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/*=================================================================

//

//        slebstak.c

//

//        SPARClite HAL exception and register manipulation test

//

//==========================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later

// version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License

// along with eCos; if not, write to the Free Software Foundation, Inc.,

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

//

// As a special exception, if other files instantiate templates or use

// macros or inline functions from this file, or you compile this file

// and link it with other works to produce a work based on this file,

// this file does not by itself cause the resulting work to be covered by

// the GNU General Public License. However the source code for this file

// must still be made available in accordance with section (3) of the GNU

// General Public License v2.

//

// This exception does not invalidate any other reasons why a work based

// on this file might be covered by the GNU General Public License.

// -------------------------------------------

// ####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     dsm

// Contributors:    dsm, nickg

// Date:          1998-06-18

//####DESCRIPTIONEND####

*/

#include <pkgconf/system.h>

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>

#include <cyg/infra/cyg_ass.h>

#include <cyg/infra/testcase.h>

#include <cyg/hal/hal_arch.h>

#include <cyg/hal/hal_intr.h>

#include <cyg/hal/hal_diag.h>

#include <cyg/hal/hal_clock.h>

#include <pkgconf/infra.h>

#include <cyg/infra/diag.h>

// -------------------------------------------------------------------------

cyg_uint32 fact( cyg_uint32 arg )

{

    cyg_uint32 ret = (arg < 2) ? 1 : (arg * fact( arg - 1 ));

    return ret;

}

// -------------------------------------------------------------------------

int i, j=0, bit;

int level[8];

#define led (*(volatile char *)(0x02000003))

int lval = 0;

int sequence[] = { 0, 0, 1, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7, 6, 6, 5, 4, 3, 2, 1, 1, 0, 0,

 };

int nseq=(sizeof(sequence)/sizeof(sequence[0])-1);

void set_leds( void ) // and decay them too

{

  int i, j;

  for (j=0; j<50; j++)

    {

      for (i=0; i<256; i++)

        {

          lval = 0;

          for (bit=0; bit<8; bit++)

            if (i >= level[bit])

              lval |= 1<<bit;

          led = lval;

        }

#define N 1

    for (i=0; i<8; i++)

      if (level[i] != 256)

        {

          if (level[i] > 0)

            level[i] -= N;

          else

            level[i] = 0;

        }

    }

}

void start( void )

{

    int op = 0;

    int bright = 255;

    cyg_uint32 f0;

#if 0

    while ( 1 ) {

#else

    int z;

    for ( z = 0; z < 100; z++ ) {

#endif

        f0 = 1;

        for (op=0; op<nseq; op++) {

            HAL_DIAG_WRITE_CHAR( 'A' + op );

            level[sequence[op]] = bright;

            set_leds();

            if ( op ) {

                int f1 = fact( op );

                f0 *= op;

                if ( f0 != f1 ) {

                    while ( 1 ) {

                        led = op;

                        CYG_TEST_FAIL_EXIT( "Factorial wrong" );

                    }

                }

            }

        }

        HAL_DIAG_WRITE_CHAR( '\n' );

        HAL_DIAG_WRITE_CHAR( '\r' );

        CYG_TEST_PASS( "Stack thrashed OK" );

    }

}

// -------------------------------------------------------------------------

externC void

#ifdef CYGPKG_KERNEL

cyg_user_start( void )

#else

cyg_start( void )

#endif

{

    CYG_TEST_INIT();

    CYG_TEST_INFO( "cyg_user_start()" );

    HAL_ENABLE_INTERRUPTS();

    start();

    CYG_TEST_EXIT( "LED bibbling and stack thrashing test" );

}

// -------------------------------------------------------------------------

/* EOF slebstak.c */