Subversion Repositories openrisc_2011-10-31

/*

 *  A simple main which can be used on any embedded target.

 *

 *  This style of initialization insures that the C++ global

 *  constructors are executed after RTEMS is initialized.

 *

 *  Thanks to Chris Johns <cjohns@plessey.com.au> for this idea.

 *

 *  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: bootcard.c,v 1.2 2001-09-27 12:01:12 chris Exp $

 */

#include <bsp.h>

#ifdef USE_INIT_FINI 

#include <stdlib.h> /* for atexit() */

#endif

extern void bsp_start( void );

extern void bsp_cleanup( void );

extern rtems_configuration_table  Configuration;

extern rtems_configuration_table  BSP_Configuration;

extern rtems_cpu_table            Cpu_table;

rtems_api_configuration_table BSP_RTEMS_Configuration;

#ifdef RTEMS_POSIX_API

posix_api_configuration_table BSP_POSIX_Configuration;

#endif

/* Initialize C++ global Ctor/Dtor and initializes exception handling. */

#if defined(USE_INIT_FINI)

extern void _fini( void );

extern void _init( void );

#endif

rtems_interrupt_level bsp_isr_level;

/*

 *  Since there is a forward reference

 */

int main(int argc, char **argv, char **envp);

int boot_card(int argc, char **argv, char **envp)

{

  int    status;

  static char  *argv_pointer = NULL;

  static char  *envp_pointer = NULL;

  char **argv_p = &argv_pointer;

  char **envp_p = &envp_pointer;

  /*

   *  Set things up so main is called with real pointers for argv and envp.

   *  If the BSP has passed us something useful, then pass it on.

   */

  if ( argv )

    argv_p = argv;

  if ( envp )

    envp_p = envp;

  /*

   *  Set default values for the CPU Table fields all ports must have.

   *  These values can be overridden in bsp_start() but they are

   *  right most of the time.

   */

  Cpu_table.pretasking_hook                 = NULL;

  Cpu_table.predriver_hook                  = NULL;

  Cpu_table.postdriver_hook                 = NULL;

  Cpu_table.idle_task                       = NULL;

  Cpu_table.do_zero_of_workspace            = TRUE;

  Cpu_table.interrupt_stack_size            = RTEMS_MINIMUM_STACK_SIZE;

  Cpu_table.extra_mpci_receive_server_stack = 0;

  Cpu_table.stack_allocate_hook             = NULL;

  Cpu_table.stack_free_hook                 = NULL;

  /*

   *  Copy the configuration table so we and the BSP wants to change it.

   */

  BSP_Configuration       = Configuration;

  BSP_RTEMS_Configuration = *Configuration.RTEMS_api_configuration;

  BSP_Configuration.RTEMS_api_configuration = &BSP_RTEMS_Configuration;

#ifdef RTEMS_POSIX_API

  BSP_POSIX_Configuration = *Configuration.POSIX_api_configuration;

  BSP_Configuration.POSIX_api_configuration = &BSP_POSIX_Configuration;

#endif

  /*

   *  The atexit hook will be before the static destructor list's entry

   *  point.

   */

  bsp_start();

  /*

   *  Initialize RTEMS but do NOT start multitasking.

   */

  bsp_isr_level =

    rtems_initialize_executive_early( &BSP_Configuration, &Cpu_table );

  /*

   *  Call main() and get the global constructors invoked if there

   *  are any.

   */

#ifdef USE_INIT_FINI 

   atexit( _fini );

   _init();

#endif

  status = main( argc, argv_p, envp_p );

  /*

   *  Perform any BSP specific shutdown actions.

   */

  bsp_cleanup();

  /*

   *  Now return to the start code.

   */

  return status;

}