[M] Change in coreboot[main]: arch/arm64: Support calling a trusted monitor

[Benjamin Doron (Code Review)]

Attention is currently required from: Arthur Heymans, Benjamin Doron, David Milosevic.

Hello David Milosevic, Julius Werner, Lean Sheng Tan, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/78284?usp=email

to look at the new patch set (#19).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: arch/arm64: Support calling a trusted monitor
......................................................................

arch/arm64: Support calling a trusted monitor

Implement support for generating an SMC to call a trusted monitor. Some
functions are provided to read the SoC ID from the monitor, if
supported.

Change-Id: I158db0b971aba722b3995d52162146aa406d1644
Signed-off-by: Benjamin Doron 
---
M src/arch/arm64/Makefile.mk
A src/arch/arm64/include/armv8/arch/smc.h
A src/arch/arm64/smc.c
A src/arch/arm64/smc_asm.S
4 files changed, 140 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/84/78284/19