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Diffstat (limited to 'EDK/Foundation/Library/Dxe/EfiDriverLib/Event.c')
| -rw-r--r-- | EDK/Foundation/Library/Dxe/EfiDriverLib/Event.c | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/Dxe/EfiDriverLib/Event.c b/EDK/Foundation/Library/Dxe/EfiDriverLib/Event.c new file mode 100644 index 0000000..c341d82 --- /dev/null +++ b/EDK/Foundation/Library/Dxe/EfiDriverLib/Event.c @@ -0,0 +1,371 @@ +/*++ + +Copyright (c) 2004 - 2006, Intel Corporation +All rights reserved. This program and the accompanying materials +are licensed and made available under the terms and conditions of the BSD License +which 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: + + Event.c + +Abstract: + + Support for Event lib fucntions. + +--*/ + +#include "Tiano.h" +#include "EfiDriverLib.h" + +EFI_EVENT +EfiLibCreateProtocolNotifyEvent ( + IN EFI_GUID *ProtocolGuid, + IN EFI_TPL NotifyTpl, + IN EFI_EVENT_NOTIFY NotifyFunction, + IN VOID *NotifyContext, + OUT VOID **Registration + ) +/*++ + +Routine Description: + + Create a protocol notification event and return it. + +Arguments: + + ProtocolGuid - Protocol to register notification event on. + + NotifyTpl - Maximum TPL to single the NotifyFunction. + + NotifyFunction - EFI notification routine. + + NotifyContext - Context passed into Event when it is created. + + Registration - Registration key returned from RegisterProtocolNotify(). + +Returns: + + The EFI_EVENT that has been registered to be signaled when a ProtocolGuid + is added to the system. + +--*/ +{ + EFI_STATUS Status; + EFI_EVENT Event; + + // + // Create the event + // + + Status = gBS->CreateEvent ( + EFI_EVENT_NOTIFY_SIGNAL, + NotifyTpl, + NotifyFunction, + NotifyContext, + &Event + ); + ASSERT (!EFI_ERROR (Status)); + + // + // Register for protocol notifactions on this event + // + + Status = gBS->RegisterProtocolNotify ( + ProtocolGuid, + Event, + Registration + ); + + ASSERT (!EFI_ERROR (Status)); + + // + // Kick the event so we will perform an initial pass of + // current installed drivers + // + + gBS->SignalEvent (Event); + return Event; +} + +EFI_STATUS +EfiLibNamedEventListen ( + IN EFI_GUID * Name, + IN EFI_TPL NotifyTpl, + IN EFI_EVENT_NOTIFY NotifyFunction, + IN VOID *NotifyContext + ) +/*++ + +Routine Description: + Listenes to signals on the name. + EfiLibNamedEventSignal() signals the event. + + NOTE: For now, the named listening/signalling is implemented + on a protocol interface being installed and uninstalled. + In the future, this maybe implemented based on a dedicated mechanism. + +Arguments: + Name - Name to register the listener on. + NotifyTpl - Maximum TPL to singnal the NotifyFunction. + NotifyFunction - The listener routine. + NotifyContext - Context passed into the listener routine. + +Returns: + EFI_SUCCESS if successful. + +--*/ +{ + EFI_STATUS Status; + EFI_EVENT Event; + VOID *RegistrationLocal; + + // + // Create event + // + Status = gBS->CreateEvent ( + EFI_EVENT_NOTIFY_SIGNAL, + NotifyTpl, + NotifyFunction, + NotifyContext, + &Event + ); + ASSERT_EFI_ERROR (Status); + + Status = gBS->RegisterProtocolNotify ( + Name, + Event, + &RegistrationLocal + ); + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} + +EFI_STATUS +EfiLibNamedEventSignal ( + IN EFI_GUID *Name + ) +/*++ + +Routine Description: + Signals a named event. All registered listeners will run. + The listeners should register using EfiLibNamedEventListen() function. + + NOTE: For now, the named listening/signalling is implemented + on a protocol interface being installed and uninstalled. + In the future, this maybe implemented based on a dedicated mechanism. + +Arguments: + Name - Name to perform the signaling on. The name is a GUID. + +Returns: + EFI_SUCCESS if successfull. + +--*/ +{ + EFI_STATUS Status; + EFI_HANDLE Handle; + + Handle = NULL; + Status = gBS->InstallProtocolInterface ( + &Handle, + Name, + EFI_NATIVE_INTERFACE, + NULL + ); + ASSERT_EFI_ERROR (Status); + + Status = gBS->UninstallProtocolInterface ( + Handle, + Name, + NULL + ); + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} + +#if (EFI_SPECIFICATION_VERSION >= 0x00020000) + +static +VOID +EFIAPI +EventNotifySignalAllNullEvent ( + IN EFI_EVENT Event, + IN VOID *Context + ) +{ + // + // This null event is a size efficent way to enusre that + // EFI_EVENT_NOTIFY_SIGNAL_ALL is error checked correctly. + // EFI_EVENT_NOTIFY_SIGNAL_ALL is now mapped into + // CreateEventEx() and this function is used to make the + // old error checking in CreateEvent() for Tiano extensions + // function. + // + return; +} + +#endif + +EFI_STATUS +EFIAPI +EfiCreateEventLegacyBoot ( + IN EFI_TPL NotifyTpl, + IN EFI_EVENT_NOTIFY NotifyFunction, + IN VOID *NotifyContext, + OUT EFI_EVENT *LegacyBootEvent + ) +/*++ + +Routine Description: + Create a Legacy Boot Event. + Tiano extended the CreateEvent Type enum to add a legacy boot event type. + This was bad as Tiano did not own the enum. In UEFI 2.0 CreateEventEx was + added and now it's possible to not voilate the UEFI specification by + declaring a GUID for the legacy boot event class. This library supports + the R8.5/EFI 1.10 form and R8.6/UEFI 2.0 form and allows common code to + work both ways. + +Arguments: + LegacyBootEvent Returns the EFI event returned from gBS->CreateEvent(Ex) + +Returns: + EFI_SUCCESS Event was created. + Other Event was not created. + +--*/ +{ + EFI_STATUS Status; + UINT32 EventType; + EFI_EVENT_NOTIFY WorkerNotifyFunction; + +#if (EFI_SPECIFICATION_VERSION < 0x00020000) + + if (NotifyFunction == NULL) { + EventType = EFI_EVENT_SIGNAL_LEGACY_BOOT | EFI_EVENT_NOTIFY_SIGNAL_ALL; + } else { + EventType = EFI_EVENT_SIGNAL_LEGACY_BOOT; + } + WorkerNotifyFunction = NotifyFunction; + + // + // prior to UEFI 2.0 use Tiano extension to EFI + // + Status = gBS->CreateEvent ( + EventType, + NotifyTpl, + WorkerNotifyFunction, + NotifyContext, + LegacyBootEvent + ); +#else + + EventType = EFI_EVENT_NOTIFY_SIGNAL; + if (NotifyFunction == NULL) { + // + // CreatEventEx will check NotifyFunction is NULL or not + // + WorkerNotifyFunction = EventNotifySignalAllNullEvent; + } else { + WorkerNotifyFunction = NotifyFunction; + } + + // + // For UEFI 2.0 and the future use an Event Group + // + Status = gBS->CreateEventEx ( + EventType, + NotifyTpl, + WorkerNotifyFunction, + NotifyContext, + &gEfiEventLegacyBootGuid, + LegacyBootEvent + ); +#endif + return Status; +} + +EFI_STATUS +EFIAPI +EfiCreateEventReadyToBoot ( + IN EFI_TPL NotifyTpl, + IN EFI_EVENT_NOTIFY NotifyFunction, + IN VOID *NotifyContext, + OUT EFI_EVENT *ReadyToBootEvent + ) +/*++ + +Routine Description: + Create a Read to Boot Event. + + Tiano extended the CreateEvent Type enum to add a ready to boot event type. + This was bad as Tiano did not own the enum. In UEFI 2.0 CreateEventEx was + added and now it's possible to not voilate the UEFI specification and use + the ready to boot event class defined in UEFI 2.0. This library supports + the R8.5/EFI 1.10 form and R8.6/UEFI 2.0 form and allows common code to + work both ways. + +Arguments: + @param LegacyBootEvent Returns the EFI event returned from gBS->CreateEvent(Ex) + +Return: + EFI_SUCCESS - Event was created. + Other - Event was not created. + +--*/ +{ + EFI_STATUS Status; + UINT32 EventType; + EFI_EVENT_NOTIFY WorkerNotifyFunction; + +#if (EFI_SPECIFICATION_VERSION < 0x00020000) + + if (NotifyFunction == NULL) { + EventType = EFI_EVENT_SIGNAL_READY_TO_BOOT | EFI_EVENT_NOTIFY_SIGNAL_ALL; + } else { + EventType = EFI_EVENT_SIGNAL_READY_TO_BOOT; + } + WorkerNotifyFunction = NotifyFunction; + + // + // prior to UEFI 2.0 use Tiano extension to EFI + // + Status = gBS->CreateEvent ( + EventType, + NotifyTpl, + WorkerNotifyFunction, + NotifyContext, + ReadyToBootEvent + ); +#else + + EventType = EFI_EVENT_NOTIFY_SIGNAL; + if (NotifyFunction == NULL) { + // + // CreatEventEx will check NotifyFunction is NULL or not + // + WorkerNotifyFunction = EventNotifySignalAllNullEvent; + } else { + WorkerNotifyFunction = NotifyFunction; + } + + // + // For UEFI 2.0 and the future use an Event Group + // + Status = gBS->CreateEventEx ( + EventType, + NotifyTpl, + WorkerNotifyFunction, + NotifyContext, + &gEfiEventReadyToBootGuid, + ReadyToBootEvent + ); +#endif + return Status; +} |