diff options
Diffstat (limited to 'MdePkg/Include/Protocol/VariableWrite.h')
| -rw-r--r-- | MdePkg/Include/Protocol/VariableWrite.h | 40 |
1 files changed, 17 insertions, 23 deletions
diff --git a/MdePkg/Include/Protocol/VariableWrite.h b/MdePkg/Include/Protocol/VariableWrite.h index 96971d9e85860..9131e1945ec47 100644 --- a/MdePkg/Include/Protocol/VariableWrite.h +++ b/MdePkg/Include/Protocol/VariableWrite.h @@ -1,33 +1,27 @@ /** @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 + 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 + 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 + + 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. + DXE drivers that require write access to nonvolatile environment variables must + have this architectural protocol in their dependency expressions. + + Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent **/ @@ -42,4 +36,4 @@ extern EFI_GUID gEfiVariableWriteArchProtocolGuid; -#endif +#endif |