[coreboot-gerrit] [S] Change in coreboot[main]: arch/arm64: Support FEAT_CCIDX

[Yidi Lin (Code Review)]

Attention is currently required from: Julius Werner, Yidi Lin.

Hello Eric Lai, Julius Werner, Paul Menzel, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/82635?usp=email

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

Change subject: arch/arm64: Support FEAT_CCIDX
......................................................................

arch/arm64: Support FEAT_CCIDX

ARM SoC supports FEAT_CCIDX after ARMv8.3. The register field
description of CCSIDR_EL1 is different when FEAT_CCIDX is implemented.
If numsets and associativity from CCSIDR_EL1 are not correct, the system
would hang during mmu_disable().

Rather than assuming that FEAT_CCIDX is not implemented, this patch
adds a check to dcache_apply_all to use the right register format.

Reference:
- https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/12770

BUG=b:317015456
TEST=mmu_disable works on the FEAT_CCIDX supported SoC.
TEST=manually add mmu_disable to emulation/qemu-aarch64/bootblock.c and
     verify with the command
     qemu-system-aarch64 -bios \
     ./coreboot-builds/EMULATION_QEMU_AARCH64/coreboot.rom -M \
     virt,secure=on,virtualization=on -cpu max -cpu cortex-a710 \
     -nographic -m 8192M

Change-Id: Ieadd0d9dfb8911039b3d36c9419af4ae04ed814c
Signed-off-by: Yidi Lin 
---
M src/arch/arm64/armv8/cpu.S
1 file changed, 18 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/35/82635/3