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/init.h>
30 #include <linux/seq_file.h>
31 #include <linux/bitops.h>
32 #include <asm/system.h>
35 #include <asm/pgalloc.h>
36 #include <asm/delay.h>
38 #include <linux/irq.h>
40 void ack_bad_irq(unsigned int irq)
42 printk("unexpected IRQ trap at irq %02x\n", irq);
45 #if defined(CONFIG_PROC_FS)
46 int show_interrupts(struct seq_file *p, void *v)
48 int i = *(loff_t *) v, j;
49 struct irqaction * action;
54 for_each_online_cpu(j)
55 seq_printf(p, "CPU%d ",j);
60 spin_lock_irqsave(&irq_desc[i].lock, flags);
61 action = irq_desc[i].action;
64 seq_printf(p, "%3d: ",i);
65 seq_printf(p, "%10u ", kstat_irqs(i));
66 seq_printf(p, " %14s", irq_desc[i].chip->typename);
67 seq_printf(p, " %s", action->name);
69 for (action=action->next; action; action = action->next)
70 seq_printf(p, ", %s", action->name);
73 spin_unlock_irqrestore(&irq_desc[i].lock, flags);
80 * do_NMI handles all Non-Maskable Interrupts.
82 asmlinkage void do_NMI(unsigned long vector_num, struct pt_regs * regs)
84 if (regs->sr & 0x40000000)
85 printk("unexpected NMI trap in system mode\n");
87 printk("unexpected NMI trap in user mode\n");
93 * do_IRQ handles all normal device IRQ's.
95 asmlinkage int do_IRQ(unsigned long vector_num, struct pt_regs * regs)
97 struct pt_regs *old_regs = set_irq_regs(regs);
102 irq = irq_demux(vector_num);
107 printk("unexpected IRQ trap at vector %03lx\n", vector_num);
112 set_irq_regs(old_regs);