中断处理标志irqflags

/*linux-2.6.29/include/linux/interrupt.h*/

29 #define IRQF_TRIGGER_NONE 0x00000000

30 #define IRQF_TRIGGER_RISING 0x00000001 //上升沿触发中断

31 #define IRQF_TRIGGER_FALLING 0x00000002 //下降沿触发中断

32 #define IRQF_TRIGGER_HIGH 0x00000004 //高电平触发中断

33 #define IRQF_TRIGGER_LOW 0x00000008 //低电平触发中断

34 #define IRQF_TRIGGER_MASK (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW | \

35 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)

36 #define IRQF_TRIGGER_PROBE 0x00000010

/* * 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_DISABLED - keep irqs disabled when calling the action handler

 * IRQF_SAMPLE_RANDOM - irq is used to feed the random generator

 * 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. */

#define IRQF_DISABLED 0x00000020

#define IRQF_SAMPLE_RANDOM 0x00000040

#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