tree 10add2e0987826f6fd30f4c43eb07a2f5b1b139a
parent 2b6bb79fe46b020ad4568da90c8c4d819ea2885b
author Angel Pons <th3fanbus@gmail.com> 1588431099 +0200
committer Patrick Rudolph <siro@das-labor.org> 1589265959 +0000

nb/intel/sandybridge: Reorder IOSAV writes

We only write to the IOSAV LFSR registers twice, but we do so between
the writes to the other four IOSAV per-subsequence registers. Since we
know that the IOSAV is sleeping when we program the subsequences, we
might as well do the two oddball LFSR register writes after we have
programmed the always-written-to group of four registers. That way,
subsequent changes can reproducibly replace the four writes with a
single macro.

Tested on Asus P8Z77-V LX2, still boots.

Change-Id: If7bb14a9862a53a3eba565d17401347dcc9ffbe9
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40973
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>