SAFE public projects git trees. - safe/jmp/linux-2.6/blob - kernel/time/tick-internal.h

   1 /*
   2  * tick internal variable and functions used by low/high res code
   3  */
   4 DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
   5 extern spinlock_t tick_device_lock;
   6 extern ktime_t tick_next_period;
   7 extern ktime_t tick_period;
   8
   9 extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
  10 extern void tick_handle_periodic(struct clock_event_device *dev);
  11
  12 /*
  13  * Broadcasting support
  14  */
  15 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
  16 extern int tick_do_broadcast(cpumask_t mask);
  17 extern struct tick_device tick_broadcast_device;
  18 extern spinlock_t tick_broadcast_lock;
  19
  20 extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
  21 extern int tick_check_broadcast_device(struct clock_event_device *dev);
  22 extern int tick_is_broadcast_device(struct clock_event_device *dev);
  23 extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
  24 extern void tick_shutdown_broadcast(unsigned int *cpup);
  25
  26 extern void
  27 tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
  28
  29 #else /* !BROADCAST */
  30
  31 static inline int tick_check_broadcast_device(struct clock_event_device *dev)
  32 {
  33         return 0;
  34 }
  35
  36 static inline int tick_is_broadcast_device(struct clock_event_device *dev)
  37 {
  38         return 0;
  39 }
  40 static inline int tick_device_uses_broadcast(struct clock_event_device *dev,
  41                                              int cpu)
  42 {
  43         return 0;
  44 }
  45 static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
  46 static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
  47 static inline void tick_shutdown_broadcast(unsigned int *cpup) { }
  48
  49 /*
  50  * Set the periodic handler in non broadcast mode
  51  */
  52 static inline void tick_set_periodic_handler(struct clock_event_device *dev,
  53                                              int broadcast)
  54 {
  55         dev->event_handler = tick_handle_periodic;
  56 }
  57 #endif /* !BROADCAST */
  58
  59 /*
  60  * Check, if the device is functional or a dummy for broadcast
  61  */
  62 static inline int tick_device_is_functional(struct clock_event_device *dev)
  63 {
  64         return !(dev->features & CLOCK_EVT_FEAT_DUMMY);
  65 }