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/* lib-iftest.c. Test of Or1ksim library interface functions.

   Copyright (C) 1999-2006 OpenCores

   Copyright (C) 2010 Embecosm Limited

   Contributors various OpenCores participants

   Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>

   This file is part of OpenRISC 1000 Architectural Simulator.

   This program 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 3 of the License, or (at your option)

   any later version.

   This program 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 this program.  If not, see <http:  www.gnu.org/licenses/>.  */

/* ----------------------------------------------------------------------------

   This code is commented throughout for use with Doxygen.

   --------------------------------------------------------------------------*/

#include <math.h>

#include <stdlib.h>

#include <stdio.h>

#include "or1ksim.h"

/* --------------------------------------------------------------------------*/

/*!Main program

   Build an or1ksim program using the library which loads a program and config

   from the command line. Usage:

   lib-iftest <config-file> <image> <duration_ms>

   Run that test for a <duration_ms> milliseconds of simulated time. The test

   the various interface functions.

   @param[in] argc  Number of elements in argv

   @param[in] argv  Vector of program name and arguments

   @return  Return code for the program.                                     */

/* --------------------------------------------------------------------------*/

int

main (int   argc,

      char *argv[])

{

  /* Parse args */

  if (4 != argc)

    {

      fprintf (stderr,

               "usage: lib-iftest <config-file> <image> <duration_ms>\n");

      return  1;

    }

  int     duration_ms = atoi (argv[3]);

  double  duration    = (double) duration_ms / 1.0e3;

  if (duration_ms <= 0)

    {

      fprintf (stderr, "ERROR. Duration must be positive number of ms\n");

      return  1;

    }

  /* Dummy argv array to pass arguments to or1ksim_init. Varies depending on

     whether an image file is specified. */

  int   dummy_argc;

  char *dummy_argv[5];

  dummy_argv[0] = "libsim";

  dummy_argv[1] = "-q";

  dummy_argv[2] = "-f";

  dummy_argv[3] = argv[1];

  dummy_argv[4] = argv[2];

  dummy_argc = 5;

  /* Put the initialization message afterwards, or it will get swamped by the

     Or1ksim header. */

  if (0 == or1ksim_init (dummy_argc, dummy_argv, NULL, NULL, NULL))

    {

      printf ("Initalization succeeded.\n");

    }

  else

    {

      printf ("Initalization failed.\n");

      return  1;

    }

  /* Test of running */

  printf ("Running code...");

  switch (or1ksim_run (duration))

    {

    case OR1KSIM_RC_OK:    printf ("done.\n");           break;

    case OR1KSIM_RC_BRKPT: printf ("hit breakpoint.\n"); break;

    default:               printf ("failed.\n");         return  1;

    }

  /* Test of timing. Set a time point, run for the duration, then check the

     timing matches. */

  or1ksim_set_time_point ();

  printf ("Set time point.\n");

  printf ("Running code...");

  switch (or1ksim_run (duration))

    {

    case OR1KSIM_RC_OK:    printf ("done.\n");           break;

    case OR1KSIM_RC_BRKPT: printf ("hit breakpoint.\n"); break;

    default:               printf ("failed.\n");         return  1;

    }

  /* All done OK (within 1ps) */

  double measured_duration = or1ksim_get_time_period ();

  if (fabs (duration - measured_duration) < 1e-12)

    {

      printf ("Measured time period correctly.\n");

    }

  else

    {

      printf ("Failed. Requested period %.12f, but measured %.12f\n", duration,

              measured_duration);

      return  1;

    }

  /* Test endianness */

  if (or1ksim_is_le ())

    {

      printf ("Little endian architecture.\n");

    }

  else

    {

      printf ("Big endian architecture.\n");

    }

  /* Check for clock rate */

  unsigned long int  clock_rate = or1ksim_clock_rate ();

  if (clock_rate > 0)

    {

      printf ("Clock rate %ld Hz.\n", clock_rate);

    }

  else

    {

      printf ("Invalid clock rate %ld Hz.\n", clock_rate);

      return  1;

    }

  printf ("Test completed successfully.\n");

  return  0;

}       /* main () */