| /* 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 <device/device.h> |
| #include <device/pci_ops.h> |
| #include "haswell.h" |
| #include <southbridge/intel/lynxpoint/pch.h> |
| |
| unsigned long acpi_fill_mcfg(unsigned long current) |
| { |
| struct device *dev; |
| u32 pciexbar = 0; |
| u32 pciexbar_reg; |
| int max_buses; |
| u32 mask; |
| |
| 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; |
| |
| mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28); |
| switch ((pciexbar_reg >> 1) & 3) { |
| case 0: /* 256MB */ |
| pciexbar = pciexbar_reg & mask; |
| max_buses = 256; |
| break; |
| case 1: /* 128M */ |
| mask |= (1 << 27); |
| pciexbar = pciexbar_reg & mask; |
| max_buses = 128; |
| break; |
| case 2: /* 64M */ |
| mask |= (1 << 27) | (1 << 26); |
| pciexbar = pciexbar_reg & mask; |
| 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_fill_dmar(unsigned long current) |
| { |
| struct device *const igfx_dev = pcidev_on_root(2, 0); |
| const u32 gfxvtbar = MCHBAR32(GFXVTBAR) & ~0xfff; |
| const u32 vtvc0bar = MCHBAR32(VTVC0BAR) & ~0xfff; |
| const bool gfxvten = MCHBAR32(GFXVTBAR) & 0x1; |
| const bool vtvc0en = MCHBAR32(VTVC0BAR) & 0x1; |
| |
| /* iGFX has to be enabled; GFXVTBAR set, enabled, in 32-bit space */ |
| if (igfx_dev && igfx_dev->enabled && gfxvtbar && gfxvten && !MCHBAR32(GFXVTBAR + 4)) { |
| |
| const unsigned long tmp = current; |
| |
| current += acpi_create_dmar_drhd(current, 0, 0, gfxvtbar); |
| current += acpi_create_dmar_ds_pci(current, 0, 2, 0); |
| |
| acpi_dmar_drhd_fixup(tmp, current); |
| } |
| |
| /* VTVC0BAR has to be set, enabled, and in 32-bit space */ |
| if (vtvc0bar && vtvc0en && !MCHBAR32(VTVC0BAR + 4)) { |
| |
| const unsigned long tmp = current; |
| current += acpi_create_dmar_drhd(current, DRHD_INCLUDE_PCI_ALL, 0, vtvc0bar); |
| 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) |
| { |
| /* Create DMAR table only if we have VT-d capability. */ |
| const u32 capid0_a = pci_read_config32(dev, CAPID0_A); |
| if (capid0_a & VTD_DISABLE) |
| return current; |
| |
| acpi_dmar_t *const dmar = (acpi_dmar_t *)current; |
| printk(BIOS_DEBUG, "ACPI: * DMAR\n"); |
| acpi_create_dmar(dmar, DMAR_INTR_REMAP, acpi_fill_dmar); |
| current += dmar->header.length; |
| current = acpi_align_current(current); |
| acpi_add_table(rsdp, dmar); |
| |
| return current; |
| } |