diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/mvme136/startup/bspclean.c')
-rw-r--r-- | c/src/lib/libbsp/m68k/mvme136/startup/bspclean.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/mvme136/startup/bspclean.c b/c/src/lib/libbsp/m68k/mvme136/startup/bspclean.c new file mode 100644 index 0000000000..a8860032c7 --- /dev/null +++ b/c/src/lib/libbsp/m68k/mvme136/startup/bspclean.c @@ -0,0 +1,46 @@ +/* + * This routine returns control to 135Bug. + * + * COPYRIGHT (c) 1989-1997. + * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. + * + * 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 <rtems.h> +#include <bsp.h> +#include <clockdrv.h> +#include <z8036.h> + +void bsp_return_to_monitor_trap() +{ + extern void start( void ); + + register volatile void *start_addr; + + m68k_set_vbr( 0 ); /* restore 135Bug vectors */ + asm volatile( "trap #15" ); /* trap to 135Bug */ + asm volatile( ".short 0x63" ); /* return to 135Bug (.RETURN) */ + /* restart program */ + start_addr = start; + + asm volatile ( "jmp %0@" : "=a" (start_addr) : "0" (start_addr) ); +} + +#define TIMER 0xfffb0000 + +void bsp_cleanup( void ) +{ + Z8x36_WRITE( TIMER, MASTER_INTR, 0x62 ); /* redo timer */ + Z8x36_WRITE( TIMER, CT1_MODE_SPEC, 0x00 ); + Z8x36_WRITE( TIMER, MASTER_CFG, 0xf4 ); + Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0x00 ); + + M68Kvec[ 45 ] = bsp_return_to_monitor_trap; /* install handler */ + asm volatile( "trap #13" ); /* insures SUPV mode */ +} |