From: Thierry Reding treding@nvidia.com
Some platforms have the means to determine the counter frequency at runtime, so give them an opportunity to do so.
Signed-off-by: Thierry Reding treding@nvidia.com --- arch/arm/cpu/armv8/start.S | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S index e70bed462a59..da45d984d01a 100644 --- a/arch/arm/cpu/armv8/start.S +++ b/arch/arm/cpu/armv8/start.S @@ -54,8 +54,10 @@ reset: orr x0, x0, #0xf /* SCR_EL3.NS|IRQ|FIQ|EA */ msr scr_el3, x0 msr cptr_el3, xzr /* Enable FP/SIMD */ +#ifdef COUNTER_FREQUENCY ldr x0, =COUNTER_FREQUENCY msr cntfrq_el0, x0 /* Initialize CNTFRQ */ +#endif b 0f 2: msr vbar_el2, x0 mov x0, #0x33ff