tree 0269d94958a60ca9312fb3a4b921c6fc843686b2
parent 455065c25f82f05dab4971e54ed8a3f43b1c6e2f
author Andrew Scull <ascull@google.com> 1536242916 +0100
committer Andrew Scull <ascull@google.com> 1536943493 +0100

mm: treat level 0 page entries as blocks.

This simplifies the abstraction so all page table levels have entries
that are:

   1. absent
   2. tables -- references a next level table
   3. block -- references a memory block, including a basic page

The arch implementation is left to handle the differences in
representation at the different levels.

Change-Id: If0d65d6ee727a699eb60d2375e1fda282e8ee3a8