#ifndef __OF_IRQ_H
  #define __OF_IRQ_H
  
  #if defined(CONFIG_OF)
  struct of_irq;
  #include <linux/types.h>

  #include <linux/errno.h>

  #include <linux/irq.h>

  #include <linux/ioport.h>

  #include <linux/of.h>
  
  /*
   * irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC
   * implements it differently.  However, the prototype is the same for all,
   * so declare it here regardless of the CONFIG_OF_IRQ setting.
   */
  extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
  
  #if defined(CONFIG_OF_IRQ)
  /**
   * of_irq - container for device_node/irq_specifier pair for an irq controller
   * @controller: pointer to interrupt controller device tree node
   * @size: size of interrupt specifier
   * @specifier: array of cells @size long specifing the specific interrupt
   *
   * This structure is returned when an interrupt is mapped. The controller
   * field needs to be put() after use
   */
  #define OF_MAX_IRQ_SPEC		4 /* We handle specifiers of at most 4 cells */
  struct of_irq {
  	struct device_node *controller; /* Interrupt controller node */
  	u32 size; /* Specifier size */
  	u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
  };

  typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);

  /*
   * Workarounds only applied to 32bit powermac machines
   */
  #define OF_IMAP_OLDWORLD_MAC	0x00000001
  #define OF_IMAP_NO_PHANDLE	0x00000002
  
  #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
  extern unsigned int of_irq_workarounds;
  extern struct device_node *of_irq_dflt_pic;
  extern int of_irq_map_oldworld(struct device_node *device, int index,
  			       struct of_irq *out_irq);
  #else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  #define of_irq_workarounds (0)
  #define of_irq_dflt_pic (NULL)
  static inline int of_irq_map_oldworld(struct device_node *device, int index,
  				      struct of_irq *out_irq)
  {
  	return -EINVAL;
  }
  #endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  
  
  extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
  			  u32 ointsize, const u32 *addr,
  			  struct of_irq *out_irq);

  extern int of_irq_map_one(struct device_node *device, int index,
  			  struct of_irq *out_irq);
  extern unsigned int irq_create_of_mapping(struct device_node *controller,
  					  const u32 *intspec,
  					  unsigned int intsize);

  #ifdef CONFIG_IRQ_DOMAIN
  extern void irq_dispose_mapping(unsigned int irq);
  #endif

  extern int of_irq_to_resource(struct device_node *dev, int index,
  			      struct resource *r);

  extern int of_irq_count(struct device_node *dev);
  extern int of_irq_to_resource_table(struct device_node *dev,
  		struct resource *res, int nr_irqs);

  extern struct device_node *of_irq_find_parent(struct device_node *child);

  extern void of_irq_init(const struct of_device_id *matches);

  #endif /* CONFIG_OF_IRQ */
  #endif /* CONFIG_OF */
  #endif /* __OF_IRQ_H */