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| /* 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> |
| /* |
| * 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) |
| |
| extern int early_irq_init(void); |
| extern int arch_probe_nr_irqs(void); |
| extern int arch_early_irq_init(void); |
| |
| #endif |