1. 根目录:
2. arch
3. arm64
4. include
5. asm
6. hardirq.h

/*
 * Copyright (C) 2012 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_HARDIRQ_H
#define __ASM_HARDIRQ_H

#include <linux/cache.h>
#include <linux/threads.h>
#include <asm/irq.h>

#define NR_IPI	4

typedef struct {
	unsigned int __softirq_pending;
#ifdef CONFIG_SMP
	unsigned int ipi_irqs[NR_IPI];
#endif
} ____cacheline_aligned irq_cpustat_t;

#include <linux/irq_cpustat.h>	/* Standard mappings for irq_cpustat_t above */

#define __inc_irq_stat(cpu, member)	__IRQ_STAT(cpu, member)++
#define __get_irq_stat(cpu, member)	__IRQ_STAT(cpu, member)

#ifdef CONFIG_SMP
u64 smp_irq_stat_cpu(unsigned int cpu);
#define arch_irq_stat_cpu	smp_irq_stat_cpu
#endif

#define __ARCH_IRQ_EXIT_IRQS_DISABLED	1

static inline void ack_bad_irq(unsigned int irq)
{
	extern unsigned long irq_err_count;
	irq_err_count++;
}

extern void handle_IRQ(unsigned int, struct pt_regs *);

/*
 * No arch-specific IRQ flags.
 */
#define set_irq_flags(irq, flags)

#endif /* __ASM_HARDIRQ_H */