Nathan Whitehorn 0081393d79 Do not rely on firmware having pre-enabled the MMU in a reasonable way for
late boot: enable it explicitly after installing the page tables. If booting
from an FDT, also make sure to escape the firmware's MMU context early
before overwriting firmware page tables.

Approved by:	re (gjb)
2016-06-29 14:40:43 +00:00
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