diff options
| author | Guo Mang <mang.guo@intel.com> | 2016-12-22 15:57:14 +0800 |
|---|---|---|
| committer | Guo Mang <mang.guo@intel.com> | 2016-12-26 19:14:41 +0800 |
| commit | 1760cf81e4b1847c6823ea3514a78dd120e19b6e (patch) | |
| tree | 64a874b14050fe24d3bbc1bc13cd293abf8ae018 /Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c | |
| parent | 7f05fa00f73038b425002566d3afe6c3ade2ccdb (diff) | |
| download | edk2-platforms-1760cf81e4b1847c6823ea3514a78dd120e19b6e.tar.xz | |
MdePkg: Move to new location
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Guo Mang <mang.guo@intel.com>
Diffstat (limited to 'Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c')
| -rw-r--r-- | Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c b/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c new file mode 100644 index 0000000000..7cb94cee70 --- /dev/null +++ b/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c @@ -0,0 +1,68 @@ +/** @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;
+}
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