csrc-r4k.c

来自「linux 内核源代码」· C语言 代码 · 共 34 行

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2007 by Ralf Baechle
 */
#include <linux/clocksource.h>
#include <linux/init.h>

#include <asm/time.h>

static cycle_t c0_hpt_read(void)
{
	return read_c0_count();
}

static struct clocksource clocksource_mips = {
	.name		= "MIPS",
	.read		= c0_hpt_read,
	.mask		= CLOCKSOURCE_MASK(32),
	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
};

void __init init_mips_clocksource(void)
{
	/* Calclate a somewhat reasonable rating value */
	clocksource_mips.rating = 200 + mips_hpt_frequency / 10000000;

	clocksource_set_clock(&clocksource_mips, mips_hpt_frequency);

	clocksource_register(&clocksource_mips);
}