152 lines
4.9 KiB
C
152 lines
4.9 KiB
C
/* $NetBSD: disklabel.h,v 1.6 2000/12/01 00:02:22 scw Exp $ */
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/*
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* Copyright (c) 1995 Dale Rahn.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Dale Rahn.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MACHINE_DISKLABEL_H_
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#define _MACHINE_DISKLABEL_H_
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/* number of boot pieces , ie xxboot bootxx */
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#define NUMBOOT 0
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#define PARTITIONSHIFT 3 /* could also be 4 if you need 16 partitions */
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#define LABELSECTOR 0 /* sector containing label */
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#define LABELOFFSET 0 /* offset of label in sector */
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#define MAXPARTITIONS (1 << PARTITIONSHIFT) /* number of partitions */
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#define RAW_PART 2 /* raw partition: xx?c */
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/*
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* a cpu_disklabel is a disklabel that the bug (prom) can understand
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* and live with. the bug works in terms of 256 byte blocks. in our
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* case the first two bug blocks make up the cpu_disklabel (which is 512
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* bytes [i.e. one sector] in length).
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*
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* we use a fixed layout the BSD disk structure (in 256 byte blocks):
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* block 0 = the volume ID block (part of cpu_disklabel)
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* block 1 = media configuration area (part of cpu_disklabel)
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* block 2 = start of first level OS bootstrap (continues ...)
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* block 31 = end of OS bootstrap
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* block 32 = BSD filesystem superblock
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*
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* this gives us 30 blocks (30*256 = 7680 bytes) for the bootstrap's text+data
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*
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* disksubr.c translates between cpu_disklabel and BSD disklabel.
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*
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*/
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struct cpu_disklabel {
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/* VID */
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u_char vid_id[4]; /* volume ID */
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#define VID_ID "NBSD"
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u_char vid_0[16];
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u_int vid_oss; /* starting block # of bootstrap */
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#define VID_OSS 2
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u_short vid_osl; /* bootstrap length (30 blocks) */
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#define VID_OSL 30
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u_char vid_1[4];
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u_short vid_osa_u; /* bootstrap start address (upper) */
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u_short vid_osa_l; /* bootstrap start address (lower) */
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#define VID_OSA 0x3f0000 /* MUST match bootstrap code */
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#define VID_OSAU ((VID_OSA >> 16) & 0xffff)
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#define VID_OSAL (VID_OSA & 0xffff)
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u_char vid_2[2];
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u_short partitions;
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u_char vid_vd[16];
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u_long bbsize;
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u_long magic1; /* 4 */
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u_short type; /* 2 */
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u_short subtype; /* 2 */
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u_char packname[16]; /* 16 */
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u_long flags; /* 4 */
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u_long drivedata[5]; /* 4 */
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u_long spare[5]; /* 4 */
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u_short checksum; /* 2 */
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u_long secpercyl; /* 4 */
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u_long secperunit; /* 4 */
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u_long headswitch; /* 4 */
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u_char vid_3[4];
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u_int vid_cas; /* block # of CFG area, hardwired at 1 */
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#define VID_CAS 1
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u_char vid_cal; /* length of CFG area, in blocks (1) */
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#define VID_CAL 1
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u_char vid_4_0[3];
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u_char vid_4[64];
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u_char vid_4_1[28];
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u_long sbsize;
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u_char vid_mot[8]; /* must contain "MOTOROLA" */
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#define VID_MOT "MOTOROLA"
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/* CFG */
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u_char cfg_0[4];
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u_short cfg_atm;
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u_short cfg_prm;
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u_short cfg_atw;
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u_short cfg_rec; /* block size (256) */
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#define CFG_REC 256
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u_short sparespertrack;
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u_short sparespercyl;
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u_long acylinders;
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u_short rpm;
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u_short cylskew;
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u_char cfg_spt;
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u_char cfg_hds;
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u_short cfg_trk;
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u_char cfg_ilv;
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u_char cfg_sof;
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u_short cfg_psm; /* physical sector size (512) */
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#define CFG_PSM 512
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u_short cfg_shd;
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u_char cfg_2[2];
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u_short cfg_pcom;
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u_char cfg_3;
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u_char cfg_ssr;
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u_short cfg_rwcc;
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u_short cfg_ecc;
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u_short cfg_eatm;
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u_short cfg_eprm;
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u_short cfg_eatw;
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u_char cfg_gpb1;
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u_char cfg_gpb2;
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u_char cfg_gpb3;
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u_char cfg_gpb4;
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u_char cfg_ssc;
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u_char cfg_runit;
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u_short cfg_rsvc1;
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u_short cfg_rsvc2;
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u_long magic2;
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u_char cfg_4[192];
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} __attribute__((__packed__));
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#endif _MACHINE_DISKLABEL_H_
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