[coreboot-gerrit] Change in coreboot[master]: soc/amd/*: Make mtrr decision based on syscfg

[Arthur Heymans (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Marshall Dawson, Fred Reitberger, Felix Held.
Hello Jason Glenesk, Raul Rangel, Marshall Dawson, Fred Reitberger, Felix Held,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/64868

to look at the new patch set (#3).

Change subject: soc/amd/*: Make mtrr decision based on syscfg
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soc/amd/*: Make mtrr decision based on syscfg

The syscfg has to option to automatically mark the range between 4G and
TOM2, which contains DRAM, as WB. Making it generally not necessary to
allocate MTRRs for memory above 4G if no PCI BARs are placed up there.

Change-Id: Ifbacae28e272ab2f39f268ad034354a9c590d035
Signed-off-by: Arthur Heymans 
---
M src/soc/amd/cezanne/cpu.c
M src/soc/amd/picasso/cpu.c
M src/soc/amd/sabrina/cpu.c
M src/soc/amd/stoneyridge/cpu.c
4 files changed, 41 insertions(+), 21 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/68/64868/3