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/*
*-------------------------------------------------------------------
*
* 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.rtems.com/license/LICENSE.
*
*------------------------------------------------------------------
*
* $Id$
*/
#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\n\
.align 2\n\
.globl _catchWDint\n\
_catchWDint:\n\
lea %sp@(4),%sp /* pop return address */\n\
moveml %d0-%d7/%a0-%a6,%sp@- /* save registers */\n\
jbsr wd_interrupt\n\
moveml %sp@+,%d0-%d7/%a0-%a6 \n\
rte\n\
");
void watch_dog_init(void) {
set_vector(_catchWDint, WD_ISR_LEVEL+24, 0);
}
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