tree 4cf20542c5219393010b1285dd88de5b0e2a519e
parent 9851e42014ff07ba533f142762254d2c34fa2d31
author Vikram Kanigiri <vikram.kanigiri@arm.com> 1400174835 +0100
committer Vikram Kanigiri <vikram.kanigiri@arm.com> 1400769803 +0100

Rework handover interface between BL stages

This patch reworks the handover interface from: BL1 to BL2 and
BL2 to BL3-1. It removes the raise_el(), change_el(), drop_el()
and run_image() functions as they catered for code paths that were
never exercised.
BL1 calls bl1_run_bl2() to jump into BL2 instead of doing the same
by calling run_image(). Similarly, BL2 issues the SMC to transfer
execution to BL3-1 through BL1 directly. Only x0 and x1 are used
to pass arguments to BL31. These arguments and parameters for
running BL3-1 are passed through a reference to a
'el_change_info_t' structure. They were being passed value in
general purpose registers earlier.

Change-Id: Id4fd019a19a9595de063766d4a66295a2c9307e1