base: timestamp support for ARM 64-Bit

issue #3407
2019-06-04 21:17:10 +02:00 · 2019-06-04 21:17:10 +02:00 · 1b489820a9
parent ef8140cce5
commit 1b489820a9
1 changed files with 5 additions and 1 deletions
--- a/repos/base/include/spec/arm_64/trace/timestamp.h
+++ b/repos/base/include/spec/arm_64/trace/timestamp.h
@ -1,6 +1,7 @@
 /*
 * \brief  Trace timestamp
 * \author Stefan Kalkowski
+ * \author Sebastian Sumpf
 * \date   2019-03-25
 */

@ -22,7 +23,10 @@ namespace Genode { namespace Trace {

 	inline Timestamp timestamp()
 	{
-		return 0;
+		uint64_t t;
+		/* cycle counter */
+		asm volatile("mrs %0, pmccntr_el0" : "=r" (t));
+		return t;
 	}
 } }