source: rtems/c/src/lib/libcpu/m68k/mcf5272/timer/timerisr.S @ 5c9be63

4.104.114.95
Last change on this file since 5c9be63 was df2837ff, checked in by Joel Sherrill <joel.sherrill@…>, on Mar 12, 2007 at 11:16:53 AM

2007-03-12 Joel Sherrill <joel@…>

  • mcf5272/clock/ckinit.c, mcf5272/include/mcf5272.h, mcf5272/timer/timer.c, mcf5272/timer/timerisr.S: Correct license URL and/or fix mistake in copyright notice. Both of these mistakes appear to be from code submitted after these changes were made previously.
  • Property mode set to 100644
File size: 1.2 KB
Line 
1/*
2 *  Handle MCF5272 TIMER2 interrupts.
3 *
4 * All code in this routine is pure overhead which can perturb the
5 * accuracy of RTEMS' timing test suite.
6 *
7 * See also:    Read_timer()
8 *
9 * To reduce overhead this is best to be the "rawest" hardware interupt
10 * handler you can write.  This should be the only interrupt which can
11 * occur during the measured time period.
12 *
13 * An external counter, Timer_interrupts, is incremented.
14 *
15 *  Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia
16 *  Author: Victor V. Vengerov <vvv@oktet.ru>
17 *
18 *  This file based on work:
19 *  Author:
20 *    David Fiddes, D.J@fiddes.surfaid.org
21 *    http://www.calm.hw.ac.uk/davidf/coldfire/
22 *
23 *  COPYRIGHT (c) 1989-1998.
24 *  On-Line Applications Research Corporation (OAR).
25 *
26 *  The license and distribution terms for this file may be
27 *  found in the file LICENSE in this distribution or at
28 *
29 *  http://www.rtems.com/license/LICENSE.
30 *
31 *  timerisr.S,v 1.1 2001/10/26 19:32:40 joel Exp
32 */
33
34#include <rtems/asm.h>
35#include <bsp.h>
36/*
37#include "mcf5272/mcf5272.h"
38*/
39
40BEGIN_CODE
41        PUBLIC(timerisr)
42SYM(timerisr):
43        move.l   a0, a7@-
44        move.b   # (MCF5272_TER_REF + MCF5272_TER_CAP), (a0)
45        addq.l   #1,SYM(Timer_interrupts) | increment timer value
46        move.l   a7@+, a0
47        rte
48END_CODE
49END
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