| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <types.h> |
| #include <console/console.h> |
| #include <commonlib/helpers.h> |
| #include <acpi/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 & (0xffffffffULL << 28); |
| max_buses = 256; |
| break; |
| case 1: /* 128M */ |
| pciexbar = pciexbar_reg & (0xffffffffULL << 27); |
| max_buses = 128; |
| break; |
| case 2: /* 64M */ |
| pciexbar = pciexbar_reg & (0xffffffffULL << 26); |
| max_buses = 64; |
| break; |
| default: /* RSVD */ |
| return current; |
| } |
| |
| if (!pciexbar) |
| return current; |
| |
| current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current, pciexbar, 0, 0, |
| 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, GFXVT_BASE); |
| 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, VTVC0_BASE); |
| |
| 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(const struct device *const dev, |
| unsigned long current, |
| struct acpi_rsdp *const rsdp) |
| { |
| const u32 capid0_a = pci_read_config32(dev, CAPID0_A); |
| 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; |
| } |