/*      $NetBSD: clock.c,v 1.17 2006/09/09 03:14:18 tsutsui Exp $	*/

/*
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Lawrence Berkeley Laboratory.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)clock.c     8.1 (Berkeley) 6/11/93
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.17 2006/09/09 03:14:18 tsutsui Exp $");

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <news68k/news68k/clockvar.h>

#include <machine/cpu.h>

static	void (*cpu_initclocks_hook)(int, int);

void
timer_config(void (*initfunc)(int, int))
{

	if (cpu_initclocks_hook)
		panic("clock_config: too many timers configured");

	cpu_initclocks_hook = initfunc;
}

/*
 * Set up the real-time and statistics clocks.  Leave stathz 0 only
 * if no alternative timer is available.
 *
 * The frequencies of these clocks must be an even number of microseconds.
 */
void
cpu_initclocks(void)
{

	if (cpu_initclocks_hook == NULL)
		panic("no timer device configured");

	if (1000000 % hz) {
		printf("cannot get %d Hz clock; using 100 Hz\n", hz);
		hz = 100;
		tick = 1000000 / hz;
	}

	/* Call the machine-specific initclocks hook. */

	(*cpu_initclocks_hook)(0, 0);
}

/*
 * This does not need to do anything, as we have only one timer and
 * profhz == stathz == hz.
 */
void
setstatclockrate(int newhz)
{

	/* nothing to do */
}