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#ifdef	__cplusplus
31extern "C" {
32#endif
33
34#ifndef UINT16_MAX
35#define	UINT16_MAX	0xffffU
36#endif
37
38#ifndef UINT32_MAX
39#define	UINT32_MAX	0xffffffffU
40#endif
41
42#ifndef INT32_MAX
43#define	INT32_MAX	0x7fffffff
44#endif
45
46/*
47 * This file contains declarations of miscellaneous parameters.
48 */
49#ifndef	SECSIZE
50#define	SECSIZE		DEV_BSIZE
51#endif
52
53#define	MAX_CYLS	(0x10000 - 1)		/* max legal cylinder count */
54#define	MAX_HEADS	(0x10000 - 1)		/* max legal head count */
55#define	MAX_SECTS	(0x10000 - 1)		/* max legal sector count */
56
57#define	MIN_RPM		2000			/* min legal rpm */
58#define	AVG_RPM		3600			/* default rpm */
59#define	MAX_RPM		76000			/* max legal rpm */
60
61#define	MIN_BPS		512			/* min legal bytes/sector */
62#define	AVG_BPS		600			/* default bytes/sector */
63#define	MAX_BPS		1000			/* max legal bytes/sector */
64
65#define	INFINITY	0xffffffffU		/* a big number */
66
67#define	MAXBLKS(heads, spt)	UINT16_MAX * heads * spt, heads, spt
68#ifdef	__cplusplus
69}
70#endif
71
72#endif	/* _PARAM_H */
73