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/*
* 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/ftrace.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 <linux/of_irq.h>
#include <asm/prom.h>
static u32 concurrent_irq;
void __irq_entry do_IRQ(struct pt_regs *regs)
{
unsigned int irq;
struct pt_regs *old_regs = set_irq_regs(regs);
trace_hardirqs_off();
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);
trace_hardirqs_on();
}
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, j;
struct irq_desc *desc;
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) {
desc = irq_to_desc(i);
raw_spin_lock_irqsave(&desc->lock, flags);
action = desc->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", desc->status &
IRQ_LEVEL ? "level" : "edge");
seq_printf(p, " %8s", desc->irq_data.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:
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
return 0;
}
/* MS: There is no any advance mapping mechanism. We are using simple 32bit
intc without any cascades or any connection that's why mapping is 1:1 */
unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq)
{
return hwirq;
}
EXPORT_SYMBOL_GPL(irq_create_mapping);
unsigned int irq_create_of_mapping(struct device_node *controller,
const u32 *intspec, unsigned int intsize)
{
return intspec[0];
}
EXPORT_SYMBOL_GPL(irq_create_of_mapping);
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