[coreboot-gerrit] Change in coreboot[master]: soc/amd/picasso: add monotonic_timer

[Kangheui Won (Code Review)]

Hello build bot (Jenkins), Martin Roth, Furquan Shaikh, Patrick Georgi, Rob Barnes, Eric Peers,

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

https://review.coreboot.org/c/coreboot/+/46058

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

Change subject: soc/amd/picasso: add monotonic_timer
......................................................................

soc/amd/picasso: add monotonic_timer

On Zork(picasso) platform we run verstage on the PSP. It has its own
timer, but the frequency is not matched with TSC.

To ease the work to merge timestamps from the PSP and TSC, add a layer
around tsc to have microsecond granularity for timestamp table. PSP
already records timestamp in microseconds.

BUG=b:159220781
BRANCH=zork
TEST=build, flash and boot, check timestamps are correct

Signed-off-by: Kangheui Won 
Change-Id: Ifced4a84071be8da547e252167ec21cd42f20ccc
---
M src/soc/amd/picasso/Kconfig
M src/soc/amd/picasso/Makefile.inc
A src/soc/amd/picasso/monotonic_timer.c
3 files changed, 22 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/58/46058/2