2 * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
3 * Author: Fuxin Zhang, zhangfx@lemote.com
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
10 #include <linux/interrupt.h>
12 #include <asm/irq_cpu.h>
13 #include <asm/i8259.h>
17 static void i8259_irqdispatch(void)
28 asmlinkage void mach_irq_dispatch(unsigned int pending)
30 if (pending & CAUSEF_IP7)
31 do_IRQ(MIPS_CPU_IRQ_BASE + 7);
32 else if (pending & CAUSEF_IP6) /* perf counter loverflow */
34 else if (pending & CAUSEF_IP5)
36 else if (pending & CAUSEF_IP2)
42 static struct irqaction cascade_irqaction = {
45 .flags = IRQF_NO_THREAD,
48 void __init mach_init_irq(void)
50 /* init all controller
51 * 0-15 ------> i8259 interrupt
52 * 16-23 ------> mips cpu interrupt
53 * 32-63 ------> bonito irq
56 /* most bonito irq should be level triggered */
57 LOONGSON_INTEDGE = LOONGSON_ICU_SYSTEMERR | LOONGSON_ICU_MASTERERR |
58 LOONGSON_ICU_RETRYERR | LOONGSON_ICU_MBOXES;
60 /* Sets the first-level interrupt dispatcher. */
65 /* bonito irq at IP2 */
66 setup_irq(MIPS_CPU_IRQ_BASE + 2, &cascade_irqaction);
68 setup_irq(MIPS_CPU_IRQ_BASE + 5, &cascade_irqaction);