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/*++
Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
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
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