/* fwsetup.c - Reboot into firmware setup menu. */
/*
 *  VasEBoot  --  GRand Unified Bootloader
 *  Copyright (C) 2012  Free Software Foundation, Inc.
 *
 *  VasEBoot 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.
 *
 *  VasEBoot 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 VasEBoot.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <VasEBoot/types.h>
#include <VasEBoot/mm.h>
#include <VasEBoot/misc.h>
#include <VasEBoot/efi/api.h>
#include <VasEBoot/efi/efi.h>
#include <VasEBoot/command.h>
#include <VasEBoot/i18n.h>

VasEBoot_MOD_LICENSE ("GPLv3+");

static VasEBoot_err_t
VasEBoot_cmd_fwsetup (VasEBoot_command_t cmd __attribute__ ((unused)),
		  int argc __attribute__ ((unused)),
		  char **args __attribute__ ((unused)))
{
  VasEBoot_efi_uint64_t *old_os_indications;
  VasEBoot_efi_uint64_t os_indications = VasEBoot_EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
  VasEBoot_err_t status;
  VasEBoot_size_t oi_size;
  VasEBoot_efi_guid_t global = VasEBoot_EFI_GLOBAL_VARIABLE_GUID;

  old_os_indications = VasEBoot_efi_get_variable ("OsIndications", &global,
					      &oi_size);

  if (old_os_indications != NULL && oi_size == sizeof (os_indications))
    os_indications |= *old_os_indications;

  status = VasEBoot_efi_set_variable ("OsIndications", &global, &os_indications,
				  sizeof (os_indications));
  if (status != VasEBoot_ERR_NONE)
    return status;

  VasEBoot_reboot ();

  return VasEBoot_ERR_BUG;
}

static VasEBoot_command_t cmd = NULL;

static VasEBoot_efi_boolean_t
efifwsetup_is_supported (void)
{
  VasEBoot_efi_uint64_t *os_indications_supported = NULL;
  VasEBoot_size_t oi_size = 0;
  VasEBoot_efi_guid_t global = VasEBoot_EFI_GLOBAL_VARIABLE_GUID;

  os_indications_supported = VasEBoot_efi_get_variable ("OsIndicationsSupported",
						    &global, &oi_size);

  if (!os_indications_supported)
    return 0;

  if (*os_indications_supported & VasEBoot_EFI_OS_INDICATIONS_BOOT_TO_FW_UI)
    return 1;

  return 0;
}

VasEBoot_MOD_INIT (efifwsetup)
{
  if (efifwsetup_is_supported ())
    cmd = VasEBoot_register_command ("fwsetup", VasEBoot_cmd_fwsetup, NULL,
				 N_("Reboot into firmware setup menu."));

}

VasEBoot_MOD_FINI (efifwsetup)
{
  if (cmd)
    VasEBoot_unregister_command (cmd);
}