tree c3cd065d0ac34d9bc09af2a53d3cf64695329c89
parent 1d95fe4d3de42e915bc22d5fd6cd4de103c5e517
author Guo Ren <ren_guo@c-sky.com> 1545220574 +0800
committer Guo Ren <ren_guo@c-sky.com> 1546268633 +0800

csky: CPU-hotplug supported for SMP

This is a simple implement of CPU-hotplug for power saving. CPU use
wait instruction to enter power saving mode and waiting for IPI wakeup
signal.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>