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 ?÷     /* SPDX-License-Identifier: GPL-2.0 */
/* interrupt.h */
#ifndef _LINUX_INTERRUPT_H
#define _LINUX_INTERRUPT_H

#include <linux/kernel.h>
#include <linux/bitops.h>
#include <linux/cpumask.h>
#include <linux/irqreturn.h>
#include <linux/irqnr.h>
#include <linux/hardirq.h>
#include <linux/irqflags.h>
#include <linux/hrtimer.h>
#include <linux/kref.h>
#include <linux/workqueue.h>
#include <linux/jump_label.h>

#include <linux/atomic.h>
#include <asm/ptrace.h>
#include <asm/irq.h>
#include <asm/sections.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 a 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.rst
 * 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.
 * IRQF_NO_AUTOEN - Don't enable IRQ or NMI automatically when users request it.
 *                Users will enable it explicitly by enable_irq() or enable_nmi()
 *                later.
 * IRQF_NO_DEBUG - Exclude from runnaway detection for IPI and similar handlers,
 *		   depends on IRQF_PERCPU.
 * IRQF_COND_ONESHOT - Agree to do IRQF_ONESHOT if already set for a shared
 *                 interrupt.
 */
#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_NO_AUTOEN		0x00080000
#define IRQF_NO_DEBUG		0x00100000
#define IRQF_COND_ONESHOT	0x00200000

#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,
};

typedef irqreturn_t (*irq_handler_t)(int,