source: rtems/c/src/lib/libbsp/m68k/dmv152/startup/bspstart.c @ 08311cc3

/*
 *  This routine starts the application.  It includes application,
 *  board, and monitor specific initialization and configuration.
 *  The generic CPU dependent initialization has been performed
 *  before this routine is invoked.
 *
 *  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.
 *
 *  $Id$
 */

#include <bsp.h>
#include <rtems/libio.h>
 
#include <libcsupport.h>
 
#include <string.h>
 
/*
 *  The original table from the application and our copy of it with
 *  some changes.
 */

extern rtems_configuration_table  Configuration;
rtems_configuration_table         BSP_Configuration;

rtems_cpu_table Cpu_table;

char *rtems_progname;

/*
 *  Use the shared implementations of the following routines
 */
 
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, unsigned32, int );

/*
 *  Function:   bsp_pretasking_hook
 *  Created:    95/03/10
 *
 *  Description:
 *      BSP pretasking hook.  Called just before drivers are initialized.
 *      Used to setup libc and install any BSP extensions.
 *
 *  NOTES:
 *      Must not use libc (to do io) from here, since drivers are
 *      not yet initialized.
 *
 */
 
void bsp_pretasking_hook(void)
{
    extern int end;
    rtems_unsigned32        heap_start;

    heap_start = (rtems_unsigned32) &end;
    if (heap_start & (CPU_ALIGNMENT-1))
        heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);

    bsp_libc_init((void *) heap_start, 64 * 1024, 0);
 
#ifdef RTEMS_DEBUG
    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
 
/*
 *  bsp_start
 *
 *  This routine does the bulk of the system initialization.
 */

void bsp_start( void )
{
  m68k_isr_entry *monitors_vector_table;
  int             index;
  void           *vbr;

  monitors_vector_table = (m68k_isr_entry *)0;   /* Monitor Vectors are at 0 */
  m68k_set_vbr( monitors_vector_table );

  for ( index=2 ; index<=255 ; index++ )
    M68Kvec[ index ] = monitors_vector_table[ 32 ];

  M68Kvec[  2 ] = monitors_vector_table[  2 ];   /* bus error vector */
  M68Kvec[  4 ] = monitors_vector_table[  4 ];   /* breakpoints vector */
  M68Kvec[  9 ] = monitors_vector_table[  9 ];   /* trace vector */

  /*
   *  Uncommenting this seems to confuse/break the monitor on this board.
   *  It probably assumes the vector table is at 0.
   */

  /* m68k_set_vbr( &M68Kvec ); */

  /*
   *  Adjust the VMEbus mode to round-robin.
   */

  /*
   *  This is only apparent with the shared memory driver which has not
   *  yet been supported on this target.
   */

  m68k_enable_caching();

  /*
   *  we only use a hook to get the C library initialized.
   */

  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
  Cpu_table.postdriver_hook = bsp_postdriver_hook;
  Cpu_table.do_zero_of_workspace = TRUE;
  Cpu_table.interrupt_stack_size = 4096;

  m68k_get_vbr( vbr );
  Cpu_table.interrupt_vector_table = vbr;

  BSP_Configuration.work_space_start = (void *)
     (RAM_END - BSP_Configuration.work_space_size);

  /*
   *  Account for the console's resources
   */

  console_reserve_resources( &BSP_Configuration );

  /* Clock_exit is done as an atexit() function */
}