140 lines
4.5 KiB
C
140 lines
4.5 KiB
C
/* $NetBSD: mbr.h,v 1.6 2020/10/12 16:14:32 martin Exp $ */
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/*
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* Copyright 1997, 1988 Piermont Information Systems Inc.
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* All rights reserved.
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*
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* Written by Philip A. Nelson for Piermont Information Systems Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of Piermont Information Systems Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _MBR_H
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#define _MBR_H
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/*
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* mbr.h -- definitions for reading, writing and editing DOS MBRs.
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* Use by including from md.h on ports which use MBRs (i386, powerpc, arc)
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* naming convention: dlxxxx => NetBSD disklabel, bxxxx => bios
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*/
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/* constants and defines */
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#include <sys/bootblock.h>
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/*
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* XXX I (dsl) haven't the foggiest idea what the MBR extended chain
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* looks like if the sector size isn't 512.
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*/
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#define MBR_SECSIZE 512
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#define MBR_PUT_LSCYL(c) ((c) & 0xff)
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#define MBR_PUT_MSCYLANDSEC(c,s) (((s) & 0x3f) | (((c) >> 2) & 0xc0))
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#define MBR_DEV_LEN 16 /* for wedge names */
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typedef struct mbr_info_t mbr_info_t;
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struct mbr_info_t {
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struct mbr_sector mbr;
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#ifdef BOOTSEL
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struct mbr_bootsel mbrb; /* writeable for any mbr code */
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uint oflags;
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#endif
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uint sector; /* where we read this from */
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mbr_info_t *extended; /* next in extended partition list */
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const char *last_mounted[MBR_PART_COUNT];
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uint fs_type[MBR_PART_COUNT], fs_sub_type[MBR_PART_COUNT];
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#ifdef BOOTSEL
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/* only in first item... */
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uint bootsec; /* start sector of bootmenu default */
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#endif
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/* for temporary access */
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char wedge[MBR_PART_COUNT][MBR_DEV_LEN];
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};
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#ifdef BOOTSEL
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extern struct mbr_bootsel *mbs;
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/* sync with src/sbin/fdisk/fdisk.c */
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#define DEFAULT_BOOTDIR "/usr/mdec"
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#define DEFAULT_BOOTCODE "mbr"
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#define DEFAULT_BOOTSELCODE "mbr_bootsel"
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#define DEFAULT_BOOTEXTCODE "mbr_ext"
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/* Scan values for the various keys we use, as returned by the BIOS */
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#define SCAN_ENTER 0x1c
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#define SCAN_F1 0x3b
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#define SCAN_1 0x2
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#endif /* BOOTSEL */
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/* from mbr.c */
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void set_fdisk_geom(void); /* edit incore BIOS geometry */
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void disp_cur_geom(void);
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int check_geom(void); /* primitive geometry sanity-check */
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void disp_cur_part(struct mbr_partition *, int, int);
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int partsoverlap(struct mbr_partition *, int, int);
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/* from mbr.c */
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int guess_biosgeom_from_parts(struct disk_partitions*, int *, int *, int *);
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/* same return values as edit_outer_parts() */
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int set_bios_geom_with_mbr_guess(struct disk_partitions*);
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void set_bios_geom(struct disk_partitions *, int *cyl, int *head, int *sec);
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int otherpart(int);
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int ourpart(int);
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void edit_ptn_bounds(void);
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#ifdef BOOTSEL
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void disp_bootsel(void);
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void edit_bootsel_entry(int);
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void edit_bootsel_timeout(void);
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void edit_bootsel_default_ptn(int);
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void edit_bootsel_default_disk(int);
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void configure_bootsel(void);
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#endif
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/*
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* MBR specific: check if the chosen partitioning will work
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* and perform any MD queries/fixup.
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* With quiet = true, try to avoid user interaction and
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* never return 1.
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*
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* Return value:
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* 0 -> abort
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* 1 -> re-edit
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* 2 -> continue installation
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*/
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int md_check_mbr(struct disk_partitions*, mbr_info_t*, bool quiet);
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/*
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* Called early during updates (before md_pre_update),
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* returns true if partitions have been modified.
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*/
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bool md_mbr_update_check(struct disk_partitions*, mbr_info_t*);
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#endif
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