#ifndef _M68K_IRQ_H_ #define _M68K_IRQ_H_ #include <linux/config.h> #include <linux/interrupt.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_canonicalize(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 enable_irq_nosync enable_irq struct pt_regs; extern int cpu_request_irq(unsigned int, irqreturn_t (*)(int, void *, struct pt_regs *), unsigned long, const char *, void *); extern void cpu_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 { irqreturn_t (*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 { irqreturn_t (*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); struct irqaction; struct pt_regs; int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *); #endif /* _M68K_IRQ_H_ */