pc_label.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_FS_PC_LABEL_H
#define _SYS_FS_PC_LABEL_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/isa_defs.h>
/*
* PC master boot block & partition table defines.
*/
/*
* Offsets into the boot sector where the string 'FAT' is expected.
* First value is where the string is on 12 and 16 bit FATs,
* the second value is where it is on 32 bit FATs.
*/
#define PCFS_TYPESTRING_OFFSET16 0x36
#define PCFS_TYPESTRING_OFFSET32 0x52
#define DOS_ID2b 0x90
/*
* Media descriptor byte.
* Found in the boot block and in the first byte of the FAT.
* Second and third byte in the FAT must be 0xFF.
* Note that all technical sources indicate that this means of
* identification is extremely unreliable.
*/
/*
*/
#if defined(_LITTLE_ENDIAN)
/* e.g. i386 machines */
#else
/* e.g. SPARC machines */
#define getbyte(A, N) (((unsigned char *)(&(A)))[N])
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SYS_FS_PC_LABEL_H */