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/** @file
Entry point to a EFI/DXE driver.
Copyright (c) 2006, Intel Corporation<BR>
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.
**/
EFI_EVENT _mDriverExitBootServicesNotifyEvent;
/**
Unload function that is registered in the LoadImage protocol. It un-installs
protocols produced and deallocates pool used by the driver. Called by the core
when unloading the driver.
@param ImageHandle
@retval EFI_SUCCESS
**/
STATIC
EFI_STATUS
EFIAPI
_DriverUnloadHandler (
EFI_HANDLE ImageHandle
)
{
EFI_STATUS Status;
//
// If an UnloadImage() handler is specified, then call it
//
Status = ProcessModuleUnloadList (ImageHandle);
//
// If the driver specific unload handler does not return an error, then call all of the
// library destructors. If the unload handler returned an error, then the driver can not be
// unloaded, and the library destructors should not be called
//
if (!EFI_ERROR (Status)) {
//
// Close our ExitBootServices () notify function
//
if (_gDriverExitBootServicesEvent[0] != NULL) {
Status = gBS->CloseEvent (_mDriverExitBootServicesNotifyEvent);
ASSERT_EFI_ERROR (Status);
}
ProcessLibraryDestructorList (ImageHandle, gST);
}
//
// Return the status from the driver specific unload handler
//
return Status;
}
/**
Notification Entry of ExitBootService event. In the entry, all notifications in _gDriverExitBootServicesEvent[]
would be invoked.
@param Event The Event that is being processed.
@param Context Event Context.
**/
STATIC
VOID
EFIAPI
_DriverExitBootServices (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_EVENT_NOTIFY ChildNotifyEventHandler;
UINTN Index;
for (Index = 0; _gDriverExitBootServicesEvent[Index] != NULL; Index++) {
ChildNotifyEventHandler = _gDriverExitBootServicesEvent[Index];
ChildNotifyEventHandler (Event, NULL);
}
}
/**
Enrty point to DXE Driver.
@param ImageHandle ImageHandle of the loaded driver.
@param SystemTable Pointer to the EFI System Table.
@retval EFI_SUCCESS One or more of the drivers returned a success code.
@retval !EFI_SUCESS The return status from the last driver entry point in the list.
**/
EFI_STATUS
EFIAPI
_ModuleEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
if (_gUefiDriverRevision != 0) {
//
// Make sure that the EFI/UEFI spec revision of the platform is >= EFI/UEFI spec revision of the driver
//
if (SystemTable->Hdr.Revision < _gUefiDriverRevision) {
return EFI_INCOMPATIBLE_VERSION;
}
}
//
// Call constructor for all libraries
//
ProcessLibraryConstructorList (ImageHandle, SystemTable);
//
// Register our ExitBootServices () notify function
//
if (_gDriverExitBootServicesEvent[0] != NULL) {
Status = gBS->CreateEvent (
EVT_SIGNAL_EXIT_BOOT_SERVICES,
TPL_NOTIFY,
_DriverExitBootServices,
NULL,
&_mDriverExitBootServicesNotifyEvent
);
ASSERT_EFI_ERROR (Status);
}
//
// Install unload handler...
//
if (_gDriverUnloadImageCount != 0) {
Status = gBS->HandleProtocol (
ImageHandle,
&gEfiLoadedImageProtocolGuid,
(VOID **)&LoadedImage
);
ASSERT_EFI_ERROR (Status);
LoadedImage->Unload = _DriverUnloadHandler;
}
//
// Call the driver entry point
//
Status = ProcessModuleEntryPointList (ImageHandle, SystemTable);
//
// If all of the drivers returned errors, then invoke all of the library destructors
//
if (EFI_ERROR (Status)) {
//
// Close our ExitBootServices () notify function
//
if (_gDriverExitBootServicesEvent[0] != NULL) {
Status = gBS->CloseEvent (_mDriverExitBootServicesNotifyEvent);
ASSERT_EFI_ERROR (Status);
}
ProcessLibraryDestructorList (ImageHandle, SystemTable);
}
//
// Return the cummalative return status code from all of the driver entry points
//
return Status;
}
/**
Enrty point wrapper of DXE Driver.
@param ImageHandle ImageHandle of the loaded driver.
@param SystemTable Pointer to the EFI System Table.
@retval EFI_SUCCESS One or more of the drivers returned a success code.
@retval !EFI_SUCESS The return status from the last driver entry point in the list.
**/
EFI_STATUS
EFIAPI
EfiMain (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
return _ModuleEntryPoint (ImageHandle, SystemTable);
}
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