K 10
svn:author
V 8
jhibbits
K 8
svn:date
V 27
2020-04-11T00:12:34.447886Z
K 7
svn:log
V 344
powerpc/booke: Change Book-E 64-bit pmap to 4-level table

Summary:
The existing page table is fraught with errors, since it creates a hole
in the address space bits.  Fix this by taking a cue from the POWER9
radix pmap, and make the page table 4 levels, 52 bits.

Reviewed by:	bdragon
Differential Revision:	https://reviews.freebsd.org/D24220

END