source: rtems/c/src/lib/libcpu/m68k/mcf5206/timer/timerisr.S @ 00717a3

4.104.114.84.95
Last change on this file since 00717a3 was 00717a3, checked in by Joel Sherrill <joel.sherrill@…>, on Oct 26, 2001 at 7:32:40 PM

2001-10-26 Victor V. Vengerov <vvv@…>

  • New libcpu support for mcf5206e.
  • ChangeLog?, clock/ckinit.c, clock/.cvsignore, configure.ac, console/mcfuart.c, console/.cvsignore, include/mcf5206e.h, include/mcfmbus.h, include/mcfuart.h, include/.cvsignore, mbus/mcfmbus.c, mbus/.cvsignore, timer/timer.c, timer/timerisr.S, timer/.cvsignore, .cvsignore: New files.
  • Property mode set to 100644
File size: 1.3 KB
Line 
1/*
2 *  Handle MCF5206 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 *  Copyright assigned to U.S. Government, 1994.
26 *
27 *  The license and distribution terms for this file may be
28 *  found in the file LICENSE in this distribution or at
29 *
30 *  http://www.OARcorp.com/rtems/license.html.
31 *
32 *  $Id$
33 */
34
35#include "asm.h"
36#include "bsp.h"
37#include "mcf5206/mcf5206e.h"
38
39BEGIN_CODE
40        PUBLIC(timerisr)
41SYM(timerisr):
42        move.l   a0, a7@-
43        move.l   #MCF5206E_TER(BSP_MEM_ADDR_IMM, 2), a0
44        move.b   # (MCF5206E_TER_REF + MCF5206E_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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