[PATCH] m32r pt_regs fixes
[linux-2.6.git] / arch / m32r / kernel / irq.c
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
25 atomic_t irq_err_count;
26 atomic_t irq_mis_count;
27
28 /*
29  * Generic, controller-independent functions:
30  */
31
32 int 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');
64 skip:
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  */
78 asmlinkage 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         /* FIXME M32R */
86 #endif
87         __do_IRQ(irq);
88         irq_exit();
89         set_irq_regs(old_regs);
90
91         return 1;
92 }