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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | #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) #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); 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() */ #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 */ /* * 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_ */ |