FreeBSD/Linux Kernel Cross Reference
sys/sys/kernel.h
1 /* $OpenBSD: kernel.h,v 1.25 2021/01/13 16:28:50 cheloha Exp $ */
2 /* $NetBSD: kernel.h,v 1.11 1995/03/03 01:24:16 cgd Exp $ */
3
4 /*-
5 * Copyright (c) 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)kernel.h 8.3 (Berkeley) 1/21/94
38 */
39
40 /* Global variables for the kernel. */
41
42 /* 1.1 */
43 extern long hostid;
44 extern char hostname[MAXHOSTNAMELEN];
45 extern int hostnamelen;
46 extern char domainname[MAXHOSTNAMELEN];
47 extern int domainnamelen;
48
49 /* 1.2 */
50 extern int utc_offset; /* seconds east of UTC */
51
52 extern int tick; /* usec per tick (1000000 / hz) */
53 extern int tick_nsec; /* nsec per tick */
54 extern int ticks; /* # of hardclock ticks */
55 extern int hz; /* system clock's frequency */
56 extern int stathz; /* statistics clock's frequency */
57 extern int profhz; /* profiling clock's frequency */
58 extern int lbolt; /* once a second sleep address */
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