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Diffstat (limited to 'MdeModulePkg/Core/Dxe/Event/Timer.c')
-rw-r--r--MdeModulePkg/Core/Dxe/Event/Timer.c582
1 files changed, 291 insertions, 291 deletions
diff --git a/MdeModulePkg/Core/Dxe/Event/Timer.c b/MdeModulePkg/Core/Dxe/Event/Timer.c
index 29e507c67c..59c839a4f1 100644
--- a/MdeModulePkg/Core/Dxe/Event/Timer.c
+++ b/MdeModulePkg/Core/Dxe/Event/Timer.c
@@ -1,291 +1,291 @@
-/** @file
- Core Timer Services
-
-Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
-SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#include "DxeMain.h"
-#include "Event.h"
-
-//
-// Internal data
-//
-
-LIST_ENTRY mEfiTimerList = INITIALIZE_LIST_HEAD_VARIABLE (mEfiTimerList);
-EFI_LOCK mEfiTimerLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_HIGH_LEVEL - 1);
-EFI_EVENT mEfiCheckTimerEvent = NULL;
-
-EFI_LOCK mEfiSystemTimeLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_HIGH_LEVEL);
-UINT64 mEfiSystemTime = 0;
-
-//
-// Timer functions
-//
-
-/**
- Inserts the timer event.
-
- @param Event Points to the internal structure of timer event
- to be installed
-
-**/
-VOID
-CoreInsertEventTimer (
- IN IEVENT *Event
- )
-{
- UINT64 TriggerTime;
- LIST_ENTRY *Link;
- IEVENT *Event2;
-
- ASSERT_LOCKED (&mEfiTimerLock);
-
- //
- // Get the timer's trigger time
- //
- TriggerTime = Event->Timer.TriggerTime;
-
- //
- // Insert the timer into the timer database in assending sorted order
- //
- for (Link = mEfiTimerList.ForwardLink; Link != &mEfiTimerList; Link = Link->ForwardLink) {
- Event2 = CR (Link, IEVENT, Timer.Link, EVENT_SIGNATURE);
-
- if (Event2->Timer.TriggerTime > TriggerTime) {
- break;
- }
- }
-
- InsertTailList (Link, &Event->Timer.Link);
-}
-
-/**
- Returns the current system time.
-
- @return The current system time
-
-**/
-UINT64
-CoreCurrentSystemTime (
- VOID
- )
-{
- UINT64 SystemTime;
-
- CoreAcquireLock (&mEfiSystemTimeLock);
- SystemTime = mEfiSystemTime;
- CoreReleaseLock (&mEfiSystemTimeLock);
-
- return SystemTime;
-}
-
-/**
- Checks the sorted timer list against the current system time.
- Signals any expired event timer.
-
- @param CheckEvent Not used
- @param Context Not used
-
-**/
-VOID
-EFIAPI
-CoreCheckTimers (
- IN EFI_EVENT CheckEvent,
- IN VOID *Context
- )
-{
- UINT64 SystemTime;
- IEVENT *Event;
-
- //
- // Check the timer database for expired timers
- //
- CoreAcquireLock (&mEfiTimerLock);
- SystemTime = CoreCurrentSystemTime ();
-
- while (!IsListEmpty (&mEfiTimerList)) {
- Event = CR (mEfiTimerList.ForwardLink, IEVENT, Timer.Link, EVENT_SIGNATURE);
-
- //
- // If this timer is not expired, then we're done
- //
- if (Event->Timer.TriggerTime > SystemTime) {
- break;
- }
-
- //
- // Remove this timer from the timer queue
- //
-
- RemoveEntryList (&Event->Timer.Link);
- Event->Timer.Link.ForwardLink = NULL;
-
- //
- // Signal it
- //
- CoreSignalEvent (Event);
-
- //
- // If this is a periodic timer, set it
- //
- if (Event->Timer.Period != 0) {
- //
- // Compute the timers new trigger time
- //
- Event->Timer.TriggerTime = Event->Timer.TriggerTime + Event->Timer.Period;
-
- //
- // If that's before now, then reset the timer to start from now
- //
- if (Event->Timer.TriggerTime <= SystemTime) {
- Event->Timer.TriggerTime = SystemTime;
- CoreSignalEvent (mEfiCheckTimerEvent);
- }
-
- //
- // Add the timer
- //
- CoreInsertEventTimer (Event);
- }
- }
-
- CoreReleaseLock (&mEfiTimerLock);
-}
-
-/**
- Initializes timer support.
