irq.c

 1/*
 2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
 3 * Copyright (C) 2007-2009 PetaLogix
 4 * Copyright (C) 2006 Atmark Techno, Inc.
 5 *
 6 * This file is subject to the terms and conditions of the GNU General Public
 7 * License. See the file "COPYING" in the main directory of this archive
 8 * for more details.
 9 */
10
11#include <linux/init.h>
12#include <linux/ftrace.h>
13#include <linux/kernel.h>
14#include <linux/hardirq.h>
15#include <linux/interrupt.h>
16#include <linux/irqflags.h>
17#include <linux/seq_file.h>
18#include <linux/kernel_stat.h>
19#include <linux/irq.h>
20#include <linux/irqchip.h>
21#include <linux/of_irq.h>
22
23void __irq_entry do_IRQ(struct pt_regs *regs)
24{
25	struct pt_regs *old_regs = set_irq_regs(regs);
26	trace_hardirqs_off();
27
28	irq_enter();
29	handle_arch_irq(regs);
30	irq_exit();
31	set_irq_regs(old_regs);
32	trace_hardirqs_on();
33}
34
35void __init init_IRQ(void)
36{
37	/* process the entire interrupt tree in one go */
38	irqchip_init();
39}