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Code scrub for WatchdogTimer driver.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6555 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
xli24 2008-11-17 04:33:19 +00:00
parent 636578d333
commit 96437c903c
3 changed files with 67 additions and 69 deletions
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83
MdeModulePkg/Universal/WatchdogTimerDxe/WatchdogTimer.c
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@ -1,7 +1,5 @@
/** @file /** @file
Implementation of Watchdog Timer Architectural Protocol using UEFI APIs.
Generic watchdog timer services implemenetation using UEFI APIs and
install watchdog timer architecture protocol.
Copyright (c) 2006 - 2008, Intel Corporation Copyright (c) 2006 - 2008, Intel Corporation
All rights reserved. This program and the accompanying materials All rights reserved. This program and the accompanying materials
@ -19,7 +17,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
// //
// Handle for the Watchdog Timer Architectural Protocol instance produced by this driver // Handle for the Watchdog Timer Architectural Protocol instance produced by this driver
// //
EFI_HANDLE mWatchdogTimerHandle = NULL; EFI_HANDLE mWatchdogTimerHandle = NULL;
// //
// The Watchdog Timer Architectural Protocol instance produced by this driver // The Watchdog Timer Architectural Protocol instance produced by this driver
@ -31,35 +29,35 @@ EFI_WATCHDOG_TIMER_ARCH_PROTOCOL mWatchdogTimer = {
}; };
// //
// The watchdog timer period in 100 nS units // The watchdog timer period in 100 ns units
// //
UINT64 mWatchdogTimerPeriod = 0; UINT64 mWatchdogTimerPeriod = 0;
// //
// The notification function to call if the watchdig timer fires // The notification function to call if the watchdig timer fires
// //
EFI_WATCHDOG_TIMER_NOTIFY mWatchdogTimerNotifyFunction = NULL; EFI_WATCHDOG_TIMER_NOTIFY mWatchdogTimerNotifyFunction = NULL;
// //
// The one-shot timer event that is armed when the watchdog timer is enabled // The one-shot timer event that is armed when the watchdog timer is enabled
// //
EFI_EVENT mWatchdogTimerEvent; EFI_EVENT mWatchdogTimerEvent;
/** /**
Notification function that is called if the watchdog timer is fired. If a Notification function that is called if the watchdog timer is fired.
handler has been registered with the Watchdog Timer Architectural Protocol,
then that handler is called passing in the time period that has passed that
cause the watchdog timer to fire. Then, a call to the Runtime Service
ResetSystem() is made to reset the platform.
Notification function for the one-shot timer event that was signaled
when the watchdog timer expired. If a handler has been registered with
the Watchdog Timer Architectural Protocol, then that handler is called
passing in the time period that has passed that cause the watchdog timer
to fire. Then, a call to the Runtime Service ResetSystem() is made to
reset the platform.
@param Timer The one-shot timer event that was signaled when the watchdog timer @param Timer The one-shot timer event that was signaled when the
expired. watchdog timer expired.
@param Context The context that was registered when the event Timer was created. @param Context The context that was registered when the event Timer was created.
@return None.
**/ **/
VOID VOID
EFIAPI EFIAPI
@ -84,6 +82,8 @@ WatchdogTimerDriverExpires (
/** /**
Registers a handler that is to be invoked when the watchdog timer fires.
This function registers a handler that is to be invoked when the watchdog This function registers a handler that is to be invoked when the watchdog
timer fires. By default, the EFI_WATCHDOG_TIMER protocol will call the timer fires. By default, the EFI_WATCHDOG_TIMER protocol will call the
Runtime Service ResetSystem() when the watchdog timer fires. If a Runtime Service ResetSystem() when the watchdog timer fires. If a
@ -99,9 +99,9 @@ WatchdogTimerDriverExpires (
@param NotifyFunction The function to call when the watchdog timer fires. If this @param NotifyFunction The function to call when the watchdog timer fires. If this
is NULL, then the handler will be unregistered. is NULL, then the handler will be unregistered.
@return EFI_SUCCESS The watchdog timer handler was registered or unregistered. @retval EFI_SUCCESS The watchdog timer handler was registered or unregistered.
