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117 lines
2.5 KiB
117 lines
2.5 KiB
20 years ago
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* arch/sh64/kernel/irq.c
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*
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* Copyright (C) 2000, 2001 Paolo Alberelli
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* Copyright (C) 2003 Paul Mundt
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*
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*/
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/*
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* IRQs 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/config.h>
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#include <linux/errno.h>
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#include <linux/kernel_stat.h>
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#include <linux/signal.h>
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#include <linux/rwsem.h>
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#include <linux/sched.h>
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#include <linux/ioport.h>
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#include <linux/interrupt.h>
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#include <linux/timex.h>
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#include <linux/slab.h>
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#include <linux/random.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/init.h>
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#include <linux/seq_file.h>
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#include <linux/bitops.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/smp.h>
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#include <asm/pgalloc.h>
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#include <asm/delay.h>
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#include <asm/irq.h>
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#include <linux/irq.h>
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void ack_bad_irq(unsigned int irq)
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{
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printk("unexpected IRQ trap at irq %02x\n", irq);
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}
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#if defined(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, j;
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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 (j=0; j<NR_CPUS; j++)
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if (cpu_online(j))
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seq_printf(p, "CPU%d ",j);
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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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seq_printf(p, "%10u ", kstat_irqs(i));
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seq_printf(p, " %14s", irq_desc[i].handler->typename);
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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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/*
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* do_NMI handles all Non-Maskable Interrupts.
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*/
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asmlinkage void do_NMI(unsigned long vector_num, struct pt_regs * regs)
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{
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if (regs->sr & 0x40000000)
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printk("unexpected NMI trap in system mode\n");
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else
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printk("unexpected NMI trap in user mode\n");
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/* No statistics */
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}
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/*
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* do_IRQ handles all normal device IRQ's.
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*/
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asmlinkage int do_IRQ(unsigned long vector_num, struct pt_regs * regs)
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{
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int irq;
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irq_enter();
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irq = irq_demux(vector_num);
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if (irq >= 0) {
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__do_IRQ(irq, regs);
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} else {
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printk("unexpected IRQ trap at vector %03lx\n", vector_num);
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}
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irq_exit();
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return 1;
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}
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