disklabel.h revision 1.4 
1/*	$OpenBSD: disklabel.h,v 1.4 2002/09/15 09:01:58 deraadt Exp $	*/
2
3/*
4 * Copyright (c) 1994 Christopher G. Demetriou
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. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Christopher G. Demetriou.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#ifndef _MACHINE_DISKLABEL_H_
34#define _MACHINE_DISKLABEL_H_
35
36#define	LABELSECTOR	1		/* sector containing label */
37#define	LABELOFFSET	0		/* offset of label in sector */
38#define	MAXPARTITIONS	16		/* number of partitions */
39#define	RAW_PART	2		/* raw partition: ie. rsd0c */
40
41/* MBR partition table */
42#define	DOSBBSECTOR	0		/* MBR sector number */
43#define	DOSPARTOFF	446		/* Offset of MBR partition table */
44#define	NDOSPART	4		/* # of partitions in MBR */
45#define	DOSMAGICOFF	510		/* Offset of magic number */
46#define	DOSMAGIC	0xaa55		/* Actual magic number */
47#define	MBRMAGIC	DOSMAGIC
48#define DOSMBR_SIGNATURE MBRMAGIC
49#define DOSMBR_SIGNATURE_OFF DOSMAGICOFF
50#define	DOSACTIVE	0x80
51
52struct dos_partition {
53	unsigned char	dp_flag;	/* default boot flag */
54	unsigned char	dp_shd;	/* start head, IsN't Always Meaningful */
55	unsigned char	dp_ssect;	/* start sector, INAM */
56	unsigned char	dp_scyl;	/* start cylinder, INAM */
57	unsigned char	dp_typ;		/* partition type */
58	unsigned char	dp_ehd;	/* end head, INAM */
59	unsigned char	dp_esect;	/* end sector, INAM */
60	unsigned char	dp_ecyl;	/* end cylinder, INAM */
61	unsigned long	dp_start;	/* absolute start sector number */
62	unsigned long	dp_size;	/* partition size in sectors */
63};
64
65/* Known DOS partition types. */
66#define	DOSPTYP_UNUSED	0x00		/* Unused partition */
67#define DOSPTYP_FAT12	0x01		/* 12-bit FAT */
68#define DOSPTYP_FAT16S	0x04		/* 16-bit FAT, less than 32M */
69#define DOSPTYP_EXTEND	0x05		/* Extended; contains sub-partitions */
70#define DOSPTYP_FAT16B	0x06		/* 16-bit FAT, more than 32M */
71#define DOSPTYP_FAT32	0x0b		/* 32-bit FAT */
72#define DOSPTYP_FAT32L	0x0c		/* 32-bit FAT, LBA-mapped */
73#define DOSPTYP_FAT16C	0x0e		/* 16-bit FAT, CHS-mapped */
74#define DOSPTYP_EXTENDL 0x0f		/* Extended, LBA-mapped; contains sub-partitions */
75#define DOSPTYP_ONTRACK	0x54
76#define	DOSPTYP_LINUX	0x83		/* That other thing */
77#define DOSPTYP_FREEBSD	0xa5		/* FreeBSD partition type */
78#define DOSPTYP_OPENBSD	0xa6		/* OpenBSD partition type */
79#define DOSPTYP_NETBSD	0xa9		/* NetBSD partition type */
80
81#include <sys/dkbad.h>
82
83/* Isolate the relevant bits to get sector and cylinder. */
84#define	DPSECT(s)	((s) & 0x3f)
85#define	DPCYL(c, s)	((c) + (((s) & 0xc0) << 2))
86
87static __inline u_int32_t get_le(void *p);
88
89static __inline u_int32_t
90#ifdef __cplusplus
91get_le(void *p)
92#else
93get_le(p)
94	void *p;
95#endif
96{
97	u_int8_t *_p = (u_int8_t *)p;
98	int x;
99	x = _p[0];
100	x |= _p[1] << 8;
101	x |= _p[2] << 16;
102	x |= _p[3] << 24;
103	return x;
104}
105
106/* HFS/DPME */
107
108/* partition map structure from Inside Macintosh: Devices, SCSI Manager
109 * pp. 13-14.  The partition map always begins on physical block 1.
110 *
111 * With the exception of block 0, all blocks on the disk must belong to
112 * exactly one partition.  The partition map itself belongs to a partition
113 * of type `APPLE_PARTITION_MAP', and is not limited in size by anything
114 * other than available disk space.  The partition map is not necessarily
115 * the first partition listed.
116 */
117struct part_map_entry {
118#define PART_ENTRY_MAGIC        0x504d
119	u_int16_t       pmSig;          /* partition signature */
120	u_int16_t       pmSigPad;       /* (reserved) */
121	u_int32_t       pmMapBlkCnt;    /* number of blocks in partition map */
122	u_int32_t       pmPyPartStart;  /* first physical block of partition */
123	u_int32_t       pmPartBlkCnt;   /* number of blocks in partition */
124	char            pmPartName[32]; /* partition name */
125	char            pmPartType[32]; /* partition type */
126	u_int32_t       pmLgDataStart;  /* first logical block of data area */
127	u_int32_t       pmDataCnt;      /* number of blocks in data area */
128	u_int32_t       pmPartStatus;   /* partition status information */
129	u_int32_t       pmLgBootStart;  /* first logical block of boot code */
130	u_int32_t       pmBootSize;     /* size of boot code, in bytes */
131	u_int32_t       pmBootLoad;     /* boot code load address */
132	u_int32_t       pmBootLoad2;    /* (reserved) */
133	u_int32_t       pmBootEntry;    /* boot code entry point */
134	u_int32_t       pmBootEntry2;   /* (reserved) */
135	u_int32_t       pmBootCksum;    /* boot code checksum */
136	char            pmProcessor[16]; /* processor type (e.g. "68020") */
137	u_int8_t        pmBootArgs[128]; /* A/UX boot arguments */
138	/* we do not index the disk image as an array,
139	 * leave out the on disk padding
140	 */
141#if 0
142	u_int8_t        pad[248];       /* pad to end of block */
143#endif
144};
145
146#define PART_TYPE_DRIVER        "APPLE_DRIVER"
147#define PART_TYPE_DRIVER43      "APPLE_DRIVER43"
148#define PART_TYPE_DRIVERATA     "APPLE_DRIVER_ATA"
149#define PART_TYPE_DRIVERIOKIT   "APPLE_DRIVER_IOKIT"
150#define PART_TYPE_FWDRIVER      "APPLE_FWDRIVER"
151#define PART_TYPE_FWB_COMPONENT "FWB DRIVER COMPONENTS"
152#define PART_TYPE_FREE          "APPLE_FREE"
153#define PART_TYPE_MAC           "APPLE_HFS"
154#define PART_TYPE_OPENBSD       "OPENBSD"
155
156
157struct cpu_disklabel {
158	struct dos_partition dosparts[NDOSPART];
159	/* only store first entry and openbsd partition */
160	struct part_map_entry macparts[2];
161	struct dkbad bad;
162};
163
164#define DKBAD(x) ((x)->bad)
165
166#endif /* _MACHINE_DISKLABEL_H_ */
167