diff options
Diffstat (limited to 'qemu/roms/ipxe/src/interface/efi/efi_watchdog.c')
-rw-r--r-- | qemu/roms/ipxe/src/interface/efi/efi_watchdog.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/interface/efi/efi_watchdog.c b/qemu/roms/ipxe/src/interface/efi/efi_watchdog.c new file mode 100644 index 000000000..7061f81d8 --- /dev/null +++ b/qemu/roms/ipxe/src/interface/efi/efi_watchdog.c @@ -0,0 +1,82 @@ +/* + * 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 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 + * + * EFI watchdog holdoff timer + * + */ + +#include <errno.h> +#include <string.h> +#include <ipxe/retry.h> +#include <ipxe/timer.h> +#include <ipxe/efi/efi.h> +#include <ipxe/efi/efi_watchdog.h> + +/** Watchdog holdoff interval (in seconds) */ +#define WATCHDOG_HOLDOFF_SECS 10 + +/** Watchdog timeout (in seconds) */ +#define WATCHDOG_TIMEOUT_SECS ( 5 * 60 ) + +/** Watchdog code (to be logged on watchdog timeout) */ +#define WATCHDOG_CODE 0x6950584544454144ULL + +/** Watchdog data (to be logged on watchdog timeout) */ +#define WATCHDOG_DATA L"iPXE"; + +/** + * Hold off watchdog timer + * + * @v retry Retry timer + * @v over Failure indicator + */ +static void efi_watchdog_expired ( struct retry_timer *timer, + int over __unused ) { + EFI_BOOT_SERVICES *bs = efi_systab->BootServices; + static CHAR16 data[] = WATCHDOG_DATA; + EFI_STATUS efirc; + int rc; + + DBGC2 ( timer, "EFI holding off watchdog timer\n" ); + + /* Restart this holdoff timer */ + start_timer_fixed ( timer, ( WATCHDOG_HOLDOFF_SECS * TICKS_PER_SEC ) ); + + /* Reset watchdog timer */ + if ( ( efirc = bs->SetWatchdogTimer ( WATCHDOG_TIMEOUT_SECS, + WATCHDOG_CODE, sizeof ( data ), + data ) ) != 0 ) { + rc = -EEFI ( efirc ); + DBGC ( timer, "EFI could not set watchdog timer: %s\n", + strerror ( rc ) ); + return; + } +} + +/** Watchdog holdoff timer */ +struct retry_timer efi_watchdog = TIMER_INIT ( efi_watchdog_expired ); |