armv8 - fix os_cpu_clock_frequency for armv8 96/5796/2
authorGabriel Ganne <gabriel.ganne@enea.com>
Mon, 20 Mar 2017 14:13:02 +0000 (15:13 +0100)
committerDamjan Marion <dmarion.lists@gmail.com>
Tue, 21 Mar 2017 13:29:20 +0000 (13:29 +0000)
System timer of ARMv8 runs at a different frequency than the CPU's.
The frequency is fixed, typically in the range 1-50MHz.  It can be
read at CNTFRQ special register.

Change-Id: I6a21a6a9e2df783559df0caec63d5525c2258227
Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>

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