Subversion Repositories openrisc_2011-10-31

/*

 *-------------------------------------------------------------------

 *

 * This file contains the subroutines necessary to initalize

 * and maintain the MAX791 based watchdog timer used on efi68k

 *

 * This file has been created by John S. Gwynne for the efi68k

 * project.

 *

 *  The license and distribution terms for this file may in

 *  the file LICENSE in this distribution or at

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

 *

 *------------------------------------------------------------------

 *

 *  $Id: efi68k_wd.c,v 1.2 2001-09-27 12:00:03 chris Exp $

 */

#include <bsp.h>

void wd_interrupt(void) {

  /* toggle WDI of the MAX791. A more sophisticated routine

     can be inserted into the exception table after booting. */

  /* 3 changes guaranty a pulse independent of initial state */

  *MCR |= OUT1;

  *MCR &= ~OUT1;

  *MCR |= OUT1;

}

/* _catchWDint is the interrupt front-end */

extern void _catchWDint();

asm("   .text

        .align 2

        .globl _catchWDint

_catchWDint:

        lea    %sp@(4),%sp                /* pop return address */

        moveml %d0-%d7/%a0-%a6,%sp@-       /* save registers */

        jbsr    wd_interrupt

        moveml  %sp@+,%d0-%d7/%a0-%a6

        rte

    ");

void watch_dog_init(void) {

  set_vector(_catchWDint, WD_ISR_LEVEL+24, 0);

}