It would not be possible to set MTRR for range 1MiB to 4MiB. Our RAMTOP is power of 2 and enabling cache for bottom 1MiB should cause no problems. Change-Id: I3619bc25be60f42b68615bfcdf36f02d66796e02 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/15238 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>