#ifndef _M68K_IRQ_H_
  #define _M68K_IRQ_H_

  #include <linux/linkage.h>

  #include <linux/hardirq.h>
  #include <linux/spinlock_types.h>

  
  /*

   * This should be the same as the max(NUM_X_SOURCES) for all the
   * different m68k hosts compiled into the kernel.
   * Currently the Atari has 72 and the Amiga 24, but if both are
   * supported in the kernel it is better to make room for 72.
   */

  #if defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
  #define NR_IRQS 200
  #elif defined(CONFIG_ATARI) || defined(CONFIG_MAC)
  #define NR_IRQS 72
  #elif defined(CONFIG_Q40)
  #define NR_IRQS	43
  #elif defined(CONFIG_AMIGA)
  #define NR_IRQS	32
  #elif defined(CONFIG_APOLLO)
  #define NR_IRQS	24
  #elif defined(CONFIG_HP300)
  #define NR_IRQS	8

  #else

  #error unknown nr of irqs

  #endif
  
  /*

   * The hardirq mask has to be large enough to have
   * space for potentially all IRQ sources in the system
   * nesting on a single CPU:
   */
  #if (1 << HARDIRQ_BITS) < NR_IRQS
  # error HARDIRQ_BITS is too low!
  #endif
  
  /*

   * Interrupt source definitions
   * General interrupt sources are the level 1-7.
   * Adding an interrupt service routine for one of these sources
   * results in the addition of that routine to a chain of routines.
   * Each one is called in succession.  Each individual interrupt
   * service routine should determine if the device associated with
   * that routine requires service.
   */

  #define IRQ_SPURIOUS	0

  #define IRQ_AUTO_1	1	/* level 1 interrupt */
  #define IRQ_AUTO_2	2	/* level 2 interrupt */
  #define IRQ_AUTO_3	3	/* level 3 interrupt */
  #define IRQ_AUTO_4	4	/* level 4 interrupt */
  #define IRQ_AUTO_5	5	/* level 5 interrupt */
  #define IRQ_AUTO_6	6	/* level 6 interrupt */
  #define IRQ_AUTO_7	7	/* level 7 interrupt (non-maskable) */

  #define IRQ_USER	8

  extern unsigned int irq_canonicalize(unsigned int irq);

  
  struct pt_regs;

  /*
   * various flags for request_irq() - the Amiga now uses the standard

   * mechanism like all other architectures - IRQF_DISABLED and
   * IRQF_SHARED are your friends.

   */
  #ifndef MACH_AMIGA_ONLY
  #define IRQ_FLG_LOCK	(0x0001)	/* handler is not replaceable	*/
  #define IRQ_FLG_REPLACE	(0x0002)	/* replace existing handler	*/
  #define IRQ_FLG_FAST	(0x0004)
  #define IRQ_FLG_SLOW	(0x0008)
  #define IRQ_FLG_STD	(0x8000)	/* internally used		*/
  #endif
  
  /*
   * This structure is used to chain together the ISRs for a particular
   * interrupt source (if it supports chaining).
   */
  typedef struct irq_node {

  	int		(*handler)(int, void *);

  	void		*dev_id;

  	struct irq_node *next;

  	unsigned long	flags;
  	const char	*devname;

  } irq_node_t;
  
  /*
   * This structure has only 4 elements for speed reasons
   */

  struct irq_handler {
  	int		(*handler)(int, void *);

  	unsigned long	flags;
  	void		*dev_id;
  	const char	*devname;

  };

  struct irq_controller {
  	const char *name;
  	spinlock_t lock;
  	int (*startup)(unsigned int irq);
  	void (*shutdown)(unsigned int irq);
  	void (*enable)(unsigned int irq);
  	void (*disable)(unsigned int irq);
  };
  
  extern int m68k_irq_startup(unsigned int);
  extern void m68k_irq_shutdown(unsigned int);

  /*
   * This function returns a new irq_node_t
   */
  extern irq_node_t *new_irq_node(void);

  extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *));
  extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
  				      void (*handler)(unsigned int, struct pt_regs *));
  extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int);

  asmlinkage void m68k_handle_int(unsigned int);
  asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *);

  #endif /* _M68K_IRQ_H_ */