tree 27332b99c85e6c40f3a207472f62e4c2375b0339
parent 26edb8ab4ad5426204b5ad2530c28160a80a46a3
author Varun Wadekar <vwadekar@nvidia.com> 1427966867 +0530
committer Dan Handley <dan.handley@arm.com> 1428941876 +0100

Pass arguments/results between EL3/S-EL1 via CPU registers (x0-x7)

This patch removes the need for a shared buffer between the EL3 and S-EL1
levels. We now use the CPU registers, x0-x7, while passing data between
the two levels. Since TLK is a 32-bit Trusted OS, tlkd has to unpack the
arguments in the x0-x7 registers. TLK in turn gets these values via r0-r7.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>