Subversion Repositories openrisc_2011-10-31

/*

 *  This routine returns control to 162Bug.

 *

 *  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.

 *

 *

 *  Modifications of respective RTEMS file: COPYRIGHT (c) 1994.

 *  EISCAT Scientific Association. M.Savitski

 *

 *  This material is a part of the MVME162 Board Support Package

 *  for the RTEMS executive. Its licensing policies are those of the

 *  RTEMS above.

 *

 *  $Id: bspclean.c,v 1.2 2001-09-27 12:00:18 chris Exp $

 */

#include <rtems.h>

#include <bsp.h>

#include <zilog/z8036.h>

#include <page_table.h>

void bsp_return_to_monitor_trap()

{

  extern void start( void  );

  page_table_teardown();

  lcsr->intr_ena = 0;               /* disable interrupts */

#if defined(mvme162lx)

  m68k_set_vbr(0x00000000);         /* restore 162Bug vectors */

#else

  m68k_set_vbr(0xFFE00000);         /* restore 162Bug vectors */

#endif

  asm volatile( "trap   #15"  );    /* trap to 162Bug */

  asm volatile( ".short 0x63" );    /* return to 162Bug (.RETURN) */

                                    /* restart program */

  /*

   *  This does not work on the 162....

   */

#if 0

  {  register volatile void *start_addr;

     start_addr = start;

     asm volatile ( "jmp %0@" : "=a" (start_addr) : "0" (start_addr) );

  }

#endif

}

void bsp_cleanup( void )

{

   M68Kvec[ 45 ] = bsp_return_to_monitor_trap;   /* install handler */

   asm volatile( "trap #13" );  /* insures SUPV mode */

}