hw/arm/bcm2836: Only provide "enabled-cpus" property to multicore SoCs
[qemu.git] / hw / s390x / tod-qemu.c
1 /*
2 * TOD (Time Of Day) clock - QEMU implementation
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 #include "qemu/osdep.h"
12 #include "qemu-common.h"
13 #include "qapi/error.h"
14 #include "hw/s390x/tod.h"
15 #include "qemu/timer.h"
16 #include "qemu/cutils.h"
17 #include "qemu/module.h"
18 #include "cpu.h"
19 #include "tcg_s390x.h"
20
21 static void qemu_s390_tod_get(const S390TODState *td, S390TOD *tod,
22 Error **errp)
23 {
24 *tod = td->base;
25
26 tod->low += time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
27 if (tod->low < td->base.low) {
28 tod->high++;
29 }
30 }
31
32 static void qemu_s390_tod_set(S390TODState *td, const S390TOD *tod,
33 Error **errp)
34 {
35 CPUState *cpu;
36
37 td->base = *tod;
38
39 td->base.low -= time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
40 if (td->base.low > tod->low) {
41 td->base.high--;
42 }
43
44 /*
45 * The TOD has been changed and we have to recalculate the CKC values
46 * for all CPUs. We do this asynchronously, as "SET CLOCK should be
47 * issued only while all other activity on all CPUs .. has been
48 * suspended".
49 */
50 CPU_FOREACH(cpu) {
51 async_run_on_cpu(cpu, tcg_s390_tod_updated, RUN_ON_CPU_NULL);
52 }
53 }
54
55 static void qemu_s390_tod_class_init(ObjectClass *oc, void *data)
56 {
57 S390TODClass *tdc = S390_TOD_CLASS(oc);
58
59 tdc->get = qemu_s390_tod_get;
60 tdc->set = qemu_s390_tod_set;
61 }
62
63 static void qemu_s390_tod_init(Object *obj)
64 {
65 S390TODState *td = S390_TOD(obj);
66 struct tm tm;
67
68 qemu_get_timedate(&tm, 0);
69 td->base.high = 0;
70 td->base.low = TOD_UNIX_EPOCH + (time2tod(mktimegm(&tm)) * 1000000000ULL);
71 if (td->base.low < TOD_UNIX_EPOCH) {
72 td->base.high += 1;
73 }
74 }
75
76 static TypeInfo qemu_s390_tod_info = {
77 .name = TYPE_QEMU_S390_TOD,
78 .parent = TYPE_S390_TOD,
79 .instance_size = sizeof(S390TODState),
80 .instance_init = qemu_s390_tod_init,
81 .class_init = qemu_s390_tod_class_init,
82 .class_size = sizeof(S390TODClass),
83 };
84
85 static void register_types(void)
86 {
87 type_register_static(&qemu_s390_tod_info);
88 }
89 type_init(register_types);