1. 根目录:
2. arch
3. sh
4. kernel
5. irq_32.c

/*
 * SHcompact irqflags support
 *
 * Copyright (C) 2006 - 2009 Paul Mundt
 *
 * 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.
 */
#include <linux/irqflags.h>
#include <linux/module.h>

void notrace arch_local_irq_restore(unsigned long flags)
{
	unsigned long __dummy0, __dummy1;

	if (flags == ARCH_IRQ_DISABLED) {
		__asm__ __volatile__ (
			"stc	sr, %0\n\t"
			"or	#0xf0, %0\n\t"
			"ldc	%0, sr\n\t"
			: "=&z" (__dummy0)
			: /* no inputs */
			: "memory"
		);
	} else {
		__asm__ __volatile__ (
			"stc	sr, %0\n\t"
			"and	%1, %0\n\t"
#ifdef CONFIG_CPU_HAS_SR_RB
			"stc	r6_bank, %1\n\t"
			"or	%1, %0\n\t"
#endif
			"ldc	%0, sr\n\t"
			: "=&r" (__dummy0), "=r" (__dummy1)
			: "1" (~ARCH_IRQ_DISABLED)
			: "memory"
		);
	}
}
EXPORT_SYMBOL(arch_local_irq_restore);

unsigned long notrace arch_local_save_flags(void)
{
	unsigned long flags;

	__asm__ __volatile__ (
		"stc	sr, %0\n\t"
		"and	#0xf0, %0\n\t"
		: "=&z" (flags)
		: /* no inputs */
		: "memory"
	);

	return flags;
}
EXPORT_SYMBOL(arch_local_save_flags);