101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/* $NetBSD: clock.c,v 1.17 2006/09/09 03:14:18 tsutsui Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* 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, Lawrence Berkeley Laboratory.
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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. 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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* @(#)clock.c 8.1 (Berkeley) 6/11/93
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.17 2006/09/09 03:14:18 tsutsui Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <news68k/news68k/clockvar.h>
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#include <machine/cpu.h>
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static void (*cpu_initclocks_hook)(int, int);
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void
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timer_config(void (*initfunc)(int, int))
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{
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if (cpu_initclocks_hook)
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panic("clock_config: too many timers configured");
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cpu_initclocks_hook = initfunc;
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}
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/*
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* Set up the real-time and statistics clocks. Leave stathz 0 only
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* if no alternative timer is available.
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*
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* The frequencies of these clocks must be an even number of microseconds.
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*/
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void
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cpu_initclocks(void)
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{
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if (cpu_initclocks_hook == NULL)
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panic("no timer device configured");
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if (1000000 % hz) {
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printf("cannot get %d Hz clock; using 100 Hz\n", hz);
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hz = 100;
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tick = 1000000 / hz;
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}
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/* Call the machine-specific initclocks hook. */
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(*cpu_initclocks_hook)(0, 0);
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}
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/*
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* This does not need to do anything, as we have only one timer and
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* profhz == stathz == hz.
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*/
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void
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setstatclockrate(int newhz)
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{
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/* nothing to do */
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}
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