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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2009 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.
*/
#include <stdint.h>
#include <arch/io.h>
#include <device/pci_ids.h>
#include "i82371eb.h"
static void bootblock_southbridge_init(void)
{
u16 reg16;
pci_devfn_t dev;
/*
* Note: The Intel 82371AB/EB/MB ISA device can be on different
* PCI bus:device.function locations on different boards.
* Examples we encountered: 00:07.0, 00:04.0, or 00:14.0.
* But scanning for the PCI IDs (instead of hardcoding
* bus/device/function numbers) works on all boards.
*/
dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_82371AB_ISA), 0);
/* Enable access to the whole ROM, disable ROM write access. */
reg16 = pci_read_config16(dev, XBCS);
reg16 |= LOWER_BIOS_ENABLE | EXT_BIOS_ENABLE | EXT_BIOS_ENABLE_1MB;
reg16 &= ~(WRITE_PROTECT_ENABLE); /* Disable ROM write access. */
pci_write_config16(dev, XBCS, reg16);
}
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