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/** @file
IPMI Os watchdog timer Driver.
Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Uefi.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/IpmiCommandLib.h>
#include <IndustryStandard/Ipmi.h>
#include <IpmiEx.h>
BOOLEAN mOsWdtFlag = FALSE;
EFI_EVENT mExitBootServicesEvent;
VOID
EFIAPI
EnableEfiOsBootWdtHandler (
IN EFI_EVENT Event,
IN VOID *Context
)
/*++
Routine Description:
Enable the OS Boot Watchdog Timer.
Is called only on legacy or EFI OS boot.
Arguments:
Event - Event type
*Context - Context for the event
Returns:
None
--*/
{
EFI_STATUS Status;
IPMI_SET_WATCHDOG_TIMER_REQUEST SetWatchdogTimer;
UINT8 CompletionCode;
IPMI_GET_WATCHDOG_TIMER_RESPONSE GetWatchdogTimer;
static BOOLEAN OsWdtEventHandled = FALSE;
DEBUG((EFI_D_ERROR, "!!! EnableEfiOsBootWdtHandler()!!!\n"));
//
// Make sure it processes once only. And proceess it only if OsWdtFlag==TRUE;
//
if (OsWdtEventHandled || !mOsWdtFlag) {
return ;
}
OsWdtEventHandled = TRUE;
Status = IpmiGetWatchdogTimer (&GetWatchdogTimer);
if (EFI_ERROR (Status)) {
return ;
}
ZeroMem (&SetWatchdogTimer, sizeof(SetWatchdogTimer));
//
// Just flip the Timer Use bit. This should release the timer.
//
SetWatchdogTimer.TimerUse.TimerRunning = 1;
SetWatchdogTimer.TimerUse.TimerUse = IPMI_WATCHDOG_TIMER_OS_LOADER;
SetWatchdogTimer.TimerActions = IPMI_WATCHDOG_TIMER_ACTION_HARD_RESET;
SetWatchdogTimer.TimerUseExpirationFlagsClear &= ~BIT4;
SetWatchdogTimer.TimerUseExpirationFlagsClear |= BIT1 | BIT2;
SetWatchdogTimer.InitialCountdownValue = 600; // 100ms / count
Status = IpmiSetWatchdogTimer (&SetWatchdogTimer, &CompletionCode);
return ;
}
EFI_STATUS
EFIAPI
DriverInit (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
/*++
Routine Description:
This is the standard EFI driver point. This function intitializes
the private data required for creating ASRR Driver.
Arguments:
As required for DXE driver enrty routine.
ImageHandle - ImageHandle of the loaded driver
SystemTable - Pointer to the System Table
Returns:
EFI_SUCCESS - Protocol successfully started and installed.
--*/
{
EFI_STATUS Status;
Status = gBS->CreateEvent (
EVT_SIGNAL_EXIT_BOOT_SERVICES,
TPL_NOTIFY,
EnableEfiOsBootWdtHandler,
NULL,
&mExitBootServicesEvent
);
return EFI_SUCCESS;
}
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