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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 /*	Copyright (c) 1984, 1986, 1987, 1988 AT&T	*/
     27 /*	  All Rights Reserved  	*/
     28 
     29 
     30 #ifndef _SYS_DKTP_FDISK_H
     31 #define	_SYS_DKTP_FDISK_H
     32 
     33 #ifdef	__cplusplus
     34 extern "C" {
     35 #endif
     36 
     37 /*
     38  * fdisk.h
     39  * This file defines the structure of physical disk sector 0 for use on
     40  * AT386 systems.  The format of this sector is constrained by the ROM
     41  * BIOS and MS-DOS conventions.
     42  * Note that this block does not define the partitions used by the unix
     43  * driver.  The unix partitions are obtained from the VTOC.
     44  */
     45 
     46 /*
     47  * the MAX values are the maximum usable values for BIOS chs values
     48  * The MAX_CYL value of 1022 is the maximum usable value
     49  *   the value of 1023 is a fence value,
     50  *   indicating no CHS geometry exists for the corresponding LBA value.
     51  * HEAD range [ 0 .. MAX_HEAD ], so number of heads is (MAX_HEAD + 1)
     52  * SECT range [ 1 .. MAX_SECT ], so number of sectors is (MAX_SECT)
     53  */
     54 #define	MAX_SECT	(63)
     55 #define	MAX_CYL		(1022)
     56 #define	MAX_HEAD	(254)
     57 
     58 /*
     59  * BOOTSZ was reduced from 446 to 440 bytes to NOT overwrite the Windows
     60  * Vista DISKID. Otherwise Vista won't boot from Solaris GRUB in a dual-boot
     61  * setup.
     62  * The actual size of mboot code is 425 bytes while that of GRUB stage1 is
     63  * 423 bytes. So this changes does not harm them.
     64  */
     65 #define	BOOTSZ		440	/* size of boot code in master boot block */
     66 #define	FD_NUMPART	4	/* number of 'partitions' in fdisk table */
     67 #define	MBB_MAGIC	0xAA55	/* magic number for mboot.signature */
     68 #define	DEFAULT_INTLV	4	/* default interleave for testing tracks */
     69 #define	MINPSIZE	4	/* minimum number of cylinders in a partition */
     70 #define	TSTPAT		0xE5	/* test pattern for verifying disk */
     71 
     72 /*
     73  * structure to hold the fdisk partition table
     74  */
     75 struct ipart {
     76 	unsigned char bootid;	/* bootable or not */
     77 	unsigned char beghead;	/* beginning head, sector, cylinder */
     78 	unsigned char begsect;	/* begcyl is a 10-bit number. High 2 bits */
     79 	unsigned char begcyl;	/*	are in begsect. */
     80 	unsigned char systid;	/* OS type */
     81 	unsigned char endhead;	/* ending head, sector, cylinder */
     82 	unsigned char endsect;	/* endcyl is a 10-bit number.  High 2 bits */
     83 	unsigned char endcyl;	/*	are in endsect. */
     84 	uint32_t relsect;	/* first sector relative to start of disk */
     85 	uint32_t numsect;	/* number of sectors in partition */
     86 };
     87 /*
     88  * Values for bootid.
     89  */
     90 #define	NOTACTIVE	0
     91 #define	ACTIVE		128
     92 /*
     93  * Values for systid.
