Subversion Repositories vapi

/* gpio.c -- test for GPIO, by using VAPI

   Copyright (C) 2001, Erez Volk, erez@opencores.org

   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 2 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, write to the Free Software

   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */

#include <stdio.h>

unsigned long num_vapi_ids = 8;

#define ALL_ONES 0xFFFFFFFFLU

#define ALL_ZEROS 0x00000000LU

/* fails if x is false */

#define ASSERT(x) ((x)?1: fail (__FILE__, __LINE__))

static void fail (char *file, int line)

{

  printf( "Test failed in %s:%i\n", file, line );

  exit( 1 );

}

static void test_registers( void )

{

}

static void test_simple_io( void )

{

  unsigned i;

  unsigned long oe;

  for ( i = 1, oe = 1; i < 31; ++ i, oe = (oe << 1) | 1 ) {

    ASSERT( vapi_read() == oe );

    vapi_write( ~oe );

    ASSERT( vapi_read() == 0 );

    vapi_write( oe );

  }

}

static void test_interrupts( void )

{

  unsigned i;

  ASSERT( vapi_read() == 0x80000000 );

  for ( i = 0; i < 31; ++ i ) {

    vapi_write( 1LU << i );

    ASSERT( vapi_read() == ((i % 2) ? 0x80000000 : 0) );

  }

}

static void test_external_clock( void )

{

  unsigned i, j, edge;

  unsigned long junk = 0xdf662b5c;

  for ( edge = 0; edge < 2; ++ edge ) {

    ASSERT( vapi_read() == 0x80000000 );

    vapi_write_with_id( 2, !edge );

    for ( i = 0; i < 31; ++ i ) {

      for ( j = 0; j < 4; ++ j, junk = junk * 0xf7b1dfbd + 0x5bf9f28b )

        vapi_write( junk );

      vapi_write( 1LU << i );

      vapi_write_with_id( 2, edge );

      ASSERT( vapi_read() == ((i % 2) ? 0x80000000 : 0) );

      for ( j = 0; j < 4; ++ j, junk = junk * 0xf7b1dfbd + 0x5bf9f28b )

        vapi_write( junk );

      vapi_write_with_id( 2, !edge );

    }

  }

}

static void endshake( void )

{

  ASSERT( vapi_read() == 0x12340000 );

  vapi_write( 0x00005678 );

  ASSERT( vapi_read() == 0xDeadDead );

}

int vapi_main( void )

{

  test_registers();

  test_simple_io();

  test_interrupts();

  test_external_clock();

  endshake();

  return 0;

}