path: root/c/src/lib/libbsp/m68k/mvme162/startup/bspstart.c

/*  bsp_start()
 *
 *  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.
 *
 *  INPUT:  NONE
 *
 *  OUTPUT: NONE
 *
 *  COPYRIGHT (c) 1989-1998.
 *  On-Line Applications Research Corporation (OAR).
 *  Copyright assigned to U.S. Government, 1994.
 *
 *  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.
 *
 *  $Id$
 */

#include <bsp.h>
#include <rtems/libio.h>
#include <page_table.h>
 
#include <libcsupport.h>
 
#include <string.h>
 
#ifdef STACK_CHECKER_ON
#include <stackchk.h>
#endif

/*
 *  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;

/*      Initialize whatever libc we are using
 *      called from postdriver hook
 */

void bsp_libc_init()
{
    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);

    RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);

    /*
     *  Init the RTEMS libio facility to provide UNIX-like system
     *  calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
     *  Uses malloc() to get area for the iops, so must be after malloc init
     */

    rtems_libio_init();

    /*
     * Set up for the libc handling.
     */

    if (BSP_Configuration.ticks_per_timeslice > 0)
        libc_init(1);                /* reentrant if possible */
    else
        libc_init(0);                /* non-reentrant */
}

/*
 *  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)
{
    bsp_libc_init();
 
#ifdef STACK_CHECKER_ON
    /*
     *  Initialize the stack bounds checker
     *  We can either turn it on here or from the app.
     */
 
    Stack_check_Initialize();
#endif
 
#ifdef RTEMS_DEBUG
    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
 

/*
 *  Use the shared bsp_postdriver_hook() implementation 
 */
 
void bsp_postdriver_hook(void);


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

  /*
   *  162Bug Vectors are at 0xFFE00000
   *  162Bug Vectors on LX are at 0x00000000
   */

#if defined(mvme162lx)
  monitors_vector_table = (m68k_isr_entry *)0x00000000;
#else
  monitors_vector_table = (m68k_isr_entry *)0xFFE00000;
#endif

  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 */
  M68Kvec[ 47 ] = monitors_vector_table[ 47 ];   /* system call vector */

  m68k_set_vbr( &M68Kvec );

  /*
   *  You may wish to make the VME arbitration round-robin here, currently
   *  we leave it as it is.
   */

  /* set the Interrupt Base Vectors */

  lcsr->vector_base = (VBR0 << 28) | (VBR1 << 24);

  page_table_init();

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

  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */

  Cpu_table.predriver_hook = NULL;

  Cpu_table.postdriver_hook = bsp_postdriver_hook;

  Cpu_table.idle_task = NULL;  /* do not override system IDLE task */

  Cpu_table.do_zero_of_workspace = TRUE;

  Cpu_table.interrupt_vector_table = (m68k_isr_entry *) &M68Kvec;

  Cpu_table.interrupt_stack_size = 4096;

  Cpu_table.extra_mpci_receive_server_stack = 0;

  /*
   *  Copy the table
   */

  BSP_Configuration = Configuration;

  /*
   * Tell libio how many fd's we want and allow it to tweak config
   */

  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);

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