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Since the timer and timeout handling is part of the base library (the dynamic linker), it belongs to the base repository. Besides moving the timer and its related infrastructure (alarm, timeout libs, tests) to the base repository, this patch also moves the timer from the 'drivers' subdirectory directly to 'src' and disamibuates the timer's build locations for the various kernels. Otherwise the different timer implementations could interfere with each other when using one build directory with multiple kernels. Note that this patch changes the include paths for the former os/timer, os/alarm.h, os/duration.h, and os/timed_semaphore.h to base/. Issue #3101
45 lines
931 B
C++
45 lines
931 B
C++
/*
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* \brief Trace timestamp
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* \author Josef Soentgen
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* \date 2013-02-12
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*
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* Serialized reading of tsc on x86_64.
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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__X86_64__TRACE__TIMESTAMP_H_
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#define _INCLUDE__SPEC__X86_64__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 uint64_t Timestamp;
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inline Timestamp timestamp() __attribute((always_inline));
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inline Timestamp timestamp()
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{
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uint32_t lo, hi;
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__asm__ __volatile__ (
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"xorl %%eax,%%eax\n\t"
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"cpuid\n\t"
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:
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:
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: "%rax", "%rbx", "%rcx", "%rdx"
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);
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__asm__ __volatile__ (
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"rdtsc" : "=a" (lo), "=d" (hi)
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);
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return (uint64_t)hi << 32 | lo;
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}
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} }
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#endif /* _INCLUDE__SPEC__X86_64__TRACE__TIMESTAMP_H_ */
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