system.h

ARM S3C2410 linux2.4 内核源码

/*
 *  linux/include/asm-arm/arch-rpc/system.h
 *
 *  Copyright (C) 1996-1999 Russell King.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <asm/arch/hardware.h>
#include <asm/hardware/iomd.h>
#include <asm/io.h>

static void arch_idle(void)
{
	unsigned long start_idle;

	start_idle = jiffies;

	do {
		if (current->need_resched || hlt_counter)
			goto slow_out;
		cpu_do_idle(IDLE_WAIT_FAST);
	} while (time_before(jiffies, start_idle + HZ/50));

	cpu_do_idle(IDLE_CLOCK_SLOW);

	while (!current->need_resched && !hlt_counter) {
		cpu_do_idle(IDLE_WAIT_SLOW);
	}

	cpu_do_idle(IDLE_CLOCK_FAST);
slow_out:
}

static inline void arch_reset(char mode)
{
	iomd_writeb(0, IOMD_ROMCR0);

	/*
	 * Jump into the ROM
	 */
	cpu_reset(0);
}