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/arch/mips/sni/irq.c

http://github.com/mirrors/linux
C | 76 lines | 50 code | 11 blank | 15 comment | 2 complexity | daf7b9c9c9d32482cd5309b261bf9045 MD5 | raw file
 1/*
 2 * This file is subject to the terms and conditions of the GNU General Public
 3 * License.  See the file "COPYING" in the main directory of this archive
 4 * for more details.
 5 *
 6 * Copyright (C) 1992 Linus Torvalds
 7 * Copyright (C) 1994 - 2000 Ralf Baechle
 8 * Copyright (C) 2006 Thomas Bogendoerfer
 9 */
10#include <linux/delay.h>
11#include <linux/init.h>
12#include <linux/interrupt.h>
13#include <linux/irq.h>
14#include <linux/kernel.h>
15
16#include <asm/i8259.h>
17#include <asm/io.h>
18#include <asm/sni.h>
19#include <asm/irq.h>
20#include <asm/irq_cpu.h>
21
22void (*sni_hwint)(void);
23
24asmlinkage void plat_irq_dispatch(void)
25{
26	sni_hwint();
27}
28
29/* ISA irq handler */
30irqreturn_t sni_isa_irq_handler(int dummy, void *p)
31{
32	int irq;
33
34	irq = i8259_irq();
35	if (unlikely(irq < 0))
36		return IRQ_NONE;
37
38	generic_handle_irq(irq);
39	return IRQ_HANDLED;
40}
41
42/*
43 * On systems with i8259-style interrupt controllers we assume for
44 * driver compatibility reasons interrupts 0 - 15 to be the i8295
45 * interrupts even if the hardware uses a different interrupt numbering.
46 */
47void __init arch_init_irq(void)
48{
49	init_i8259_irqs();			/* Integrated i8259  */
50	switch (sni_brd_type) {
51	case SNI_BRD_10:
52	case SNI_BRD_10NEW:
53	case SNI_BRD_TOWER_OASIC:
54	case SNI_BRD_MINITOWER:
55		sni_a20r_irq_init();
56		break;
57
58	case SNI_BRD_PCI_TOWER:
59		sni_pcit_irq_init();
60		break;
61
62	case SNI_BRD_PCI_TOWER_CPLUS:
63		sni_pcit_cplus_irq_init();
64		break;
65
66	case SNI_BRD_RM200:
67		sni_rm200_irq_init();
68		break;
69
70	case SNI_BRD_PCI_MTOWER:
71	case SNI_BRD_PCI_DESKTOP:
72	case SNI_BRD_PCI_MTOWER_CPLUS:
73		sni_pcimt_irq_init();
74		break;
75	}
76}