linux-stable/arch/mips/tx4938/common/irq.c
Atsushi Nemoto c87abd75b3 [MIPS] Cleanup TX39/TX49 irq code
Cleanup jmr3927, tx4927 and tx4938 irq codes, using common IRQ_CPU,
I8259 and IRQ_TXX9 irq routines.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-08-27 02:16:53 +01:00

48 lines
1.3 KiB
C

/*
* 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/tx4938/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);
}