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/* $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
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