soc/intel/skylake: Cache the MMIO BIOS region

If the boot media is memory mapped temporarily mark it as write
protect MTRR type so that memory-mapped accesses are faster.

Depthcharge payload loading was sped up by 75ms using this.

Change-Id: Ice217561bb01a43ba520ce51e03d81979f317343
Signed-off-by: Barnali Sarkar <barnali.sarkar@intel.com>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/20089
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

0 files changed, 0 insertions, 0 deletions