Andrew Turner 23982ffd47 Start to support multiple stages in the arm64 pmap.
On arm64 the stage 1 and stage 2 pte formats are similar enough we can
reuse the pmap code for both. As they are only similar and not identical
we need to know if we are managing stage 1 or stage 2 tables.

Add an enum to store this information and a check to make sure it is
set to stage 1 when we manage stage 1 pte fields.

Sponsored by:	Innovate UK
Differential Revision:	https://reviews.freebsd.org/D23830
2020-02-26 11:47:24 +00:00
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