source: rtems/bsps/m68k/mcf5206elite/dev/timerisr.S @ 2190bc6

5
Last change on this file since 2190bc6 was 2190bc6, checked in by Sebastian Huber <sebastian.huber@…>, on Mar 26, 2018 at 10:20:45 AM

bsps/mcf5206elite: Move libcpu content to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

  • Property mode set to 100644
File size: 1.3 KB
Line 
1/**
2 *  @file
3 *  @brief Handle MCF5206 TIMER2 interrupts
4 *
5 * All code in this routine is pure overhead which can perturb the
6 * accuracy of RTEMS' timing test suite.
7 *
8 * See also:    benchmark_timer_read()
9 *
10 * To reduce overhead this is best to be the "rawest" hardware interupt
11 * handler you can write.  This should be the only interrupt which can
12 * occur during the measured time period.
13 *
14 * An external counter, Timer_interrupts, is incremented.
15 */
16
17/*
18 *  Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia
19 *  Author: Victor V. Vengerov <vvv@oktet.ru>
20 *
21 *  This file based on work:
22 *  Author:
23 *    David Fiddes, D.J@fiddes.surfaid.org
24 *    http://www.calm.hw.ac.uk/davidf/coldfire/
25 *
26 *  COPYRIGHT (c) 1989-1998.
27 *  On-Line Applications Research Corporation (OAR).
28 *
29 *  The license and distribution terms for this file may be
30 *  found in the file LICENSE in this distribution or at
31 *  http://www.rtems.org/license/LICENSE.
32 */
33
34#include <rtems/asm.h>
35#include <bsp.h>
36#include "mcf5206/mcf5206e.h"
37
38BEGIN_CODE
39        PUBLIC(timerisr)
40SYM(timerisr):
41        move.l   a0, a7@-
42        move.l   #MCF5206E_TER(BSP_MEM_ADDR_IMM, 2), a0
43        move.b   # (MCF5206E_TER_REF + MCF5206E_TER_CAP), (a0)
44        addq.l   #1,SYM(Timer_interrupts) | increment timer value
45        move.l   a7@+, a0
46        rte
47END_CODE
48END
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