param.h revision 342440ec94087b8c751c580ab9ed6c693d31d418
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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
* or http://www.opensolaris.org/os/licensing.
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _PARAM_H
#define _PARAM_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef UINT16_MAX
#define UINT16_MAX 0xffffU
#endif
#ifndef UINT32_MAX
#define UINT32_MAX 0xffffffffU
#endif
#ifndef INT32_MAX
#define INT32_MAX 0x7fffffff
#endif
/*
* This file contains declarations of miscellaneous parameters.
*/
#ifndef SECSIZE
#define SECSIZE DEV_BSIZE
#endif
#define MAX_CYLS (0x10000 - 1) /* max legal cylinder count */
#define MAX_HEADS (0x10000 - 1) /* max legal head count */
#define MAX_SECTS (0x10000 - 1) /* max legal sector count */
#define MIN_RPM 2000 /* min legal rpm */
#define AVG_RPM 3600 /* default rpm */
#define MAX_RPM 76000 /* max legal rpm */
#define MIN_BPS 512 /* min legal bytes/sector */
#define AVG_BPS 600 /* default bytes/sector */
#define MAX_BPS 1000 /* max legal bytes/sector */
#define INFINITY 0xffffffffU /* a big number */
#define MAXBLKS(heads, spt) UINT16_MAX * heads * spt, heads, spt
#ifdef __cplusplus
}
#endif
#endif /* _PARAM_H */