Rework common init C code

In init_platform() we initialize a UART and announce the presence of the
bootwrapper to the world. We do this relatively late in the boot-flow,
and prior to this will silently ignore errors (e.g. in gic_secure_init).

To make it possible to provide improved diagnostics, and to allow us to
move more initialization into C, this patch reworks the init code to
call a C function earlier, where we can announce the presence of the
boot-wrapper and perform other initialization.

In subsequent patches this will be expanded with more CPU
initialization.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
7 files changed