FreeBSD/Linux Kernel Cross Reference
sys/sys/kernel.h
1 /* $NetBSD: kernel.h,v 1.35 2022/10/26 23:27:32 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)kernel.h 8.3 (Berkeley) 1/21/94
37 */
38
39 #ifndef _SYS_KERNEL_H_
40 #define _SYS_KERNEL_H_
41
42 #if defined(_KERNEL) || defined(_STANDALONE)
43 #include <sys/param.h>
44
45 /* Global variables for the kernel. */
46
47 extern long hostid;
48 extern char hostname[MAXHOSTNAMELEN];
49 extern int hostnamelen;
50 extern char domainname[MAXHOSTNAMELEN];
51 extern int domainnamelen;
52
53 extern int rtc_offset; /* offset of rtc from UTC in minutes */
54
55 extern int cold; /* still working on startup */
56 extern int start_init_exec; /* init(8) may have started */
57 extern int shutting_down; /* system is shutting down */
58 extern int tick; /* usec per tick (1000000 / hz) */
59 extern int tickadj; /* "standard" clock skew, us./tick */
60 extern int hz; /* system clock's frequency */
61 extern int stathz; /* statistics clock's frequency */
62 extern int profhz; /* profiling clock's frequency */
63
64 extern int profsrc; /* profiling source */
65 extern int psratio; /* ratio: prof / stat */
66
67 /* Accessors. */
68
69 int getticks(void);
70
71 #define PROFSRC_CLOCK 0
72
73 #endif
74
75 #endif /* _SYS_KERNEL_H_ */
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