| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2015 secunet Security Networks AG |
| * |
| * 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 <stdint.h> |
| |
| #include <arch/io.h> |
| #include <device/device.h> |
| #include <device/pci_def.h> |
| |
| #include "sandybridge.h" |
| |
| void sandybridge_init_iommu(void) |
| { |
| const u32 capid0_a = pci_read_config32(PCI_DEV(0, 0, 0), 0xe4); |
| if (capid0_a & (1 << 23)) |
| return; |
| |
| /* setup BARs */ |
| MCHBAR32(0x5404) = IOMMU_BASE1 >> 32; |
| MCHBAR32(0x5400) = IOMMU_BASE1 | 1; |
| MCHBAR32(0x5414) = IOMMU_BASE2 >> 32; |
| MCHBAR32(0x5410) = IOMMU_BASE2 | 1; |
| |
| /* lock policies */ |
| write32((void *)(IOMMU_BASE1 + 0xff0), 0x80000000); |
| |
| const struct device *const azalia = pcidev_on_root(0x1b, 0); |
| if (azalia && azalia->enabled) { |
| write32((void *)(IOMMU_BASE2 + 0xff0), 0x20000000); |
| write32((void *)(IOMMU_BASE2 + 0xff0), 0xa0000000); |
| } else { |
| write32((void *)(IOMMU_BASE2 + 0xff0), 0x80000000); |
| } |
| } |