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 void ack_bad_irq(unsigned int irq)
  33 {
  34         printk(KERN_ERR "IRQ: unexpected irq=%d\n", irq);
  35 }
  36
  37 static struct irq_chip m_irq_chip = {
  38         .name           = "M68K-INTC",
  39         .enable         = enable_vector,
  40         .disable        = disable_vector,
  41         .ack            = ack_vector,
  42 };
  43
  44 void __init init_IRQ(void)
  45 {
  46         int irq;
  47
  48         init_vectors();
  49
  50         for (irq = 0; (irq < NR_IRQS); irq++) {
  51                 irq_desc[irq].status = IRQ_DISABLED;
  52                 irq_desc[irq].action = NULL;
  53                 irq_desc[irq].depth = 1;
  54                 irq_desc[irq].chip = &m_irq_chip;
  55         }
  56 }
  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