     94  */
     95 #define	UNUSED		0	/* Empty Partition */
     96 #define	DOSOS12		1	/* DOS partition, 12-bit FAT */
     97 #define	PCIXOS		2	/* PC/IX partition */
     98 #define	DOSOS16		4	/* DOS partition, 16-bit FAT */
     99 #define	EXTDOS		5	/* EXT-DOS partition */
    100 #define	DOSHUGE		6	/* Huge DOS partition  > 32MB */
    101 #define	FDISK_IFS	7	/* Installable File System (IFS): HPFS & NTFS */
    102 #define	FDISK_AIXBOOT	8	/* AIX Boot */
    103 #define	FDISK_AIXDATA	9	/* AIX Data */
    104 #define	FDISK_OS2BOOT	10	/* OS/2 Boot Manager */
    105 #define	FDISK_WINDOWS	11	/* Windows 95 FAT32 (up to 2047GB) */
    106 #define	FDISK_EXT_WIN	12	/* Windows 95 FAT32 (extended-INT13) */
    107 #define	FDISK_FAT95	14	/* DOS 16-bit FAT, LBA-mapped */
    108 #define	FDISK_EXTLBA	15	/* Extended partition, LBA-mapped */
    109 #define	DIAGPART	18	/* Diagnostic boot partition (OS independent) */
    110 #define	FDISK_LINUX	65	/* Linux */
    111 #define	FDISK_LINUXDSWAP	66	/* Linux swap (sharing disk w/ DRDOS) */
    112 #define	FDISK_LINUXDNAT	67	/* Linux native (sharing disk with DRDOS) */
    113 #define	FDISK_CPM	82	/* CP/M */
    114 #define	DOSDATA		86	/* DOS data partition */
    115 #define	OTHEROS		98	/* part. type for appl. (DB?) needs */
    116 				/* raw partition.  ID was 0 but conflicted */
    117 				/* with DOS 3.3 fdisk    */
    118 #define	UNIXOS		99	/* UNIX V.x partition */
    119 #define	FDISK_NOVELL2	100	/* Novell Netware 286 */
    120 #define	FDISK_NOVELL3	101	/* Novell Netware 3.x and later */
    121 #define	FDISK_QNX4	119	/* QNX 4.x */
    122 #define	FDISK_QNX42	120	/* QNX 4.x 2nd part */
    123 #define	FDISK_QNX43	121	/* QNX 4.x 3rd part */
    124 #define	SUNIXOS		130	/* Solaris UNIX partition */
    125 #define	FDISK_LINUXNAT	131	/* Linux native */
    126 #define	FDISK_NTFSVOL1	134	/* NTFS volume set 1 */
    127 #define	FDISK_NTFSVOL2	135	/* NTFS volume set 2 */
    128 #define	FDISK_BSD	165	/* BSD/386, 386BSD, NetBSD, FreeBSD, OpenBSD */
    129 #define	FDISK_NEXTSTEP	167	/* NeXTSTEP */
    130 #define	FDISK_BSDIFS	183	/* BSDI file system */
    131 #define	FDISK_BSDISWAP	184	/* BSDI swap */
    132 #define	X86BOOT		190	/* x86 Solaris boot partition */
    133 #define	SUNIXOS2	191	/* Solaris UNIX partition */
    134 #define	EFI_PMBR	238	/* EFI PMBR */
    135 #define	EFI_FS		239	/* EFI File System (System Partition) */
    136 #define	MAXDOS		65535L	/* max size (sectors) for DOS partition */
    137 
    138 /*
    139  * structure to hold master boot block in physical sector 0 of the disk.
    140  * Note that partitions stuff can't be directly included in the structure
    141  * because of lameo '386 compiler alignment design.
    142  * Alignment issues also force us to have 2 16bit entities for a single
    143  * 32bit win_volserno. It is not used anywhere anyway.
    144  */
    145 
    146 struct mboot {	/* master boot block */
    147 	char	bootinst[BOOTSZ];
    148 	uint16_t win_volserno_lo;
    149 	uint16_t win_volserno_hi;
    150 	uint16_t reserved;
    151 	char	parts[FD_NUMPART * sizeof (struct ipart)];
    152 	ushort_t signature;
    153 };
    154 
    155 #if defined(__i386) || defined(__amd64)
    156 
    157 /* Byte offset of the start of the partition table within the sector */
    158 #define	FDISK_PART_TABLE_START	446
    159 
    160 /* Maximum number of valid partitions assumed as 32 */
    161 #define	MAX_EXT_PARTS	32
    162 
    163 #else
    164 
    165 #define	MAX_EXT_PARTS	0
    166 
    167 #endif	/* if defined(__i386) || defined(__amd64) */
    168 
    169 #ifdef	__cplusplus
    170 }
    171 #endif
    172 
    173 #endif	/* _SYS_DKTP_FDISK_H */
    174