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3795de23 TG |
1 | /* |
2 | * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar | |
3 | * Copyright (C) 2005-2006, Thomas Gleixner, Russell King | |
4 | * | |
5 | * This file contains the dummy interrupt chip implementation | |
6 | */ | |
7 | #include <linux/interrupt.h> | |
8 | #include <linux/irq.h> | |
9 | ||
10 | #include "internals.h" | |
11 | ||
12 | /* | |
13 | * What should we do if we get a hw irq event on an illegal vector? | |
14 | * Each architecture has to answer this themself. | |
15 | */ | |
16 | static void ack_bad(struct irq_data *data) | |
17 | { | |
18 | struct irq_desc *desc = irq_data_to_desc(data); | |
19 | ||
20 | print_irq_desc(data->irq, desc); | |
21 | ack_bad_irq(data->irq); | |
22 | } | |
23 | ||
24 | /* | |
25 | * NOP functions | |
26 | */ | |
27 | static void noop(struct irq_data *data) { } | |
28 | ||
29 | static unsigned int noop_ret(struct irq_data *data) | |
30 | { | |
31 | return 0; | |
32 | } | |
33 | ||
c0a19ebc | 34 | #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED |
3795de23 TG |
35 | static void compat_noop(unsigned int irq) { } |
36 | #define END_INIT .end = compat_noop | |
37 | #else | |
38 | #define END_INIT | |
39 | #endif | |
40 | ||
41 | /* | |
42 | * Generic no controller implementation | |
43 | */ | |
44 | struct irq_chip no_irq_chip = { | |
45 | .name = "none", | |
46 | .irq_startup = noop_ret, | |
47 | .irq_shutdown = noop, | |
48 | .irq_enable = noop, | |
49 | .irq_disable = noop, | |
50 | .irq_ack = ack_bad, | |
51 | END_INIT | |
52 | }; | |
53 | ||
54 | /* | |
55 | * Generic dummy implementation which can be used for | |
56 | * real dumb interrupt sources | |
57 | */ | |
58 | struct irq_chip dummy_irq_chip = { | |
59 | .name = "dummy", | |
60 | .irq_startup = noop_ret, | |
61 | .irq_shutdown = noop, | |
62 | .irq_enable = noop, | |
63 | .irq_disable = noop, | |
64 | .irq_ack = noop, | |
65 | .irq_mask = noop, | |
66 | .irq_unmask = noop, | |
67 | END_INIT | |
68 | }; |