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/*
* Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>.
*
* 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 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
FILE_SECBOOT ( PERMITTED );
/**
* @file
*
* EFI reboot mechanism
*
*/
#include <errno.h>
#include <string.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Guid/GlobalVariable.h>
#include <ipxe/reboot.h>
/**
* Reboot system
*
* @v flags Reboot flags
*/
static void efi_reboot ( int flags ) {
EFI_RUNTIME_SERVICES *rs = efi_systab->RuntimeServices;
static CHAR16 wname[] = EFI_OS_INDICATIONS_VARIABLE_NAME;
UINT64 osind;
UINT32 attrs;
EFI_RESET_TYPE type;
EFI_STATUS efirc;
int rc;
/* Request boot to firmware setup, if applicable */
if ( flags & REBOOT_SETUP ) {
osind = EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
attrs = ( EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS |
EFI_VARIABLE_NON_VOLATILE );
if ( ( efirc = rs->SetVariable ( wname, &efi_global_variable,
attrs, sizeof ( osind ),
&osind ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( efi_systab, "EFI could not set %ls: %s\n",
wname, strerror ( rc ) );
/* Continue to reboot anyway */
}
}
/* Use runtime services to reset system */
type = ( ( flags & REBOOT_WARM ) ? EfiResetWarm : EfiResetCold );
rs->ResetSystem ( type, 0, 0, NULL );
}
/**
* Power off system
*
* @ret rc Return status code
*/
static int efi_poweroff ( void ) {
EFI_RUNTIME_SERVICES *rs = efi_systab->RuntimeServices;
/* Use runtime services to power off system */
rs->ResetSystem ( EfiResetShutdown, 0, 0, NULL );
/* Should never happen */
return -ECANCELED;
}
PROVIDE_REBOOT ( efi, reboot, efi_reboot );
PROVIDE_REBOOT ( efi, poweroff, efi_poweroff );
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