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| 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 | |
| 34 | #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED |
| 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 | }; |
| 69 |
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v2.6.34-rc5
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