| /* |
| * 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.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; |
| } |