Subversion Repositories openrisc

/*  timer_isr()

 *

 *  This routine provides the ISR for the Z8036 timer on the MVME136

 *  board.   The timer is set up to generate an interrupt at maximum

 *  intervals.

 *

 *  Input parameters:  NONE

 *

 *  Output parameters:  NONE

 *

 *  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.S,v 1.2 2001-09-27 11:59:50 chris Exp $

 */

#include "asm.h"

        BEGIN_CODE

        EXTERN (Ttimer_val)

        PUBLIC (timerisr)

SYM (timerisr):

        incl    SYM (Ttimer_val)   # add another tick

        pushl   eax

        movb    0xa0,al         /* signal generic End Of Interrupt (EOI) to slave PIC */

        outb    al, $0x20

        movb    $0x20, al

        outb    al, $0x20       /* signal generic EOI to Master PIC */

        popl    eax

        iret

END_CODE

END