mirror of https://github.com/acidanthera/audk.git
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/** @file
|
|
This library implement library class DxeServiceTableLib.
|
|
It produce EFI_DXE_SERVICE pointer in global variable gDS in library's constructure.
|
|
|
|
A DXE driver can use gDS pointer to access services in EFI_DXE_SERVICE, if this
|
|
DXE driver declare that use DxeServicesTableLib library class and link to this
|
|
library instance.
|
|
|
|
Please attention this library instance can not be used util EFI_SYSTEM_TABLE was
|
|
initialized.
|
|
|
|
This library contains contruct function to retrieve EFI_DXE_SERIVCE, this construct
|
|
function will be invoked in DXE driver's autogen file.
|
|
|
|
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
|
|
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.
|
|
|
|
**/
|
|
|
|
#include <PiDxe.h>
|
|
#include <Guid/DxeServices.h>
|
|
#include <Library/DxeServicesTableLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/UefiLib.h>
|
|
|
|
//
|
|
// Cache copy of the DXE Services Table
|
|
//
|
|
EFI_DXE_SERVICES *gDS = NULL;
|
|
|
|
/**
|
|
The constructor function caches the pointer of DXE Services Table.
|
|
|
|
The constructor function caches the pointer of DXE Services Table.
|
|
It will ASSERT() if that operation fails.
|
|
It will ASSERT() if the pointer of DXE Services Table is NULL.
|
|
It will always return EFI_SUCCESS.
|
|
|
|
@param ImageHandle The firmware allocated handle for the EFI image.
|
|
@param SystemTable A pointer to the EFI System Table.
|
|
|
|
@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
DxeServicesTableLibConstructor (
|
|
IN EFI_HANDLE ImageHandle,
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
//
|
|
// Cache copy of the DXE Services Table
|
|
//
|
|
Status = EfiGetSystemConfigurationTable (&gEfiDxeServicesTableGuid, (VOID **) &gDS);
|
|
ASSERT_EFI_ERROR (Status);
|
|
ASSERT (gDS != NULL);
|
|
|
|
return Status;
|
|
}
|