0c18794ea4
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12261 6f19259b-4bc3-4df7-8a09-765794883524
175 lines
5.1 KiB
C
175 lines
5.1 KiB
C
/** @file
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The variable data structures are related to EDKII-specific
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implementation of UEFI authenticated variables.
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AuthenticatedVariableFormat.h defines variable data headers
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and variable storage region headers.
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Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
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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 __AUTHENTICATED_VARIABLE_FORMAT_H__
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#define __AUTHENTICATED_VARIABLE_FORMAT_H__
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#define EFI_AUTHENTICATED_VARIABLE_GUID \
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{ 0xaaf32c78, 0x947b, 0x439a, { 0xa1, 0x80, 0x2e, 0x14, 0x4e, 0xc3, 0x77, 0x92 } }
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extern EFI_GUID gEfiAuthenticatedVariableGuid;
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///
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/// Alignment of variable name and data, according to the architecture:
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/// * For IA-32 and Intel(R) 64 architectures: 1.
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/// * For IA-64 architecture: 8.
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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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// GET_PAD_SIZE calculates the miminal pad bytes needed to make the current pad size satisfy the alignment requirement.
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//
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#if (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 EFI_AUTHENTICATED_VARIABLE_GUID
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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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EFI_GUID Signature;
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///
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/// Size of entire variable store,
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/// including size of variable store header but not including the size of FvHeader.
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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 transition.
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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 specification.
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///
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UINT32 Attributes;
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///
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/// Associated monotonic count value against replay attack.
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///
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UINT64 MonotonicCount;
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///
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/// Associated TimeStamp value against replay attack.
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///
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EFI_TIME TimeStamp;
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///
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/// Index of associated public key in database.
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///
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UINT32 PubKeyIndex;
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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 produces and consumes 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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typedef struct _VARIABLE_INFO_ENTRY VARIABLE_INFO_ENTRY;
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///
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/// This structure contains the variable list that is put in EFI system table.
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/// The variable driver collects all variables that were used at boot service time and produces this list.
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/// This is an optional feature to dump all used variables in shell environment.
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///
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struct _VARIABLE_INFO_ENTRY {
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VARIABLE_INFO_ENTRY *Next; ///< Pointer to next entry.
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EFI_GUID VendorGuid; ///< Guid of Variable.
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CHAR16 *Name; ///< Name of Variable.
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UINT32 Attributes; ///< Attributes of variable defined in UEFI spec.
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UINT32 ReadCount; ///< Number of times to read this variable.
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UINT32 WriteCount; ///< Number of times to write this variable.
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UINT32 DeleteCount; ///< Number of times to delete this variable.
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UINT32 CacheCount; ///< Number of times that cache hits this variable.
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BOOLEAN Volatile; ///< TRUE if volatile, FALSE if non-volatile.
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};
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#endif // __AUTHENTICATED_VARIABLE_FORMAT_H__
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