Subversion Repositories HelenOS

Rev

Rev 1919 | Rev 1921 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (C) 2006 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup genericddi
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_IRQ_H_
  36. #define KERN_IRQ_H_
  37.  
  38. #include <arch/types.h>
  39. #include <adt/list.h>
  40.  
  41. typedef enum {
  42.     IRQ_DECLINE,        /**< Decline to service. */
  43.     IRQ_ACCEPT      /**< Accept to service. */
  44. } irq_ownership_t;
  45.  
  46. typedef enum {
  47.     IRQ_TRIGGER_LEVEL = 1,
  48.     IRQ_TRIGGER_EDGE
  49. } irq_trigger_t;
  50.  
  51. typedef struct irq irq_t;
  52.  
  53. typedef void (* irq_handler_t)(irq_t *irq, void *arg, ...);
  54.  
  55. /** Structure representing one device IRQ.
  56.  *
  57.  * If one device has multiple interrupts, there will
  58.  * be multiple irq_t instantions with the same
  59.  * devno.
  60.  */
  61. struct irq {
  62.     /** Hash table link. */
  63.     link_t link;
  64.  
  65.     /** Unique device number. -1 if not yet assigned. */
  66.     devno_t devno;
  67.  
  68.     /** Actual IRQ number. -1 if not yet assigned. */
  69.     inr_t inr;
  70.     /** Task ID of the task to be notified about the IRQ or 0. */
  71.     task_id_t notif;
  72.     /** Trigger level of the IRQ.*/
  73.     irq_trigger_t trigger;
  74.     /** Claim ownership of the IRQ. */
  75.     irq_ownership_t (* claim)(void);
  76.     /** Handler for this IRQ and device. */
  77.     irq_handler_t handler;
  78.     /** Argument for the handler. */
  79.     void *arg;
  80. };
  81.  
  82. extern void irq_init(count_t inrs, count_t chains);
  83. extern void irq_initialize(irq_t *irq);
  84. extern void irq_register(irq_t *irq);
  85. extern irq_t *irq_dispatch(inr_t inr);
  86.  
  87. #endif
  88.  
  89. /** @}
  90.  */
  91.