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 */ |
18 | static 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 */ |
24 | static inline uint64_t tod2time(uint64_t t) |
25 | { |
26 | return ((t >> 9) * 125) + (((t & 0x1ff) * 125) >> 9); |
27 | } |
28 | |
29 | #endif |
30 | |