tree c35374e36508ddf0c10324e9b511c983655213e4
parent a686542d4d6229a512f8ca067bc3e80775b6a356
author Andrew Thoelke <andrew.thoelke@arm.com> 1395312503 +0000
committer Andrew Thoelke <andrew.thoelke@arm.com> 1397573369 +0100

Allocate single stacks for BL1 and BL2

The BL images share common stack management code which provides
one coherent and one cacheable stack for every CPU. BL1 and BL2
just execute on the primary CPU during boot and do not require
the additional CPU stacks. This patch provides separate stack
support code for UP and MP images, substantially reducing the
RAM usage for BL1 and BL2 for the FVP platform.

This patch also provides macros for declaring stacks and
calculating stack base addresses to improve consistency where
this has to be done in the firmware.

The stack allocation source files are now included via
platform.mk rather than the common BLx makefiles. This allows
each platform to select the appropriate MP/UP stack support
for each BL image.

Each platform makefile must be updated when including this
commit.

Fixes ARM-software/tf-issues#76

Change-Id: Ia251f61b8148ffa73eae3f3711f57b1ffebfa632