tree 2b5a151d7b9810cab6de7ad26e96321fed431a9d
parent 3140a9e5c7d524eb1ea1648ae7c26e61fe7d740c
author Achin Gupta <achin.gupta@arm.com> 1386005584 +0000
committer Dan Handley <dan.handley@arm.com> 1386246530 +0000

psci: rectify and homogenise generic code

This patch performs a major rework of the psci generic implementation
to achieve the following:

1. replace recursion with iteration where possible to aid code
   readability e.g. affinity instance states are changed iteratively
   instead of recursively.

2. acquire pointers to affinity instance nodes at the beginning of a
   psci operation. All subsequent actions use these pointers instead
   of calling psci_get_aff_map_node() repeatedly e.g. management of
   locks has been abstracted under functions which use these pointers
   to ensure correct ordering. Helper functions have been added to
   create these abstractions.

3. assertions have been added to cpu level handlers to ensure correct
   state transition

4. the affinity level extents specified to various functions have the
   same meaning i.e. start level is always less than the end level.

Change-Id: If0508c3a7b20ea3ddda2a66128429382afc3dfc8