/*  This file is part of the GNU simulators.

    Copyright (C) 1994-1995,1997, 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.
 
    */


#include "sim-main.h"
#include "sim-assert.h"
#include "bfd.h"


int current_host_byte_order;
int current_target_byte_order;
int current_stdio;

/* The currently selected environment.
   This isn't used unless the choice is runtime selectable.
   The proper way to determine the currently selected environment
   is with the CURRENT_ENVIRONMENT macro.
   This is set to ALL_ENVIRONMENT to indicate none has been selected yet.  */
enum sim_environment current_environment = ALL_ENVIRONMENT;

enum sim_alignments current_alignment;

#if defined (WITH_FLOATING_POINT)
int current_floating_point;
#endif



/* map a byte order onto a textual string */

static const char *
config_byte_order_to_a (int byte_order)
{
  switch (byte_order)
    {
    case LITTLE_ENDIAN:
      return "LITTLE_ENDIAN";
    case BIG_ENDIAN:
      return "BIG_ENDIAN";
    case 0:
      return "0";
    }
  return "UNKNOWN";
}


static const char *
config_stdio_to_a (int stdio)
{
  switch (stdio)
    {
    case DONT_USE_STDIO:
      return "DONT_USE_STDIO";
    case DO_USE_STDIO:
      return "DO_USE_STDIO";
    case 0:
      return "0";
    }
  return "UNKNOWN";
}


static const char *
config_environment_to_a (enum sim_environment environment)
{
  switch (environment)
    {
    case ALL_ENVIRONMENT:
      return "ALL_ENVIRONMENT";
    case USER_ENVIRONMENT:
      return "USER_ENVIRONMENT";
    case VIRTUAL_ENVIRONMENT:
      return "VIRTUAL_ENVIRONMENT";
    case OPERATING_ENVIRONMENT:
      return "OPERATING_ENVIRONMENT";
    }
  return "UNKNOWN";
}


static const char *
config_alignment_to_a (enum sim_alignments alignment)
{
  switch (alignment)
    {
    case MIXED_ALIGNMENT:
      return "MIXED_ALIGNMENT";
    case NONSTRICT_ALIGNMENT:
      return "NONSTRICT_ALIGNMENT";
    case STRICT_ALIGNMENT:
      return "STRICT_ALIGNMENT";
    case FORCED_ALIGNMENT:
      return "FORCED_ALIGNMENT";
    }
  return "UNKNOWN";
}


#if defined (WITH_FLOATING_POINT)
static const char *
config_floating_point_to_a (int floating_point)
{
  switch (floating_point)
    {
    case SOFT_FLOATING_POINT:
      return "SOFT_FLOATING_POINT";
    case HARD_FLOATING_POINT:
      return "HARD_FLOATING_POINT";
    case 0:
      return "0";
    }
  return "UNKNOWN";
}
#endif


SIM_RC
sim_config (SIM_DESC sd)
{
  int prefered_target_byte_order;
  SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);

  /* extract all relevant information */
  if (STATE_PROG_BFD (sd) == NULL)
    prefered_target_byte_order = 0;
  else
    prefered_target_byte_order = (bfd_little_endian(STATE_PROG_BFD (sd))
				  ? LITTLE_ENDIAN
				  : BIG_ENDIAN);

  /* set the host byte order */
  current_host_byte_order = 1;
  if (*(char*)(&current_host_byte_order))
    current_host_byte_order = LITTLE_ENDIAN;
  else
    current_host_byte_order = BIG_ENDIAN;

  /* verify the host byte order */
  if (CURRENT_HOST_BYTE_ORDER != current_host_byte_order)
    {
      sim_io_eprintf (sd, "host (%s) and configured (%s) byte order in conflict",
		      config_byte_order_to_a (current_host_byte_order),
		      config_byte_order_to_a (CURRENT_HOST_BYTE_ORDER));
      return SIM_RC_FAIL;
    }


