nb/intel/sandybridge: Add ACPI DMAR table

Add a DMAR table to advertise IOMMU and IRQ remapping capabilities to
the OS.

Tested with kontron/ktqm77. Under Linux, the table is detected and
interrupt remapping is enabled automatically.

Change-Id: Id6ee601a0a8543ed09c6bb8d308a3a3549fc34e5
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/12195
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@google.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
3 files changed