mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 14:52:05 +00:00
eedbdab99f
Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
105 lines
2.3 KiB
C
105 lines
2.3 KiB
C
/*
|
|
* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
|
|
* Copyright (C) 2007-2009 PetaLogix
|
|
* Copyright (C) 2006 Atmark Techno, Inc.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/hardirq.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irqflags.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/kernel_stat.h>
|
|
#include <linux/irq.h>
|
|
|
|
#include <asm/prom.h>
|
|
|
|
unsigned int irq_of_parse_and_map(struct device_node *dev, int index)
|
|
{
|
|
struct of_irq oirq;
|
|
|
|
if (of_irq_map_one(dev, index, &oirq))
|
|
return NO_IRQ;
|
|
|
|
return oirq.specifier[0];
|
|
}
|
|
EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
|
|
|
|
/*
|
|
* 'what should we do if we get a hw irq event on an illegal vector'.
|
|
* each architecture has to answer this themselves.
|
|
*/
|
|
void ack_bad_irq(unsigned int irq)
|
|
{
|
|
printk(KERN_WARNING "unexpected IRQ trap at vector %02x\n", irq);
|
|
}
|
|
|
|
static u32 concurrent_irq;
|
|
|
|
void do_IRQ(struct pt_regs *regs)
|
|
{
|
|
unsigned int irq;
|
|
struct pt_regs *old_regs = set_irq_regs(regs);
|
|
|
|
irq_enter();
|
|
irq = get_irq(regs);
|
|
next_irq:
|
|
BUG_ON(irq == -1U);
|
|
generic_handle_irq(irq);
|
|
|
|
irq = get_irq(regs);
|
|
if (irq != -1U) {
|
|
pr_debug("next irq: %d\n", irq);
|
|
++concurrent_irq;
|
|
goto next_irq;
|
|
}
|
|
|
|
irq_exit();
|
|
set_irq_regs(old_regs);
|
|
}
|
|
|
|
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_printf(p, " ");
|
|
for_each_online_cpu(j)
|
|
seq_printf(p, "CPU%-8d", j);
|
|
seq_putc(p, '\n');
|
|
}
|
|
|
|
if (i < nr_irq) {
|
|
spin_lock_irqsave(&irq_desc[i].lock, flags);
|
|
action = irq_desc[i].action;
|
|
if (!action)
|
|
goto skip;
|
|
seq_printf(p, "%3d: ", i);
|
|
#ifndef CONFIG_SMP
|
|
seq_printf(p, "%10u ", kstat_irqs(i));
|
|
#else
|
|
for_each_online_cpu(j)
|
|
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
|
|
#endif
|
|
seq_printf(p, " %8s", irq_desc[i].status &
|
|
IRQ_LEVEL ? "level" : "edge");
|
|
seq_printf(p, " %8s", irq_desc[i].chip->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');
|
|
skip:
|
|
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
|
|
}
|
|
return 0;
|
|
}
|