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Diffstat (limited to 'include/asm-m68knommu/irq.h')
| -rw-r--r-- | include/asm-m68knommu/irq.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/include/asm-m68knommu/irq.h b/include/asm-m68knommu/irq.h new file mode 100644 index 000000000000..208ccd969e4b --- /dev/null +++ b/include/asm-m68knommu/irq.h @@ -0,0 +1,128 @@ +#ifndef _M68K_IRQ_H_ +#define _M68K_IRQ_H_ + +#include <linux/config.h> +#include <linux/interrupt.h> +#include <asm/ptrace.h> + +#ifdef CONFIG_COLDFIRE +/* + * On the ColdFire we keep track of all vectors. That way drivers + * can register whatever vector number they wish, and we can deal + * with it. + */ +#define SYS_IRQS 256 +#define NR_IRQS SYS_IRQS + +#else + +/* + * # of m68k interrupts + */ +#define SYS_IRQS 8 +#define NR_IRQS (24+SYS_IRQS) + +#endif /* CONFIG_COLDFIRE */ + +/* + * 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) */ + +/* + * 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 (*mach_enable_irq)(unsigned int); +extern void (*mach_disable_irq)(unsigned int); + +/* + * various flags for request_irq() - the Amiga now uses the standard + * mechanism like all other architectures - SA_INTERRUPT and SA_SHIRQ + * are your friends. + */ +#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 */ + +#ifdef CONFIG_M68360 + +#define CPM_INTERRUPT IRQ4 + +/* see MC68360 User's Manual, p. 7-377 */ +#define CPM_VECTOR_BASE 0x04 /* 3 MSbits of CPM vector */ + +#endif /* CONFIG_M68360 */ + +/* + * 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); + +/* + * Some drivers want these entry points + */ +#define enable_irq(x) (mach_enable_irq ? (*mach_enable_irq)(x) : 0) +#define disable_irq(x) (mach_disable_irq ? (*mach_disable_irq)(x) : 0) + +#define enable_irq_nosync(x) enable_irq(x) +#define disable_irq_nosync(x) disable_irq(x) + +struct irqaction; +struct pt_regs; +int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *); + +#endif /* _M68K_IRQ_H_ */ |