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/*
* arch/v850/kernel/irq.c -- High-level interrupt handling
*
* Copyright (C) 2001,02,03,04,05 NEC Electronics Corporation
* Copyright (C) 2001,02,03,04,05 Miles Bader <miles@gnu.org>
* Copyright (C) 1994-2000 Ralf Baechle
* Copyright (C) 1992 Linus Torvalds
*
* 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.
*
* This file was was derived from the mips version, arch/mips/kernel/irq.c
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/irq.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/random.h>
#include <linux/seq_file.h>
#include <asm/system.h>
/*
* 'what should we do if we get a hw irq event on an illegal vector'.
* each architecture has to answer this themselves, it doesn't deserve
* a generic callback i think.
*/
void ack_bad_irq(unsigned int irq)
{
printk("received IRQ %d with unknown interrupt type\n", irq);
}
volatile unsigned long irq_err_count, spurious_count;
/*
* Generic, controller-independent functions:
*/
int show_interrupts(struct seq_file *p, void *v)
{
int irq = *(loff_t *) v;
if (irq == 0) {
int cpu;
seq_puts(p, " ");
for (cpu=0; cpu < 1 /*smp_num_cpus*/; cpu++)
seq_printf(p, "CPU%d ", cpu);
seq_putc(p, '\n');
}
if (irq < NR_IRQS) {
unsigned long flags;
struct irqaction *action;
spin_lock_irqsave(&irq_desc[irq].lock, flags);
action = irq_desc[irq].action;
if (action) {
int j;
int count = 0;
int num = -1;
const char *type_name = irq_desc[irq].handler->typename;
for (j = 0; j < NR_IRQS; j++)
if (irq_desc[j].handler->typename == type_name){
if (irq == j)
num = count;
count++;
}
seq_printf(p, "%3d: ",irq);
seq_printf(p, "%10u ", kstat_irqs(irq));
if (count > 1) {
int prec = (num >= 100 ? 3 : num >= 10 ? 2 : 1);
seq_printf(p, " %*s%d", 14 - prec,
type_name, num);
} else
seq_printf(p, " %14s", type_name);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
seq_printf(p, ", %s", action->name);
seq_putc(p, '\n');
}
spin_unlock_irqrestore(&irq_desc[irq].lock, flags);
} else if (irq == NR_IRQS)
seq_printf(p, "ERR: %10lu\n", irq_err_count);
return 0;
}
/* Handle interrupt IRQ. REGS are the registers at the time of ther
interrupt. */
unsigned int handle_irq (int irq, struct pt_regs *regs)
{
irq_enter();
__do_IRQ(irq, regs);
irq_exit();
return 1;
}
/* Initialize irq handling for IRQs.
BASE_IRQ, BASE_IRQ+INTERVAL, ..., BASE_IRQ+NUM*INTERVAL
to IRQ_TYPE. An IRQ_TYPE of 0 means to use a generic interrupt type. */
void __init
init_irq_handlers (int base_irq, int num, int interval,
struct hw_interrupt_type *irq_type)
{
while (num-- > 0) {
irq_desc[base_irq].status = IRQ_DISABLED;
irq_desc[base_irq].action = NULL;
irq_desc[base_irq].depth = 1;
irq_desc[base_irq].handler = irq_type;
base_irq += interval;
}
}
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