source: rtems/c/src/lib/libbsp/m68k/dmv152/timer/timerisr.S @ c2e9632

4.104.114.84.95
Last change on this file since c2e9632 was 9980062, checked in by Joel Sherrill <joel.sherrill@…>, on Sep 4, 2003 at 6:51:36 PM

2003-09-04 Joel Sherrill <joel@…>

  • clock/ckinit.c, console/console.c, include/bsp.h, include/coverhd.h, spurious/spinit.c, startup/bspclean.c, startup/bspstart.c, startup/linkcmds, startup/vmeintr.c, timer/timer.c, timer/timerisr.S: URL for license changed.
  • Property mode set to 100644
File size: 983 bytes
Line 
1/*  timer_isr()
2 *
3 *  This routine provides the ISR for the Z8536 timer on the DMV152
4 *  board.   The timer is set up to generate an interrupt at maximum
5 *  intervals.
6 *
7 *  Input parameters:  NONE
8 *
9 *  Output parameters:  NONE
10 *
11 *  COPYRIGHT (c) 1989-1999.
12 *  On-Line Applications Research Corporation (OAR).
13 *
14 *  The license and distribution terms for this file may be
15 *  found in the file LICENSE in this distribution or at
16 *  http://www.rtems.com/license/LICENSE.
17 *
18 *  $Id$
19 */
20
21#include "asm.h"
22
23BEGIN_CODE
24
25.set TIMER,           0x0c000007         | port A
26.set CT1_CMD_STATUS,  0x0a               | command status register
27.set RELOAD,          0x26               | clr IP & IUS,allow countdown
28
29        PUBLIC(timerisr)
30SYM (timerisr):
31        movb    #CT1_CMD_STATUS,TIMER    | set pointer to cmd status reg
32        movb    #RELOAD,TIMER            | reload countdown
33        addql   #1, SYM (Ttimer_val)     | increment timer value
34        rte
35
36END_CODE
37END
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