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/*
* linux/arch/mips/tx4938/common/irq.c
*
* Common tx4938 irq handler
* Copyright (C) 2000-2001 Toshiba Corporation
*
* 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
* terms of the GNU General Public License version 2. This program is
* licensed "as is" without any warranty of any kind, whether express
* or implied.
*
* Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
#include <asm/txx9/rbtx4938.h>
void __init
tx4938_irq_init(void)
{
mips_cpu_irq_init();
txx9_irq_init(TX4938_IRC_REG);
set_irq_chained_handler(TX4938_IRQ_NEST_PIC_ON_CP0, handle_simple_irq);
}
int toshiba_rbtx4938_irq_nested(int irq);
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending = read_c0_cause() & read_c0_status();
if (pending & STATUSF_IP7)
do_IRQ(TX4938_IRQ_CPU_TIMER);
else if (pending & STATUSF_IP2) {
int irq = txx9_irq();
if (irq == TX4938_IRQ_PIC_BEG + TX4938_IR_INT(0))
irq = toshiba_rbtx4938_irq_nested(irq);
if (irq >= 0)
do_IRQ(irq);
else
spurious_interrupt();
} else if (pending & STATUSF_IP1)
do_IRQ(TX4938_IRQ_USER1);
else if (pending & STATUSF_IP0)
do_IRQ(TX4938_IRQ_USER0);
}
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