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.

 *

 *  Called by RTEMS::RTEMS constructor in startup-ctor.cc

 *

 *  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 12:01:15 chris Exp $

 */

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <bsp.h>

#include <libcsupport.h>

#include <rtems/libio.h>

extern rtems_configuration_table  Configuration;

/*

 * A copy of the configuration table from the application

 * with some changes applied to it.

 */

rtems_configuration_table    BSP_Configuration;

rtems_multiprocessing_table  BSP_Multiprocessing;

rtems_cpu_table              Cpu_table;

rtems_unsigned32             bsp_isr_level;

rtems_unsigned32             Heap_size;

int                          rtems_argc;

char                       **rtems_argv;

/*

 * May be overridden by RTEMS_WORKSPACE_SIZE and RTEMS_HEAPSPACE_SIZE

 * environment variables; see below.

 */

#define DEFAULT_WORKSPACE_SIZE (WORKSPACE_MB * (1024 * 1024))

#define DEFAULT_HEAPSPACE_SIZE (HEAPSPACE_MB * (1024 * 1024))

/*

 * Amount to increment itimer by each pass

 * It is a variable instead of a #define to allow the 'looptest'

 * script to bump it without recompiling rtems

 */

rtems_unsigned32 CPU_CLICKS_PER_TICK;

/*

 *  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)

{

    void *heap_start;

    if (getenv("RTEMS_HEAPSPACE_SIZE"))

        Heap_size = strtol(getenv("RTEMS_HEAPSPACE_SIZE"), 0, 0);

    else

        Heap_size = DEFAULT_HEAPSPACE_SIZE;

    heap_start = 0;

    bsp_libc_init((void *)heap_start, Heap_size, 1024 * 1024);

#ifdef RTEMS_DEBUG

    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );

#endif

    /*

     * Dump malloc stats on exit...

     */

#if defined(RTEMS_DEBUG)

  atexit(malloc_dump);

#endif

}

/*

 *  DO NOT Use the shared bsp_postdriver_hook() implementation

 */

void bsp_postdriver_hook(void)

{

  return;

}

/*

 *  bsp_start

 *

 *  This routine does the bulk of the system initialization.

 */

void bsp_start(void)

{

    unsigned32 workspace_ptr;

    /*

     *  Copy the table (normally done in shared main).

     */

    BSP_Configuration = Configuration;

    /*

     *  If the node number is -1 then the application better provide

     *  it through environment variables RTEMS_NODE.

     *  Ditto for RTEMS_MAXIMUM_NODES

     */

    if (BSP_Configuration.User_multiprocessing_table) {

        char *p;

        /* make a copy for possible editing */

        BSP_Multiprocessing = *BSP_Configuration.User_multiprocessing_table;

        BSP_Configuration.User_multiprocessing_table = &BSP_Multiprocessing;

        if (BSP_Multiprocessing.node == -1)

        {

            p = getenv("RTEMS_NODE");

            BSP_Multiprocessing.node = p ? atoi(p) : 1;

        }

        /* If needed provide maximum_nodes also */

        if (BSP_Multiprocessing.maximum_nodes == -1)

        {

            p = getenv("RTEMS_MAXIMUM_NODES");

            BSP_Multiprocessing.maximum_nodes = p ? atoi(p) : 1;

        }

    }

    /*

     * Set cpu_number to accurately reflect our cpu number

     */

    if (BSP_Configuration.User_multiprocessing_table)

        cpu_number = BSP_Configuration.User_multiprocessing_table->node - 1;

    else

        cpu_number = 0;

    if (getenv("RTEMS_WORKSPACE_SIZE"))

        BSP_Configuration.work_space_size =

           strtol(getenv("RTEMS_WORKSPACE_SIZE"), 0, 0);

    else

        BSP_Configuration.work_space_size = DEFAULT_WORKSPACE_SIZE;

    /*

     * Allocate workspace memory, ensuring it is properly aligned

     */

    workspace_ptr =

      (unsigned32) sbrk(BSP_Configuration.work_space_size + CPU_ALIGNMENT);

    workspace_ptr += CPU_ALIGNMENT - 1;

    workspace_ptr &= ~(CPU_ALIGNMENT - 1);

    BSP_Configuration.work_space_start = (void *) workspace_ptr;

    /*

     * Set up our hooks

     * Make sure libc_init is done before drivers init'd so that

     * they can use atexit()

     */

    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 */

    /*

     *  Don't zero out the workspace since it is in the BSS under UNIX.

     */

    Cpu_table.do_zero_of_workspace = FALSE;

    /*

     * XXX; interrupt stack not currently used, so this doesn't matter

     */

    Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;

    Cpu_table.extra_mpci_receive_server_stack = 0;

    /*

     * Add 1 extension for MPCI_fatal

     */

    if (BSP_Configuration.User_multiprocessing_table)

        BSP_Configuration.maximum_extensions++;

    CPU_CLICKS_PER_TICK = 1;

    /*

     *  Start most of RTEMS

     *  main() will start the rest

     */

    bsp_isr_level = rtems_initialize_executive_early(

      &BSP_Configuration,

      &Cpu_table

    );

}