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authorMatt DeVillier <matt.devillier@gmail.com>2018-03-04 01:41:23 -0600
committerPatrick Georgi <pgeorgi@google.com>2018-03-08 17:49:50 +0000
commit85d98d9236c006e6ea328e8cde79b5bc15ee1264 (patch)
treee1003bcf29ceb23545cdf3cb8dacf117f3b9c847 /src/northbridge/intel/haswell
parent62bef5a6bebbb01f00fd3f11488db749b005087e (diff)
downloadcoreboot-85d98d9236c006e6ea328e8cde79b5bc15ee1264.tar.xz
nb/intel/haswell: Generate ACPI DMAR table
If the SoC is VT-d capable, write an ACPI DMAR table. The entry for the GFXVTBAR is only generated if the IGD is enabled. Change-Id: Ib354337d47b27d18c3b79b5de3b4fa100b59c8fc Signed-off-by: Matt DeVillier <matt.devillier@gmail.com> Reviewed-on: https://review.coreboot.org/24984 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Youness Alaoui <snifikino@gmail.com>
Diffstat (limited to 'src/northbridge/intel/haswell')
-rw-r--r--src/northbridge/intel/haswell/acpi.c57
-rw-r--r--src/northbridge/intel/haswell/haswell.h8
-rw-r--r--src/northbridge/intel/haswell/northbridge.c1
3 files changed, 66 insertions, 0 deletions
diff --git a/src/northbridge/intel/haswell/acpi.c b/src/northbridge/intel/haswell/acpi.c
index e032948e52..9d76ba8ce2 100644
--- a/src/northbridge/intel/haswell/acpi.c
+++ b/src/northbridge/intel/haswell/acpi.c
@@ -22,6 +22,7 @@
#include <device/pci.h>
#include <device/pci_ids.h>
#include "haswell.h"
+#include <southbridge/intel/lynxpoint/pch.h>
unsigned long acpi_fill_mcfg(unsigned long current)
{
@@ -69,3 +70,59 @@ unsigned long acpi_fill_mcfg(unsigned long current)
return current;
}
+
+static unsigned long acpi_fill_dmar(unsigned long current)
+{
+ struct device *const igfx_dev = dev_find_slot(0, PCI_DEVFN(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_drhd_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_drhd_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_drhd_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;
+}
diff --git a/src/northbridge/intel/haswell/haswell.h b/src/northbridge/intel/haswell/haswell.h
index b7954e8499..25d88966de 100644
--- a/src/northbridge/intel/haswell/haswell.h
+++ b/src/northbridge/intel/haswell/haswell.h
@@ -212,6 +212,14 @@ void dump_mem(unsigned start, unsigned end);
void report_platform_info(void);
#endif /* !__SMM__ */
+#if ENV_RAMSTAGE && !defined(__SIMPLE_DEVICE__)
+#include <device/device.h>
+
+struct acpi_rsdp;
+unsigned long northbridge_write_acpi_tables(device_t device,
+ unsigned long start, struct acpi_rsdp *rsdp);
+#endif
+
#endif
#endif
#endif /* __NORTHBRIDGE_INTEL_HASWELL_HASWELL_H__ */
diff --git a/src/northbridge/intel/haswell/northbridge.c b/src/northbridge/intel/haswell/northbridge.c
index 32be916a45..f51eb35ee8 100644
--- a/src/northbridge/intel/haswell/northbridge.c
+++ b/src/northbridge/intel/haswell/northbridge.c
@@ -85,6 +85,7 @@ static struct device_operations pci_domain_ops = {
.init = NULL,
.scan_bus = pci_domain_scan_bus,
.ops_pci_bus = pci_bus_default_ops,
+ .write_acpi_tables = northbridge_write_acpi_tables,
};
static int get_bar(device_t dev, unsigned int index, u32 *base, u32 *len)