source: rtems/c/src/lib/libbsp/m68k/mvme147s/startup/bspstart.c @ c244a9ee

/*  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.
 *
 *  MVME147 port for TNI - Telecom Bretagne
 *  by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)
 *  May 1996
 *
 *  $Id$
 */

#include <bsp.h>
#include <rtems/libio.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;
  rtems_unsigned8 node_number;

  monitors_vector_table = (m68k_isr_entry *)0;   /* 147Bug 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 */
  M68Kvec[ 47 ] = monitors_vector_table[ 47 ];   /* system call vector */

  m68k_set_vbr( &M68Kvec );

  pcc->int_base_vector = PCC_BASE_VECTOR & 0xF0; 
  /* Set the PCC int vectors base */
  
  /* VME shared memory configuration */
  /* Only the first node shares its top 128k DRAM */

  vme_lcsr->utility_interrupt_vector = VME_BASE_VECTOR & 0xF8;
  /* Set VMEchip base interrupt vector */
  vme_lcsr->utility_interrupt_mask |= 0x02;
  /* Enable SIGLP interruption (see shm support) */
  pcc->general_purpose_control &= 0x10;
  /* Enable VME master interruptions */
  
  if (vme_lcsr->system_controller & 0x01) {
    /* the board is system controller */
    vme_lcsr->system_controller = 0x08; 
    /* Make VME access round-robin */
  }

  
  node_number = 
    (rtems_unsigned8) 
    (Configuration.User_multiprocessing_table->node - 1) & 0xF;
  /* Get and store node ID, first node_number = 0 */
  vme_gcsr->board_identification = node_number;

  vme_lcsr->gcsr_base_address = node_number;
  /* Setup the base address of this board's gcsr */
  vme_lcsr->timer_configuration = 0x6a;
  /* Enable VME time outs, maximum periods */

  if (node_number == 0) {
    pcc->slave_base_address = 0x01;
    /* Set local DRAM base address on the VME bus to the DRAM size */

    vme_lcsr->vme_bus_requester = 0x80;
    while (! (vme_lcsr->vme_bus_requester & 0x40));
    /* Get VMEbus mastership */
    vme_lcsr->slave_address_modifier = 0xfb;
    /* Share everything */
    vme_lcsr->slave_configuration = 0x80;
    /* Share local DRAM */
    vme_lcsr->vme_bus_requester = 0x0;
    /* release bus */
  } else {
    pcc->slave_base_address = 0;
    /* Set local DRAM base address on the VME bus to 0 */

    vme_lcsr->vme_bus_requester = 0x80;
    while (! (vme_lcsr->vme_bus_requester & 0x40));
    /* Get VMEbus mastership */
    vme_lcsr->slave_address_modifier = 0x08;
    /* Share only the short adress range */
    vme_lcsr->slave_configuration = 0;
    /* Don't share local DRAM */
    vme_lcsr->vme_bus_requester = 0x0;
    /* release bus */
  }

  vme_lcsr->master_address_modifier = 0;
  /* Automatically set the address modifier */
  vme_lcsr->master_configuration = 1;
  /* Disable D32 transfers : they don't work on my VMEbus rack */

  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.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;

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

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

  rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
}