xref: /illumos-gate/usr/src/cmd/fs.d/pcfs/fsck/pcfs_bpb.h (revision 7c478bd9)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright (c) 1999 by Sun Microsystems, Inc.
24*7c478bd9Sstevel@tonic-gate  * All rights reserved.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate #ifndef _PCFS_BPB_H
28*7c478bd9Sstevel@tonic-gate #define	_PCFS_BPB_H
29*7c478bd9Sstevel@tonic-gate 
30*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
31*7c478bd9Sstevel@tonic-gate 
32*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus
33*7c478bd9Sstevel@tonic-gate extern "C" {
34*7c478bd9Sstevel@tonic-gate #endif
35*7c478bd9Sstevel@tonic-gate 
36*7c478bd9Sstevel@tonic-gate /*
37*7c478bd9Sstevel@tonic-gate  * Common Bios Parameter Block definitions for the pcfs user-level utilities
38*7c478bd9Sstevel@tonic-gate  *
39*7c478bd9Sstevel@tonic-gate  * At press time these definitions are duplicated in mkfs_pcfs.h.  They really
40*7c478bd9Sstevel@tonic-gate  * need to be separated out of mkfs_pcfs.h and then it should reference this
41*7c478bd9Sstevel@tonic-gate  * file.
42*7c478bd9Sstevel@tonic-gate  */
43*7c478bd9Sstevel@tonic-gate #define	BPSEC		512	/* Assumed # of bytes per sector */
44*7c478bd9Sstevel@tonic-gate 
45*7c478bd9Sstevel@tonic-gate #define	OPCODE1		0xE9
46*7c478bd9Sstevel@tonic-gate #define	OPCODE2		0xEB
47*7c478bd9Sstevel@tonic-gate #define	BOOTSECSIG	0xAA55
48*7c478bd9Sstevel@tonic-gate 
49*7c478bd9Sstevel@tonic-gate /*
50*7c478bd9Sstevel@tonic-gate  * Offset (in bytes) from address of boot sector to where we put
51*7c478bd9Sstevel@tonic-gate  * the backup copy of that sector.  (FAT32 only)
52*7c478bd9Sstevel@tonic-gate  */
53*7c478bd9Sstevel@tonic-gate #define	BKUP_BOOTSECT_OFFSET	0xC00
54*7c478bd9Sstevel@tonic-gate 
55*7c478bd9Sstevel@tonic-gate #define	uppercase(c)	((c) >= 'a' && (c) <= 'z' ? (c) - 'a' + 'A' : (c))
56*7c478bd9Sstevel@tonic-gate 
57*7c478bd9Sstevel@tonic-gate #define	FAT12_TYPE_STRING	"FAT12   "
58*7c478bd9Sstevel@tonic-gate #define	FAT16_TYPE_STRING	"FAT16   "
59*7c478bd9Sstevel@tonic-gate #define	FAT32_TYPE_STRING	"FAT32   "
60*7c478bd9Sstevel@tonic-gate 
61*7c478bd9Sstevel@tonic-gate #define	FAT12_ENTSPERSECT	341
62*7c478bd9Sstevel@tonic-gate #define	FAT16_ENTSPERSECT	256
63*7c478bd9Sstevel@tonic-gate #define	FAT32_ENTSPERSECT	128
64*7c478bd9Sstevel@tonic-gate 
65*7c478bd9Sstevel@tonic-gate #ifndef	SUNIXOSBOOT
66*7c478bd9Sstevel@tonic-gate #define	SUNIXOSBOOT	190	/* Solaris UNIX boot partition */
67*7c478bd9Sstevel@tonic-gate #endif
68*7c478bd9Sstevel@tonic-gate 
69*7c478bd9Sstevel@tonic-gate /*
70*7c478bd9Sstevel@tonic-gate  *	MS-DOS Disk layout:
71*7c478bd9Sstevel@tonic-gate  *
72*7c478bd9Sstevel@tonic-gate  *	---------------------
73*7c478bd9Sstevel@tonic-gate  *	|    Boot sector    |
