/*
   * tick internal variable and functions used by low/high res code
   */

  #include <linux/hrtimer.h>
  #include <linux/tick.h>

  #ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD

  
  #define TICK_DO_TIMER_NONE	-1
  #define TICK_DO_TIMER_BOOT	-2

  DECLARE_PER_CPU(struct tick_device, tick_cpu_device);

  extern ktime_t tick_next_period;
  extern ktime_t tick_period;

  extern int tick_do_timer_cpu __read_mostly;

  
  extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
  extern void tick_handle_periodic(struct clock_event_device *dev);

  extern void clockevents_shutdown(struct clock_event_device *dev);

  /*

   * NO_HZ / high resolution timer shared code
   */
  #ifdef CONFIG_TICK_ONESHOT
  extern void tick_setup_oneshot(struct clock_event_device *newdev,
  			       void (*handler)(struct clock_event_device *),
  			       ktime_t nextevt);
  extern int tick_program_event(ktime_t expires, int force);
  extern void tick_oneshot_notify(void);
  extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *));

  extern void tick_resume_oneshot(void);

  # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
  extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc);
  extern void tick_broadcast_oneshot_control(unsigned long reason);
  extern void tick_broadcast_switch_to_oneshot(void);
  extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup);

  extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc);

  extern int tick_broadcast_oneshot_active(void);

  extern void tick_check_oneshot_broadcast(int cpu);

  bool tick_broadcast_oneshot_available(void);

  # else /* BROADCAST */
  static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
  {
  	BUG();
  }
  static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
  static inline void tick_broadcast_switch_to_oneshot(void) { }
  static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }

  static inline int tick_broadcast_oneshot_active(void) { return 0; }

  static inline void tick_check_oneshot_broadcast(int cpu) { }

  static inline bool tick_broadcast_oneshot_available(void) { return true; }

  # endif /* !BROADCAST */
  
  #else /* !ONESHOT */
  static inline
  void tick_setup_oneshot(struct clock_event_device *newdev,
  			void (*handler)(struct clock_event_device *),
  			ktime_t nextevt)
  {
  	BUG();
  }

  static inline void tick_resume_oneshot(void)
  {
  	BUG();
  }

  static inline int tick_program_event(ktime_t expires, int force)
  {
  	return 0;
  }
  static inline void tick_oneshot_notify(void) { }
  static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
  {
  	BUG();
  }
  static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
  static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }

  static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
  {
  	return 0;
  }

  static inline int tick_broadcast_oneshot_active(void) { return 0; }

  static inline bool tick_broadcast_oneshot_available(void) { return false; }

  #endif /* !TICK_ONESHOT */
  
  /*

   * Broadcasting support
   */
  #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST

  extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
  extern int tick_check_broadcast_device(struct clock_event_device *dev);
  extern int tick_is_broadcast_device(struct clock_event_device *dev);
  extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
  extern void tick_shutdown_broadcast(unsigned int *cpup);

  extern void tick_suspend_broadcast(void);
  extern int tick_resume_broadcast(void);

  
  extern void
  tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
  
  #else /* !BROADCAST */
  
  static inline int tick_check_broadcast_device(struct clock_event_device *dev)
  {
  	return 0;
  }
  
  static inline int tick_is_broadcast_device(struct clock_event_device *dev)
  {
  	return 0;
  }
  static inline int tick_device_uses_broadcast(struct clock_event_device *dev,
  					     int cpu)
  {
  	return 0;
  }
  static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
  static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
  static inline void tick_shutdown_broadcast(unsigned int *cpup) { }

  static inline void tick_suspend_broadcast(void) { }
  static inline int tick_resume_broadcast(void) { return 0; }

  
  /*
   * Set the periodic handler in non broadcast mode
   */
  static inline void tick_set_periodic_handler(struct clock_event_device *dev,
  					     int broadcast)
  {
  	dev->event_handler = tick_handle_periodic;
  }
  #endif /* !BROADCAST */
  
  /*
   * Check, if the device is functional or a dummy for broadcast
   */
  static inline int tick_device_is_functional(struct clock_event_device *dev)
  {
  	return !(dev->features & CLOCK_EVT_FEAT_DUMMY);
  }

  #endif

  extern void do_timer(unsigned long ticks);
  extern seqlock_t xtime_lock;