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base: timestamp support for ARM 64-Bit

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issue #3407
This commit is contained in:
Sebastian Sumpf 2019-06-04 21:17:10 +02:00 committed by Christian Helmuth
parent ef8140cce5
commit 1b489820a9
1 changed files with 5 additions and 1 deletions
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6
repos/base/include/spec/arm_64/trace/timestamp.h
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@ -1,6 +1,7 @@
/* /*
* \brief Trace timestamp * \brief Trace timestamp
* \author Stefan Kalkowski * \author Stefan Kalkowski
* \author Sebastian Sumpf
* \date 2019-03-25 * \date 2019-03-25
*/ */
@ -22,7 +23,10 @@ namespace Genode { namespace Trace {
inline Timestamp timestamp() inline Timestamp timestamp()
{ {
return 0; uint64_t t;
/* cycle counter */
asm volatile("mrs %0, pmccntr_el0" : "=r" (t));
return t;
} }
} } } }