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