/* ia32-cmain.c - Startup code for the ia32.
   Copyright (C) 2003, 2007 Free Software Foundation, Inc.
   Written by Marcus Brinkmann.

   This file is part of the GNU Hurd.

   The GNU Hurd 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, or (at
   your option) any later version.

   The GNU Hurd 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, USA. */

#if HAVE_CONFIG_H
#include <config.h>
#endif

#include <alloca.h>
#include <stdint.h>

#include <hurd/stddef.h>

#include <l4/globals.h>
#include <l4/init.h>
#include <l4/stubs.h>
#include <l4/stubs-init.h>

#include "viengoos.h"
#include "multiboot.h"
#include "boot-modules.h"


/* Check if the bit BIT in FLAGS is set.  */
#define CHECK_FLAG(flags,bit)	((flags) & (1 << (bit)))


/* Initialize libl4, setup the argument vector, and pass control over
   to the main function.  */
void
cmain (void)
{
  multiboot_info_t *mbi;
  int argc = 0;
  char **argv = 0;

  l4_init ();
  l4_init_stubs ();

  mbi = (multiboot_info_t *) l4_boot_info ();
  debug (3, "Multiboot Info: %p", mbi);

  if (CHECK_FLAG (mbi->flags, 3) && mbi->mods_count > 0)
    {
      /* A command line is available.  */
      module_t *mod = (module_t *) mbi->mods_addr;
      char *str = (char *) mod[0].string;
      int nr = 0;

      /* First time around we count the number of arguments.  */
      argc = 1;
      while (*str && *str == ' ')
	str++;

      while (*str)
	if (*(str++) == ' ')
	  {
	    while (*str && *str == ' ')
	      str++;
	    if (*str)
	      argc++;
	  }
      argv = alloca (sizeof (char *) * (argc + 1));

      /* Second time around we fill in the argv.  */
      str = (char *) mod[0].string;

      while (*str && *str == ' ')
	str++;
      argv[nr++] = str;

      while (*str)
	{
	  if (*str == ' ')
	    {
	      *(str++) = '\0';
	      while (*str && *str == ' ')
		str++;
	      if (*str)
		argv[nr++] = str;
	    }
	  else
	    str++;
	}
      argv[nr] = 0;
    }
  else
    {
      argc = 1;

      argv = alloca (sizeof (char *) * 2);
      argv[0] = (char *) program_name;
      argv[1] = 0;
    }

  /* Now invoke the main function.  */
  main (argc, argv);

  /* Never reached.  */
}

void
find_components (void)
{
  multiboot_info_t *mbi = (multiboot_info_t *) l4_boot_info ();

  /* Load the module information.  */
  if (CHECK_FLAG (mbi->flags, 3))
    {
      module_t *mod = (module_t *) mbi->mods_addr;
      /* Skip the entry for the rootserver.  */
      mod++;

      boot_module_count = mbi->mods_count - 1;
      if (boot_module_count > BOOT_MODULES_MAX)
	{
	  printf ("WARNING: passed %d modules but only support %d!",
		  boot_module_count, BOOT_MODULES_MAX);
	  boot_module_count = BOOT_MODULES_MAX;
	}

      int i;
      for (i = 0; i < boot_module_count; i++)
	{
	  boot_modules[i].start = mod[i].mod_start;
	  boot_modules[i].end = mod[i].mod_end;
	  boot_modules[i].command_line = (char *) mod[i].string;
	}
    }
}