mirror of
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e561879137
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7228 6f19259b-4bc3-4df7-8a09-765794883524
135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
/** @file
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The variable data structures are related to EDK II specific UEFI variable implementation.
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Variable data header and Variable storage region header are defined here.
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Copyright (c) 2006 - 2008 Intel Corporation. <BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef __VARIABLE_FORMAT_H__
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#define __VARIABLE_FORMAT_H__
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///
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/// Alignment of variable name and data.
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/// For IA32/X64 architecture, the alignment is set to 1, and 8 is for IPF archtecture.
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///
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#if defined (MDE_CPU_IPF)
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#define ALIGNMENT 8
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#else
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#define ALIGNMENT 1
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#endif
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//
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// Define GET_PAD_SIZE to optimize compiler
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//
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#if ((ALIGNMENT == 0) || (ALIGNMENT == 1))
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#define GET_PAD_SIZE(a) (0)
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#else
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#define GET_PAD_SIZE(a) (((~a) + 1) & (ALIGNMENT - 1))
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#endif
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///
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/// Alignment of Variable Data Header in Variable Store region
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///
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#define HEADER_ALIGNMENT 4
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#define HEADER_ALIGN(Header) (((UINTN) (Header) + HEADER_ALIGNMENT - 1) & (~(HEADER_ALIGNMENT - 1)))
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///
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/// Status of Variable Store Region
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///
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typedef enum {
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EfiRaw,
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EfiValid,
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EfiInvalid,
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EfiUnknown
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} VARIABLE_STORE_STATUS;
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#pragma pack(1)
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#define VARIABLE_STORE_SIGNATURE SIGNATURE_32 ('$', 'V', 'S', 'S')
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///
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/// Variable Store Header Format and State
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///
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#define VARIABLE_STORE_FORMATTED 0x5a
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#define VARIABLE_STORE_HEALTHY 0xfe
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///
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/// Variable Store region header
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///
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typedef struct {
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///
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/// Variable store region signature.
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///
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UINT32 Signature;
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///
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/// Size of variable store region including this header
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///
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UINT32 Size;
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///
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/// variable region format state
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///
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UINT8 Format;
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///
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/// variable region healthy state
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///
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UINT8 State;
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UINT16 Reserved;
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UINT32 Reserved1;
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} VARIABLE_STORE_HEADER;
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///
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/// Variable data start flag
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///
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#define VARIABLE_DATA 0x55AA
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///
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/// Variable State flags
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///
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#define VAR_IN_DELETED_TRANSITION 0xfe ///< Variable is in obsolete transistion
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#define VAR_DELETED 0xfd ///< Variable is obsolete
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#define VAR_HEADER_VALID_ONLY 0x7f ///< Variable header has been valid
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#define VAR_ADDED 0x3f ///< Variable has been completely added
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///
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/// Single Variable Data Header Structure
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///
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typedef struct {
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///
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/// Variable Data Start Flag
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///
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UINT16 StartId;
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///
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/// Variable State defined above
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///
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UINT8 State;
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UINT8 Reserved;
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///
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/// Attributes of variable defined in UEFI spec
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///
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UINT32 Attributes;
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///
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/// Size of variable Null-terminated Unicode string name
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///
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UINT32 NameSize;
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///
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/// Size of the variable data without this header
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///
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UINT32 DataSize;
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///
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/// A unique identifier for the vendor that produce and consume this varaible.
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///
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EFI_GUID VendorGuid;
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} VARIABLE_HEADER;
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#pragma pack()
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#endif // _EFI_VARIABLE_H_
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