/*
   * IRQ subsystem internal functions and variables:

   *
   * Do not ever include this file from anything else than
   * kernel/irq/. Do not even think about using any information outside
   * of this file for your non core code.

   */

  #include <linux/irqdesc.h>

  #ifdef CONFIG_SPARSE_IRQ
  # define IRQ_BITMAP_BITS	(NR_IRQS + 8196)
  #else
  # define IRQ_BITMAP_BITS	NR_IRQS
  #endif

  #define istate core_internal_state__do_not_mess_with_it

  extern bool noirqdebug;

  /*
   * Bits used by threaded handlers:
   * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
   * IRQTF_DIED      - handler thread died
   * IRQTF_WARNED    - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
   * IRQTF_AFFINITY  - irq thread is requested to adjust affinity

   * IRQTF_FORCED_THREAD  - irq action is force threaded

   */
  enum {
  	IRQTF_RUNTHREAD,
  	IRQTF_DIED,
  	IRQTF_WARNED,
  	IRQTF_AFFINITY,

  	IRQTF_FORCED_THREAD,

  };

  /*
   * Bit masks for desc->state
   *
   * IRQS_AUTODETECT		- autodetection in progress

   * IRQS_SPURIOUS_DISABLED	- was disabled due to spurious interrupt
   *				  detection

   * IRQS_POLL_INPROGRESS		- polling in progress

   * IRQS_ONESHOT			- irq is not unmasked in primary handler

   * IRQS_REPLAY			- irq is replayed
   * IRQS_WAITING			- irq is waiting

   * IRQS_PENDING			- irq is pending and replayed later

   * IRQS_SUSPENDED		- irq is suspended

   */
  enum {
  	IRQS_AUTODETECT		= 0x00000001,

  	IRQS_SPURIOUS_DISABLED	= 0x00000002,

  	IRQS_POLL_INPROGRESS	= 0x00000008,

  	IRQS_ONESHOT		= 0x00000020,

  	IRQS_REPLAY		= 0x00000040,
  	IRQS_WAITING		= 0x00000080,

  	IRQS_PENDING		= 0x00000200,

  	IRQS_SUSPENDED		= 0x00000800,

  };

  #include "debug.h"
  #include "settings.h"

  #define irq_data_to_desc(data)	container_of(data, struct irq_desc, irq_data)

  extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
  		unsigned long flags);

  extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
  extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);

  extern int irq_startup(struct irq_desc *desc);
  extern void irq_shutdown(struct irq_desc *desc);

  extern void irq_enable(struct irq_desc *desc);
  extern void irq_disable(struct irq_desc *desc);

  extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
  extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);

  extern void mask_irq(struct irq_desc *desc);
  extern void unmask_irq(struct irq_desc *desc);

  extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);

  irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
  irqreturn_t handle_irq_event(struct irq_desc *desc);

  /* Resending of interrupts :*/
  void check_irq_resend(struct irq_desc *desc, unsigned int irq);

  bool irq_wait_for_poll(struct irq_desc *desc);

  #ifdef CONFIG_PROC_FS

  extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);

  extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);

  extern void register_handler_proc(unsigned int irq, struct irqaction *action);
  extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
  #else

  static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }

  static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }

  static inline void register_handler_proc(unsigned int irq,
  					 struct irqaction *action) { }
  static inline void unregister_handler_proc(unsigned int irq,
  					   struct irqaction *action) { }
  #endif

  extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);

  extern void irq_set_thread_affinity(struct irq_desc *desc);

  /* Inline functions for support of irq chips on slow busses */

  static inline void chip_bus_lock(struct irq_desc *desc)

  {

  	if (unlikely(desc->irq_data.chip->irq_bus_lock))
  		desc->irq_data.chip->irq_bus_lock(&desc->irq_data);

  }

  static inline void chip_bus_sync_unlock(struct irq_desc *desc)

  {

  	if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
  		desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);

  }

  #define _IRQ_DESC_CHECK		(1 << 0)
  #define _IRQ_DESC_PERCPU	(1 << 1)
  
  #define IRQ_GET_DESC_CHECK_GLOBAL	(_IRQ_DESC_CHECK)
  #define IRQ_GET_DESC_CHECK_PERCPU	(_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)

  struct irq_desc *

  __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
  		    unsigned int check);

  void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
  
  static inline struct irq_desc *

  irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)

  {

  	return __irq_get_desc_lock(irq, flags, true, check);

  }
  
  static inline void
  irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
  {
  	__irq_put_desc_unlock(desc, flags, true);
  }
  
  static inline struct irq_desc *

  irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)

  {

  	return __irq_get_desc_lock(irq, flags, false, check);

  }
  
  static inline void
  irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
  {
  	__irq_put_desc_unlock(desc, flags, false);
  }

  /*

   * Manipulation functions for irq_data.state
   */
  static inline void irqd_set_move_pending(struct irq_data *d)
  {
  	d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;

  }
  
  static inline void irqd_clr_move_pending(struct irq_data *d)
  {
  	d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;

  }

  
  static inline void irqd_clear(struct irq_data *d, unsigned int mask)
  {
  	d->state_use_accessors &= ~mask;
  }
  
  static inline void irqd_set(struct irq_data *d, unsigned int mask)
  {
  	d->state_use_accessors |= mask;
  }

  static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
  {
  	return d->state_use_accessors & mask;
  }