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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1919 | jermar | 1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 1920 | jermar | 29 | /** @addtogroup genericddi |
| 1919 | jermar | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 35 | #ifndef KERN_IRQ_H_ |
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| 36 | #define KERN_IRQ_H_ |
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| 37 | |||
| 38 | #include <arch/types.h> |
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| 39 | #include <adt/list.h> |
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| 1921 | jermar | 40 | #include <ipc/ipc.h> |
| 41 | #include <ipc/irq.h> |
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| 42 | #include <atomic.h> |
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| 43 | #include <synch/spinlock.h> |
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| 1919 | jermar | 44 | |
| 45 | typedef enum { |
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| 46 | IRQ_DECLINE, /**< Decline to service. */ |
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| 47 | IRQ_ACCEPT /**< Accept to service. */ |
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| 48 | } irq_ownership_t; |
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| 49 | |||
| 50 | typedef enum { |
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| 51 | IRQ_TRIGGER_LEVEL = 1, |
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| 52 | IRQ_TRIGGER_EDGE |
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| 53 | } irq_trigger_t; |
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| 54 | |||
| 55 | typedef struct irq irq_t; |
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| 56 | |||
| 57 | typedef void (* irq_handler_t)(irq_t *irq, void *arg, ...); |
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| 58 | |||
| 59 | /** Structure representing one device IRQ. |
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| 60 | * |
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| 61 | * If one device has multiple interrupts, there will |
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| 62 | * be multiple irq_t instantions with the same |
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| 63 | * devno. |
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| 64 | */ |
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| 65 | struct irq { |
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| 66 | /** Hash table link. */ |
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| 67 | link_t link; |
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| 68 | |||
| 1921 | jermar | 69 | /** Lock protecting everything in this structure |
| 70 | * except the link member. When both the IRQ |
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| 71 | * hash table lock and this lock are to be acquired, |
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| 72 | * this lock must not be taken first. |
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| 73 | */ |
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| 74 | SPINLOCK_DECLARE(lock); |
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| 75 | |||
| 1919 | jermar | 76 | /** Unique device number. -1 if not yet assigned. */ |
| 77 | devno_t devno; |
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| 78 | |||
| 79 | /** Actual IRQ number. -1 if not yet assigned. */ |
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| 80 | inr_t inr; |
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| 81 | /** Trigger level of the IRQ.*/ |
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| 82 | irq_trigger_t trigger; |
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| 83 | /** Claim ownership of the IRQ. */ |
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| 84 | irq_ownership_t (* claim)(void); |
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| 85 | /** Handler for this IRQ and device. */ |
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| 86 | irq_handler_t handler; |
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| 87 | /** Argument for the handler. */ |
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| 88 | void *arg; |
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| 1921 | jermar | 89 | |
| 90 | /** Answerbox of the task that wanted to be notified. */ |
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| 91 | answerbox_t *notif_answerbox; |
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| 92 | /** Pseudo-code to be performed by the top-half |
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| 93 | * before a notification is sent. */ |
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| 94 | irq_code_t *code; |
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| 95 | /** Counter of IRQ notifications. */ |
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| 96 | atomic_t counter; |
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| 1919 | jermar | 97 | }; |
| 98 | |||
| 99 | extern void irq_init(count_t inrs, count_t chains); |
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| 100 | extern void irq_initialize(irq_t *irq); |
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| 101 | extern void irq_register(irq_t *irq); |
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| 102 | extern irq_t *irq_dispatch(inr_t inr); |
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| 103 | |||
| 104 | #endif |
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| 105 | |||
| 106 | /** @} |
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| 107 | */ |