K 10
svn:author
V 8
jhibbits
K 8
svn:date
V 27
2016-08-24T03:51:40.666717Z
K 7
svn:log
V 523
Fix system hang when large FDT is in use

Summary:
Kernel maps only one page of FDT. When FDT is more than one page in size, data
TLB miss occurs on memmove() when FDT is moved to kernel storage
(sys/powerpc/booke/booke_machdep.c, booke_init())

This introduces a pmap_early_io_unmap() to complement pmap_early_io_map(), which
can be used for any early I/O mapping, but currently is only used when mapping
the fdt.

Submitted by:	Ivan Krivonos <int0dster_gmail.com>
Differential Revision: https://reviews.freebsd.org/D7605

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