irq.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:3k
- #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 CONFIG_AMIGA
- #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_ */