/* load.c --- loading object files into the M32C simulator.

Copyright (C) 2005 Free Software Foundation, Inc.
Contributed by Red Hat, Inc.

This file is part of the GNU simulators.

The GNU simulators are free software; you can redistribute them and/or
modify them 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.

The GNU simulators are distributed in the hope that they 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 the GNU simulators; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA  */


#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "bfd.h"

#include "cpu.h"
#include "mem.h"

int (*decode_opcode) () = 0;
int default_machine = 0;

void
m32c_set_mach (unsigned long mach)
{
  switch (mach)
    {
    case bfd_mach_m16c:
      m32c_set_cpu (CPU_M16C);
      if (verbose)
	fprintf (stderr, "[cpu: r8c/m16c]\n");
      break;
    case bfd_mach_m32c:
      m32c_set_cpu (CPU_M32C);
      if (verbose)
	fprintf (stderr, "[cpu: m32cm/m32c]\n");
      break;
    default:
      fprintf (stderr, "unknown m32c machine type 0x%lx\n", mach);
      decode_opcode = 0;
      break;
    }
}

void
m32c_load (bfd *prog)
{
  asection *s;
  unsigned long mach = bfd_get_mach (prog);
  unsigned long highest_addr_loaded = 0;

  if (mach == 0 && default_machine != 0)
    mach = default_machine;

  m32c_set_mach (mach);

  for (s = prog->sections; s; s = s->next)
    {
#if 0
      /* This was a good idea until we started storing the RAM data in
         ROM, at which point everything was all messed up.  The code
         remains as a reminder.  */
      if ((s->flags & SEC_ALLOC) && !(s->flags & SEC_READONLY))
	{
	  if (strcmp (bfd_get_section_name (prog, s), ".stack"))
	    {
	      int secend =
		bfd_get_section_size (s) + bfd_section_lma (prog, s);
	      if (heaptop < secend && bfd_section_lma (prog, s) < 0x10000)
		{
		  heaptop = heapbottom = secend;
		}
	    }
	}
#endif
      if (s->flags & SEC_LOAD)
	{
	  char *buf;
	  bfd_size_type size;

	  size = bfd_get_section_size (s);
	  if (size <= 0)
	    continue;

	  bfd_vma base = bfd_section_lma (prog, s);
	  if (verbose)
	    fprintf (stderr, "[load a=%08x s=%08x %s]\n",
		     (int) base, (int) size, bfd_get_section_name (prog, s));
	  buf = (char *) malloc (size);
	  bfd_get_section_contents (prog, s, buf, 0, size);
	  mem_put_blk (base, buf, size);
	  free (buf);
	  if (highest_addr_loaded < base + size - 1 && size >= 4)
	    highest_addr_loaded = base + size - 1;
	}
    }

  if (strcmp (bfd_get_target (prog), "srec") == 0)
    {
      heaptop = heapbottom = 0;
      switch (mach)
	{
	case bfd_mach_m16c:
	  if (highest_addr_loaded > 0x10000)
	    regs.r_pc = mem_get_si (0x000ffffc) & membus_mask;
	  else
	    regs.r_pc = mem_get_si (0x000fffc) & membus_mask;
	  break;
	case bfd_mach_m32c:
	  regs.r_pc = mem_get_si (0x00fffffc) & membus_mask;
	  break;
	}
    }
  else
    regs.r_pc = prog->start_address;
  if (verbose)
    fprintf (stderr, "[start pc=%08x]\n", (unsigned int) regs.r_pc);
}