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/*  This file is part of the program psim.

    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>

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

    */

#ifndef _OS_EMUL_C_

#define _OS_EMUL_C_

#include "cpu.h"

#include "idecode.h"

#include "os_emul.h"

#include "emul_generic.h"

#include "emul_netbsd.h"

#include "emul_unix.h"

#include "emul_chirp.h"

#include "emul_bugapi.h"

static const os_emul *(os_emulations[]) = {

  &emul_chirp,

  &emul_bugapi,

  &emul_netbsd,

  &emul_solaris,

  &emul_linux,

};

INLINE_OS_EMUL\

(os_emul *)

os_emul_create(const char *file_name,

               device *root)

{

  const char *emulation_name = NULL;

  bfd *image;

  os_emul *chosen_emulation = NULL;

  bfd_init(); /* would never hurt */

  /* open the file */

  image = bfd_openr(file_name, NULL);

  if (image == NULL) {

    bfd_perror(file_name);

    error("nothing loaded\n");

  }

  /* check it is an executable */

  if (!bfd_check_format(image, bfd_object)) {

    TRACE(trace_tbd,

          ("FIXME - should check more than just bfd_check_format\n"));

    TRACE(trace_os_emul,

          ("%s not an executable, assumeing a device file\n", file_name));

    bfd_close(image);

    image = NULL;

  }

  /* if a device file, load that before trying the emulations on */

  if (image == NULL) {

    psim_merge_device_file(root, file_name);

  }

  /* see if the device tree already specifies the required emulation */

  if (tree_find_property(root, "/openprom/options/os-emul") != NULL)

    emulation_name =

      tree_find_string_property(root, "/openprom/options/os-emul");

  else

    emulation_name = NULL;

  /* go through each emulation to see if they reconize it. FIXME -

     should have some sort of imported table from a separate file */

  {

    os_emul_data *emul_data;

    const os_emul **possible_emulation;

    chosen_emulation = NULL;

    for (possible_emulation = os_emulations, emul_data = NULL;

         *possible_emulation != NULL && emul_data == NULL;

         possible_emulation++) {

      emul_data = (*possible_emulation)->create(root,

                                                image,

                                                emulation_name);

      if (emul_data != NULL) {

        chosen_emulation = ZALLOC(os_emul);

        *chosen_emulation = **possible_emulation;

        chosen_emulation->data = emul_data;

      }

    }

  }

  /* clean up */

  if (image != NULL)

    bfd_close(image);

  return chosen_emulation;

}

INLINE_OS_EMUL\

(void)

os_emul_init(os_emul *emulation,

             int nr_cpus)

{

  if (emulation != (os_emul*)0)

    emulation->init(emulation->data, nr_cpus);

}

INLINE_OS_EMUL\

(void)

os_emul_system_call(cpu *processor,

                    unsigned_word cia)

{

  os_emul *emulation = cpu_os_emulation(processor);

  if (emulation != (os_emul*)0 && emulation->system_call != 0)

    emulation->system_call(processor, cia, emulation->data);

  else

    error("System call emulation not available\n");

}

INLINE_OS_EMUL\

(int)

os_emul_instruction_call(cpu *processor,

                         unsigned_word cia,

                         unsigned_word ra)

{

  os_emul *emulation = cpu_os_emulation(processor);

  if (emulation != (os_emul*)0 && emulation->instruction_call != 0)

    return emulation->instruction_call(processor, cia, ra, emulation->data);

  else

    return 0;

}

#endif /* _OS_EMUL_C_ */