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
22 void (*sni_hwint)(void);
23
24 asmlinkage void plat_irq_dispatch(void)
25 {
26 sni_hwint();
27 }
28
29 /* ISA irq handler */
30 irqreturn_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 */
47 void __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 }
77
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