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1633 |
jcastillo |
#ifndef _M68K_IRQ_H_
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#define _M68K_IRQ_H_
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extern void disable_irq(unsigned int);
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extern void enable_irq(unsigned int);
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#include <linux/config.h>
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/*
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* This should be the same as the max(NUM_X_SOURCES) for all the
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* different m68k hosts compiled into the kernel.
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* Currently the Atari has 72 and the Amiga 24, but if both are
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* supported in the kernel it is better to make room for 72.
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*/
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#if defined(CONFIG_ATARI)
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#define NR_IRQS 72
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#else
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#define NR_IRQS 24
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#endif
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/*
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* Interrupt source definitions
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* General interrupt sources are the level 1-7.
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* Adding an interrupt service routine for one of these sources
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* results in the addition of that routine to a chain of routines.
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* Each one is called in succession. Each individual interrupt
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* service routine should determine if the device associated with
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* that routine requires service.
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*/
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#define IRQ1 (1) /* level 1 interrupt */
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#define IRQ2 (2) /* level 2 interrupt */
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#define IRQ3 (3) /* level 3 interrupt */
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#define IRQ4 (4) /* level 4 interrupt */
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#define IRQ5 (5) /* level 5 interrupt */
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#define IRQ6 (6) /* level 6 interrupt */
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#define IRQ7 (7) /* level 7 interrupt (non-maskable) */
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/*
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* "Generic" interrupt sources
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*/
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#define IRQ_SCHED_TIMER (8) /* interrupt source for scheduling timer */
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/*
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* Machine specific interrupt sources.
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*
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* Adding an interrupt service routine for a source with this bit
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* set indicates a special machine specific interrupt source.
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* The machine specific files define these sources.
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*/
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#define IRQ_MACHSPEC (0x10000000L)
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#ifndef ISRFUNC_T
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struct pt_regs;
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typedef void (*isrfunc) (int irq, struct pt_regs * regs, void *data);
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#define ISRFUNC_T
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#endif /* ISRFUNC_T */
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/*
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* This structure is used to chain together the ISRs for a particular
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* interrupt source (if it supports chaining).
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*/
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typedef struct isr_node {
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isrfunc isr;
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int pri;
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void *data;
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char *name;
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struct isr_node *next;
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} isr_node_t;
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/* count of spurious interrupts */
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extern volatile unsigned long num_spurious;
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/*
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* This function returns a new isr_node_t
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*/
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extern isr_node_t *new_isr_node(void);
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/*
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* This function is used to add a specific interrupt service routine
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* for the specified interrupt source.
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*
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* If the source is machine specific, it will be passed along to the
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* machine specific routine.
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*
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* "data" is user specified data which will be passed to the isr routine.
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*
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* (isrfunc is defined in linux/config.h)
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*/
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extern int add_isr (unsigned long source, isrfunc isr, int pri, void
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*data, char *name);
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/*
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* This routine will remove an isr for the specified interrupt source.
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*/
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extern int remove_isr (unsigned long source, isrfunc isr, void *data);
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/*
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* This routine will insert an isr_node_t into a chain of nodes, using
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* the priority stored in the node.
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*/
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extern void insert_isr (isr_node_t **listp, isr_node_t *node);
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/*
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* This routine will delete the isr node for isr from a chain of nodes
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*/
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extern void delete_isr (isr_node_t **listp, isrfunc isr, void *data);
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/*
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* This routine may be used to call the isr routines in the passed list.
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*/
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extern void call_isr_list (int irq, isr_node_t *p, struct pt_regs *fp);
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#endif /* _M68K_IRQ_H_ */
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