lib_avr32/interrupts.c

/*
 * Copyright (C) 2006 Atmel Corporation
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */
#include <common.h>

#include <asm/sysreg.h>

void enable_interrupts(void)
{
	asm volatile("csrf	%0" : : "n"(SYSREG_GM_OFFSET));
}

int disable_interrupts(void)
{
	unsigned long sr;

	sr = sysreg_read(SR);
	asm volatile("ssrf	%0" : : "n"(SYSREG_GM_OFFSET));

#ifdef CONFIG_AT32UC3A0xxx
	/* Two NOPs are required after masking interrupts on the
	 * AT32UC3A0512ES. See errata 41.4.5.5. */
	asm("nop");
	asm("nop");
#endif

	return !SYSREG_BFEXT(GM, sr);
}