2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * arch/sh64/kernel/irq.c
8 * Copyright (C) 2000, 2001 Paolo Alberelli
9 * Copyright (C) 2003 Paul Mundt
14 * IRQs are in fact implemented a bit like signal handlers for the kernel.
15 * Naturally it's not a 1:1 relation, but there are similarities.
18 #include <linux/errno.h>
19 #include <linux/kernel_stat.h>
20 #include <linux/signal.h>
21 #include <linux/rwsem.h>
22 #include <linux/sched.h>
23 #include <linux/ioport.h>
24 #include <linux/interrupt.h>
25 #include <linux/timex.h>
26 #include <linux/slab.h>
27 #include <linux/random.h>
28 #include <linux/smp.h>
29 #include <linux/smp_lock.h>
30 #include <linux/init.h>
31 #include <linux/seq_file.h>
32 #include <linux/bitops.h>
33 #include <asm/system.h>
36 #include <asm/pgalloc.h>
37 #include <asm/delay.h>
39 #include <linux/irq.h>
41 void ack_bad_irq(unsigned int irq)
43 printk("unexpected IRQ trap at irq %02x\n", irq);
46 #if defined(CONFIG_PROC_FS)
47 int show_interrupts(struct seq_file *p, void *v)
49 int i = *(loff_t *) v, j;
50 struct irqaction * action;
55 for_each_online_cpu(j)
56 seq_printf(p, "CPU%d ",j);
61 spin_lock_irqsave(&irq_desc[i].lock, flags);
62 action = irq_desc[i].action;
65 seq_printf(p, "%3d: ",i);
66 seq_printf(p, "%10u ", kstat_irqs(i));
67 seq_printf(p, " %14s", irq_desc[i].chip->typename);
68 seq_printf(p, " %s", action->name);
70 for (action=action->next; action; action = action->next)
71 seq_printf(p, ", %s", action->name);
74 spin_unlock_irqrestore(&irq_desc[i].lock, flags);
81 * do_NMI handles all Non-Maskable Interrupts.
83 asmlinkage void do_NMI(unsigned long vector_num, struct pt_regs * regs)
85 if (regs->sr & 0x40000000)
86 printk("unexpected NMI trap in system mode\n");
88 printk("unexpected NMI trap in user mode\n");
94 * do_IRQ handles all normal device IRQ's.
96 asmlinkage int do_IRQ(unsigned long vector_num, struct pt_regs * regs)
102 irq = irq_demux(vector_num);
107 printk("unexpected IRQ trap at vector %03lx\n", vector_num);