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73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/** @file
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UEFI Miscellaneous boot Services SetWatchdogTimer service implementation
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Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "DxeMain.h"
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#define WATCHDOG_TIMER_CALIBRATE_PER_SECOND 10000000
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/**
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Sets the system's watchdog timer.
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@param Timeout The number of seconds to set the watchdog timer to.
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A value of zero disables the timer.
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@param WatchdogCode The numeric code to log on a watchdog timer timeout
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event. The firmware reserves codes 0x0000 to 0xFFFF.
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Loaders and operating systems may use other timeout
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codes.
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@param DataSize The size, in bytes, of WatchdogData.
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@param WatchdogData A data buffer that includes a Null-terminated Unicode
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string, optionally followed by additional binary data.
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The string is a description that the call may use to
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further indicate the reason to be logged with a
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watchdog event.
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@return EFI_SUCCESS Timeout has been set
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@return EFI_NOT_AVAILABLE_YET WatchdogTimer is not available yet
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@return EFI_UNSUPPORTED System does not have a timer (currently not used)
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@return EFI_DEVICE_ERROR Could not complete due to hardware error
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**/
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EFI_STATUS
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EFIAPI
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CoreSetWatchdogTimer (
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IN UINTN Timeout,
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IN UINT64 WatchdogCode,
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IN UINTN DataSize,
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IN CHAR16 *WatchdogData OPTIONAL
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)
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{
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EFI_STATUS Status;
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//
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// Check our architectural protocol
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//
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if (gWatchdogTimer == NULL) {
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return EFI_NOT_AVAILABLE_YET;
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}
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//
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// Attempt to set the timeout
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//
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Status = gWatchdogTimer->SetTimerPeriod (gWatchdogTimer, MultU64x32 (Timeout, WATCHDOG_TIMER_CALIBRATE_PER_SECOND));
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//
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// Check for errors
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//
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if (EFI_ERROR (Status)) {
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return EFI_DEVICE_ERROR;
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}
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return EFI_SUCCESS;
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}
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