5a4a4ad851
Mark interrupts with no_action handler, cascade interrupts, low level interrupts (bus error, halt ..) with IRQF_NO_THREAD to exclude them from forced threading. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mips@linux-mips.org Cc: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
|
|
* IRQ vector handles
|
|
*
|
|
* 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.
|
|
*
|
|
* Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/pci.h>
|
|
|
|
#include <asm/i8259.h>
|
|
#include <asm/irq_cpu.h>
|
|
#include <asm/irq_gt641xx.h>
|
|
#include <asm/gt64120.h>
|
|
|
|
#include <irq.h>
|
|
|
|
asmlinkage void plat_irq_dispatch(void)
|
|
{
|
|
unsigned pending = read_c0_status() & read_c0_cause() & ST0_IM;
|
|
int irq;
|
|
|
|
if (pending & CAUSEF_IP2)
|
|
gt641xx_irq_dispatch();
|
|
else if (pending & CAUSEF_IP6) {
|
|
irq = i8259_irq();
|
|
if (irq < 0)
|
|
spurious_interrupt();
|
|
else
|
|
do_IRQ(irq);
|
|
} else if (pending & CAUSEF_IP3)
|
|
do_IRQ(MIPS_CPU_IRQ_BASE + 3);
|
|
else if (pending & CAUSEF_IP4)
|
|
do_IRQ(MIPS_CPU_IRQ_BASE + 4);
|
|
else if (pending & CAUSEF_IP5)
|
|
do_IRQ(MIPS_CPU_IRQ_BASE + 5);
|
|
else if (pending & CAUSEF_IP7)
|
|
do_IRQ(MIPS_CPU_IRQ_BASE + 7);
|
|
else
|
|
spurious_interrupt();
|
|
}
|
|
|
|
static struct irqaction cascade = {
|
|
.handler = no_action,
|
|
.name = "cascade",
|
|
.flags = IRQF_NO_THREAD,
|
|
};
|
|
|
|
void __init arch_init_irq(void)
|
|
{
|
|
mips_cpu_irq_init();
|
|
gt641xx_irq_init();
|
|
init_i8259_irqs();
|
|
|
|
setup_irq(GT641XX_CASCADE_IRQ, &cascade);
|
|
setup_irq(I8259_CASCADE_IRQ, &cascade);
|
|
}
|