audk/Vlv2TbltDevicePkg/Include/Protocol/HwWatchdogTimer.h

/*++

  Copyright (c) 2004  - 2014, 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.    
                                                                                   


Module Name:

  HwWatchdogTimer.h

Abstract:


--*/

#ifndef __EFI_WATCHDOG_TIMER_DRIVER_PROTOCOL_H__
#define __EFI_WATCHDOG_TIMER_DRIVER_PROTOCOL_H__

#define EFI_WATCHDOG_TIMER_DRIVER_PROTOCOL_GUID \
  { 0xd5b06d16, 0x2ea1, 0x4def, 0x98, 0xd0, 0xa0, 0x5d, 0x40, 0x72, 0x84, 0x17 }

#define EFI_WATCHDOG_TIMER_NOT_SUPPORTED_PROTOCOL_GUID \
  { 0xe9e156ac, 0x3203, 0x4572, 0xac, 0xdf, 0x84, 0x4f, 0xdc, 0xdb, 0x6, 0xbf }


#include <Guid/HwWatchdogTimerHob.h>

//
// General Purpose Constants
//
#define ICH_INSTAFLUSH_GPIO      BIT16 // BIT 16 in GPIO Level 2 is GPIO 48.
#define B_INSTAFLUSH             BIT4

//
// Other Watchdog timer values
//
#define WDT_COUNTDOWN_VALUE                 0x14
#define BDS_WDT_COUNTDOWN_VALUE             0x35

//
// Prototypes for the Watchdog Timer Driver Protocol
//

/**
  This service begins the Watchdog Timer countdown.  If the countdown completes prior to
  Stop Timer or Restart Timer the system will reset.

  @param[in] None

  @retval EFI_SUCCESS        Operation completed successfully
  @retval EFI_DEVICE_ERROR   The command was unsuccessful

**/
typedef
EFI_STATUS
(EFIAPI *EFI_WATCHDOG_START_TIMER) (
  VOID
  );

/**
  This service resets the Watchdog Timer countdown and should only be called after the
  Start Timer function.

  @param[in] None

  @retval EFI_SUCCESS        Operation completed successfully
  @retval EFI_DEVICE_ERROR   The command was unsuccessful

**/
typedef
EFI_STATUS
(EFIAPI *PEI_WATCHDOG_RESET_TIMER) (
  VOID
  );

/**
  This service restarts the Watchdog Timer countdown and should only be called after the
  Start Timer function.

  @param[in] None

  @retval EFI_SUCCESS        Operation completed successfully
  @retval EFI_DEVICE_ERROR   The command was unsuccessful

**/
typedef
EFI_STATUS
(EFIAPI *EFI_WATCHDOG_RESTART_TIMER) (
  VOID
  );

/**
  This service disables the Watchdog Timer countdown.

  @param[in] None

  @retval EFI_SUCCESS        Operation completed successfully
  @retval EFI_DEVICE_ERROR   The command was unsuccessful

**/
typedef
EFI_STATUS
(EFIAPI *EFI_WATCHDOG_STOP_TIMER) (
  VOID
  );

/**

**/
typedef
EFI_STATUS
(EFIAPI *EFI_WATCHDOG_CHECK_TIMEOUT) (
  OUT HW_WATCHDOG_TIMEOUT       *WatchdogTimeout
  );



/**
  This service forces a reboot of the system due to a reset of the POWERGOOD_PS,
  POWERGOOD_CLK, and the BSEL Override

  Arguments:
    None

  Returns:
    This function should not return!

    EFI_DEVICE_ERROR  - The command was unsuccessful and a reboot did not occur

**/
typedef
EFI_STATUS
(EFIAPI *EFI_WATCHDOG_FORCE_REBOOT) (
  IN BOOLEAN                    ForceTimeout,
  IN UINT8                      ResetType
  );

/**
  This service notifies the Watchdog Timer of the fact that a known reset is occuring.

  @param[in] AllowReset  TRUE if a Reset is currently expected
                         FALSE if a Reset is not currently expected

    This function should not return!

    EFI_DEVICE_ERROR  - The command was unsuccessful and a reboot did not occur

**/
typedef
EFI_STATUS
(EFIAPI *EFI_WATCHDOG_KNOWN_RESET) (
  IN BOOLEAN                    AllowReset
  );

/**
  This service reads the current Watchdog Timer countdown reload value.

  @param[in] CountdownValue      pointer to UINT32 to return the value of the reload register.

  @retval    EFI_SUCCESS         Operation completed successfully
  @retval    EFI_DEVICE_ERROR    The command was unsuccessful

**/
typedef
EFI_STATUS
(EFIAPI *EFI_GET_TIMER_COUNT_DOWN_PERIOD)(
  OUT UINT32      *CountdownValue
  );

/**
  This service reads the current Watchdog Timer countdown reload value.

  @param[in] CountdownValue  Value to set the reload register.

  @retval EFI_SUCCESS        Operation completed successfully
  @retval EFI_DEVICE_ERROR   The command was unsuccessful

**/
typedef
EFI_STATUS
(EFIAPI *EFI_SET_TIMER_COUNT_DOWN_PERIOD)(
  OUT UINT32      CountdownValue
  );

/**
  This service clears the state that indicates the Watchdog Timer fired.

  @retval EFI_SUCCESS       - Operation completed successfully
  @retval EFI_DEVICE_ERROR  - The command was unsuccessful

**/
typedef
EFI_STATUS
(EFIAPI *PEI_WATCHDOG_CLEAR_TIMER_STATE) (
  );

/**
  This service disables the Watchdog Timer countdown.  It also closes the recurring restart event
  if the event exists.

  @param[in] Stall  TRUE = Stop the timer countdown
                    FALSE = Start the timer countdown

  @retval  EFI_SUCCESS        Operation completed successfully
  @retval  EFI_DEVICE_ERROR   The command was unsuccessful

**/
typedef
EFI_STATUS
(EFIAPI *EFI_STALL_WATCHDOG_COUNTDOWN) (
  IN BOOLEAN Stall
  );


typedef struct _EFI_WATCHDOG_TIMER_DRIVER_PROTOCOL {
  EFI_WATCHDOG_START_TIMER                      StartWatchdogTimer;
  PEI_WATCHDOG_RESET_TIMER                      ResetWatchdogTimeout;
  EFI_WATCHDOG_RESTART_TIMER                    RestartWatchdogTimer;
  EFI_WATCHDOG_STOP_TIMER                       StopWatchdogTimer;
  EFI_WATCHDOG_CHECK_TIMEOUT                    CheckWatchdogTimeout;
  EFI_WATCHDOG_FORCE_REBOOT                     ForceReboot;
  EFI_WATCHDOG_KNOWN_RESET                      AllowKnownReset;
  EFI_GET_TIMER_COUNT_DOWN_PERIOD               GetCountdownPeriod;
  EFI_SET_TIMER_COUNT_DOWN_PERIOD               SetCountdownPeriod;
  PEI_WATCHDOG_CLEAR_TIMER_STATE                ClearTimerState;
  EFI_STALL_WATCHDOG_COUNTDOWN                  StallWatchdogCountdown;
} EFI_WATCHDOG_TIMER_DRIVER_PROTOCOL;

extern EFI_GUID gEfiWatchdogTimerDriverProtocolGuid;
extern EFI_GUID gEfiWatchdogTimerNotSupportedProtocolGuid;

#endif