116 lines
2.4 KiB
C
116 lines
2.4 KiB
C
/*
|
|
* 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/config.h>
|
|
#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/smp_lock.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].handler->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)
|
|
{
|
|
int irq;
|
|
|
|
irq_enter();
|
|
|
|
irq = irq_demux(vector_num);
|
|
|
|
if (irq >= 0) {
|
|
__do_IRQ(irq, regs);
|
|
} else {
|
|
printk("unexpected IRQ trap at vector %03lx\n", vector_num);
|
|
}
|
|
|
|
irq_exit();
|
|
|
|
return 1;
|
|
}
|
|
|