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/* m32r device support

   Copyright (C) 1997, 1998, 2007, 2008 Free Software Foundation, Inc.

   Contributed by Cygnus Solutions.

This file is part of GDB, the GNU debugger.

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/>.  */

#include "sim-main.h"

#ifdef HAVE_DV_SOCKSER

#include "dv-sockser.h"

#endif

/* Handling the MSPR register is done by creating a device in the core

   mapping that winds up here.  */

device m32r_devices;

int

device_io_read_buffer (device *me, void *source, int space,

                       address_word addr, unsigned nr_bytes,

                       SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)

{

  if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)

    return nr_bytes;

#ifdef HAVE_DV_SOCKSER

  if (addr == UART_INCHAR_ADDR)

    {

      int c = dv_sockser_read (sd);

      if (c == -1)

        return 0;

      *(char *) source = c;

      return 1;

    }

  if (addr == UART_STATUS_ADDR)

    {

      int status = dv_sockser_status (sd);

      unsigned char *p = source;

      p[0] = 0;

      p[1] = (((status & DV_SOCKSER_INPUT_EMPTY)

#ifdef UART_INPUT_READY0

               ? UART_INPUT_READY : 0)

#else

               ? 0 : UART_INPUT_READY)

#endif

              + ((status & DV_SOCKSER_OUTPUT_EMPTY) ? UART_OUTPUT_READY : 0));

      return 2;

    }

#endif

  return nr_bytes;

}

int

device_io_write_buffer (device *me, const void *source, int space,

                        address_word addr, unsigned nr_bytes,

                        SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)

{

#if WITH_SCACHE

  /* MSPR support is deprecated but is kept in for upward compatibility

     with existing overlay support.  */

  if (addr == MSPR_ADDR)

    {

      if ((*(const char *) source & MSPR_PURGE) != 0)

        scache_flush (sd);

      return nr_bytes;

    }

  if (addr == MCCR_ADDR)

    {

      if ((*(const char *) source & MCCR_CP) != 0)

        scache_flush (sd);

      return nr_bytes;

    }

#endif

  if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)

    return nr_bytes;

#ifdef HAVE_DV_SOCKSER

  if (addr == UART_OUTCHAR_ADDR)

    {

      int rc = dv_sockser_write (sd, *(char *) source);

      return rc == 1;

    }

#endif

  return nr_bytes;

}

void

device_error (device *me, char *message, ...)

{

}