1/*
2 * TOD (Time Of Day) clock
3 *
4 * Copyright 2018 Red Hat, Inc.
5 * Author(s): David Hildenbrand <david@redhat.com>
6 *
7 * This work is licensed under the terms of the GNU GPL, version 2 or later.
8 * See the COPYING file in the top-level directory.
9 */
10
11#ifndef TARGET_S390_TOD_H
12#define TARGET_S390_TOD_H
13
14/* The value of the TOD clock for 1.1.1970. */
15#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
16
17/* Converts ns to s390's clock format */
18static inline uint64_t time2tod(uint64_t ns)
19{
20 return (ns << 9) / 125 + (((ns & 0xff80000000000000ull) / 125) << 9);
21}
22
23/* Converts s390's clock format to ns */
24static inline uint64_t tod2time(uint64_t t)
25{
26 return ((t >> 9) * 125) + (((t & 0x1ff) * 125) >> 9);
27}
28
29#endif
30