| /* |
| * 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); |
| } |