-
-**/
-VOID
-CoreInitializeTimer (
- VOID
- )
-{
- EFI_STATUS Status;
-
- Status = CoreCreateEventInternal (
- EVT_NOTIFY_SIGNAL,
- TPL_HIGH_LEVEL - 1,
- CoreCheckTimers,
- NULL,
- NULL,
- &mEfiCheckTimerEvent
- );
- ASSERT_EFI_ERROR (Status);
-}
-
-/**
- Called by the platform code to process a tick.
-
- @param Duration The number of 100ns elapsed since the last call
- to TimerTick
-
-**/
-VOID
-EFIAPI
-CoreTimerTick (
- IN UINT64 Duration
- )
-{
- IEVENT *Event;
-
- //
- // Check runtiem flag in case there are ticks while exiting boot services
- //
- CoreAcquireLock (&mEfiSystemTimeLock);
-
- //
- // Update the system time
- //
- mEfiSystemTime += Duration;
-
- //
- // If the head of the list is expired, fire the timer event
- // to process it
- //
- if (!IsListEmpty (&mEfiTimerList)) {
- Event = CR (mEfiTimerList.ForwardLink, IEVENT, Timer.Link, EVENT_SIGNATURE);
-
- if (Event->Timer.TriggerTime <= mEfiSystemTime) {
- CoreSignalEvent (mEfiCheckTimerEvent);
- }
- }
-
- CoreReleaseLock (&mEfiSystemTimeLock);
-}
-
-/**
- Sets the type of timer and the trigger time for a timer event.
-
- @param UserEvent The timer event that is to be signaled at the
- specified time
- @param Type The type of time that is specified in
- TriggerTime
- @param TriggerTime The number of 100ns units until the timer
- expires
-
- @retval EFI_SUCCESS The event has been set to be signaled at the
- requested time
- @retval EFI_INVALID_PARAMETER Event or Type is not valid
-
-**/
-EFI_STATUS
-EFIAPI
-CoreSetTimer (
- IN EFI_EVENT UserEvent,
- IN EFI_TIMER_DELAY Type,
- IN UINT64 TriggerTime
- )
-{
- IEVENT *Event;
-
- Event = UserEvent;
-
- if (Event == NULL) {
- return EFI_INVALID_PARAMETER;
- }
-
- if (Event->Signature != EVENT_SIGNATURE) {
- return EFI_INVALID_PARAMETER;
- }
-
- if (((UINT32)Type > TimerRelative) || ((Event->Type & EVT_TIMER) == 0)) {
- return EFI_INVALID_PARAMETER;
- }
-
- CoreAcquireLock (&mEfiTimerLock);
-
- //
- // If the timer is queued to the timer database, remove it
- //
- if (Event->Timer.Link.ForwardLink != NULL) {
- RemoveEntryList (&Event->Timer.Link);
- Event->Timer.Link.ForwardLink = NULL;
- }
-
- Event->Timer.TriggerTime = 0;
- Event->Timer.Period = 0;
-
- if (Type != TimerCancel) {
- if (Type == TimerPeriodic) {
- if (TriggerTime == 0) {
- gTimer->GetTimerPeriod (gTimer, &TriggerTime);
- }
-
- Event->Timer.Period = TriggerTime;
- }
-
- Event->Timer.TriggerTime = CoreCurrentSystemTime () + TriggerTime;
- CoreInsertEventTimer (Event);
-
- if (TriggerTime == 0) {
- CoreSignalEvent (mEfiCheckTimerEvent);
- }
- }
-
- CoreReleaseLock (&mEfiTimerLock);
-
- return EFI_SUCCESS;
-}
+/** @file
+ Core Timer Services
+
+Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "DxeMain.h"
+#include "Event.h"
+
+//
+// Internal data
+//
+
+LIST_ENTRY mEfiTimerList = INITIALIZE_LIST_HEAD_VARIABLE (mEfiTimerList);
+EFI_LOCK mEfiTimerLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_HIGH_LEVEL - 1);
+EFI_EVENT mEfiCheckTimerEvent = NULL;
+
+EFI_LOCK mEfiSystemTimeLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_HIGH_LEVEL);
+UINT64 mEfiSystemTime = 0;
+
+//
+// Timer functions
+//
+
+/**
+ Inserts the timer event.