74*7c478bd9Sstevel@tonic-gate  *	|-------------------|
75*7c478bd9Sstevel@tonic-gate  *	|   Reserved area   |
76*7c478bd9Sstevel@tonic-gate  *	|-------------------|
77*7c478bd9Sstevel@tonic-gate  *	|	FAT #1      |
78*7c478bd9Sstevel@tonic-gate  *	|-------------------|
79*7c478bd9Sstevel@tonic-gate  *	|	FAT #2      |
80*7c478bd9Sstevel@tonic-gate  *	|-------------------|
81*7c478bd9Sstevel@tonic-gate  *	|   Root directory  |
82*7c478bd9Sstevel@tonic-gate  *	|-------------------|
83*7c478bd9Sstevel@tonic-gate  *	|                   |
84*7c478bd9Sstevel@tonic-gate  *	|     File area     |
85*7c478bd9Sstevel@tonic-gate  *	|___________________|
86*7c478bd9Sstevel@tonic-gate  */
87*7c478bd9Sstevel@tonic-gate #ifdef i386
88*7c478bd9Sstevel@tonic-gate #pragma	pack(1)
89*7c478bd9Sstevel@tonic-gate #endif
90*7c478bd9Sstevel@tonic-gate struct _orig_bios_param_blk {
91*7c478bd9Sstevel@tonic-gate 	uint16_t bytes_per_sector;
92*7c478bd9Sstevel@tonic-gate 	uchar_t	 sectors_per_cluster;
93*7c478bd9Sstevel@tonic-gate 	uint16_t resv_sectors;
94*7c478bd9Sstevel@tonic-gate 	uchar_t	 num_fats;
95*7c478bd9Sstevel@tonic-gate 	uint16_t num_root_entries;
96*7c478bd9Sstevel@tonic-gate /*
97*7c478bd9Sstevel@tonic-gate  *  The sectors_in_volume field will be zero on larger volumes (>32Mb)
98*7c478bd9Sstevel@tonic-gate  *  and newer file systems (>=MSDOS4.0).  In these cases the
99*7c478bd9Sstevel@tonic-gate  *  sectors_in_logical_volume field should be used instead.
100*7c478bd9Sstevel@tonic-gate  */
101*7c478bd9Sstevel@tonic-gate 	uint16_t sectors_in_volume;
102*7c478bd9Sstevel@tonic-gate 	uchar_t	 media;
103*7c478bd9Sstevel@tonic-gate 	uint16_t sectors_per_fat;
104*7c478bd9Sstevel@tonic-gate 	uint16_t sectors_per_track;
105*7c478bd9Sstevel@tonic-gate 	uint16_t heads;
106*7c478bd9Sstevel@tonic-gate /*
107*7c478bd9Sstevel@tonic-gate  *  Number of sectors in the partition prior to the start of the logical disk
108*7c478bd9Sstevel@tonic-gate  */
109*7c478bd9Sstevel@tonic-gate 	uint32_t hidden_sectors;
110*7c478bd9Sstevel@tonic-gate 	uint32_t sectors_in_logical_volume;
111*7c478bd9Sstevel@tonic-gate };
112*7c478bd9Sstevel@tonic-gate #ifdef i386
113*7c478bd9Sstevel@tonic-gate #pragma pack()
114*7c478bd9Sstevel@tonic-gate #endif
115*7c478bd9Sstevel@tonic-gate 
116*7c478bd9Sstevel@tonic-gate #ifdef i386
117*7c478bd9Sstevel@tonic-gate #pragma	pack(1)
118*7c478bd9Sstevel@tonic-gate #endif
119*7c478bd9Sstevel@tonic-gate struct _bpb32_extensions {
120*7c478bd9Sstevel@tonic-gate 	uint32_t big_sectors_per_fat;
121*7c478bd9Sstevel@tonic-gate 	uint16_t ext_flags;
122*7c478bd9Sstevel@tonic-gate 	uchar_t	 fs_vers_lo;
123*7c478bd9Sstevel@tonic-gate 	uchar_t	 fs_vers_hi;
124*7c478bd9Sstevel@tonic-gate 	uint32_t root_dir_clust;
125*7c478bd9Sstevel@tonic-gate 	uint16_t fsinfosec;
