src/arch/i386/lib/failover.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#define ASSEMBLY 1
#define __PRE_RAM__

#include <arch/io.h>
#include "arch/romcc_io.h"
#include "pc80/mc146818rtc_early.c"

/**
 * Check whether the normal or the fallback image should be booted
 * (by reading the proper flag from CMOS), and boot it.
 *
 * @param bist The input BIST value.
 * @return The BIST value.
 */
static unsigned long main(unsigned long bist)
{
	if (do_normal_boot())
		goto normal_image;
	else
		goto fallback_image;

normal_image:
	__asm__ __volatile__("jmp __normal_image" : : "a" (bist) : );

cpu_reset:
	__asm__ __volatile__("jmp __cpu_reset" : : "a" (bist) : );

fallback_image:
	return bist;
}