1 /* $NetBSD: mbr.h,v 1.3 2019/06/19 17:32:31 martin Exp $ */ 2 3 /* 4 * Copyright 1997, 1988 Piermont Information Systems Inc. 5 * All rights reserved. 6 * 7 * Written by Philip A. Nelson for Piermont Information Systems Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of Piermont Information Systems Inc. may not be used to endorse 18 * or promote products derived from this software without specific prior 19 * written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS'' 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE 25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 31 * THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #ifndef _MBR_H 36 #define _MBR_H 37 38 /* 39 * mbr.h -- definitions for reading, writing and editing DOS MBRs. 40 * Use by including from md.h on ports which use MBRs (i386, powerpc, arc) 41 * naming convention: dlxxxx => NetBSD disklabel, bxxxx => bios 42 */ 43 44 /* constants and defines */ 45 46 #include <sys/bootblock.h> 47 48 /* 49 * XXX I (dsl) haven't the foggiest idea what the MBR extended chain 50 * looks like if the sector size isn't 512. 51 */ 52 #define MBR_SECSIZE 512 53 54 #define MBR_PUT_LSCYL(c) ((c) & 0xff) 55 #define MBR_PUT_MSCYLANDSEC(c,s) (((s) & 0x3f) | (((c) >> 2) & 0xc0)) 56 57 typedef struct mbr_info_t mbr_info_t; 58 struct mbr_info_t { 59 struct mbr_sector mbr; 60 #ifdef BOOTSEL 61 struct mbr_bootsel mbrb; /* writeable for any mbr code */ 62 uint oflags; 63 #endif 64 uint sector; /* where we read this from */ 65 mbr_info_t *extended; /* next in extended partition list */ 66 const char *last_mounted[MBR_PART_COUNT]; 67 uint fs_type[MBR_PART_COUNT], fs_sub_type[MBR_PART_COUNT]; 68 #ifdef BOOTSEL 69 /* only in first item... */ 70 uint bootsec; /* start sector of bootmenu default */ 71 #endif 72 }; 73 74 #ifdef BOOTSEL 75 struct mbr_bootsel *mbs; 76 77 /* sync with src/sbin/fdisk/fdisk.c */ 78 #define DEFAULT_BOOTDIR "/usr/mdec" 79 #define DEFAULT_BOOTCODE "mbr" 80 #define DEFAULT_BOOTSELCODE "mbr_bootsel" 81 #define DEFAULT_BOOTEXTCODE "mbr_ext" 82 83 /* Scan values for the various keys we use, as returned by the BIOS */ 84 #define SCAN_ENTER 0x1c 85 #define SCAN_F1 0x3b 86 #define SCAN_1 0x2 87 88 #endif /* BOOTSEL */ 89 90 /* from mbr.c */ 91 void set_fdisk_geom(void); /* edit incore BIOS geometry */ 92 void disp_cur_geom(void); 93 int check_geom(void); /* primitive geometry sanity-check */ 94 95 void disp_cur_part(struct mbr_partition *, int, int); 96 int partsoverlap(struct mbr_partition *, int, int); 97 98 /* from mbr.c */ 99 100 int guess_biosgeom_from_parts(struct disk_partitions*, int *, int *, int *); 101 bool set_bios_geom_with_mbr_guess(struct disk_partitions*); 102 void set_bios_geom(struct disk_partitions *, int *cyl, int *head, int *sec); 103 int otherpart(int); 104 int ourpart(int); 105 void edit_ptn_bounds(void); 106 #ifdef BOOTSEL 107 void disp_bootsel(void); 108 void edit_bootsel_entry(int); 109 void edit_bootsel_timeout(void); 110 void edit_bootsel_default_ptn(int); 111 void edit_bootsel_default_disk(int); 112 void configure_bootsel(void); 113 #endif 114 115 /* 116 * MBR specific: check if the chosen partitioning will work 117 * and perform any MD queries/fixup. 118 * With quiet = true, try to avoid user interaction and 119 * never return 1. 120 * 121 * Return value: 122 * 0 -> abort 123 * 1 -> re-edit 124 * 2 -> continue installation 125 */ 126 int md_check_mbr(struct disk_partitions*, mbr_info_t*, bool quiet); 127 128 /* 129 * Called early during updates (before md_pre_update), 130 * returns true if partitions have been modified. 131 */ 132 bool md_mbr_update_check(struct disk_partitions*, mbr_info_t*); 133 134 #endif 135