72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
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/*
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* Copyright (C) 2004-2006 Atmel Corporation
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*
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* Based on arch/i386/kernel/irq.c
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* Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This file contains the code used by various IRQ handling routines:
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* asking for different IRQ's should be done through these routines
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* instead of just grabbing them. Thus setups with different IRQ numbers
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* shouldn't result in any weird surprises, and installing new handlers
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* should be easier.
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*
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* IRQ's are in fact implemented a bit like signal handlers for the kernel.
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* Naturally it's not a 1:1 relation, but there are similarities.
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*/
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/kernel_stat.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/sysdev.h>
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/*
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* 'what should we do if we get a hw irq event on an illegal vector'.
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* each architecture has to answer this themselves.
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*/
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void ack_bad_irq(unsigned int irq)
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{
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printk("unexpected IRQ %u\n", irq);
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}
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#ifdef CONFIG_PROC_FS
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int show_interrupts(struct seq_file *p, void *v)
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{
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int i = *(loff_t *)v, cpu;
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struct irqaction *action;
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unsigned long flags;
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if (i == 0) {
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seq_puts(p, " ");
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for_each_online_cpu(cpu)
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seq_printf(p, "CPU%d ", cpu);
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seq_putc(p, '\n');
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}
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if (i < NR_IRQS) {
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spin_lock_irqsave(&irq_desc[i].lock, flags);
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action = irq_desc[i].action;
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if (!action)
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goto unlock;
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seq_printf(p, "%3d: ", i);
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for_each_online_cpu(cpu)
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seq_printf(p, "%10u ", kstat_cpu(cpu).irqs[i]);
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seq_printf(p, " %s", action->name);
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for (action = action->next; action; action = action->next)
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seq_printf(p, ", %s", action->name);
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seq_putc(p, '\n');
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unlock:
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spin_unlock_irqrestore(&irq_desc[i].lock, flags);
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}
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return 0;
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}
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#endif
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