1/*
2 * Copyright (c) 1995 Leo Weppelman.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef AHDI_H
27#define AHDI_H
28
29#define	AHDI_BSIZE	512		/* AHDI blocksize		*/
30#define	AHDI_BBLOCK	0		/* AHDI bootblock (root sector)	*/
31
32/*
33 * Various `well known' AHDI partition identifiers.
34 */
35#define AHDI_MKPID(x,y,z)	(   ((u_int32_t)(x) << 16)	\
36				  | ((u_int32_t)(y) << 8)	\
37				  | ((u_int32_t)(z))		\
38				)
39#define	AHDI_PID_XGM	AHDI_MKPID('X','G','M')
40#define	AHDI_PID_GEM	AHDI_MKPID('G','E','M')
41#define	AHDI_PID_BGM	AHDI_MKPID('B','G','M')
42#define	AHDI_PID_RAW	AHDI_MKPID('R','A','W')
43#define	AHDI_PID_SWP	AHDI_MKPID('S','W','P')
44#define	AHDI_PID_NBD	AHDI_MKPID('N','B','D')
45#define	AHDI_PID_NBR	AHDI_MKPID('N','B','R')
46#define	AHDI_PID_NBS	AHDI_MKPID('N','B','S')
47#define	AHDI_PID_NBU	AHDI_MKPID('N','B','U')
48
49/*
50 * Format of AHDI boot block.
51 */
52#define	AHDI_MAXRPD	4		/* max. # of partition descriptors */
53					/* in an AHDI bootblock (aka root) */
54#define	AHDI_MAXARPD	2		/* max. # of partition descriptors */
55
56/*
57 * On-disk representation of the AHDI disklabel.
58 */
59struct ahdi_part {
60	u_int8_t	ap_flg;		/* bit 0 is in-use flag            */
61	u_int8_t	ap_id[3];	/* id: GEM, BGM, XGM, UNX, MIX     */
62	u_int32_t	ap_st;		/* block where partition starts    */
63	u_int32_t	ap_size;	/* partition size in blocks        */
64};
65
66struct ahdi_root {
67	u_int8_t	 ar_fill[0x1c2];/* filler, can be boot code        */
68	u_int32_t	 ar_hdsize;	/* size of entire volume in blocks */
69	struct ahdi_part ar_parts[AHDI_MAXRPD]; /* root partition table    */
70	u_int32_t	 ar_bslst;	/* start of bad-sector list        */
71	u_int32_t	 ar_bslsize;	/* # of blocks in bad-sector list  */
72	u_int16_t	 ar_checksum;
73};
74
75/*
76 * Partition table representation as generated by ahdi_getparts():
77 */
78typedef struct {
79	char	id[4];
80	u_int	start;
81	u_int	end;
82	u_int	rsec;
83	u_int	rent;
84	int	mod;
85} part_t;
86
87typedef struct {
88	int	nparts;
89	part_t	*parts;
90} ptable_t;
91
92/*
93 * Functions exported from ahdi.c
94 */
95EXTERN u_int ahdi_getparts PROTO((disk_t *, ptable_t *, u_int, u_int));
96#endif /*  AHDI_H */
97