98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
|
#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 */
|