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/** @file
UEFI Miscellaneous boot Services SetWatchdogTimer service implementation
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "DxeMain.h"
#define WATCHDOG_TIMER_CALIBRATE_PER_SECOND 10000000
/**
Sets the system's watchdog timer.
@param Timeout The number of seconds to set the watchdog timer to.
A value of zero disables the timer.
@param WatchdogCode The numeric code to log on a watchdog timer timeout
event. The firmware reserves codes 0x0000 to 0xFFFF.
Loaders and operating systems may use other timeout
codes.
@param DataSize The size, in bytes, of WatchdogData.
@param WatchdogData A data buffer that includes a Null-terminated Unicode
string, optionally followed by additional binary data.
The string is a description that the call may use to
further indicate the reason to be logged with a
watchdog event.
@return EFI_SUCCESS Timeout has been set
@return EFI_NOT_AVAILABLE_YET WatchdogTimer is not available yet
@return EFI_UNSUPPORTED System does not have a timer (currently not used)
@return EFI_DEVICE_ERROR Could not complete due to hardware error
**/
EFI_STATUS
EFIAPI
CoreSetWatchdogTimer (
IN UINTN Timeout,
IN UINT64 WatchdogCode,
IN UINTN DataSize,
IN CHAR16 *WatchdogData OPTIONAL
)
{
EFI_STATUS Status;
//
// Check our architectural protocol
//
if (gWatchdogTimer == NULL) {
return EFI_NOT_AVAILABLE_YET;
}
//
// Attempt to set the timeout
//
Status = gWatchdogTimer->SetTimerPeriod (gWatchdogTimer, MultU64x32 (Timeout, WATCHDOG_TIMER_CALIBRATE_PER_SECOND));
//
// Check for errors
//
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
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