1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
* TOD (Time Of Day) clock
*
* Copyright 2018 Red Hat, Inc.
* Author(s): David Hildenbrand <david@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef HW_S390_TOD_H
#define HW_S390_TOD_H
#include "hw/qdev.h"
typedef struct S390TOD {
uint8_t high;
uint64_t low;
} S390TOD;
#define TYPE_S390_TOD "s390-tod"
#define S390_TOD(obj) OBJECT_CHECK(S390TODState, (obj), TYPE_S390_TOD)
#define S390_TOD_CLASS(oc) OBJECT_CLASS_CHECK(S390TODClass, (oc), \
TYPE_S390_TOD)
#define S390_TOD_GET_CLASS(obj) OBJECT_GET_CLASS(S390TODClass, (obj), \
TYPE_S390_TOD)
#define TYPE_KVM_S390_TOD TYPE_S390_TOD "-kvm"
#define TYPE_QEMU_S390_TOD TYPE_S390_TOD "-qemu"
typedef struct S390TODState {
/* private */
DeviceState parent_obj;
/*
* Used by TCG to remember the time base. Used by KVM to backup the TOD
* while the TOD is stopped.
*/
S390TOD base;
/* Used by KVM to remember if the TOD is stopped and base is valid. */
bool stopped;
} S390TODState;
typedef struct S390TODClass {
/* private */
DeviceClass parent_class;
void (*parent_realize)(DeviceState *dev, Error **errp);
/* public */
void (*get)(const S390TODState *td, S390TOD *tod, Error **errp);
void (*set)(S390TODState *td, const S390TOD *tod, Error **errp);
} S390TODClass;
/* The value of the TOD clock for 1.1.1970. */
#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
/* Converts ns to s390's clock format */
static inline uint64_t time2tod(uint64_t ns)
{
return (ns << 9) / 125 + (((ns & 0xff80000000000000ull) / 125) << 9);
}
/* Converts s390's clock format to ns */
static inline uint64_t tod2time(uint64_t t)
{
return ((t >> 9) * 125) + (((t & 0x1ff) * 125) >> 9);
}
void s390_init_tod(void);
S390TODState *s390_get_todstate(void);
#endif
|