126*7c478bd9Sstevel@tonic-gate 	uint16_t backupboot;
127*7c478bd9Sstevel@tonic-gate 	uint16_t reserved[6];
128*7c478bd9Sstevel@tonic-gate };
129*7c478bd9Sstevel@tonic-gate #ifdef i386
130*7c478bd9Sstevel@tonic-gate #pragma pack()
131*7c478bd9Sstevel@tonic-gate #endif
132*7c478bd9Sstevel@tonic-gate 
133*7c478bd9Sstevel@tonic-gate #ifdef i386
134*7c478bd9Sstevel@tonic-gate #pragma	pack(1)
135*7c478bd9Sstevel@tonic-gate #endif
136*7c478bd9Sstevel@tonic-gate struct _bpb_extensions {
137*7c478bd9Sstevel@tonic-gate 	uchar_t  phys_drive_num;
138*7c478bd9Sstevel@tonic-gate 	uchar_t  reserved;
139*7c478bd9Sstevel@tonic-gate 	uchar_t  ext_signature;
140*7c478bd9Sstevel@tonic-gate 	uint32_t volume_id;
141*7c478bd9Sstevel@tonic-gate 	uchar_t  volume_label[11];
142*7c478bd9Sstevel@tonic-gate 	uchar_t  type[8];
143*7c478bd9Sstevel@tonic-gate };
144*7c478bd9Sstevel@tonic-gate #ifdef i386
145*7c478bd9Sstevel@tonic-gate #pragma pack()
146*7c478bd9Sstevel@tonic-gate #endif
147*7c478bd9Sstevel@tonic-gate 
148*7c478bd9Sstevel@tonic-gate #ifdef i386
149*7c478bd9Sstevel@tonic-gate #pragma	pack(1)
150*7c478bd9Sstevel@tonic-gate #endif
151*7c478bd9Sstevel@tonic-gate struct _sun_bpb_extensions {
152*7c478bd9Sstevel@tonic-gate 	uint16_t  bs_offset_high;
153*7c478bd9Sstevel@tonic-gate 	uint16_t  bs_offset_low;
154*7c478bd9Sstevel@tonic-gate };
155*7c478bd9Sstevel@tonic-gate #ifdef i386
156*7c478bd9Sstevel@tonic-gate #pragma pack()
157*7c478bd9Sstevel@tonic-gate #endif
158*7c478bd9Sstevel@tonic-gate 
159*7c478bd9Sstevel@tonic-gate /*
160*7c478bd9Sstevel@tonic-gate  * bpb_t is a conglomeration of all the fields a bpb can have.  Every
161*7c478bd9Sstevel@tonic-gate  * bpb will have the orig_bios struct, but only FAT32's will have bpb32,
162*7c478bd9Sstevel@tonic-gate  * and only Solaris boot diskettes will have the sunbpb structure.
163*7c478bd9Sstevel@tonic-gate  */
164*7c478bd9Sstevel@tonic-gate typedef struct _bios_param_blk {
165*7c478bd9Sstevel@tonic-gate 	struct _orig_bios_param_blk bpb;
166*7c478bd9Sstevel@tonic-gate 	struct _bpb32_extensions    bpb32;
167*7c478bd9Sstevel@tonic-gate 	struct _bpb_extensions	    ebpb;
168*7c478bd9Sstevel@tonic-gate 	struct _sun_bpb_extensions  sunbpb;
169*7c478bd9Sstevel@tonic-gate } bpb_t;
170*7c478bd9Sstevel@tonic-gate 
171*7c478bd9Sstevel@tonic-gate #ifdef i386
172*7c478bd9Sstevel@tonic-gate #pragma	pack(1)
173*7c478bd9Sstevel@tonic-gate struct _bpb_head {
174*7c478bd9Sstevel@tonic-gate 	uchar_t			    bs_jump_code[3];
175*7c478bd9Sstevel@tonic-gate 	uchar_t			    bs_oem_name[8];
176*7c478bd9Sstevel@tonic-gate 	struct _orig_bios_param_blk bs_bpb;
177*7c478bd9Sstevel@tonic-gate };
178*7c478bd9Sstevel@tonic-gate #pragma pack()
179*7c478bd9Sstevel@tonic-gate 
180*7c478bd9Sstevel@tonic-gate #pragma	pack(1)
