source: rtems/cpukit/rtems/include/rtems/rtems/intr.h @ 092f142a

4.104.114.84.95
Last change on this file since 092f142a was 092f142a, checked in by Ralf Corsepius <ralf.corsepius@…>, on 01/28/05 at 05:00:21

New header guard.
  • Property mode set to 100644
File size: 3.1 KB
Line 
1/**
2 * @file rtems/rtems/intr.h
3 */
4
5/*
6 *  This include file contains all the constants and structures associated
7 *  with the Interrupt Manager.
8 *
9 *  COPYRIGHT (c) 1989-1999.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.com/license/LICENSE.
15 *
16 *  $Id$
17 */
18
19#ifndef _RTEMS_RTEMS_INTR_H
20#define _RTEMS_RTEMS_INTR_H
21
22#ifdef __cplusplus
23extern "C" {
24#endif
25
26#include <rtems/score/isr.h>
27
28/*
29 *  Interrupt level type
30 */
31
32typedef ISR_Level rtems_interrupt_level;
33
34/*
35 *  The following type defines the control block used to manage
36 *  the vectors.
37 */
38
39typedef ISR_Vector_number rtems_vector_number;
40
41/*
42 *  Return type for ISR Handler
43 */
44
45typedef void rtems_isr;
46
47/*
48 *  Pointer to an ISR Handler
49 */
50
51typedef rtems_isr ( *rtems_isr_entry )(
52                 rtems_vector_number
53             );
54
55/*
56 *  _Interrupt_Manager_initialization
57 *
58 *  DESCRIPTION:
59 *
60 *  This routine initializes the interrupt manager.
61 *
62 */
63
64void _Interrupt_Manager_initialization( void );
65
66/*
67 *  rtems_interrupt_catch
68 *
69 *  DESCRIPTION:
70 *
71 *  This routine implements the rtems_interrupt_catch directive.  This
72 *  directive installs new_isr_handler as the RTEMS interrupt service
73 *  routine for vector.  The previous RTEMS interrupt service
74 *  routine is returned in old_isr_handler.
75 */
76
77rtems_status_code rtems_interrupt_catch(
78  rtems_isr_entry      new_isr_handler,
79  rtems_vector_number  vector,
80  rtems_isr_entry     *old_isr_handler
81);
82
83/*
84 *  rtems_interrupt_disable
85 *
86 *  DESCRIPTION:
87 *
88 *  This routine disables all maskable interrupts and returns the
89 *  previous level in _isr_cookie.
90 */
91
92#define rtems_interrupt_disable( _isr_cookie ) \
93    _ISR_Disable(_isr_cookie)
94
95/*
96 *  rtems_interrupt_enable
97 *
98 *  DESCRIPTION:
99 *
100 *  This routine enables maskable interrupts to the level indicated
101 *  _isr_cookie.
102 */
103
104#define rtems_interrupt_enable( _isr_cookie ) \
105    _ISR_Enable(_isr_cookie)
106
107/*
108 *  rtems_interrupt_flash
109 *
110 *  DESCRIPTION:
111 *
112 *  This routine temporarily enables maskable interrupts to the
113 *  level in _isr_cookie before redisabling them.
114 */
115
116#define rtems_interrupt_flash( _isr_cookie ) \
117    _ISR_Flash(_isr_cookie)
118
119/*
120 *  rtems_interrupt_is_in_progress
121 *
122 *  DESCRIPTION:
123 *
124 *  This function returns TRUE if the processor is currently servicing
125 *  an interrupt and FALSE otherwise.   A return value of TRUE indicates
126 *  that the caller is an interrupt service routine, NOT a thread.  The
127 *  directives available to an interrupt service routine are restricted.
128 */
129
130#define rtems_interrupt_is_in_progress() \
131    _ISR_Is_in_progress()
132
133/*
134 *  rtems_interrupt_cause
135 *
136 *  DESCRIPTION:
137 *
138 *  This routine generates an interrupt.
139 *
140 *  NOTE:  No implementation.
141 */
142
143#define rtems_interrupt_cause( _interrupt_to_cause )
144
145/*
146 *  rtems_interrupt_cause
147 *
148 *  DESCRIPTION:
149 *
150 *  This routine clears the specified interrupt.
151 *
152 *  NOTE:  No implementation.
153 */
154
155#define rtems_interrupt_clear( _interrupt_to_clear )
156
157#ifdef __cplusplus
158}
159#endif
160
161#endif
162/* end of include file */
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