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d1f95000 | 1 | /** @file\r |
0f82bd55 | 2 | Variable Architectural Protocol as defined in PI Specification VOLUME 2 DXE\r |
d1f95000 | 3 | \r |
8377875b | 4 | This provides the services required to get and set environment variables. This \r |
5 | protocol must be produced by a runtime DXE driver and may be consumed only by \r | |
6 | the DXE Foundation. The DXE driver that produces this protocol must be a runtime \r | |
7 | driver. This driver is responsible for initializing the GetVariable(), \r | |
8 | GetNextVariableName(), and SetVariable() fields of the UEFI Runtime Services Table.\r | |
d1f95000 | 9 | \r |
8377875b | 10 | After the three fields of the UEFI Runtime Services Table have been initialized, \r |
11 | the driver must install the EFI_VARIABLE_ARCH_PROTOCOL_GUID on a new handle with \r | |
12 | a NULL interface pointer. The installation of this protocol informs the DXE Foundation \r | |
13 | that the read-only and the volatile environment variable related services are \r | |
14 | now available and that the DXE Foundation must update the 32-bit CRC of the UEFI \r | |
15 | Runtime Services Table. The full complement of environment variable services are \r | |
16 | not available until both this protocol and EFI_VARIABLE_WRITE_ARCH_PROTOCOL are \r | |
17 | installed. DXE drivers that require read-only access or read/write access to volatile \r | |
18 | environment variables must have this architectural protocol in their dependency \r | |
19 | expressions. DXE drivers that require write access to nonvolatile environment \r | |
20 | variables must have the EFI_VARIABLE_WRITE_ARCH_PROTOCOL in their dependency \r | |
21 | expressions.\r | |
d1f95000 | 22 | \r |
4ca9b6c4 | 23 | Copyright (c) 2006 - 2008, Intel Corporation \r |
d1f95000 | 24 | All rights reserved. This program and the accompanying materials \r |
25 | are licensed and made available under the terms and conditions of the BSD License \r | |
26 | which accompanies this distribution. The full text of the license may be found at \r | |
27 | http://opensource.org/licenses/bsd-license.php \r | |
28 | \r | |
29 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
30 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
31 | \r | |
d1f95000 | 32 | **/\r |
33 | \r | |
34 | #ifndef __ARCH_PROTOCOL_VARIABLE_ARCH_H__\r | |
35 | #define __ARCH_PROTOCOL_VARIABLE_ARCH_H__\r | |
36 | \r | |
99e8ed21 | 37 | ///\r |
38 | /// Global ID for the Variable Architectural Protocol\r | |
39 | ///\r | |
d1f95000 | 40 | #define EFI_VARIABLE_ARCH_PROTOCOL_GUID \\r |
41 | { 0x1e5668e2, 0x8481, 0x11d4, {0xbc, 0xf1, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } }\r | |
42 | \r | |
43 | extern EFI_GUID gEfiVariableArchProtocolGuid;\r | |
44 | \r | |
45 | #endif \r |