xref: /illumos-gate/usr/src/uts/common/sys/dktp/fdisk.h (revision df5e8b1f4e09afbb91977571af3bf6685ad870e4)
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  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 /*	Copyright (c) 1984, 1986, 1987, 1988 AT&T	*/
26 /*	  All Rights Reserved  	*/
27 
28 
29 #ifndef _SYS_DKTP_FDISK_H
30 #define	_SYS_DKTP_FDISK_H
31 
32 #pragma ident	"%Z%%M%	%I%	%E% SMI"
33 
34 #ifdef	__cplusplus
35 extern "C" {
36 #endif
37 
38 /*
39  * fdisk.h
40  * This file defines the structure of physical disk sector 0 for use on
41  * AT386 systems.  The format of this sector is constrained by the ROM
42  * BIOS and MS-DOS conventions.
43  * Note that this block does not define the partitions used by the unix
44  * driver.  The unix partitions are obtained from the VTOC.
45  */
46 
47 /*
48  * BOOTSZ was reduced from 446 to 440 bytes to NOT overwrite the Windows
49  * Vista DISKID. Otherwise Vista won't boot from Solaris GRUB in a dual-boot
50  * setup.
51  * The actual size of mboot code is 425 bytes while that of GRUB stage1 is
52  * 423 bytes. So this changes does not harm them.
53  */
54 #define	BOOTSZ		440	/* size of boot code in master boot block */
55 #define	FD_NUMPART	4	/* number of 'partitions' in fdisk table */
56 #define	MBB_MAGIC	0xAA55	/* magic number for mboot.signature */
57 #define	DEFAULT_INTLV	4	/* default interleave for testing tracks */
58 #define	MINPSIZE	4	/* minimum number of cylinders in a partition */
59 #define	TSTPAT		0xE5	/* test pattern for verifying disk */
60 
61 /*
62  * structure to hold the fdisk partition table
63  */
64 struct ipart {
65 	unsigned char bootid;	/* bootable or not */
66 	unsigned char beghead;	/* beginning head, sector, cylinder */
67 	unsigned char begsect;	/* begcyl is a 10-bit number. High 2 bits */
68 	unsigned char begcyl;	/*	are in begsect. */
69 	unsigned char systid;	/* OS type */
70 	unsigned char endhead;	/* ending head, sector, cylinder */
71 	unsigned char endsect;	/* endcyl is a 10-bit number.  High 2 bits */
72 	unsigned char endcyl;	/*	are in endsect. */
73 	int	relsect;	/* first sector relative to start of disk */
74 	int	numsect;	/* number of sectors in partition */
75 };
76 /*
77  * Values for bootid.
78  */
79 #define	NOTACTIVE	0
80 #define	ACTIVE		128
81 /*
82  * Values for systid.
83  */
84 #define	DOSOS12		1	/* DOS partition, 12-bit FAT */
85 #define	PCIXOS		2	/* PC/IX partition */
86 #define	DOSOS16		4	/* DOS partition, 16-bit FAT */
87 #define	EXTDOS		5	/* EXT-DOS partition */
88 #define	DOSHUGE		6	/* Huge DOS partition  > 32MB */
89 #define	FDISK_IFS	7	/* Installable File System (IFS): HPFS & NTFS */
90 #define	FDISK_AIXBOOT	8	/* AIX Boot */
91 #define	FDISK_AIXDATA	9	/* AIX Data */
92 #define	FDISK_OS2BOOT	10	/* OS/2 Boot Manager */
93 #define	FDISK_WINDOWS	11	/* Windows 95 FAT32 (up to 2047GB) */
94 #define	FDISK_EXT_WIN	12	/* Windows 95 FAT32 (extended-INT13) */
95 #define	FDISK_FAT95	14	/* DOS 16-bit FAT, LBA-mapped */
96 #define	FDISK_EXTLBA	15	/* Extended partition, LBA-mapped */
97 #define	DIAGPART	18	/* Diagnostic boot partition (OS independent) */
98 #define	FDISK_LINUX	65	/* Linux */
99 #define	FDISK_LINUXDSWAP	66	/* Linux swap (sharing disk w/ DRDOS) */
100 #define	FDISK_LINUXDNAT	67	/* Linux native (sharing disk with DRDOS) */
101 #define	FDISK_CPM	82	/* CP/M */
102 #define	DOSDATA		86	/* DOS data partition */
103 #define	OTHEROS		98	/* part. type for appl. (DB?) needs */
104 				/* raw partition.  ID was 0 but conflicted */
105 				/* with DOS 3.3 fdisk    */
106 #define	UNIXOS		99	/* UNIX V.x partition */
107 #define	UNUSED		100	/* unassigned partition */
108 #define	FDISK_NOVELL3	101	/* Novell Netware 3.x and later */
109 #define	FDISK_QNX4	119	/* QNX 4.x */
110 #define	FDISK_QNX42	120	/* QNX 4.x 2nd part */
111 #define	FDISK_QNX43	121	/* QNX 4.x 3rd part */
112 #define	SUNIXOS		130	/* Solaris UNIX partition */
113 #define	FDISK_LINUXNAT	131	/* Linux native */
114 #define	FDISK_NTFSVOL1	134	/* NTFS volume set 1 */
115 #define	FDISK_NTFSVOL2	135	/* NTFS volume set 2 */
116 #define	FDISK_BSD	165	/* BSD/386, 386BSD, NetBSD, FreeBSD, OpenBSD */
117 #define	FDISK_NEXTSTEP	167	/* NeXTSTEP */
118 #define	FDISK_BSDIFS	183	/* BSDI file system */
119 #define	FDISK_BSDISWAP	184	/* BSDI swap */
120 #define	X86BOOT		190	/* x86 Solaris boot partition */
121 #define	SUNIXOS2	191	/* Solaris UNIX partition */
122 #define	EFI_PMBR	238	/* EFI PMBR */
123 #define	EFI_FS		239	/* EFI File System (System Partition) */
124 #define	MAXDOS		65535L	/* max size (sectors) for DOS partition */
125 
126 /*
127  * structure to hold master boot block in physical sector 0 of the disk.
128  * Note that partitions stuff can't be directly included in the structure
129  * because of lameo '386 compiler alignment design.
130  */
131 
132 struct mboot {	/* master boot block */
133 	char     bootinst[BOOTSZ];
134 	uint32_t win_volserno;
135 	uint16_t reserved;
136 	char     parts[FD_NUMPART * sizeof (struct ipart)];
137 	ushort_t signature;
138 };
139 
140 #ifdef	__cplusplus
141 }
142 #endif
143 
144 #endif	/* _SYS_DKTP_FDISK_H */
145