soc/intel/broadwell: add support for Intel GMA OpRegion

Add global/ACPI nvs variables required for IGD OpRegion.
Add functions necessary to generate ACPI OpRegion, save the
table address in ASLB, and restore table address upon S3 resume.

Implementation largely based on existing Haswell/Lynxpoint code.

Test: boot Windows 10 on google/lulu with Tianocore payload and
GOP display init, observe display driver loaded and functional,
display not black screen when resuming from S3 suspend.

Change-Id: I024f4f0784df3cbbb9977692e9ef0ff9c3552725
Signed-off-by: CoolStar <>
Signed-off-by: Matt DeVillier <>
Tested-by: build bot (Jenkins) <>
Reviewed-by: Patrick Rudolph <>
4 files changed