m68knommu: general interrupt controller for ColdFire many 52xx parts
[linux-2.6.git] / arch / m68knommu / kernel / irq.c
1 /*
2  * irq.c
3  *
4  * (C) Copyright 2007, Greg Ungerer <gerg@snapgear.com>
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/types.h>
12 #include <linux/init.h>
13 #include <linux/kernel.h>
14 #include <linux/kernel_stat.h>
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <linux/seq_file.h>
18 #include <asm/system.h>
19 #include <asm/traps.h>
20
21 asmlinkage void do_IRQ(int irq, struct pt_regs *regs)
22 {
23         struct pt_regs *oldregs = set_irq_regs(regs);
24
25         irq_enter();
26         generic_handle_irq(irq);
27         irq_exit();
28
29         set_irq_regs(oldregs);
30 }
31
32 #if !defined(CONFIG_M520x) && !defined(CONFIG_M523x) && \
33     !defined(CONFIG_M527x) && !defined(CONFIG_M528x)
34
35 static struct irq_chip m_irq_chip = {
36         .name           = "M68K-INTC",
37         .enable         = enable_vector,
38         .disable        = disable_vector,
39         .ack            = ack_vector,
40 };
41
42 void __init init_IRQ(void)
43 {
44         int irq;
45
46         init_vectors();
47
48         for (irq = 0; (irq < NR_IRQS); irq++) {
49                 irq_desc[irq].status = IRQ_DISABLED;
50                 irq_desc[irq].action = NULL;
51                 irq_desc[irq].depth = 1;
52                 irq_desc[irq].chip = &m_irq_chip;
53         }
54 }
55
56 #endif
57
58 int show_interrupts(struct seq_file *p, void *v)
59 {
60         struct irqaction *ap;
61         int irq = *((loff_t *) v);
62
63         if (irq == 0)
64                 seq_puts(p, "           CPU0\n");
65
66         if (irq < NR_IRQS) {
67                 ap = irq_desc[irq].action;
68                 if (ap) {
69                         seq_printf(p, "%3d: ", irq);
70                         seq_printf(p, "%10u ", kstat_irqs(irq));
71                         seq_printf(p, "%14s  ", irq_desc[irq].chip->name);
72
73                         seq_printf(p, "%s", ap->name);
74                         for (ap = ap->next; ap; ap = ap->next)
75                                 seq_printf(p, ", %s", ap->name);
76                         seq_putc(p, '\n');
77                 }
78         }
79
80         return 0;
81 }
82