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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* arch/sh64/kernel/irq.c
*
* Copyright (C) 2000, 2001 Paolo Alberelli
* Copyright (C) 2003 Paul Mundt
*
*/
/*
* IRQs are in fact implemented a bit like signal handlers for the kernel.
* Naturally it's not a 1:1 relation, but there are similarities.
*/
#include <linux/errno.h>
#include <linux/kernel_stat.h>
#include <linux/signal.h>
#include <linux/rwsem.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/timex.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/smp.h>
#include <asm/pgalloc.h>
#include <asm/delay.h>
#include <asm/irq.h>
#include <linux/irq.h>
void ack_bad_irq(unsigned int irq)
{
printk("unexpected IRQ trap at irq %02x\n", irq);
}
#if defined(CONFIG_PROC_FS)
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, j;
struct irqaction * action;
unsigned long flags;
if (i == 0) {
seq_puts(p, " ");
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}
if (i < NR_IRQS) {
spin_lock_irqsave(&irq_desc[i].lock, flags);
action = irq_desc[i].action;
if (!action)
goto unlock;
seq_printf(p, "%3d: ",i);
seq_printf(p, "%10u ", kstat_irqs(i));
seq_printf(p, " %14s", irq_desc[i].chip->typename);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
seq_printf(p, ", %s", action->name);
seq_putc(p, '\n');
unlock:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
}
return 0;
}
#endif
/*
* do_NMI handles all Non-Maskable Interrupts.
*/
asmlinkage void do_NMI(unsigned long vector_num, struct pt_regs * regs)
{
if (regs->sr & 0x40000000)
printk("unexpected NMI trap in system mode\n");
else
printk("unexpected NMI trap in user mode\n");
/* No statistics */
}
/*
* do_IRQ handles all normal device IRQ's.
*/
asmlinkage int do_IRQ(unsigned long vector_num, struct pt_regs * regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
int irq;
irq_enter();
irq = irq_demux(vector_num);
if (irq >= 0) {
__do_IRQ(irq);
} else {
printk("unexpected IRQ trap at vector %03lx\n", vector_num);
}
irq_exit();
set_irq_regs(old_regs);
return 1;
}
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