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34 lines
722 B
C++
34 lines
722 B
C++
/*
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* \brief Trace timestamp
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* \author Stefan Kalkowski
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* \date 2013-08-20
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*
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* Serialized reading of performance counter on ARM.
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*/
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/*
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* Copyright (C) 2013-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__SPEC__ARM_V7__TRACE__TIMESTAMP_H_
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#define _INCLUDE__SPEC__ARM_V7__TRACE__TIMESTAMP_H_
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#include <base/fixed_stdint.h>
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namespace Genode { namespace Trace {
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typedef uint32_t Timestamp;
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inline Timestamp timestamp()
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{
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uint32_t t;
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asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(t));
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return t;
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}
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} }
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#endif /* _INCLUDE__SPEC__ARM_V7__TRACE__TIMESTAMP_H_ */
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