[coreboot-gerrit] Change in coreboot[master]: [WIP]cpu/x86/cache: CLFLUSH programs to memory before running

[Arthur Heymans (Code Review)]

Hello Subrata Banik, build bot (Jenkins), Patrick Georgi, Martin Roth,

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

https://review.coreboot.org/c/coreboot/+/37196

to look at the new patch set (#2).

Change subject: [WIP]cpu/x86/cache: CLFLUSH programs to memory before running
......................................................................

[WIP]cpu/x86/cache: CLFLUSH programs to memory before running

When cbmem is initialized in romstage and postcar placed in
the stage cache + cbmem where it is run, the assumption is made
that this are all in UC memory such that calling invd in
postcar is ok.

For performance reasons (e.g. postcar decompression) it is desirable
to cache cbmem and the stage cache during romstage. Another reason
is that AGESA sets up MTRR during romstage to cache all dram, which
is currently worked around by using additional MTRR to make that UC.

TODO be nice to reviewers and spit some parts off.

UNTESTED

Change-Id: I7ff2a57aee620908b71829457ea0f5a0c410ec5b
Signed-off-by: Arthur Heymans 
---
M src/arch/x86/postcar_loader.c
M src/cpu/x86/cache/Makefile.inc
M src/cpu/x86/cache/cache.c
M src/include/cpu/x86/cache.h
4 files changed, 75 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/96/37196/2