tree 9723aeb849af9bf51781563026e80e0078caa500
parent 0e7d38739f4869fdf2e35f52acacb42dcd3faba6
author Andres AG <andres.amayagarcia@arm.com> 1471860530 +0100
committer Simon Butcher <simon.butcher@arm.com> 1472572248 +0100

Add a new self test to entropy module

The self test is a quick way to check at startup whether the entropy
sources are functioning correctly. The self test only polls 8 bytes
from the default entropy source and performs the following checks:

- The bytes are not all 0x00 or 0xFF.
- The hardware does not return an error when polled.
- The entropy does not provide data in a patter. Only check pattern
  at byte, word and long word sizes.