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/*  timerisr.s

 *

 *  If required this ISR is used to bump a count of interval "overflow"

 *  interrupts which have occurred since the timer was started.  The

 *  number of overflows is taken into account in the Read_timer()

 *  routine if necessary.

 *

 *  To reduce overhead this is best to be the "rawest" hardware interupt

 *  handler you can write.  This should be the only interrupt which can

 *  occur during the measured time period.

 *

 *  NOTE:  This file is USUALLY in assembly and is LEAN AND MEAN.

 *         Any code in this isr is pure overhead which can perturb

 *         the accuracy of the Timing Test Suite.

 *

 *  COPYRIGHT (c) 1989-1999.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 *  $Id: timerisr.c,v 1.2 2001-09-27 12:00:27 chris Exp $

 */

#include <rtems.h>

extern rtems_unsigned32 _Timer_interrupts;

void timerisr( void )

{

  /*

   *  _Timer_interrupts += TIMER_BETWEEN_OVERFLOWS  (usually in microseconds)

   *  return from interrupt

   */

}