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#ifndef _M68K_IRQ_H_

#define _M68K_IRQ_H_

#include <linux/config.h>

/*

 * # of m68k interrupts

 */

#define SYS_IRQS 8

/*

 * 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_ATARI) || defined(CONFIG_MAC)

#define NR_IRQS (72+SYS_IRQS)

#else

#define NR_IRQS (24+SYS_IRQS)

#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 IRQ1            (1)     /* level 1 interrupt */

#define IRQ2            (2)     /* level 2 interrupt */

#define IRQ3            (3)     /* level 3 interrupt */

#define IRQ4            (4)     /* level 4 interrupt */

#define IRQ5            (5)     /* level 5 interrupt */

#define IRQ6            (6)     /* level 6 interrupt */

#define IRQ7            (7)     /* level 7 interrupt (non-maskable) */

/*

 * "Generic" interrupt sources

 */

#define IRQ_SCHED_TIMER (8)    /* interrupt source for scheduling timer */

static __inline__ int irq_cannonicalize(int irq)

{

        return irq;

}

/*

 * Machine specific interrupt sources.

 *

 * Adding an interrupt service routine for a source with this bit

 * set indicates a special machine specific interrupt source.

 * The machine specific files define these sources.

 *

 * The IRQ_MACHSPEC bit is now gone - the only thing it did was to

 * introduce unnecessary overhead.

 *

 * All interrupt handling is actually machine specific so it is better

 * to use function pointers, as used by the Sparc port, and select the

 * interrupt handling functions when initializing the kernel. This way

 * we save some unnecessary overhead at run-time.

 *                                                      01/11/97 - Jes

 */

extern void (*enable_irq)(unsigned int);

extern void (*disable_irq)(unsigned int);

#define disable_irq_nosync      disable_irq

#define enable_irq_nosync       enable_irq

extern int sys_request_irq(unsigned int,

        void (*)(int, void *, struct pt_regs *),

        unsigned long, const char *, void *);

extern void sys_free_irq(unsigned int, void *);

/*

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

 * mechanism like all other architectures - SA_INTERRUPT and SA_SHIRQ

 * 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 {

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

        unsigned long   flags;

        void            *dev_id;

        const char      *devname;

        struct irq_node *next;

} irq_node_t;

/*

 * This structure has only 4 elements for speed reasons

 */

typedef struct irq_handler {

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

        unsigned long   flags;

        void            *dev_id;

        const char      *devname;

} irq_handler_t;

/* count of spurious interrupts */

extern volatile unsigned int num_spurious;

/*

 * This function returns a new irq_node_t

 */

extern irq_node_t *new_irq_node(void);

#endif /* _M68K_IRQ_H_ */