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plat-sam: implement PL310 SMC protocol #7004

Closed TonyHan11 closed 2 months ago

TonyHan11 commented 2 months ago

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.

TonyHan11 commented 2 months ago

Review tags added.