+
+ @param Event Points to the internal structure of timer event
+ to be installed
+
+**/
+VOID
+CoreInsertEventTimer (
+ IN IEVENT *Event
+ )
+{
+ UINT64 TriggerTime;
+ LIST_ENTRY *Link;
+ IEVENT *Event2;
+
+ ASSERT_LOCKED (&mEfiTimerLock);
+
+ //
+ // Get the timer's trigger time
+ //
+ TriggerTime = Event->Timer.TriggerTime;
+
+ //
+ // Insert the timer into the timer database in assending sorted order
+ //
+ for (Link = mEfiTimerList.ForwardLink; Link != &mEfiTimerList; Link = Link->ForwardLink) {
+ Event2 = CR (Link, IEVENT, Timer.Link, EVENT_SIGNATURE);
+
+ if (Event2->Timer.TriggerTime > TriggerTime) {
+ break;
+ }
+ }
+
+ InsertTailList (Link, &Event->Timer.Link);
+}
+
+/**
+ Returns the current system time.
+
+ @return The current system time
+
+**/
+UINT64
+CoreCurrentSystemTime (
+ VOID
+ )
+{
+ UINT64 SystemTime;
+
+ CoreAcquireLock (&mEfiSystemTimeLock);
+ SystemTime = mEfiSystemTime;
+ CoreReleaseLock (&mEfiSystemTimeLock);
+
+ return SystemTime;
+}
+
+/**
+ Checks the sorted timer list against the current system time.
+ Signals any expired event timer.
+
+ @param CheckEvent Not used
+ @param Context Not used
+
+**/
+VOID
+EFIAPI
+CoreCheckTimers (
+ IN EFI_EVENT CheckEvent,
+ IN VOID *Context
+ )
+{
+ UINT64 SystemTime;
+ IEVENT *Event;
+
+ //
+ // Check the timer database for expired timers
+ //
+ CoreAcquireLock (&mEfiTimerLock);
+ SystemTime = CoreCurrentSystemTime ();
+
+ while (!IsListEmpty (&mEfiTimerList)) {
+ Event = CR (mEfiTimerList.ForwardLink, IEVENT, Timer.Link, EVENT_SIGNATURE);
+
+ //
+ // If this timer is not expired, then we're done
+ //
+ if (Event->Timer.TriggerTime > SystemTime) {
+ break;
+ }
+
+ //
+ // Remove this timer from the timer queue
+ //
+
+ RemoveEntryList (&Event->Timer.Link);
+ Event->Timer.Link.ForwardLink = NULL;
+
+ //
+ // Signal it
+ //
+ CoreSignalEvent (Event);
+
+ //
+ // If this is a periodic timer, set it
+ //
+ if (Event->Timer.Period != 0) {
+ //
+ // Compute the timers new trigger time
+ //
+ Event->Timer.TriggerTime = Event->Timer.TriggerTime + Event->Timer.Period;
+
+ //
+ // If that's before now, then reset the timer to start from now
+ //
+ if (Event->Timer.TriggerTime <= SystemTime) {
+ Event->Timer.TriggerTime = SystemTime;
+ CoreSignalEvent (mEfiCheckTimerEvent);
+ }
+
+ //
+ // Add the timer
+ //
+ CoreInsertEventTimer (Event);
+ }
+ }
+
+ CoreReleaseLock (&mEfiTimerLock);
+}
+
+/**
+ Initializes timer support.
