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/*

 *  This set of routines starts the application.  It includes application,

 *  board, and monitor specific initialization and configuration.

 *  The generic CPU dependent initialization has been performed

 *  before any of these are invoked.

 *

 *  COPYRIGHT (c) 1989-1999.

 *  On-Line Applications Research Corporation (OAR).

 *  All rights 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.

 *

 *  bspstart.c,v 1.13 2002/04/18 20:55:04 joel Exp

 */

#include <string.h>

#include <fcntl.h>

#include <bsp.h>

#include <rtems/libio.h>

#include <rtems/libcsupport.h>

#include <rtems/bspIo.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;

rtems_unsigned32  bsp_isr_level;

/*

 *  Tells us where to put the workspace in case remote debugger is present.

 */

#if 0

extern rtems_unsigned32  rdb_start;

#endif

/*

 *  Use the shared implementations of the following routines

 */

void bsp_postdriver_hook(void);

void bsp_libc_init( void *, unsigned32, int );

/*

 *  bsp_pretasking_hook

 *

 *  BSP pretasking hook.  Called just before drivers are initialized.

 *  Used to setup libc and install any BSP extensions.

 */

void bsp_pretasking_hook(void)

{

  extern int end;

  rtems_unsigned32 heap_start;

  rtems_unsigned32 heap_size;

  heap_start = (rtems_unsigned32) &end;

  if (heap_start & (CPU_ALIGNMENT-1))

    heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);

  heap_size = BSP_Configuration.work_space_start - (void *)&end;

  heap_size &= 0xfffffff0;  /* keep it as a multiple of 16 bytes */

  bsp_libc_init((void *) heap_start, heap_size, 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 )

{

  unsigned char *work_space_start;

#if 0

  /*

   * Set MSR to show vectors at 0 XXX

   */

  _CPU_MSR_Value( msr_value );

  msr_value &= ~PPC_MSR_EP;

  _CPU_MSR_SET( msr_value );

#endif

  /*

   * Set up our hooks

   * Make sure libc_init is done before drivers initialized so that

   * they can use atexit()

   */

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

  Cpu_table.postdriver_hook = bsp_postdriver_hook;

  /*

   *  Is this true?

   *

   *  PSIM does zero out memory BUT only when IT begins execution.  Thus

   *  if we want to have a clean slate in the workspace each time we

   *  begin execution of OUR application, then we must zero the workspace.

   *

   *  It is true that it takes simulated time to clear the memory.

   */

  Cpu_table.do_zero_of_workspace = FALSE;

  Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;

  /*

   *  The monitor likes the exception table to be at 0x0.

   */

  Cpu_table.exceptions_in_RAM = TRUE;

  BSP_Configuration.work_space_size += 1024;

  work_space_start =

    (unsigned char *)&RAM_END - BSP_Configuration.work_space_size;

  if ( work_space_start <= (unsigned char *)&end ) {

    printk( "bspstart: Not enough RAM!!!\n" );

    bsp_cleanup();

  }

  BSP_Configuration.work_space_start = work_space_start;

}