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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2009 coresystems GmbH
* Copyright (C) 2012 The Chromium OS Authors
* Copyright (C) 2013 Sage Electronic Engineering, LLC
*
* 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.
*
* 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
*/
#include <types.h>
#include <string.h>
#include <console/console.h>
#include <arch/io.h>
#include <arch/acpi.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <build.h>
#include "northbridge.h"
unsigned long acpi_fill_mcfg(unsigned long current)
{
device_t dev;
u32 pciexbar = 0;
u32 pciexbar_reg;
int max_buses;
int pci_dev_id;
for (pci_dev_id = PCI_DEVICE_ID_RG_MIN; pci_dev_id <= PCI_DEVICE_ID_RG_MAX; pci_dev_id++) {
dev = dev_find_device(PCI_VENDOR_ID_INTEL, pci_dev_id, 0);
if (dev)
break;
}
if (!dev)
return current;
pciexbar_reg = sideband_read(B_UNIT, BECREG);
/* MMCFG not supported or not enabled. */
if (!(pciexbar_reg & (1 << 0)))
return current;
/* 256MB ECAM range */
pciexbar = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28));
max_buses = 256;
current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current,
pciexbar, 0x0, 0x0, max_buses - 1);
return current;
}
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