84 lines
3.3 KiB
C
84 lines
3.3 KiB
C
/* interrupt.h */
|
|
#ifndef _LINUX_INTERRUPT_H
|
|
#define _LINUX_INTERRUPT_H
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/irqreturn.h>
|
|
#include <linux/kref.h>
|
|
#include <linux/atomic.h>
|
|
/*
|
|
* These correspond to the IORESOURCE_IRQ_* defines in
|
|
* linux/ioport.h to select the interrupt line behaviour. When
|
|
* requesting an interrupt without specifying a IRQF_TRIGGER, the
|
|
* setting should be assumed to be "as already configured", which
|
|
* may be as per machine or firmware initialisation.
|
|
*/
|
|
#define IRQF_TRIGGER_NONE 0x00000000
|
|
#define IRQF_TRIGGER_RISING 0x00000001
|
|
#define IRQF_TRIGGER_FALLING 0x00000002
|
|
#define IRQF_TRIGGER_HIGH 0x00000004
|
|
#define IRQF_TRIGGER_LOW 0x00000008
|
|
#define IRQF_TRIGGER_MASK (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW | \
|
|
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)
|
|
#define IRQF_TRIGGER_PROBE 0x00000010
|
|
|
|
/*
|
|
* These flags used only by the kernel as part of the
|
|
* irq handling routines.
|
|
*
|
|
* IRQF_SHARED - allow sharing the irq among several devices
|
|
* IRQF_PROBE_SHARED - set by callers when they expect sharing mismatches to occur
|
|
* IRQF_TIMER - Flag to mark this interrupt as timer interrupt
|
|
* IRQF_PERCPU - Interrupt is per cpu
|
|
* IRQF_NOBALANCING - Flag to exclude this interrupt from irq balancing
|
|
* IRQF_IRQPOLL - Interrupt is used for polling (only the interrupt that is
|
|
* registered first in an shared interrupt is considered for
|
|
* performance reasons)
|
|
* IRQF_ONESHOT - Interrupt is not reenabled after the hardirq handler finished.
|
|
* Used by threaded interrupts which need to keep the
|
|
* irq line disabled until the threaded handler has been run.
|
|
* IRQF_NO_SUSPEND - Do not disable this IRQ during suspend. Does not guarantee
|
|
* that this interrupt will wake the system from a suspended
|
|
* state. See Documentation/power/suspend-and-interrupts.txt
|
|
* IRQF_FORCE_RESUME - Force enable it on resume even if IRQF_NO_SUSPEND is set
|
|
* IRQF_NO_THREAD - Interrupt cannot be threaded
|
|
* IRQF_EARLY_RESUME - Resume IRQ early during syscore instead of at device
|
|
* resume time.
|
|
* IRQF_COND_SUSPEND - If the IRQ is shared with a NO_SUSPEND user, execute this
|
|
* interrupt handler after suspending interrupts. For system
|
|
* wakeup devices users need to implement wakeup detection in
|
|
* their interrupt handlers.
|
|
*/
|
|
#define IRQF_SHARED 0x00000080
|
|
#define IRQF_PROBE_SHARED 0x00000100
|
|
#define __IRQF_TIMER 0x00000200
|
|
#define IRQF_PERCPU 0x00000400
|
|
#define IRQF_NOBALANCING 0x00000800
|
|
#define IRQF_IRQPOLL 0x00001000
|
|
#define IRQF_ONESHOT 0x00002000
|
|
#define IRQF_NO_SUSPEND 0x00004000
|
|
#define IRQF_FORCE_RESUME 0x00008000
|
|
#define IRQF_NO_THREAD 0x00010000
|
|
#define IRQF_EARLY_RESUME 0x00020000
|
|
#define IRQF_COND_SUSPEND 0x00040000
|
|
|
|
#define IRQF_TIMER (__IRQF_TIMER | IRQF_NO_SUSPEND | IRQF_NO_THREAD)
|
|
|
|
/*
|
|
* These values can be returned by request_any_context_irq() and
|
|
* describe the context the interrupt will be run in.
|
|
*
|
|
* IRQC_IS_HARDIRQ - interrupt runs in hardirq context
|
|
* IRQC_IS_NESTED - interrupt runs in a nested threaded context
|
|
*/
|
|
enum {
|
|
IRQC_IS_HARDIRQ = 0,
|
|
IRQC_IS_NESTED,
|
|
};
|
|
extern int early_irq_init(void);
|
|
extern int arch_probe_nr_irqs(void);
|
|
extern int arch_early_irq_init(void);
|
|
|
|
#endif
|