tree 120f22e9214df6f06eea28c7aa8de5fb1a844c67
parent abf88fb1b5db4c8b3973fcda06959b8716e0831d
author Andrew Scull <ascull@google.com> 1557755162 +0100
committer Andrew Scull <ascull@google.com> 1561125381 +0100

Helpers for memory mapped IO.

This logic can be shared between architecture and drivers. The addresses
for memory mapped IO have an opaque type to avoid accidental misuse and
arrays have an associated size so overflows can be detected. Accessor
functions make the use if IO clear and optionally add memory barriers.

Change-Id: I59d82bd2ee7d41e0ab61438ca0ccf10b46f23c54