diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/Variable.h')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/Variable.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/Variable.h b/src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/Variable.h new file mode 100644 index 00000000..c2093447 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/Variable.h @@ -0,0 +1,39 @@ +/** @file + Variable Architectural Protocol as defined in PI Specification VOLUME 2 DXE + + This provides the services required to get and set 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 is responsible for initializing the GetVariable(), + GetNextVariableName(), and SetVariable() fields of the UEFI Runtime Services Table. + + After the three fields of the UEFI Runtime Services Table have been initialized, + the driver must install the EFI_VARIABLE_ARCH_PROTOCOL_GUID on a new handle with + a NULL interface pointer. The installation of this protocol informs the DXE Foundation + that the read-only and the volatile environment variable related services 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_WRITE_ARCH_PROTOCOL are + installed. DXE drivers that require read-only access or read/write access to volatile + environment variables must have this architectural protocol in their dependency + expressions. DXE drivers that require write access to nonvolatile environment + variables must have the EFI_VARIABLE_WRITE_ARCH_PROTOCOL in their dependency + expressions. + + Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#ifndef __ARCH_PROTOCOL_VARIABLE_ARCH_H__ +#define __ARCH_PROTOCOL_VARIABLE_ARCH_H__ + +/// +/// Global ID for the Variable Architectural Protocol +/// +#define EFI_VARIABLE_ARCH_PROTOCOL_GUID \ + { 0x1e5668e2, 0x8481, 0x11d4, {0xbc, 0xf1, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } } + +extern EFI_GUID gEfiVariableArchProtocolGuid; + +#endif |