+
+**/
+VOID
+CoreInitializeTimer (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+
+ Status = CoreCreateEventInternal (
+ EVT_NOTIFY_SIGNAL,
+ TPL_HIGH_LEVEL - 1,
+ CoreCheckTimers,
+ NULL,
+ NULL,
+ &mEfiCheckTimerEvent
+ );
+ ASSERT_EFI_ERROR (Status);
+}
+
+/**
+ Called by the platform code to process a tick.
+
+ @param Duration The number of 100ns elapsed since the last call
+ to TimerTick
+
+**/
+VOID
+EFIAPI
+CoreTimerTick (
+ IN UINT64 Duration
+ )
+{
+ IEVENT *Event;
+
+ //
+ // Check runtiem flag in case there are ticks while exiting boot services
+ //
+ CoreAcquireLock (&mEfiSystemTimeLock);
+
+ //
+ // Update the system time
+ //
+ mEfiSystemTime += Duration;
+
+ //
+ // If the head of the list is expired, fire the timer event
+ // to process it
+ //
+ if (!IsListEmpty (&mEfiTimerList)) {
+ Event = CR (mEfiTimerList.ForwardLink, IEVENT, Timer.Link, EVENT_SIGNATURE);
+
+ if (Event->Timer.TriggerTime <= mEfiSystemTime) {
+ CoreSignalEvent (mEfiCheckTimerEvent);
+ }
+ }
+
+ CoreReleaseLock (&mEfiSystemTimeLock);
+}
+
+/**
+ Sets the type of timer and the trigger time for a timer event.
+
+ @param UserEvent The timer event that is to be signaled at the
+ specified time
+ @param Type The type of time that is specified in
+ TriggerTime
+ @param TriggerTime The number of 100ns units until the timer
+ expires
+
+ @retval EFI_SUCCESS The event has been set to be signaled at the
+ requested time
+ @retval EFI_INVALID_PARAMETER Event or Type is not valid
+
+**/
+EFI_STATUS
+EFIAPI
+CoreSetTimer (
+ IN EFI_EVENT UserEvent,
+ IN EFI_TIMER_DELAY Type,
+ IN UINT64 TriggerTime
+ )
+{
+ IEVENT *Event;
+
+ Event = UserEvent;
+
+ if (Event == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Event->Signature != EVENT_SIGNATURE) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (((UINT32)Type > TimerRelative) || ((Event->Type & EVT_TIMER) == 0)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ CoreAcquireLock (&mEfiTimerLock);
+
+ //
+ // If the timer is queued to the timer database, remove it
+ //
+ if (Event->Timer.Link.ForwardLink != NULL) {
+ RemoveEntryList (&Event->Timer.Link);
+ Event->Timer.Link.ForwardLink = NULL;
+ }
+
+ Event->Timer.TriggerTime = 0;
+ Event->Timer.Period = 0;
+
+ if (Type != TimerCancel) {
+ if (Type == TimerPeriodic) {
+ if (TriggerTime == 0) {
+ gTimer->GetTimerPeriod (gTimer, &TriggerTime);
+ }
+
+ Event->Timer.Period = TriggerTime;
+ }
+
+ Event->Timer.TriggerTime = CoreCurrentSystemTime () + TriggerTime;
+ CoreInsertEventTimer (Event);
+
+ if (TriggerTime == 0) {
+ CoreSignalEvent (mEfiCheckTimerEvent);
+ }
+ }
+
+ CoreReleaseLock (&mEfiTimerLock);
+
+ return EFI_SUCCESS;
+}
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