tree 495f724c1b155df73528758037e068b51827e949
parent 42aa5eb1dc1ab66105553dfb05122a5601e8f721
author Soby Mathew <soby.mathew@arm.com> 1411384296 +0100
committer Soby Mathew <soby.mathew@arm.com> 1414604336 +0000

Apply errata workarounds only when major/minor revisions match.

Prior to this patch, the errata workarounds were applied for any version
of the CPU in the release build and in the debug build an assert
failure resulted when the revision did not match. This patch applies
errata workarounds in the Cortex-A57 reset handler only if the 'variant'
and 'revision' fields read from the MIDR_EL1 match. In the debug build,
a warning message is printed for each errata workaround which is not
applied.

The patch modifies the register usage in 'reset_handler` so
as to adhere to ARM procedure calling standards.

Fixes ARM-software/tf-issues#242

Change-Id: I51b1f876474599db885afa03346e38a476f84c29