1/*
2 * linux/arch/m32r/kernel/irq.c
3 *
4 *  Copyright (c) 2003, 2004  Hitoshi Yamamoto
5 *  Copyright (c) 2004  Hirokazu Takata <takata at linux-m32r.org>
6 */
7
8/*
9 *	linux/arch/i386/kernel/irq.c
10 *
11 *	Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
12 *
13 * This file contains the lowest level m32r-specific interrupt
14 * entry and irq statistics code. All the remaining irq logic is
15 * done by the generic kernel/irq/ code and in the
16 * m32r-specific irq controller code.
17 */
18
19#include <linux/kernel_stat.h>
20#include <linux/interrupt.h>
21#include <linux/seq_file.h>
22#include <linux/module.h>
23#include <asm/uaccess.h>
24
25atomic_t irq_err_count;
26atomic_t irq_mis_count;
27
28/*
29 * Generic, controller-independent functions:
30 */
31
32int show_interrupts(struct seq_file *p, void *v)
33{
34	int i = *(loff_t *) v, j;
35	struct irqaction * action;
36	unsigned long flags;
37
38	if (i == 0) {
39		seq_printf(p, "           ");
40		for_each_online_cpu(j)
41			seq_printf(p, "CPU%d       ",j);
42		seq_putc(p, '\n');
43	}
44
45	if (i < NR_IRQS) {
46		spin_lock_irqsave(&irq_desc[i].lock, flags);
47		action = irq_desc[i].action;
48		if (!action)
49			goto skip;
50		seq_printf(p, "%3d: ",i);
51#ifndef CONFIG_SMP
52		seq_printf(p, "%10u ", kstat_irqs(i));
53#else
54		for_each_online_cpu(j)
55			seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
56#endif
57		seq_printf(p, " %14s", irq_desc[i].chip->typename);
58		seq_printf(p, "  %s", action->name);
59
60		for (action=action->next; action; action = action->next)
61			seq_printf(p, ", %s", action->name);
62
63		seq_putc(p, '\n');
64skip:
65		spin_unlock_irqrestore(&irq_desc[i].lock, flags);
66	} else if (i == NR_IRQS) {
67		seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
68		seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
69	}
70	return 0;
71}
72
73/*
74 * do_IRQ handles all normal device IRQ's (the special
75 * SMP cross-CPU interrupts have their own specific
76 * handlers).
77 */
78asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs)
79{
80	struct pt_regs *old_regs;
81	old_regs = set_irq_regs(regs);
82	irq_enter();
83
84#ifdef CONFIG_DEBUG_STACKOVERFLOW
85#endif
86	__do_IRQ(irq);
87	irq_exit();
88	set_irq_regs(old_regs);
89
90	return 1;
91}
92