Subversion Repositories openrisc_2011-10-31

/* frv device support

   Copyright (C) 1998, 1999, 2007, 2008 Free Software Foundation, Inc.

   Contributed by Red Hat.

This file is part of the GNU simulators.

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/>.  */

/* ??? All of this is just to get something going.  wip!  */

#include "sim-main.h"

#ifdef HAVE_DV_SOCKSER

#include "dv-sockser.h"

#endif

device frv_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

  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;

#if 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, ...) {}