src/cpu/amd/geode_lx/syspreinit.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2006 Indrek Kruusa <indrek.kruusa@artecdesign.ee>
 * Copyright (C) 2006 Ronald G. Minnich <rminnich@gmail.com>
 * Copyright (C) 2007 Advanced Micro Devices, Inc.
 *
 * 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
 */

/* ***************************************************************************/
/* **/
/* *	StartTimer1*/
/* **/
/* *	Entry: none*/
/* *	Exit: Starts Timer 1 for port 61 use*/
/* *	Destroys: Al,*/
/* **/
/* ***************************************************************************/
static void StartTimer1(void)
{
	outb(0x56, 0x43);
	outb(0x12, 0x41);
}

void SystemPreInit(void)
{

	/* they want a jump ... */
#if !CONFIG_CACHE_AS_RAM
	__asm__ __volatile__("jmp .+2\ninvd\njmp .+2\n");
#endif
	StartTimer1();
}