param.h revision 7563:84ec90ffc3f7
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