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/*

 *  This routine returns control to 135Bug.

 *

 *  COPYRIGHT (c) 1989-1999.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 *  $Id: bspclean.c,v 1.2 2001-09-27 12:00:14 chris Exp $

 */

#include <rtems.h>

#include <bsp.h>

#include <clockdrv.h>

#include <zilog/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 */

}