MIPS: Loongson: Naming style cleanup and rework
[linux-drm-fsl-dcu.git] / arch / mips / loongson64 / fuloong-2e / irq.c
1 /*
2  * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
3  * Author: Fuxin Zhang, zhangfx@lemote.com
4  *
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.
9  */
10 #include <linux/interrupt.h>
11
12 #include <asm/irq_cpu.h>
13 #include <asm/i8259.h>
14
15 #include <loongson.h>
16
17 static void i8259_irqdispatch(void)
18 {
19         int irq;
20
21         irq = i8259_irq();
22         if (irq >= 0)
23                 do_IRQ(irq);
24         else
25                 spurious_interrupt();
26 }
27
28 asmlinkage void mach_irq_dispatch(unsigned int pending)
29 {
30         if (pending & CAUSEF_IP7)
31                 do_IRQ(MIPS_CPU_IRQ_BASE + 7);
32         else if (pending & CAUSEF_IP6) /* perf counter loverflow */
33                 do_perfcnt_IRQ();
34         else if (pending & CAUSEF_IP5)
35                 i8259_irqdispatch();
36         else if (pending & CAUSEF_IP2)
37                 bonito_irqdispatch();
38         else
39                 spurious_interrupt();
40 }
41
42 static struct irqaction cascade_irqaction = {
43         .handler = no_action,
44         .name = "cascade",
45         .flags = IRQF_NO_THREAD,
46 };
47
48 void __init mach_init_irq(void)
49 {
50         /* init all controller
51          *   0-15         ------> i8259 interrupt
52          *   16-23        ------> mips cpu interrupt
53          *   32-63        ------> bonito irq
54          */
55
56         /* most bonito irq should be level triggered */
57         LOONGSON_INTEDGE = LOONGSON_ICU_SYSTEMERR | LOONGSON_ICU_MASTERERR |
58             LOONGSON_ICU_RETRYERR | LOONGSON_ICU_MBOXES;
59
60         /* Sets the first-level interrupt dispatcher. */
61         mips_cpu_irq_init();
62         init_i8259_irqs();
63         bonito_irq_init();
64
65         /* bonito irq at IP2 */
66         setup_irq(MIPS_CPU_IRQ_BASE + 2, &cascade_irqaction);
67         /* 8259 irq at IP5 */
68         setup_irq(MIPS_CPU_IRQ_BASE + 5, &cascade_irqaction);
69 }