@return EFI_ALREADY_STARTED NotifyFunction is not NULL, and a handler is already registered. @retval EFI_ALREADY_STARTED NotifyFunction is not NULL, and a handler is already registered.
@return EFI_INVALID_PARAMETER NotifyFunction is NULL, and a handler was not previously registered. @retval EFI_INVALID_PARAMETER NotifyFunction is NULL, and a handler was not previously registered.
**/ **/
EFI_STATUS EFI_STATUS
@ -111,10 +111,17 @@ WatchdogTimerDriverRegisterHandler (
IN EFI_WATCHDOG_TIMER_NOTIFY NotifyFunction IN EFI_WATCHDOG_TIMER_NOTIFY NotifyFunction
) )
{ {
//
// If NotifyFunction is NULL, and a handler was not previously registered,
// return EFI_INVALID_PARAMETER.
//
if (NotifyFunction == NULL && mWatchdogTimerNotifyFunction == NULL) { if (NotifyFunction == NULL && mWatchdogTimerNotifyFunction == NULL) {
return EFI_INVALID_PARAMETER; return EFI_INVALID_PARAMETER;
} }
//
// If NotifyFunction is not NULL, and a handler is already registered,
// return EFI_ALREADY_STARTED.
//
if (NotifyFunction != NULL && mWatchdogTimerNotifyFunction != NULL) { if (NotifyFunction != NULL && mWatchdogTimerNotifyFunction != NULL) {
return EFI_ALREADY_STARTED; return EFI_ALREADY_STARTED;
} }
@ -125,18 +132,20 @@ WatchdogTimerDriverRegisterHandler (
} }
/** /**
Sets the amount of time in the future to fire the watchdog timer.
This function sets the amount of time to wait before firing the watchdog This function sets the amount of time to wait before firing the watchdog
timer to TimerPeriod 100 nS units. If TimerPeriod is 0, then the watchdog timer to TimerPeriod 100 ns units. If TimerPeriod is 0, then the watchdog
timer is disabled. timer is disabled.
@param This The EFI_WATCHDOG_TIMER_ARCH_PROTOCOL instance. @param This The EFI_WATCHDOG_TIMER_ARCH_PROTOCOL instance.
@param TimerPeriod The amount of time in 100 nS units to wait before the watchdog @param TimerPeriod The amount of time in 100 ns units to wait before the watchdog
timer is fired. If TimerPeriod is zero, then the watchdog timer is fired. If TimerPeriod is zero, then the watchdog
timer is disabled. timer is disabled.
@return EFI_SUCCESS The watchdog timer has been programmed to fire in Time @retval EFI_SUCCESS The watchdog timer has been programmed to fire in Time
100 nS units. 100 ns units.
@return EFI_DEVICE_ERROR A watchdog timer could not be programmed due to a device @retval EFI_DEVICE_ERROR A watchdog timer could not be programmed due to a device
error. error.
**/ **/
@ -157,18 +166,20 @@ WatchdogTimerDriverSetTimerPeriod (
} }
/** /**
Retrieves the amount of time in 100 ns units that the system will wait before firing the watchdog timer.
This function retrieves the amount of time the system will wait before firing This function retrieves the amount of time the system will wait before firing
the watchdog timer. This period is returned in TimerPeriod, and EFI_SUCCESS the watchdog timer. This period is returned in TimerPeriod, and EFI_SUCCESS
is returned. If TimerPeriod is NULL, then EFI_INVALID_PARAMETER is returned. is returned. If TimerPeriod is NULL, then EFI_INVALID_PARAMETER is returned.
@param This The EFI_WATCHDOG_TIMER_ARCH_PROTOCOL instance. @param This The EFI_WATCHDOG_TIMER_ARCH_PROTOCOL instance.
@param TimerPeriod A pointer to the amount of time in 100 nS units that the system @param TimerPeriod A pointer to the amount of time in 100 ns units that the system
will wait before the watchdog timer is fired. If TimerPeriod of will wait before the watchdog timer is fired. If TimerPeriod of
zero is returned, then the watchdog timer is disabled. zero is returned, then the watchdog timer is disabled.
