source: rtems/cpukit/rtems/src/intrcatch.c @ c9973bb

4.104.114.84.95
Last change on this file since c9973bb was c9973bb, checked in by Joel Sherrill <joel.sherrill@…>, on May 17, 1999 at 11:22:45 PM

Split Interrupt Manager into one routine per file.

  • Property mode set to 100644
File size: 1.4 KB
Line 
1/*
2 *  Interrupt Manager
3 *
4 *
5 *  COPYRIGHT (c) 1989-1998.
6 *  On-Line Applications Research Corporation (OAR).
7 *  Copyright assigned to U.S. Government, 1994.
8 *
9 *  The license and distribution terms for this file may be
10 *  found in the file LICENSE in this distribution or at
11 *  http://www.OARcorp.com/rtems/license.html.
12 *
13 *  $Id$
14 */
15
16#include <rtems/system.h>
17#include <rtems/rtems/status.h>
18#include <rtems/score/isr.h>
19#include <rtems/rtems/intr.h>
20
21/*  rtems_interrupt_catch
22 *
23 *  This directive allows a thread to specify what action to take when
24 *  catching signals.
25 *
26 *  Input parameters:
27 *    new_isr_handler - address of interrupt service routine (isr)
28 *    vector          - interrupt vector number
29 *    old_isr_handler - address at which to store previous ISR address
30 *
31 *  Output parameters:
32 *    RTEMS_SUCCESSFUL - always succeeds
33 *    *old_isr_handler  - previous ISR address
34 */
35
36rtems_status_code rtems_interrupt_catch(
37  rtems_isr_entry      new_isr_handler,
38  rtems_vector_number  vector,
39  rtems_isr_entry     *old_isr_handler
40)
41{
42  if ( !_ISR_Is_vector_number_valid( vector ) )
43    return RTEMS_INVALID_NUMBER;
44
45  if ( !_ISR_Is_valid_user_handler( (void *) new_isr_handler ) )
46    return RTEMS_INVALID_ADDRESS;
47
48  if ( !_ISR_Is_valid_user_handler( (void *) old_isr_handler ) )
49    return RTEMS_INVALID_ADDRESS;
50
51  _ISR_Install_vector(
52    vector, (proc_ptr)new_isr_handler, (proc_ptr *)old_isr_handler );
53
54  return RTEMS_SUCCESSFUL;
55}
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