181*7c478bd9Sstevel@tonic-gate struct _boot_sector {
182*7c478bd9Sstevel@tonic-gate 	struct _bpb_head	    bs_front;
183*7c478bd9Sstevel@tonic-gate 	struct _bpb_extensions	    bs_ebpb;
184*7c478bd9Sstevel@tonic-gate 	struct _sun_bpb_extensions  bs_sebpb;
185*7c478bd9Sstevel@tonic-gate 	uchar_t			    bs_bootstrap[444];
186*7c478bd9Sstevel@tonic-gate 	uchar_t			    bs_signature[2];
187*7c478bd9Sstevel@tonic-gate };
188*7c478bd9Sstevel@tonic-gate #pragma pack()
189*7c478bd9Sstevel@tonic-gate 
190*7c478bd9Sstevel@tonic-gate #pragma	pack(1)
191*7c478bd9Sstevel@tonic-gate struct _boot_sector32 {
192*7c478bd9Sstevel@tonic-gate 	struct _bpb_head	    bs_front;
193*7c478bd9Sstevel@tonic-gate 	struct _bpb32_extensions    bs_bpb32;
194*7c478bd9Sstevel@tonic-gate 	struct _bpb_extensions	    bs_ebpb;
195*7c478bd9Sstevel@tonic-gate 	uchar_t			    bs_bootstrap[420];
196*7c478bd9Sstevel@tonic-gate 	uchar_t			    bs_signature[2];
197*7c478bd9Sstevel@tonic-gate };
198*7c478bd9Sstevel@tonic-gate #pragma pack()
199*7c478bd9Sstevel@tonic-gate #else
200*7c478bd9Sstevel@tonic-gate #define	ORIG_BPB_START_INDEX	8	/* index into filler field */
201*7c478bd9Sstevel@tonic-gate #define	EXT_BPB_START_INDEX	33	/* index into filler field */
202*7c478bd9Sstevel@tonic-gate #define	BPB_32_START_INDEX	33	/* index into filler field */
203*7c478bd9Sstevel@tonic-gate #define	EXT_BPB_32_START_INDEX	61	/* index into filler field */
204*7c478bd9Sstevel@tonic-gate struct _boot_sector {
205*7c478bd9Sstevel@tonic-gate 	uchar_t	 bs_jump_code[3];
206*7c478bd9Sstevel@tonic-gate 	uchar_t  bs_filler[59];
207*7c478bd9Sstevel@tonic-gate 	uchar_t  bs_sun_bpb[4];
208*7c478bd9Sstevel@tonic-gate 	uchar_t	 bs_bootstrap[444];
209*7c478bd9Sstevel@tonic-gate 	uchar_t  bs_signature[2];
210*7c478bd9Sstevel@tonic-gate };
211*7c478bd9Sstevel@tonic-gate 
212*7c478bd9Sstevel@tonic-gate struct _boot_sector32 {
213*7c478bd9Sstevel@tonic-gate 	uchar_t	 bs_jump_code[3];
214*7c478bd9Sstevel@tonic-gate 	uchar_t  bs_filler[87];
215*7c478bd9Sstevel@tonic-gate 	uchar_t	 bs_bootstrap[420];
216*7c478bd9Sstevel@tonic-gate 	uchar_t  bs_signature[2];
217*7c478bd9Sstevel@tonic-gate };
218*7c478bd9Sstevel@tonic-gate #endif
219*7c478bd9Sstevel@tonic-gate 
220*7c478bd9Sstevel@tonic-gate typedef union _ubso {
221*7c478bd9Sstevel@tonic-gate 	struct _boot_sector	bs;
222*7c478bd9Sstevel@tonic-gate 	struct _boot_sector32	bs32;
223*7c478bd9Sstevel@tonic-gate 	struct mboot		mb;
224*7c478bd9Sstevel@tonic-gate 	uchar_t			buf[BPSEC];
225*7c478bd9Sstevel@tonic-gate } boot_sector_t;
226*7c478bd9Sstevel@tonic-gate 
227*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus
228*7c478bd9Sstevel@tonic-gate }
229*7c478bd9Sstevel@tonic-gate #endif
230*7c478bd9Sstevel@tonic-gate 
231*7c478bd9Sstevel@tonic-gate #endif /* _PCFS_BPB_H */
232