71a3d96bc4
* detect more i945 variants * raminit fixes * ACPI + PCIe updates Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Peter Stuge <peter@stuge.se> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4455 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
|
|
* This file is part of the coreboot project.
|
|
*
|
|
* Copyright (C) 2007-2009 coresystems GmbH
|
|
*
|
|
* 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/acpi.h>
|
|
#include <arch/acpigen.h>
|
|
#include <device/device.h>
|
|
#include <device/pci.h>
|
|
#include <device/pci_ids.h>
|
|
|
|
unsigned long acpi_fill_mcfg(unsigned long current)
|
|
{
|
|
device_t dev;
|
|
u32 pciexbar = 0;
|
|
u32 pciexbar_reg;
|
|
int max_buses;
|
|
|
|
dev = dev_find_device(0x8086, 0x27a0, 0);
|
|
if (!dev)
|
|
return current;
|
|
|
|
pciexbar_reg=pci_read_config32(dev, 0x48);
|
|
|
|
// MMCFG not supported or not enabled.
|
|
if (!(pciexbar_reg & (1 << 0)))
|
|
return current;
|
|
|
|
switch ((pciexbar_reg >> 1) & 3) {
|
|
case 0: // 256MB
|
|
pciexbar = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28));
|
|
max_buses = 256;
|
|
break;
|
|
case 1: // 128M
|
|
pciexbar = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27));
|
|
max_buses = 128;
|
|
break;
|
|
case 2: // 64M
|
|
pciexbar = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)|(1 << 26));
|
|
max_buses = 64;
|
|
break;
|
|
default: // RSVD
|
|
return current;
|
|
}
|
|
|
|
if (!pciexbar)
|
|
return current;
|
|
|
|
current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current,
|
|
pciexbar, 0x0, 0x0, max_buses - 1);
|
|
|
|
return current;
|
|
}
|
|
|
|
|