arm64: provide API for coordinating secondary CPU bringup

Provides a minimal API for coordinating with the SoC for
bringing up the secondary CPUs. There's no eventloop or
dispatcher currently nor does it do anything proper when
one of the secondary CPUs are brought up. Those decisions
are deferred to the SoC.

TEST=Built and brought up 2nd cpu using this API.

Change-Id: I8ac0418282e2e5b4ab3abfd21c88f51d704e10f9
Signed-off-by: Patrick Georgi <>
Original-Commit-Id: 5303ae3d6bfc9f8f908fcb890e184eb9b57f1376
Original-Change-Id: I3b7334b7d2df2df093cdc0cbb997e8230d3b2685
Original-Signed-off-by: Aaron Durbin <>
Original-Reviewed-by: Furquan Shaikh <>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <>
2 files changed