@return EFI_SUCCESS The amount of time that the system will wait before @retval EFI_SUCCESS The amount of time that the system will wait before
firing the watchdog timer was returned in TimerPeriod. firing the watchdog timer was returned in TimerPeriod.
@return EFI_INVALID_PARAMETER TimerPeriod is NULL. @retval EFI_INVALID_PARAMETER TimerPeriod is NULL.
**/ **/
EFI_STATUS EFI_STATUS
@ -188,12 +199,12 @@ WatchdogTimerDriverGetTimerPeriod (
} }
/** /**
Initialize the Watchdog Timer Architectural Protocol driver. Entry point of the Watchdog Timer Architectural Protocol driver.
@param ImageHandle ImageHandle of the loaded driver. @param ImageHandle The image handle of this driver.
@param SystemTable Pointer to the System Table. @param SystemTable The pointer of EFI_SYSTEM_TABLE.
@return EFI_SUCCESS Timer Architectural Protocol created. @retval EFI_SUCCESS Watchdog Timer Architectural Protocol successfully installed.
**/ **/
EFI_STATUS EFI_STATUS
@ -206,12 +217,12 @@ WatchdogTimerDriverInitialize (
EFI_STATUS Status; EFI_STATUS Status;
// //
// Make sure the Watchdog Timer Architectural Protocol is not already installed in the system // Make sure the Watchdog Timer Architectural Protocol has not been installed in the system yet.
// //
ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiWatchdogTimerArchProtocolGuid); ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiWatchdogTimerArchProtocolGuid);
// //
// Create the timer event used to implement a simple watchdog timer // Create the timer event to implement a simple watchdog timer
// //
Status = gBS->CreateEvent ( Status = gBS->CreateEvent (
EVT_TIMER | EVT_NOTIFY_SIGNAL, EVT_TIMER | EVT_NOTIFY_SIGNAL,
@ -233,5 +244,5 @@ WatchdogTimerDriverInitialize (
); );
ASSERT_EFI_ERROR (Status); ASSERT_EFI_ERROR (Status);
return Status; return EFI_SUCCESS;
} }

48
MdeModulePkg/Universal/WatchdogTimerDxe/WatchdogTimer.h
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@ -1,7 +1,5 @@
/** @file /** @file
The internal include file for WatchDogTimer module.
The internal header file includes the common header files, defines
internal functions used by WatchDogTimer module.
Copyright (c) 2006 - 2008, Intel Corporation Copyright (c) 2006 - 2008, Intel Corporation
All rights reserved. This program and the accompanying materials All rights reserved. This program and the accompanying materials
@ -30,6 +28,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
/** /**
Registers a handler that is to be invoked when the watchdog timer fires.
This function registers a handler that is to be invoked when the watchdog This function registers a handler that is to be invoked when the watchdog
timer fires. By default, the EFI_WATCHDOG_TIMER protocol will call the timer fires. By default, the EFI_WATCHDOG_TIMER protocol will call the
Runtime Service ResetSystem() when the watchdog timer fires. If a Runtime Service ResetSystem() when the watchdog timer fires. If a
@ -45,9 +45,9 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
@param NotifyFunction The function to call when the watchdog timer fires. If this @param NotifyFunction The function to call when the watchdog timer fires. If this
is NULL, then the handler will be unregistered. is NULL, then the handler will be unregistered.
@return EFI_SUCCESS The watchdog timer handler was registered or unregistered. @retval EFI_SUCCESS The watchdog timer handler was registered or unregistered.
@return EFI_ALREADY_STARTED NotifyFunction is not NULL, and a handler is already registered. @retval EFI_ALREADY_STARTED NotifyFunction is not NULL, and a handler is already registered.
@return EFI_INVALID_PARAMETER NotifyFunction is NULL, and a handler was not previously registered. @retval EFI_INVALID_PARAMETER NotifyFunction is NULL, and a handler was not previously registered.
**/ **/
EFI_STATUS EFI_STATUS
@ -58,18 +58,20 @@ WatchdogTimerDriverRegisterHandler (
); );
/** /**
Sets the amount of time in the future to fire the watchdog timer.
