sim/cris/devices.c

/* CRIS device support
   Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
   Free Software Foundation, Inc.
   Contributed by Axis Communications.

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/>.  */

/* Based on the i960 devices.c (for the purposes, the same as all the
   others).  */

#include "sim-main.h"

#ifdef HAVE_DV_SOCKSER
#include "dv-sockser.h"
#endif

#include "hw-device.h"

/* Placeholder definition.  */
struct _device { char dummy; } cris_devices;

void
device_error (device *me ATTRIBUTE_UNUSED,
	      char *message ATTRIBUTE_UNUSED,
	      ...)
{
  abort ();
}

int
device_io_read_buffer (device *me ATTRIBUTE_UNUSED,
		       void *source ATTRIBUTE_UNUSED,
		       int space ATTRIBUTE_UNUSED,
		       address_word addr ATTRIBUTE_UNUSED,
		       unsigned nr_bytes ATTRIBUTE_UNUSED,
		       SIM_DESC sd ATTRIBUTE_UNUSED,
		       SIM_CPU *cpu ATTRIBUTE_UNUSED,
		       sim_cia cia ATTRIBUTE_UNUSED)
{
#if WITH_HW
  return hw_io_read_buffer ((struct hw *) me, source, space, addr, nr_bytes);
#else
  abort ();
#endif
}

int
device_io_write_buffer (device *me ATTRIBUTE_UNUSED,
			const void *source,
			int space ATTRIBUTE_UNUSED,
			address_word addr, unsigned nr_bytes,
			SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)
{
  static const unsigned char ok[] = { 4, 0, 0, 0x90};
  static const unsigned char bad[] = { 8, 0, 0, 0x90};

  if (cris_have_900000xxif)
    {
      if (addr == 0x90000004 && memcmp (source, ok, sizeof ok) == 0)
	return cris_break_13_handler (cpu, 1, 0, 0, 0, 0, 0, 0, cia);
      else if (addr == 0x90000008
	       && memcmp (source, bad, sizeof bad) == 0)
	return cris_break_13_handler (cpu, 1, 34, 0, 0, 0, 0, 0, cia);
    }
#if WITH_HW
  else
    return hw_io_write_buffer ((struct hw *) me, source, space, addr, nr_bytes);
#endif

  /* If it wasn't one of those, send an invalid-memory signal.  */
  sim_core_signal (sd, cpu, cia, 0, nr_bytes, addr,
		   write_transfer, sim_core_unmapped_signal);

  return 0;
}