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 "target/s390x/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 typedef struct S390TODClass S390TODClass;
  25 typedef struct S390TODState S390TODState;
  26 DECLARE_OBJ_CHECKERS(S390TODState, S390TODClass,
  27                      S390_TOD, TYPE_S390_TOD)
  28 #define TYPE_KVM_S390_TOD TYPE_S390_TOD "-kvm"
  29 #define TYPE_QEMU_S390_TOD TYPE_S390_TOD "-qemu"
  30
  31 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 };
  43
  44 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 };
  53
  54 void s390_init_tod(void);
  55 S390TODState *s390_get_todstate(void);
  56
  57 #endif