#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/linkage.h> #include <linux/cache.h> #include <linux/spinlock.h> #include <linux/cpumask.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, cpumask_t dest); }; 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 irq_desc { hw_irq_controller *handler; void *handler_data; struct irqaction *action; /* IRQ action list */ unsigned int status; /* IRQ status */ unsigned int depth; /* nested irq disables */ unsigned int irq_count; /* For detecting broken interrupts */ unsigned int irqs_unhandled; 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 setup_irq(unsigned int irq, struct irqaction * new); #ifdef CONFIG_GENERIC_HARDIRQS extern cpumask_t irq_affinity[NR_IRQS]; extern int no_irq_affinity; extern int noirqdebug_setup(char *str); extern fastcall int handle_IRQ_event(unsigned int irq, struct pt_regs *regs, struct irqaction *action); extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs); extern void note_interrupt(unsigned int irq, irq_desc_t *desc, int action_ret); extern void report_bad_irq(unsigned int irq, irq_desc_t *desc, int action_ret); extern int can_request_irq(unsigned int irq, unsigned long irqflags); extern void init_irq_proc(void); #endif extern hw_irq_controller no_irq_type; /* needed in every arch ? */ #endif #endif /* __irq_h */