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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
*
* 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 <types.h>
#include <console/console.h>
#include <commonlib/helpers.h>
#include <arch/acpi.h>
#include <device/device.h>
#include <device/pci_ops.h>
#include "sandybridge.h"
#include <southbridge/intel/bd82x6x/pch.h>
unsigned long acpi_fill_mcfg(unsigned long current)
{
u32 pciexbar = 0;
u32 pciexbar_reg;
int max_buses;
struct device *const dev = pcidev_on_root(0, 0);
if (!dev)
return current;
pciexbar_reg=pci_read_config32(dev, PCIEXBAR);
// 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;
}
static unsigned long acpi_create_igfx_rmrr(const unsigned long current)
{
const u32 base_mask = ~(u32)(MiB - 1);
struct device *const host = pcidev_on_root(0, 0);
if (!host)
return 0;
const u32 bgsm = pci_read_config32(host, BGSM) & base_mask;
const u32 tolud = pci_read_config32(host, TOLUD) & base_mask;
if (!bgsm || !tolud)
return 0;
return acpi_create_dmar_rmrr(current, 0, bgsm, tolud - 1);
}
static unsigned long acpi_fill_dmar(unsigned long current)
{
const struct device *const igfx = pcidev_on_root(2, 0);
if (igfx && igfx->enabled) {
unsigned long tmp;
tmp = current;
current += acpi_create_dmar_drhd(current, 0, 0, IOMMU_BASE1);
current += acpi_create_dmar_ds_pci(current, 0, 2, 0);
current += acpi_create_dmar_ds_pci(current, 0, 2, 1);
acpi_dmar_drhd_fixup(tmp, current);
tmp = current;
current += acpi_create_igfx_rmrr(current);
if (current != tmp) {
current += acpi_create_dmar_ds_pci(current, 0, 2, 0);
current += acpi_create_dmar_ds_pci(current, 0, 2, 1);
acpi_dmar_rmrr_fixup(tmp, current);
}
}
const unsigned long tmp = current;
current += acpi_create_dmar_drhd(current,
DRHD_INCLUDE_PCI_ALL, 0, IOMMU_BASE2);
current += acpi_create_dmar_ds_ioapic(current,
2, PCH_IOAPIC_PCI_BUS, PCH_IOAPIC_PCI_SLOT, 0);
size_t i;
for (i = 0; i < 8; ++i)
current += acpi_create_dmar_ds_msi_hpet(current,
0, PCH_HPET_PCI_BUS, PCH_HPET_PCI_SLOT, i);
acpi_dmar_drhd_fixup(tmp, current);
return current;
}
unsigned long northbridge_write_acpi_tables(struct device *const dev,
unsigned long current,
struct acpi_rsdp *const rsdp)
{
const u32 capid0_a = pci_read_config32(dev, 0xe4);
if (capid0_a & (1 << 23))
return current;
printk(BIOS_DEBUG, "ACPI: * DMAR\n");
acpi_dmar_t *const dmar = (acpi_dmar_t *)current;
acpi_create_dmar(dmar, DMAR_INTR_REMAP, acpi_fill_dmar);
current += dmar->header.length;
current = acpi_align_current(current);
acpi_add_table(rsdp, dmar);
current = acpi_align_current(current);
printk(BIOS_DEBUG, "current = %lx\n", current);
return current;
}
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