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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.
*
* Redistribution and use in source and binary forms are permitted
* provided that the following conditions are met:
* 1. Redistribution of source code and documentation must retain
* the above authorship, this list of conditions and the
* following disclaimer.
* 2. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* This software is provided "AS IS" without warranty of any kind,
* either expressed or implied, including, but not limited to, the
* implied warranties of merchantability, title and fitness for a
* particular purpose.
*
*------------------------------------------------------------------
*
* $Id$
*/
#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
.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);
}
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