LXR qemu/include/hw/s390x/tod.h

   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 HW_S390_TOD_H
  12#define HW_S390_TOD_H
  13
  14#include "hw/qdev.h"
  15#include "s390-tod.h"
  16
  17typedef struct S390TOD {
  18    uint8_t high;
  19    uint64_t low;
  20} S390TOD;
  21
  22#define TYPE_S390_TOD "s390-tod"
  23#define S390_TOD(obj) OBJECT_CHECK(S390TODState, (obj), TYPE_S390_TOD)
  24#define S390_TOD_CLASS(oc) OBJECT_CLASS_CHECK(S390TODClass, (oc), \
  25                                              TYPE_S390_TOD)
  26#define S390_TOD_GET_CLASS(obj) OBJECT_GET_CLASS(S390TODClass, (obj), \
  27                                                 TYPE_S390_TOD)
  28#define TYPE_KVM_S390_TOD TYPE_S390_TOD "-kvm"
  29#define TYPE_QEMU_S390_TOD TYPE_S390_TOD "-qemu"
  30
  31typedef struct S390TODState {
  32    /* private */
  33    DeviceState parent_obj;
  34
  35    /*
  36     * Used by TCG to remember the time base. Used by KVM to backup the TOD
  37     * while the TOD is stopped.
  38     */
  39    S390TOD base;
  40    /* Used by KVM to remember if the TOD is stopped and base is valid. */
  41    bool stopped;
  42} S390TODState;
  43
  44typedef struct S390TODClass {
  45    /* private */
  46    DeviceClass parent_class;
  47    void (*parent_realize)(DeviceState *dev, Error **errp);
  48
  49    /* public */
  50    void (*get)(const S390TODState *td, S390TOD *tod, Error **errp);
  51    void (*set)(S390TODState *td, const S390TOD *tod, Error **errp);
  52} S390TODClass;
  53
  54void s390_init_tod(void);
  55S390TODState *s390_get_todstate(void);
  56
  57#endif
  58