Subversion Repositories openrisc

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

//

//      hal_diag.c

//

//      HAL diagnostic output code

//

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

//####ECOSGPLCOPYRIGHTBEGIN####

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

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

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, 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.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 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.

//

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

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

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

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

//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):   nickg

// Contributors:        nickg, dmoseley

// Date:        1998-03-02

// Purpose:     HAL diagnostic output

// Description: Implementations of HAL diagnostic output support.

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>         // base types

#include <cyg/infra/cyg_trac.h>         // tracing macros

#include <cyg/infra/cyg_ass.h>          // assertion macros

#include <cyg/hal/hal_arch.h>

#include <cyg/hal/hal_diag.h>

#include <cyg/hal/hal_intr.h>

#include <cyg/hal/hal_io.h>

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

// Select which diag channels to use

//#define CYG_KERNEL_DIAG_LCD

#define CYG_KERNEL_DIAG_SERIAL

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

void hal_diag_led(int x)

{

}

externC void diag_write_string (const char*);

#ifdef CYG_KERNEL_DIAG_SERIAL

extern void cyg_hal_plf_comms_init(void);

extern void cyg_hal_plf_serial_putc(void*, cyg_uint8);

extern cyg_uint8 cyg_hal_plf_serial_getc(void*);

#endif

void hal_diag_init(void)

{

#if defined(CYGSEM_HAL_ROM_MONITOR) && !defined(CYG_KERNEL_DIAG_SERIAL)

  // It's handy to have the LCD initialized at reset when using it

  // for debugging output.

  // The serial port likely doesn't work yet.  Let's wait.

  diag_write_string ("eCos ROM   " __TIME__ "\n");

  diag_write_string (__DATE__ "\n");

#endif

#if defined(CYG_KERNEL_DIAG_SERIAL)

  cyg_hal_plf_comms_init();

#endif

}

#if defined(CYG_KERNEL_DIAG_LCD)

static void hal_diag_clear_lcd(void)

{

  volatile int i = 0x20000;

  while (--i) ;

  HAL_WRITE_UINT32(HAL_DISPLAY_ASCIIPOS0, ' ');

  HAL_WRITE_UINT32(HAL_DISPLAY_ASCIIPOS1, ' ');

  HAL_WRITE_UINT32(HAL_DISPLAY_ASCIIPOS2, ' ');

  HAL_WRITE_UINT32(HAL_DISPLAY_ASCIIPOS3, ' ');

  HAL_WRITE_UINT32(HAL_DISPLAY_ASCIIPOS4, ' ');

  HAL_WRITE_UINT32(HAL_DISPLAY_ASCIIPOS5, ' ');

  HAL_WRITE_UINT32(HAL_DISPLAY_ASCIIPOS6, ' ');

  HAL_WRITE_UINT32(HAL_DISPLAY_ASCIIPOS7, ' ');

}

#endif /* defined(CYG_KERNEL_DIAG_LCD) */

void hal_diag_write_char(char c)

{

#if defined(CYG_KERNEL_DIAG_LCD)

  static volatile CYG_WORD* reg = HAL_DISPLAY_ASCIIPOS0;

#endif

  unsigned long __state;

  HAL_DISABLE_INTERRUPTS(__state);

  if(c == '\n')

    {

#if defined(CYG_KERNEL_DIAG_LCD)

      reg = HAL_DISPLAY_ASCIIPOS0;

      hal_diag_clear_lcd();

#endif

#if defined (CYG_KERNEL_DIAG_SERIAL)

      cyg_hal_plf_serial_putc(NULL, '\r');

      cyg_hal_plf_serial_putc(NULL, '\n');

#endif

    }

  else if (c == '\r')

    {

      // Ignore '\r'

    }

  else

    {

#if defined(CYG_KERNEL_DIAG_LCD)

      if (reg == HAL_DISPLAY_ASCIIPOS0)

        hal_diag_clear_lcd();

      HAL_WRITE_UINT32(reg, c);

      // Advance to next LED position.

      if (reg == HAL_DISPLAY_ASCIIPOS0)

        reg = HAL_DISPLAY_ASCIIPOS1;

      else if (reg == HAL_DISPLAY_ASCIIPOS1)

        reg = HAL_DISPLAY_ASCIIPOS2;

      else if (reg == HAL_DISPLAY_ASCIIPOS2)

        reg = HAL_DISPLAY_ASCIIPOS3;

      else if (reg == HAL_DISPLAY_ASCIIPOS3)

        reg = HAL_DISPLAY_ASCIIPOS4;

      else if (reg == HAL_DISPLAY_ASCIIPOS4)

        reg = HAL_DISPLAY_ASCIIPOS5;

      else if (reg == HAL_DISPLAY_ASCIIPOS5)

        reg = HAL_DISPLAY_ASCIIPOS6;

      else if (reg == HAL_DISPLAY_ASCIIPOS6)

        reg = HAL_DISPLAY_ASCIIPOS7;

      else // reg == HAL_DISPLAY_ASCIIPOS7 or UNKNOWN

        reg = HAL_DISPLAY_ASCIIPOS0;

#endif

#if defined(CYG_KERNEL_DIAG_SERIAL)

      cyg_hal_plf_serial_putc(NULL, c);

#endif

    }

  HAL_RESTORE_INTERRUPTS(__state);

}

void hal_diag_read_char(char* c)

{

  *c = cyg_hal_plf_serial_getc(NULL);

}

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

/* End of hal_diag.c */