/*
* 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];
};
#endif _MACHINE_DISKLABEL_H_
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