  /* set the target byte order */
#if (WITH_DEVICES)
  if (current_target_byte_order == 0)
    current_target_byte_order
      = (tree_find_boolean_property (root, "/options/little-endian?")
	 ? LITTLE_ENDIAN
	 : BIG_ENDIAN);
#endif
  if (current_target_byte_order == 0
      && prefered_target_byte_order != 0)
    current_target_byte_order = prefered_target_byte_order;
  if (current_target_byte_order == 0)
    current_target_byte_order = WITH_TARGET_BYTE_ORDER;
  if (current_target_byte_order == 0)
    current_target_byte_order = WITH_DEFAULT_TARGET_BYTE_ORDER;

  /* verify the target byte order */
  if (CURRENT_TARGET_BYTE_ORDER == 0)
    {
      sim_io_eprintf (sd, "Target byte order unspecified\n");
      return SIM_RC_FAIL;
    }
  if (CURRENT_TARGET_BYTE_ORDER != current_target_byte_order)
    sim_io_eprintf (sd, "Target (%s) and configured (%s) byte order in conflict\n",
		  config_byte_order_to_a (current_target_byte_order),
		  config_byte_order_to_a (CURRENT_TARGET_BYTE_ORDER));
  if (prefered_target_byte_order != 0
      && CURRENT_TARGET_BYTE_ORDER != prefered_target_byte_order)
    sim_io_eprintf (sd, "Target (%s) and specified (%s) byte order in conflict\n",
		  config_byte_order_to_a (CURRENT_TARGET_BYTE_ORDER),
		  config_byte_order_to_a (prefered_target_byte_order));


  /* set the stdio */
  if (current_stdio == 0)
    current_stdio = WITH_STDIO;
  if (current_stdio == 0)
    current_stdio = DO_USE_STDIO;

  /* verify the stdio */
  if (CURRENT_STDIO == 0)
    {
      sim_io_eprintf (sd, "Target standard IO unspecified\n");
      return SIM_RC_FAIL;
    }
  if (CURRENT_STDIO != current_stdio)
    {
      sim_io_eprintf (sd, "Target (%s) and configured (%s) standard IO in conflict\n",
		      config_stdio_to_a (CURRENT_STDIO),
		      config_stdio_to_a (current_stdio));
      return SIM_RC_FAIL;
    }
  
  
  /* check the value of MSB */
  if (WITH_TARGET_WORD_MSB != 0
      && WITH_TARGET_WORD_MSB != (WITH_TARGET_WORD_BITSIZE - 1))
    {
      sim_io_eprintf (sd, "Target bitsize (%d) contradicts target most significant bit (%d)\n",
		      WITH_TARGET_WORD_BITSIZE, WITH_TARGET_WORD_MSB);
      return SIM_RC_FAIL;
    }
  
  
  /* set the environment */
#if (WITH_DEVICES)
  if (current_environment == ALL_ENVIRONMENT)
    {
      const char *env =
	tree_find_string_property(root, "/openprom/options/env");
      current_environment = ((strcmp(env, "user") == 0
			      || strcmp(env, "uea") == 0)
			     ? USER_ENVIRONMENT
			     : (strcmp(env, "virtual") == 0
				|| strcmp(env, "vea") == 0)
			     ? VIRTUAL_ENVIRONMENT
			     : (strcmp(env, "operating") == 0
				|| strcmp(env, "oea") == 0)
			     ? OPERATING_ENVIRONMENT
			     : ALL_ENVIRONMENT);
    }
#endif
  if (current_environment == ALL_ENVIRONMENT)
    current_environment = DEFAULT_ENVIRONMENT;
  
  
  /* set the alignment */
#if defined (WITH_DEVICES)
  if (current_alignment == 0)
    current_alignment =
      (tree_find_boolean_property(root, "/openprom/options/strict-alignment?")
       ? STRICT_ALIGNMENT
       : NONSTRICT_ALIGNMENT);
#endif
  if (current_alignment == 0)
    current_alignment = WITH_ALIGNMENT;
  if (current_alignment == 0)
    current_alignment = WITH_DEFAULT_ALIGNMENT;
  
