tree b94c1e8eda79d4a43686436b507addf313c5dd4a
parent 655837973feb51da3767f5f246ec198877900b0b
author ZhikuiRen <zhikui.ren@intel.com> 1580336744 -0800
committer Zhikui Ren <zhikui.ren@intel.com> 1583453461 -0800

Add timestamp to BIOS POST Codes log and DeleteAll interface

Added GetPostCodesWithTimeStamp methods to PostCode interface.
GetPostCodesWithTimeStamp logs timestamp in microseconds since epoch
together with each post code.

Added DeleteAll method to remove existing logs and
reset currentBootCycleIndex to 1.

Tested:
Build with changes in phosphor-dbus-interfaces.
Invoked GetPostCodesWithTimeStamp with busctl and observed expected format:
("US since Epoch":, Post Code)
"1580923291420015": 1,
"1580923291428076": 2,

Invoke DeleteAll and verify GetPostCodes returns no code afterwards,
and CurrentBootiCycleCount is reset to 1.

Cycled host power more than 100 times and observed that CurrentBootCycleCount
increments until it reached MaxBootCycleNum.

Verified GetPostCodes and GetPostCodesWithTimeStamp respond correctly with
index 1 being the most recent boot cycle, CurrentBootCycleCount being
the oldest boot cycle.

Change-Id: I4f222fce0eba38c65f468d8bd186079e0883da6e
Signed-off-by: ZhikuiRen <zhikui.ren@intel.com>