summaryrefslogtreecommitdiff
path: root/usr.sbin/sysinst/mbr.h
blob: f7958379c73fd8e33b29e02cfdf6f950db0f303e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
/*	$NetBSD: mbr.h,v 1.6 2020/10/12 16:14:32 martin Exp $	*/

/*
 * Copyright 1997, 1988 Piermont Information Systems Inc.
 * All rights reserved.
 *
 * Written by Philip A. Nelson for Piermont Information Systems Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of Piermont Information Systems Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef _MBR_H
#define _MBR_H

/*
 * mbr.h -- definitions for reading, writing and editing DOS MBRs.
 * Use by including from md.h on ports  which use MBRs (i386, powerpc, arc)
 * naming convention:  dlxxxx => NetBSD disklabel, bxxxx => bios
 */

/* constants and defines */

#include <sys/bootblock.h>

/*
 * XXX  I (dsl) haven't the foggiest idea what the MBR extended chain
 *	looks like if the sector size isn't 512.
 */
#define MBR_SECSIZE     512

#define MBR_PUT_LSCYL(c)		((c) & 0xff)
#define MBR_PUT_MSCYLANDSEC(c,s)	(((s) & 0x3f) | (((c) >> 2) & 0xc0))

#define MBR_DEV_LEN	16		/* for wedge names */

typedef struct mbr_info_t mbr_info_t;
struct mbr_info_t {
	struct mbr_sector	mbr;
#ifdef BOOTSEL
	struct mbr_bootsel	mbrb;	/* writeable for any mbr code */
	uint		oflags;
#endif
	uint		sector;		/* where we read this from */
	mbr_info_t	*extended;	/* next in extended partition list */
	const char	*last_mounted[MBR_PART_COUNT];
	uint		fs_type[MBR_PART_COUNT], fs_sub_type[MBR_PART_COUNT];
#ifdef BOOTSEL
	/* only in first item... */
	uint		bootsec;	/* start sector of bootmenu default */
#endif
	/* for temporary access */
	char		wedge[MBR_PART_COUNT][MBR_DEV_LEN];
};

#ifdef BOOTSEL
extern struct mbr_bootsel *mbs;

	/* sync with src/sbin/fdisk/fdisk.c */
#define	DEFAULT_BOOTDIR		"/usr/mdec"
#define	DEFAULT_BOOTCODE	"mbr"
#define	DEFAULT_BOOTSELCODE	"mbr_bootsel"
#define	DEFAULT_BOOTEXTCODE	"mbr_ext"

/* Scan values for the various keys we use, as returned by the BIOS */
#define	SCAN_ENTER	0x1c
#define	SCAN_F1		0x3b
#define	SCAN_1		0x2

#endif /* BOOTSEL */

/* from mbr.c */
void	set_fdisk_geom(void);	/* edit incore BIOS geometry */
void	disp_cur_geom(void);
int	check_geom(void);		/* primitive geometry sanity-check */

void	disp_cur_part(struct mbr_partition *, int, int);
int 	partsoverlap(struct mbr_partition *, int, int);

/* from mbr.c */

int	guess_biosgeom_from_parts(struct disk_partitions*, int *, int *, int *);
/* same return values as edit_outer_parts() */
int	set_bios_geom_with_mbr_guess(struct disk_partitions*);
void	set_bios_geom(struct disk_partitions *, int *cyl, int *head, int *sec);
int	otherpart(int);
int	ourpart(int);
void	edit_ptn_bounds(void);
#ifdef BOOTSEL
void	disp_bootsel(void);
void	edit_bootsel_entry(int);
void	edit_bootsel_timeout(void);
void	edit_bootsel_default_ptn(int);
void	edit_bootsel_default_disk(int);
void	configure_bootsel(void);
#endif

/*
 * MBR specific: check if the chosen partitioning will work
 * and perform any MD queries/fixup.
 * With quiet = true, try to avoid user interaction and
 * never return 1.
 *
 * Return value:
 *  0 -> abort
 *  1 -> re-edit
 *  2 -> continue installation
*/
int	md_check_mbr(struct disk_partitions*, mbr_info_t*, bool quiet);

/*
 * Called early during updates (before md_pre_update),
 * returns true if partitions have been modified.
 */
bool	md_mbr_update_check(struct disk_partitions*, mbr_info_t*);

#endif