Subversion Repositories openrisc_2011-10-31

/*

 *  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: bspstart.c,v 1.2 2001-09-27 11:59:57 chris Exp $

 */

#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 )

{

  /* set node number in SQSIO4 CTL REG */

  *((rtems_unsigned32 *)0xc00000b0) =

       (Configuration.User_multiprocessing_table) ?

          Configuration.User_multiprocessing_table->node : 0;

  Prcb    = get_prcb();

  Ctl_tbl = Prcb->control_tbl;

  /* following configures the data breakpoint (which must be set

   *   before this is executed) to break on writes only.

   */

  Ctl_tbl->bpcon &= ~0x00cc0000;

  i960_reload_ctl_group( 6 );

  /*  bit 31 of the Register Cache Control can be set to

   *  enable an alternative caching algorithm.  It does

   *  not appear to help RTEMS.

   */

  /* Configure Number of Register Caches */

  Prcb->reg_cache_cfg = 8;

  i960_soft_reset( Prcb );

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

  Cpu_table.postdriver_hook = bsp_postdriver_hook;

  Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;

  Cpu_table.Prcb = Prcb;

  BSP_Configuration.work_space_start = (void *)

     (RAM_END - BSP_Configuration.work_space_size);

}