irq.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- #ifndef __irq_h
- #define __irq_h
- /*
- * Please do not include this file in generic code. There is currently
- * no requirement for any architecture to implement anything held
- * within this file.
- *
- * Thanks. --rmk
- */
- #include <linux/config.h>
- #if !defined(CONFIG_ARCH_S390)
- #include <linux/cache.h>
- #include <linux/spinlock.h>
- #include <asm/irq.h>
- #include <asm/ptrace.h>
- /*
- * IRQ line status.
- */
- #define IRQ_INPROGRESS 1 /* IRQ handler active - do not enter! */
- #define IRQ_DISABLED 2 /* IRQ disabled - do not enter! */
- #define IRQ_PENDING 4 /* IRQ pending - replay on enable */
- #define IRQ_REPLAY 8 /* IRQ has been replayed but not acked yet */
- #define IRQ_AUTODETECT 16 /* IRQ is being autodetected */
- #define IRQ_WAITING 32 /* IRQ not yet seen - for autodetection */
- #define IRQ_LEVEL 64 /* IRQ level triggered */
- #define IRQ_MASKED 128 /* IRQ masked - shouldn't be seen again */
- #define IRQ_PER_CPU 256 /* IRQ is per CPU */
- /*
- * Interrupt controller descriptor. This is all we need
- * to describe about the low-level hardware.
- */
- struct hw_interrupt_type {
- const char * typename;
- unsigned int (*startup)(unsigned int irq);
- void (*shutdown)(unsigned int irq);
- void (*enable)(unsigned int irq);
- void (*disable)(unsigned int irq);
- void (*ack)(unsigned int irq);
- void (*end)(unsigned int irq);
- void (*set_affinity)(unsigned int irq, unsigned long mask);
- };
- typedef struct hw_interrupt_type hw_irq_controller;
- /*
- * This is the "IRQ descriptor", which contains various information
- * about the irq, including what kind of hardware handling it has,
- * whether it is disabled etc etc.
- *
- * Pad this out to 32 bytes for cache and indexing reasons.
- */
- typedef struct {
- unsigned int status; /* IRQ status */
- hw_irq_controller *handler;
- struct irqaction *action; /* IRQ action list */
- unsigned int depth; /* nested irq disables */
- spinlock_t lock;
- } ____cacheline_aligned irq_desc_t;
- extern irq_desc_t irq_desc [NR_IRQS];
- #include <asm/hw_irq.h> /* the arch dependent stuff */
- extern int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
- extern int setup_irq(unsigned int , struct irqaction * );
- extern hw_irq_controller no_irq_type; /* needed in every arch ? */
- extern void no_action(int cpl, void *dev_id, struct pt_regs *regs);
- #endif
- #endif /* __irq_h */