/* SPDX-License-Identifier: GPL-2.0-only */ #include <types.h> #include <console/console.h> #include <commonlib/helpers.h> #include <acpi/acpi.h> #include <arch/ioapic.h> #include <device/device.h> #include <device/pci_ops.h> #include "sandybridge.h" #include <southbridge/intel/bd82x6x/pch.h> 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); /* First, add DRHD entries */ if (igfx && igfx->enabled) { const unsigned long tmp = current; current += acpi_create_dmar_drhd_4k(current, 0, 0, GFXVT_BASE); current += acpi_create_dmar_ds_pci(current, 0, 2, 0); acpi_dmar_drhd_fixup(tmp, current); } { const unsigned long tmp = current; current += acpi_create_dmar_drhd_4k(current, DRHD_INCLUDE_PCI_ALL, 0, VTVC0_BASE); current += acpi_create_dmar_ds_ioapic_from_hw(current, IO_APIC_ADDR, 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); } /* Then, add RMRR entries after all DRHD entries */ if (igfx && igfx->enabled) { const unsigned long tmp = current; current += acpi_create_igfx_rmrr(current); if (current != tmp) { current += acpi_create_dmar_ds_pci(current, 0, 2, 0); acpi_dmar_rmrr_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; }