1/*	$NetBSD: disklabel.h,v 1.1 2013/07/18 22:08:59 matt 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	1			/* no MBR partitionning */
37#define LABELSECTOR     1                       /* sector containing label */
38#define LABELOFFSET	0			/* offset of label in sector */
39#define MAXPARTITIONS	16			/* 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
61struct 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