MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c File Reference


Functions

EFI_STATUS EFIAPI DxeServicesTableLibConstructor (IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable)

Variables

EFI_DXE_SERVICESgDS = NULL

Detailed Description

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.
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.


Function Documentation

EFI_STATUS EFIAPI DxeServicesTableLibConstructor ( IN EFI_HANDLE  ImageHandle,
IN EFI_SYSTEM_TABLE SystemTable 
)

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.

Parameters:
ImageHandle The firmware allocated handle for the EFI image.
SystemTable A pointer to the EFI System Table.
Return values:
EFI_SUCCESS The constructor always returns EFI_SUCCESS.

References ASSERT, ASSERT_EFI_ERROR, EfiGetSystemConfigurationTable(), gEfiDxeServicesTableGuid, NULL, and VOID.


Variable Documentation

Cache copy of the DXE Services Table

Referenced by PciExpressRegisterForRuntimeAccess().


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