[coreboot-gerrit] Change in coreboot[master]: intel/fsp2_0: Move temporary RAM to .bss with FSP_USES_CB_STACK

[Kyösti Mälkki (Code Review)]

Hello Aaron Durbin, Patrick Rudolph, Nathaniel L Desimone, Subrata Banik, Tim Wawrzynczak, Shelley Chen, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/35233

to look at the new patch set (#4).

Change subject: intel/fsp2_0: Move temporary RAM to .bss with FSP_USES_CB_STACK
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intel/fsp2_0: Move temporary RAM to .bss with FSP_USES_CB_STACK

The documentation for StackBase and StackSize in FSPM_ARCH_UPD is
confusing. Previously the region was shared for heap and stack,
starting with FSP2.1 only for heap (or 'temporary RAM') for HOBs.

Moving the allocation outside DCACHE_BSP_STACK_SIZE allows use of
stack guards and reduces amount of reserved CAR for bootblock and
verstage, as the new allocation in .bss is only taken in romstage.

BUG=b:140268415

Change-Id: I4cffcc73a89cb97ab7759dd373196ce9753a6307
Signed-off-by: Kyösti Mälkki 
---
M src/drivers/intel/fsp2_0/Kconfig
M src/drivers/intel/fsp2_0/memory_init.c
2 files changed, 20 insertions(+), 12 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/35233/4