  /* verify the alignment */
  if (CURRENT_ALIGNMENT == 0)
    {
      sim_io_eprintf (sd, "Target alignment unspecified\n");
      return SIM_RC_FAIL;
    }
  if (CURRENT_ALIGNMENT != current_alignment)
    {
      sim_io_eprintf (sd, "Target (%s) and configured (%s) alignment in conflict\n",
		      config_alignment_to_a (CURRENT_ALIGNMENT),
		      config_alignment_to_a (current_alignment));
      return SIM_RC_FAIL;
    }
  
#if defined (WITH_FLOATING_POINT)
  
  /* set the floating point */
  if (current_floating_point == 0)
    current_floating_point = WITH_FLOATING_POINT;
  
  /* verify the floating point */
  if (CURRENT_FLOATING_POINT == 0)
    {
      sim_io_eprintf (sd, "Target floating-point unspecified\n");
      return SIM_RC_FAIL;
    }
  if (CURRENT_FLOATING_POINT != current_floating_point)
    {
      sim_io_eprintf (sd, "Target (%s) and configured (%s) floating-point in conflict\n",
		      config_alignment_to_a (CURRENT_FLOATING_POINT),
		      config_alignment_to_a (current_floating_point));
      return SIM_RC_FAIL;
    }
  
#endif
  return SIM_RC_OK;
}


void
print_sim_config (SIM_DESC sd)
{
#if defined (__GNUC__) && defined (__VERSION__)
  sim_io_printf (sd, "Compiled by GCC %s on %s %s\n",
			  __VERSION__, __DATE__, __TIME__);
#else
  sim_io_printf (sd, "Compiled on %s %s\n", __DATE__, __TIME__);
#endif

  sim_io_printf (sd, "WITH_TARGET_BYTE_ORDER   = %s\n",
		 config_byte_order_to_a (WITH_TARGET_BYTE_ORDER));

  sim_io_printf (sd, "WITH_DEFAULT_TARGET_BYTE_ORDER   = %s\n",
		 config_byte_order_to_a (WITH_DEFAULT_TARGET_BYTE_ORDER));

  sim_io_printf (sd, "WITH_HOST_BYTE_ORDER     = %s\n",
		 config_byte_order_to_a (WITH_HOST_BYTE_ORDER));

  sim_io_printf (sd, "WITH_STDIO               = %s\n",
		 config_stdio_to_a (WITH_STDIO));

  sim_io_printf (sd, "WITH_TARGET_WORD_BITSIZE = %d\n",
               WITH_TARGET_WORD_BITSIZE);

  sim_io_printf (sd, "WITH_TARGET_WORD_MSB     = %d\n",
               WITH_TARGET_WORD_MSB);

  sim_io_printf (sd, "WITH_ENVIRONMENT = %s\n",
		 config_environment_to_a (WITH_ENVIRONMENT));

  sim_io_printf (sd, "WITH_ALIGNMENT = %s\n",
		 config_alignment_to_a (WITH_ALIGNMENT));

#if defined (WITH_DEFAULT_ALIGNMENT)
  sim_io_printf (sd, "WITH_DEFAULT_ALIGNMENT = %s\n",
		 config_alignment_to_a (WITH_DEFAULT_ALIGNMENT));
#endif

#if defined (WITH_XOR_ENDIAN)
  sim_io_printf (sd, "WITH_XOR_ENDIAN = %d\n", WITH_XOR_ENDIAN);
#endif

#if defined (WITH_FLOATING_POINT)
  sim_io_printf (sd, "WITH_FLOATING_POINT = %s\n",
		 config_floating_point_to_a (WITH_FLOATING_POINT));
#endif

#if defined (WITH_SMP)
  sim_io_printf (sd, "WITH_SMP = %d\n", WITH_SMP);
#endif

#if defined (WITH_RESERVED_BITS)
  sim_io_printf (sd, "WITH_RESERVED_BITS = %d\n", WITH_RESERVED_BITS);
#endif
		 
#if defined (WITH_PROFILE)
  sim_io_printf (sd, "WITH_PROFILE = %d\n", WITH_PROFILE);
#endif
		 
}