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101 lines
3.0 KiB
101 lines
3.0 KiB
#ifndef __irq_h
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#define __irq_h
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/*
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* Please do not include this file in generic code. There is currently
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* no requirement for any architecture to implement anything held
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* within this file.
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*
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* Thanks. --rmk
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*/
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#include <linux/config.h>
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#if !defined(CONFIG_ARCH_S390)
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#include <linux/linkage.h>
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#include <linux/cache.h>
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#include <linux/spinlock.h>
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#include <linux/cpumask.h>
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#include <asm/irq.h>
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#include <asm/ptrace.h>
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/*
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* IRQ line status.
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*/
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#define IRQ_INPROGRESS 1 /* IRQ handler active - do not enter! */
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#define IRQ_DISABLED 2 /* IRQ disabled - do not enter! */
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#define IRQ_PENDING 4 /* IRQ pending - replay on enable */
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#define IRQ_REPLAY 8 /* IRQ has been replayed but not acked yet */
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#define IRQ_AUTODETECT 16 /* IRQ is being autodetected */
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#define IRQ_WAITING 32 /* IRQ not yet seen - for autodetection */
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#define IRQ_LEVEL 64 /* IRQ level triggered */
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#define IRQ_MASKED 128 /* IRQ masked - shouldn't be seen again */
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#define IRQ_PER_CPU 256 /* IRQ is per CPU */
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/*
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* Interrupt controller descriptor. This is all we need
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* to describe about the low-level hardware.
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*/
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struct hw_interrupt_type {
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const char * typename;
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unsigned int (*startup)(unsigned int irq);
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void (*shutdown)(unsigned int irq);
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void (*enable)(unsigned int irq);
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void (*disable)(unsigned int irq);
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void (*ack)(unsigned int irq);
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void (*end)(unsigned int irq);
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void (*set_affinity)(unsigned int irq, cpumask_t dest);
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/* Currently used only by UML, might disappear one day.*/
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#ifdef CONFIG_IRQ_RELEASE_METHOD
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void (*release)(unsigned int irq, void *dev_id);
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#endif
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};
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typedef struct hw_interrupt_type hw_irq_controller;
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/*
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* This is the "IRQ descriptor", which contains various information
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* about the irq, including what kind of hardware handling it has,
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* whether it is disabled etc etc.
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*
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* Pad this out to 32 bytes for cache and indexing reasons.
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*/
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typedef struct irq_desc {
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hw_irq_controller *handler;
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void *handler_data;
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struct irqaction *action; /* IRQ action list */
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unsigned int status; /* IRQ status */
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unsigned int depth; /* nested irq disables */
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unsigned int irq_count; /* For detecting broken interrupts */
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unsigned int irqs_unhandled;
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spinlock_t lock;
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} ____cacheline_aligned irq_desc_t;
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extern irq_desc_t irq_desc [NR_IRQS];
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#include <asm/hw_irq.h> /* the arch dependent stuff */
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extern int setup_irq(unsigned int irq, struct irqaction * new);
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#ifdef CONFIG_GENERIC_HARDIRQS
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extern cpumask_t irq_affinity[NR_IRQS];
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extern int no_irq_affinity;
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extern int noirqdebug_setup(char *str);
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extern fastcall int handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
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struct irqaction *action);
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extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
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extern void note_interrupt(unsigned int irq, irq_desc_t *desc,
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int action_ret, struct pt_regs *regs);
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extern int can_request_irq(unsigned int irq, unsigned long irqflags);
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extern void init_irq_proc(void);
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#endif
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extern hw_irq_controller no_irq_type; /* needed in every arch ? */
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#endif
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#endif /* __irq_h */
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