mirror of https://github.com/acidanthera/audk.git
150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/** @file
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Entry point to a EFI/DXE driver.
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Copyright (c) 2006 - 2007, Intel Corporation<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Uefi.h>
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#include <Protocol/LoadedImage.h>
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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/**
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Unload function that is registered in the LoadImage protocol. It un-installs
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protocols produced and deallocates pool used by the driver. Called by the core
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when unloading the driver.
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@param ImageHandle ImageHandle of the loaded driver.
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@return Status returned by all unload().
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**/
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EFI_STATUS
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EFIAPI
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_DriverUnloadHandler (
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EFI_HANDLE ImageHandle
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)
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{
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EFI_STATUS Status;
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//
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// If an UnloadImage() handler is specified, then call it
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//
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Status = ProcessModuleUnloadList (ImageHandle);
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//
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// If the driver specific unload handler does not return an error, then call all of the
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// library destructors. If the unload handler returned an error, then the driver can not be
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// unloaded, and the library destructors should not be called
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//
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if (!EFI_ERROR (Status)) {
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ProcessLibraryDestructorList (ImageHandle, gST);
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}
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//
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// Return the status from the driver specific unload handler
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//
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return Status;
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}
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/**
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Enrty point to DXE Driver.
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@param ImageHandle ImageHandle of the loaded driver.
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@param SystemTable Pointer to the EFI System Table.
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@retval EFI_SUCCESS One or more of the drivers returned a success code.
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@retval !EFI_SUCESS The return status from the last driver entry point in the list.
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**/
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EFI_STATUS
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EFIAPI
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_ModuleEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
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if (_gUefiDriverRevision != 0) {
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//
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// Make sure that the EFI/UEFI spec revision of the platform is >= EFI/UEFI spec revision of the driver
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//
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if (SystemTable->Hdr.Revision < _gUefiDriverRevision) {
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return EFI_INCOMPATIBLE_VERSION;
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}
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}
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//
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// Call constructor for all libraries
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//
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ProcessLibraryConstructorList (ImageHandle, SystemTable);
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//
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// Install unload handler...
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//
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if (_gDriverUnloadImageCount != 0) {
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Status = gBS->HandleProtocol (
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ImageHandle,
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&gEfiLoadedImageProtocolGuid,
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(VOID **)&LoadedImage
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);
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ASSERT_EFI_ERROR (Status);
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LoadedImage->Unload = _DriverUnloadHandler;
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}
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//
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// Call the driver entry point
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//
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Status = ProcessModuleEntryPointList (ImageHandle, SystemTable);
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//
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// If all of the drivers returned errors, then invoke all of the library destructors
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//
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if (EFI_ERROR (Status)) {
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ProcessLibraryDestructorList (ImageHandle, SystemTable);
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}
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//
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// Return the cummalative return status code from all of the driver entry points
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//
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return Status;
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}
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/**
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Enrty point wrapper of DXE Driver.
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@param ImageHandle ImageHandle of the loaded driver.
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@param SystemTable Pointer to the EFI System Table.
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@retval EFI_SUCCESS One or more of the drivers returned a success code.
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@retval !EFI_SUCESS The return status from the last driver entry point in the list.
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**/
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EFI_STATUS
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EFIAPI
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EfiMain (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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return _ModuleEntryPoint (ImageHandle, SystemTable);
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}
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