30 lines
719 B
C
30 lines
719 B
C
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/*
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* TOD (Time Of Day) clock
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*
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* Copyright 2018 Red Hat, Inc.
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* Author(s): David Hildenbrand <david@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef TARGET_S390_TOD_H
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#define TARGET_S390_TOD_H
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/* The value of the TOD clock for 1.1.1970. */
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#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
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/* Converts ns to s390's clock format */
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static inline uint64_t time2tod(uint64_t ns)
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{
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return (ns << 9) / 125 + (((ns & 0xff80000000000000ull) / 125) << 9);
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}
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/* Converts s390's clock format to ns */
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static inline uint64_t tod2time(uint64_t t)
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{
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return ((t >> 9) * 125) + (((t & 0x1ff) * 125) >> 9);
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}
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#endif
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