plat-sam: implement PL310 SMC protocol

When Linux runs in normal world, it expects the PL310 to be initially
disabled, and then invokes SMCs to enable it.
Let CFG_PL310_SIP_PROTOCOL=y, and the L2 ca

plat-sam: implement PL310 SMC protocol

When Linux runs in normal world, it expects the PL310 to be initially
disabled, and then invokes SMCs to enable it.
Let CFG_PL310_SIP_PROTOCOL=y, and the L2 cache will be left untouched
until the OS enables it.

Signed-off-by: Tony Han <tony.han@microchip.com>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>

show more ...