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[efi] Add EFI time source

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-04-14 11:55:08 +01:00
parent eb2252fd7a
commit 6567511c3d
5 changed files with 98 additions and 1 deletions
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75
src/interface/efi/efi_time.c Normal file
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/*
* Copyright (C) 2015 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 (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., 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 );
#include <string.h>
#include <errno.h>
#include <time.h>
#include <ipxe/time.h>
#include <ipxe/efi/efi.h>
/** @file
*
* EFI time source
*
*/
/**
* Get current time in seconds
*
* @ret time Time, in seconds
*/
static time_t efi_get_time ( void ) {
EFI_RUNTIME_SERVICES *rs = efi_systab->RuntimeServices;
EFI_TIME time;
struct tm tm;
EFI_STATUS efirc;
int rc;
/* Get current time and date */
if ( ( efirc = rs->GetTime ( &time, NULL ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( rs, "EFITIME could not get system time: %s\n",
strerror ( rc ) );
/* Nothing meaningful we can return */
return 0;
}
/* Construct broken-down time */
memset ( &tm, 0, sizeof ( tm ) );
tm.tm_sec = time.Second;
tm.tm_min = time.Minute;
tm.tm_hour = time.Hour;
tm.tm_mday = time.Day;
tm.tm_mon = ( time.Month - 1 );
tm.tm_year = ( time.Year - 1900 );
DBGC ( rs, "EFITIME is %04d-%02d-%02d %02d:%02d:%02d\n",
( tm.tm_year + 1900 ), ( tm.tm_mon + 1 ),
tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec );
/* Convert to seconds since the Epoch */
return mktime ( &tm );
}
PROVIDE_TIME ( efi, time_now, efi_get_time );