85 lines
3.7 KiB
C
85 lines
3.7 KiB
C
/* $NetBSD: kernel.h,v 1.16 2000/03/23 06:31:51 thorpej Exp $ */
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kernel.h 8.3 (Berkeley) 1/21/94
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*/
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#ifndef _SYS_KERNEL_H_
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#define _SYS_KERNEL_H_
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/* Global variables for the kernel. */
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extern long hostid;
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extern char hostname[MAXHOSTNAMELEN];
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extern int hostnamelen;
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extern char domainname[MAXHOSTNAMELEN];
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extern int domainnamelen;
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extern volatile struct timeval mono_time;
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extern struct timeval boottime;
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extern struct timeval runtime;
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extern volatile struct timeval time;
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extern int rtc_offset; /* offset of rtc from UTC in minutes */
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extern int cold; /* still working on startup */
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extern int tick; /* usec per tick (1000000 / hz) */
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extern int tickfix; /* periodic tick adj. tick not integral */
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extern int tickfixinterval; /* interval at which to apply adjustment */
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extern int tickadj; /* "standard" clock skew, us./tick */
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extern int hz; /* system clock's frequency */
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extern int stathz; /* statistics clock's frequency */
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extern int profhz; /* profiling clock's frequency */
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extern int lbolt; /* once a second sleep address */
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/*
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* These globals indicate the number of times hardlock() has ticked,
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* and the successive attempt of softclock() to catch up with it. These
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* are large unsigned numbers so that arithmetic can be performed on them
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* with no reasonable worry about an overflow occurring (we get over 500
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* million years with this).
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*
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* IMPORTANT NOTE: you *must* be at splclock() in order to read both
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* hardclock_ticks and softclock_ticks. This is because the 64-bit
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* quantities may not be readable in an atomic fashion on all CPU types.
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*/
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extern u_int64_t hardclock_ticks, softclock_ticks;
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#endif /* _SYS_KERNEL_H_ */
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