diff options
Diffstat (limited to 'src/soc/intel/fsp_broadwell_de/acpi.c')
| -rw-r--r-- | src/soc/intel/fsp_broadwell_de/acpi.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/soc/intel/fsp_broadwell_de/acpi.c b/src/soc/intel/fsp_broadwell_de/acpi.c index 1e088684c0..1647505820 100644 --- a/src/soc/intel/fsp_broadwell_de/acpi.c +++ b/src/soc/intel/fsp_broadwell_de/acpi.c @@ -4,6 +4,7 @@ * Copyright (C) 2007-2009 coresystems GmbH * Copyright (C) 2013 Google Inc. * Copyright (C) 2015-2016 Intel Corp. + * Copyright (C) 2016 Siemens 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 @@ -35,6 +36,7 @@ #include <soc/msr.h> #include <soc/pattrs.h> #include <soc/pci_devs.h> +#include <soc/broadwell_de.h> #include <chip.h> uint16_t get_pmbase(void) @@ -312,6 +314,103 @@ void acpi_fill_in_fadt(acpi_fadt_t *fadt, acpi_facs_t *facs, void *dsdt) header->checksum = acpi_checksum((void *) fadt, sizeof(acpi_fadt_t)); } +static unsigned long acpi_fill_dmar(unsigned long current) +{ + uint32_t vtbar, tmp = current; + struct device *dev = dev_find_slot(0, VTD_DEV_FUNC); + uint16_t bdf, hpet_bdf[8]; + uint8_t i, j; + + if (!dev) + return current; + + vtbar = pci_read_config32(dev, VTBAR_OFFSET) & VTBAR_MASK; + if (!vtbar) + return current; + + current += acpi_create_dmar_drhd(current, + DRHD_INCLUDE_PCI_ALL, 0, vtbar); + /* The IIO I/O APIC is fixed on PCI 00:05.4 on Broadwell-DE */ + current += acpi_create_dmar_drhd_ds_ioapic(current, + 9, 0, 5, 4); + /* Get the PCI BDF for the PCH I/O APIC */ + dev = dev_find_slot(0, LPC_DEV_FUNC); + bdf = pci_read_config16(dev, 0x6c); + current += acpi_create_dmar_drhd_ds_ioapic(current, + 8, (bdf >> 8), PCI_SLOT(bdf), PCI_FUNC(bdf)); + + /* + * Check if there are different PCI paths for the 8 HPET timers + * and add every different PCI path as a separate HPET entry. + * Although the DMAR specification talks about HPET block for this + * entry, it is possible to assign a unique PCI BDF to every single + * timer within a HPET block which will result in different source + * IDs reported by a generated MSI. + * In default configuration every single timer will have the same + * PCI BDF which will result in a single HPET entry in DMAR table. + * I have checked several different systems and all of them had one + * single entry for HPET in DMAR. + */ + memset(hpet_bdf, 0, sizeof(hpet_bdf)); + /* Get all unique HPET paths. */ + for (i = 0; i < ARRAY_SIZE(hpet_bdf); i++) { + bdf = pci_read_config16(dev, 0x70 + (i * 2)); + for (j = 0; j < i; j++) { + if (hpet_bdf[j] == bdf) + break; + } + if (j == i) + hpet_bdf[i] = bdf; + } + /* Create one HPET entry in DMAR for every unique HPET PCI path. */ + for (i = 0; i < ARRAY_SIZE(hpet_bdf); i++) { + if (hpet_bdf[i]) + current += acpi_create_dmar_drhd_ds_msi_hpet(current, + 0, (hpet_bdf[i] >> 8), PCI_SLOT(hpet_bdf[i]), + PCI_FUNC(hpet_bdf[i])); + } + acpi_dmar_drhd_fixup(tmp, current); + + /* Create root port ATSR capability */ + tmp = current; + current += acpi_create_dmar_atsr(current, 0, 0); + /* Add one entry to ATSR for each PCI root port */ + dev = all_devices; + do { + dev = dev_find_class(PCI_CLASS_BRIDGE_PCI << 8, dev); + if (dev && dev->bus->secondary == 0 && + PCI_SLOT(dev->path.pci.devfn) <= 3) + current += acpi_create_dmar_drhd_ds_pci_br(current, + dev->bus->secondary, + PCI_SLOT(dev->path.pci.devfn), + PCI_FUNC(dev->path.pci.devfn)); + } while (dev); + acpi_dmar_atsr_fixup(tmp, current); + + return current; +} + +unsigned long northcluster_write_acpi_tables(struct device *const dev, + unsigned long current, + struct acpi_rsdp *const rsdp) +{ + acpi_dmar_t *const dmar = (acpi_dmar_t *)current; + device_t vtdev = dev_find_slot(0, PCI_DEVFN(5, 0)); + + /* Create DMAR table only if virtualization is enabled */ + if (!(pci_read_config32(vtdev, 0x180) & 0x01)) + return 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); + current = acpi_align_current(current); + + return current; +} + static int calculate_power(int tdp, int p1_ratio, int ratio) { u32 m; |