K 10
svn:author
V 3
zbb
K 8
svn:date
V 27
2015-07-21T12:50:45.959841Z
K 7
svn:log
V 240
Implement get_cyclecount() on ARM64

Use Vritual Counter register associated with Generic Timer to
read the cyclecount.

Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3134

END