src/southbridge/intel/i82801ix/bootblock.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2011 Sven Schnelle <svens@stackframe.org>
 *
 * 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; version 2 of the License.
 *
 * 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.
 */

#include <arch/io.h>
#include <device/pci_ops.h>

static void enable_spi_prefetch(void)
{
	u8 reg8;
	pci_devfn_t dev;

	dev = PCI_DEV(0, 0x1f, 0);

	reg8 = pci_read_config8(dev, 0xdc);
	reg8 &= ~(3 << 2);
	reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
	pci_write_config8(dev, 0xdc, reg8);
}

static void bootblock_southbridge_init(void)
{
	enable_spi_prefetch();
}