param.h revision 5786:09923a2f905d 
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 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef	_PARAM_H
28#define	_PARAM_H
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#ifdef	__cplusplus
33extern "C" {
34#endif
35
36#ifndef UINT16_MAX
37#define	UINT16_MAX	0xffffU
38#endif
39
40/*
41 * This file contains declarations of miscellaneous parameters.
42 */
43#ifndef	SECSIZE
44#define	SECSIZE		DEV_BSIZE
45#endif
46
47#define	MAX_CYLS	(0x10000 - 1)		/* max legal cylinder count */
48#define	MAX_HEADS	(0x10000 - 1)		/* max legal head count */
49#define	MAX_SECTS	(0x10000 - 1)		/* max legal sector count */
50
51#define	MIN_RPM		2000			/* min legal rpm */
52#define	AVG_RPM		3600			/* default rpm */
53#define	MAX_RPM		76000			/* max legal rpm */
54
55#define	MIN_BPS		512			/* min legal bytes/sector */
56#define	AVG_BPS		600			/* default bytes/sector */
57#define	MAX_BPS		1000			/* max legal bytes/sector */
58
59#define	INFINITY	0x7fffffff		/* a big number */
60
61#define	MAXBLKS(heads, spt)	UINT16_MAX * heads * spt, heads, spt
62#ifdef	__cplusplus
63}
64#endif
65
66#endif	/* _PARAM_H */
67