This function sets the amount of time to wait before firing the watchdog This function sets the amount of time to wait before firing the watchdog
timer to TimerPeriod 100 nS units. If TimerPeriod is 0, then the watchdog timer to TimerPeriod 100 ns units. If TimerPeriod is 0, then the watchdog
timer is disabled. timer is disabled.
@param This The EFI_WATCHDOG_TIMER_ARCH_PROTOCOL instance. @param This The EFI_WATCHDOG_TIMER_ARCH_PROTOCOL instance.
@param TimerPeriod The amount of time in 100 nS units to wait before the watchdog @param TimerPeriod The amount of time in 100 ns units to wait before the watchdog
timer is fired. If TimerPeriod is zero, then the watchdog timer is fired. If TimerPeriod is zero, then the watchdog
timer is disabled. timer is disabled.
@return EFI_SUCCESS The watchdog timer has been programmed to fire in Time @retval EFI_SUCCESS The watchdog timer has been programmed to fire in Time
100 nS units. 100 ns units.
@return EFI_DEVICE_ERROR A watchdog timer could not be programmed due to a device @retval EFI_DEVICE_ERROR A watchdog timer could not be programmed due to a device
error. error.
**/ **/
@ -81,18 +83,20 @@ WatchdogTimerDriverSetTimerPeriod (
); );
/** /**
Retrieves the amount of time in 100 ns units that the system will wait before firing the watchdog timer.
This function retrieves the amount of time the system will wait before firing This function retrieves the amount of time the system will wait before firing
the watchdog timer. This period is returned in TimerPeriod, and EFI_SUCCESS the watchdog timer. This period is returned in TimerPeriod, and EFI_SUCCESS
is returned. If TimerPeriod is NULL, then EFI_INVALID_PARAMETER is returned. is returned. If TimerPeriod is NULL, then EFI_INVALID_PARAMETER is returned.
@param This The EFI_WATCHDOG_TIMER_ARCH_PROTOCOL instance. @param This The EFI_WATCHDOG_TIMER_ARCH_PROTOCOL instance.
@param TimerPeriod A pointer to the amount of time in 100 nS units that the system @param TimerPeriod A pointer to the amount of time in 100 ns units that the system
will wait before the watchdog timer is fired. If TimerPeriod of will wait before the watchdog timer is fired. If TimerPeriod of
zero is returned, then the watchdog timer is disabled. zero is returned, then the watchdog timer is disabled.
@return EFI_SUCCESS The amount of time that the system will wait before @retval EFI_SUCCESS The amount of time that the system will wait before
firing the watchdog timer was returned in TimerPeriod. firing the watchdog timer was returned in TimerPeriod.
@return EFI_INVALID_PARAMETER TimerPeriod is NULL. @retval EFI_INVALID_PARAMETER TimerPeriod is NULL.
**/ **/
EFI_STATUS EFI_STATUS
@ -102,20 +106,4 @@ WatchdogTimerDriverGetTimerPeriod (
IN UINT64 *TimerPeriod IN UINT64 *TimerPeriod
); );
/**
Initialize the Watchdog Timer Architectural Protocol driver.
@param ImageHandle ImageHandle of the loaded driver.
@param SystemTable Pointer to the System Table.
@return EFI_SUCCESS Timer Architectural Protocol created.
**/
EFI_STATUS
EFIAPI
WatchdogTimerDriverInitialize (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
);
#endif #endif

5
MdeModulePkg/Universal/WatchdogTimerDxe/WatchdogTimer.inf
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@ -1,8 +1,7 @@
#/** @file #/** @file
# Component description file for WatchdogTimer module. # Generic watchdog timer driver produceing Watchdog Timer Architectural Protocol using UEFI APIs.
# #
# Generic watchdog timer implemenetation using EFI APIs. # Copyright (c) 2006 - 2008, Intel Corporation
# Copyright (c) 2006 - 2007, Intel Corporation
# #
# All rights reserved. This program and the accompanying materials # All rights reserved. This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License # are licensed and made available under the terms and conditions of the BSD License