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
34extern "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 */
75struct 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
146struct 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