MdePkg: Move to new location

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Guo Mang <mang.guo@intel.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/Core/MdePkg/Include/Protocol/VariableWrite.h b/Core/MdePkg/Include/Protocol/VariableWrite.h
new file mode 100644
index 0000000000..5a4c15852d
--- /dev/null
+++ b/Core/MdePkg/Include/Protocol/VariableWrite.h
@@ -0,0 +1,45 @@
+/** @file

+  Variable Write Architectural Protocol as defined in PI Specification VOLUME 2 DXE

+

+  This provides the services required to set nonvolatile environment variables. 

+  This protocol must be produced by a runtime DXE driver and may be consumed only 

+  by the DXE Foundation.

+

+  The DXE driver that produces this protocol must be a runtime driver. This driver 

+  may update the SetVariable() field of the UEFI Runtime Services Table.

+  

+  After the UEFI Runtime Services Table has been initialized, the driver must 

+  install the EFI_VARIABLE_WRITE_ARCH_PROTOCOL_GUID on a new handle with a NULL 

+  interface pointer. The installation of this protocol informs the DXE Foundation 

+  that the write services for nonvolatile environment variables are now available 

+  and that the DXE Foundation must update the 32-bit CRC of the UEFI Runtime Services 

+  Table. The full complement of environment variable services are not available 

+  until both this protocol and EFI_VARIABLE_ARCH_PROTOCOL are installed. DXE drivers 

+  that require read-only access or read/write access to volatile environment variables

+  must have the EFI_VARIABLE_WRITE_ARCH_PROTOCOL in their dependency expressions.

+  DXE drivers that require write access to nonvolatile environment variables must 

+  have this architectural protocol in their dependency expressions.  

+  

+  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.             

+

+**/

+

+#ifndef __ARCH_PROTOCOL_VARIABLE_WRITE_ARCH_H__

+#define __ARCH_PROTOCOL_VARIABLE_WRITE_ARCH_H__

+

+///

+/// Global ID for the Variable Write Architectural Protocol

+///

+#define EFI_VARIABLE_WRITE_ARCH_PROTOCOL_GUID \

+  { 0x6441f818, 0x6362, 0x4e44, {0xb5, 0x70, 0x7d, 0xba, 0x31, 0xdd, 0x24, 0x53 } }

+

+extern EFI_GUID gEfiVariableWriteArchProtocolGuid;

+

+#endif