system.h

讲述linux的初始化过程

/*
 * linux/include/asm-arm/arch-sa1100/system.h
 *
 * Copyright (c) 1999 Nicolas Pitre <[e-mail]>
 */
#include <linux/config.h>

static inline void arch_idle(void)
{
	while (!current->need_resched && !hlt_counter)
		cpu_do_idle(0);
}

#ifdef CONFIG_SA1100_VICTOR

/* power off unconditionally */
#define arch_reset(x) machine_power_off()

#else

extern inline void arch_reset(char mode)
{
	if (mode == 's') {
		/* Jump into ROM at address 0 */
		cpu_reset(0);
	} else {
		/* Activate SA1100 watchdog and wait for the trigger... */
		OSMR3 = OSCR + 3686400/2;	/* in 1/2 sec */
		OWER |= OWER_WME;
		OIER |= OIER_E3;
	}
}

#define arch_power_off()	do { } while (0)

#endif