the following patch was just integrated into master:
commit 5dac6d8ac870bcac7959ad24893161bf6a133ab6
Author: Kyösti Mälkki <[email protected]>
Date: Fri Jul 27 08:42:20 2012 +0300
Intel and GFXUMA: fix MTRR and use uma_resource()
Commit 2d42b340034ff005693482ef9ca34ce3e0f08371 changed the
variable MTRR setup and removed compensation of uma_memory_size in
the cacheable memory resources.
Since the cacheable region size was no longer divisible by a large
power of 2, like 256 MB, this caused excessive use of MTRRs.
As first symptoms, slow boot with grub and poor user response.
As a solution, register the actual top of low ram with ram_resource(),
and do not subtract the UMA/TSEG regions from it.
TSEG may require further work as the original did not appear exactly
right to begin with. To have UMA as un-cacheable, use uma_resource().
Change-Id: I4ca99b5c2ca4e474296590b3d0c6ef5d09550d80
Signed-off-by: Kyösti Mälkki <[email protected]>
Build-Tested: build bot (Jenkins) at Fri Jul 27 15:50:22 2012, giving +1
Reviewed-By: Anton Kochkov <[email protected]> at Fri Jul 27 14:08:05
2012, giving +2
See http://review.coreboot.org/1239 for details.
-gerrit
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