4.104.114.84.95
Last change
on this file since 18647b7 was
18647b7,
checked in by Joel Sherrill <joel.sherrill@…>, on 04/25/97 at 16:58:10
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updated to reflect new license per John Gwynne's permission.
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-
Property mode set to
100644
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File size:
1.2 KB
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Rev | Line | |
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[486c329] | 1 | /* |
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| 2 | *------------------------------------------------------------------- |
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| 3 | * |
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| 4 | * This file contains the subroutines necessary to initalize |
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| 5 | * and maintain the MAX791 based watchdog timer used on efi68k |
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| 6 | * |
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| 7 | * This file has been created by John S. Gwynne for the efi68k |
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| 8 | * project. |
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| 9 | * |
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[18647b7] | 10 | * The license and distribution terms for this file may in |
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| 11 | * the file LICENSE in this distribution or at |
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| 12 | * http://www.OARcorp.com/rtems/license.html. |
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[486c329] | 13 | * |
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| 14 | *------------------------------------------------------------------ |
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| 15 | * |
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| 16 | * $Id$ |
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| 17 | */ |
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| 18 | #include <bsp.h> |
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| 19 | |
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| 20 | void wd_interrupt(void) { |
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| 21 | /* toggle WDI of the MAX791. A more sophisticated routine |
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| 22 | can be inserted into the exception table after booting. */ |
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| 23 | |
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| 24 | /* 3 changes guaranty a pulse independent of initial state */ |
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| 25 | *MCR |= OUT1; |
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| 26 | *MCR &= ~OUT1; |
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| 27 | *MCR |= OUT1; |
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| 28 | } |
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| 29 | |
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| 30 | /* _catchWDint is the interrupt front-end */ |
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| 31 | extern void _catchWDint(); |
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| 32 | asm(" .text |
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| 33 | .align 2 |
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| 34 | .globl _catchWDint |
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| 35 | _catchWDint: |
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| 36 | lea %sp@(4),%sp /* pop return address */ |
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| 37 | moveml %d0-%d7/%a0-%a6,%sp@- /* save registers */ |
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| 38 | jbsr wd_interrupt |
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| 39 | moveml %sp@+,%d0-%d7/%a0-%a6 |
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| 40 | rte |
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| 41 | "); |
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| 42 | |
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| 43 | void watch_dog_init(void) { |
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| 44 | set_vector(_catchWDint, WD_ISR_LEVEL+24, 0); |
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| 45 | } |
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