| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <types.h> |
| #include <console/console.h> |
| #include <arch/acpi.h> |
| #include <arch/acpigen.h> |
| #include <device/device.h> |
| #include <device/pci_def.h> |
| #include <device/pci_ops.h> |
| |
| #include "gm45.h" |
| |
| unsigned long acpi_fill_mcfg(unsigned long current) |
| { |
| struct device *dev; |
| u32 pciexbar = 0; |
| u32 pciexbar_reg; |
| int max_buses; |
| |
| dev = dev_find_device(0x8086, 0x2a40, 0); |
| if (!dev) |
| return current; |
| |
| pciexbar_reg = pci_read_config32(dev, D0F0_PCIEXBAR_LO); |
| |
| // 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_fill_dmar(unsigned long current) |
| { |
| const struct device *dev; |
| |
| dev = pcidev_on_root(3, 0); |
| int me_active = dev && dev->enabled; |
| |
| dev = pcidev_on_root(2, 0); |
| int igd_active = dev && dev->enabled; |
| |
| int stepping = pci_read_config8(pcidev_on_root(0, 0), |
| PCI_CLASS_REVISION); |
| |
| unsigned long tmp = current; |
| current += acpi_create_dmar_drhd(current, 0, 0, IOMMU_BASE1); |
| current += acpi_create_dmar_ds_pci(current, 0, 0x1b, 0); |
| acpi_dmar_drhd_fixup(tmp, current); |
| |
| if (stepping != STEPPING_B2 && igd_active) { |
| tmp = current; |
| current += acpi_create_dmar_drhd(current, 0, 0, IOMMU_BASE2); |
| current += acpi_create_dmar_ds_pci(current, 0, 0x2, 0); |
| current += acpi_create_dmar_ds_pci(current, 0, 0x2, 1); |
| acpi_dmar_drhd_fixup(tmp, current); |
| } |
| |
| if (me_active) { |
| tmp = current; |
| current += acpi_create_dmar_drhd(current, 0, 0, IOMMU_BASE3); |
| current += acpi_create_dmar_ds_pci(current, 0, 0x3, 0); |
| current += acpi_create_dmar_ds_pci(current, 0, 0x3, 1); |
| current += acpi_create_dmar_ds_pci(current, 0, 0x3, 2); |
| current += acpi_create_dmar_ds_pci(current, 0, 0x3, 3); |
| acpi_dmar_drhd_fixup(tmp, current); |
| } |
| |
| current += acpi_create_dmar_drhd(current, DRHD_INCLUDE_PCI_ALL, 0, IOMMU_BASE4); |
| |
| /* TODO: reserve GTT for 0.2.0 and 0.2.1? */ |
| return current; |
| } |
| |
| unsigned long northbridge_write_acpi_tables(struct device *device, |
| unsigned long start, |
| struct acpi_rsdp *rsdp) |
| { |
| unsigned long current; |
| acpi_dmar_t *dmar; |
| |
| current = start; |
| |
| printk(BIOS_DEBUG, "ACPI: * DMAR\n"); |
| dmar = (acpi_dmar_t *) current; |
| acpi_create_dmar(dmar, 0, 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; |
| } |