54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright © International Business Machines Corp., 2006-2008
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*
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* AUTHOR
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* Darren Hart <dvhltc@us.ibm.com>
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* Giuseppe Cavallaro <peppe.cavallarost.com>
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*
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* HISTORY
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* It directly comes from the librttest.h (see its HISTORY).
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*/
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#ifndef TST_TSC_H
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#define TST_TSC_H
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#undef TSC_UNSUPPORTED
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/* TSC macros */
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#if defined(__i386__)
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#define rdtscll(val) __asm__ __volatile__("rdtsc" : "=A" (val))
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#elif defined(__x86_64__)
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#define rdtscll(val) \
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do { \
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uint32_t low, high; \
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__asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high)); \
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val = (uint64_t)high << 32 | low; \
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} while (0)
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#elif defined(__powerpc__)
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#if defined(__powerpc64__) /* 64bit version */
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#define rdtscll(val) \
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do { \
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__asm__ __volatile__ ("mfspr %0, 268" : "=r" (val)); \
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} while (0)
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#else /*__powerpc__ 32bit version */
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#define rdtscll(val) \
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do { \
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uint32_t tbhi, tblo ; \
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__asm__ __volatile__ ("mftbu %0" : "=r" (tbhi)); \
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__asm__ __volatile__ ("mftbl %0" : "=r" (tblo)); \
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val = 1000 * ((uint64_t) tbhi << 32) | tblo; \
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} while (0)
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#endif
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#else
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#warning TSC UNSUPPORTED
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/* All tests will be compiled also for the
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* architecture without TSC support (e.g. SH).
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* At run-time these will fail with ENOTSUP.
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*/
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#define rdtscll(val) do { } while (0)
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#define TSC_UNSUPPORTED
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#endif
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#endif
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