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disklabel.h revision 1.11 
      1 /*	$NetBSD: disklabel.h,v 1.11 2011/08/30 12:39:56 bouyer Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Dale Rahn.
      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. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #ifndef _MACHINE_DISKLABEL_H_
     31 #define _MACHINE_DISKLABEL_H_
     32 
     33 /* number of boot pieces , ie xxboot bootxx */
     34 #define NUMBOOT		0
     35 
     36 #define LABELUSESMBR	0			/* no MBR partitionning */
     37 #define LABELSECTOR     0                       /* sector containing label */
     38 #define LABELOFFSET	0			/* offset of label in sector */
     39 #define MAXPARTITIONS	8			/* number of partitions */
     40 #define RAW_PART	2			/* raw partition: xx?c */
     41 
     42 /*
     43  * a cpu_disklabel is a disklabel that the bug (prom) can understand
     44  * and live with.   the bug works in terms of 256 byte blocks.   in our
     45  * case the first two bug blocks make up the cpu_disklabel (which is 512
     46  * bytes [i.e. one sector] in length).
     47  *
     48  * we use a fixed layout the BSD disk structure (in 256 byte blocks):
     49  *   block 0  = the volume ID block  (part of cpu_disklabel)
     50  *   block 1  = media configuration area (part of cpu_disklabel)
     51  *   block 2  = start of first level OS bootstrap (continues ...)
     52  *   block 31 = end of OS bootstrap
     53  *   block 32 = BSD filesystem superblock
     54  *
     55  * this gives us 30 blocks (30*256 = 7680 bytes) for the bootstrap's text+data
     56  *
     57  * disksubr.c translates between cpu_disklabel and BSD disklabel.
     58  *
     59  */
     60 
     61 struct cpu_disklabel {
     62 	/* VID */
     63 	u_char  vid_id[4];	/* volume ID */
     64 #define VID_ID		"NBSD"
     65 	u_char  vid_0[16];
     66 	u_int   vid_oss;	/* starting block # of bootstrap */
     67 #define VID_OSS		2
     68 	u_short	vid_osl;	/* bootstrap length (30 blocks) */
     69 #define VID_OSL		30
     70 	u_char	vid_1[4];
     71 	u_short	vid_osa_u;	/* bootstrap start address (upper) */
     72 	u_short	vid_osa_l;	/* bootstrap start address (lower) */
     73 #define VID_OSA		0x3f0000	/* MUST match bootstrap code */
     74 #define VID_OSAU	((VID_OSA >> 16) & 0xffff)
     75 #define VID_OSAL	(VID_OSA & 0xffff)
     76 	u_char	vid_2[2];
     77 	u_short	partitions;
     78 	u_char	vid_vd[16];
     79 	u_long	bbsize;
     80 	u_long	magic1;		/* 4 */
     81 	u_short	type;		/* 2 */
     82 	u_short	subtype;	/* 2 */
     83 	u_char	packname[16];	/* 16 */
     84 	u_long	flags;		/* 4 */
     85 	u_long	drivedata[5];	/* 4 */
     86 	u_long	spare[5];	/* 4 */
     87 	u_short	checksum;	/* 2 */
     88 
     89 	u_long	secpercyl;	/* 4 */
     90 	u_long	secperunit;	/* 4 */
     91 	u_long	headswitch;	/* 4 */
     92 
     93 	u_char	vid_3[4];
     94 	u_int	vid_cas;	/* block # of CFG area, hardwired at 1 */
     95 #define VID_CAS		1
     96 	u_char	vid_cal;	/* length of CFG area, in blocks (1) */
     97 #define VID_CAL		1
     98 	u_char	vid_4_0[3];
     99 	u_char	vid_4[64];
    100 	u_char	vid_4_1[28];
    101 	u_long	sbsize;
    102 	u_char	vid_mot[8];	/* must contain "MOTOROLA" */
    103 #define VID_MOT		"MOTOROLA"
    104 
    105 	/* CFG */
    106 	u_char	cfg_0[4];
    107 	u_short	cfg_atm;
    108 	u_short	cfg_prm;
    109 	u_short	cfg_atw;
    110 	u_short	cfg_rec;	/* block size (256) */
    111 #define	CFG_REC		256
    112 
    113 	u_short	sparespertrack;
    114 	u_short	sparespercyl;
    115 	u_long	acylinders;
    116 	u_short	rpm;
    117 	u_short	cylskew;
    118 
    119 	u_char	cfg_spt;
    120 	u_char	cfg_hds;
    121 	u_short	cfg_trk;
    122 	u_char	cfg_ilv;
    123 	u_char	cfg_sof;
    124 	u_short	cfg_psm;	/* physical sector size (512) */
    125 #define CFG_PSM		512
    126 	u_short	cfg_shd;
    127 	u_char	cfg_2[2];
    128 	u_short	cfg_pcom;
    129 	u_char	cfg_3;
    130 	u_char	cfg_ssr;
    131 	u_short	cfg_rwcc;
    132 	u_short	cfg_ecc;
    133 	u_short	cfg_eatm;
    134 	u_short	cfg_eprm;
    135 	u_short	cfg_eatw;
    136 	u_char	cfg_gpb1;
    137 	u_char	cfg_gpb2;
    138 	u_char	cfg_gpb3;
    139 	u_char	cfg_gpb4;
    140 	u_char	cfg_ssc;
    141 	u_char	cfg_runit;
    142 	u_short	cfg_rsvc1;
    143 	u_short	cfg_rsvc2;
    144 	u_long	magic2;
    145 	u_char	cfg_4[192];
    146 } __attribute__((__packed__));
    147 #endif /* _MACHINE_DISKLABEL_H_ */
    148