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/** @file
The variable data structures are related to EDK II specific UEFI variable implementation.
Variable data header and Variable storage region header are defined here.
Copyright (c) 2006 - 2008 Intel Corporation. <BR>
All rights reserved. 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.
**/
#ifndef __VARIABLE_FORMAT_H__
#define __VARIABLE_FORMAT_H__
#define EFI_VARIABLE_GUID \
{ 0xddcf3616, 0x3275, 0x4164, { 0x98, 0xb6, 0xfe, 0x85, 0x70, 0x7f, 0xfe, 0x7d } }
extern EFI_GUID gEfiVariableGuid;
///
/// Alignment of variable name and data.
/// For IA32/X64 architecture, the alignment is set to 1, and 8 is for IPF archtecture.
///
#if defined (MDE_CPU_IPF)
#define ALIGNMENT 8
#else
#define ALIGNMENT 1
#endif
//
// GET_PAD_SIZE to calculate miminal pad bytes to make current size satisfy the alignment requirement
//
#if ((ALIGNMENT == 0) || (ALIGNMENT == 1))
#define GET_PAD_SIZE(a) (0)
#else
#define GET_PAD_SIZE(a) (((~a) + 1) & (ALIGNMENT - 1))
#endif
///
/// Alignment of Variable Data Header in Variable Store region
///
#define HEADER_ALIGNMENT 4
#define HEADER_ALIGN(Header) (((UINTN) (Header) + HEADER_ALIGNMENT - 1) & (~(HEADER_ALIGNMENT - 1)))
///
/// Status of Variable Store Region
///
typedef enum {
EfiRaw,
EfiValid,
EfiInvalid,
EfiUnknown
} VARIABLE_STORE_STATUS;
#pragma pack(1)
#define VARIABLE_STORE_SIGNATURE EFI_VARIABLE_GUID
///
/// Variable Store Header Format and State
///
#define VARIABLE_STORE_FORMATTED 0x5a
#define VARIABLE_STORE_HEALTHY 0xfe
///
/// Variable Store region header
///
typedef struct {
///
/// Variable store region signature.
///
EFI_GUID Signature;
///
/// Size of entire variable store,
/// including size of variable store header but not including the size of FvHeader.
///
UINT32 Size;
///
/// variable region format state
///
UINT8 Format;
///
/// variable region healthy state
///
UINT8 State;
UINT16 Reserved;
UINT32 Reserved1;
} VARIABLE_STORE_HEADER;
///
/// Variable data start flag
///
#define VARIABLE_DATA 0x55AA
///
/// Variable State flags
///
#define VAR_IN_DELETED_TRANSITION 0xfe ///< Variable is in obsolete transistion
#define VAR_DELETED 0xfd ///< Variable is obsolete
#define VAR_HEADER_VALID_ONLY 0x7f ///< Variable header has been valid
#define VAR_ADDED 0x3f ///< Variable has been completely added
///
/// Single Variable Data Header Structure
///
typedef struct {
///
/// Variable Data Start Flag
///
UINT16 StartId;
///
/// Variable State defined above
///
UINT8 State;
UINT8 Reserved;
///
/// Attributes of variable defined in UEFI spec
///
UINT32 Attributes;
///
/// Size of variable Null-terminated Unicode string name
///
UINT32 NameSize;
///
/// Size of the variable data without this header
///
UINT32 DataSize;
///
/// A unique identifier for the vendor that produce and consume this varaible.
///
EFI_GUID VendorGuid;
} VARIABLE_HEADER;
#pragma pack()
typedef struct _VARIABLE_INFO_ENTRY VARIABLE_INFO_ENTRY;
///
/// This structure contains the variable list that is put in EFI system table.
/// The variable driver collects all used variables at boot service time and produce this list.
/// This is an optional feature to dump all used variables in shell environment.
///
struct _VARIABLE_INFO_ENTRY {
VARIABLE_INFO_ENTRY *Next; ///> Pointer to next entry
EFI_GUID VendorGuid; ///> Guid of Variable
CHAR16 *Name; ///> Name of Variable
UINT32 Attributes; ///> Attributes of variable defined in UEFI spec
UINT32 ReadCount; ///> Times to read this variable
UINT32 WriteCount; ///> Times to write this variable
UINT32 DeleteCount; ///> Times to delete this variable
UINT32 CacheCount; ///> Times that cache hits this variable
BOOLEAN Volatile; ///> TRUE if volatile FALSE if non-volatile
};
#endif // _EFI_VARIABLE_H_
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