diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/efi68k/startup/efi68k_wd.c')
| -rw-r--r-- | c/src/lib/libbsp/m68k/efi68k/startup/efi68k_wd.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/efi68k/startup/efi68k_wd.c b/c/src/lib/libbsp/m68k/efi68k/startup/efi68k_wd.c new file mode 100644 index 0000000000..78c3d1e00a --- /dev/null +++ b/c/src/lib/libbsp/m68k/efi68k/startup/efi68k_wd.c @@ -0,0 +1,45 @@ +/* + *------------------------------------------------------------------- + * + * 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. + * + *------------------------------------------------------------------ + * + * $Id$ + */ +#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); +} |