mirror of https://github.com/acidanthera/audk.git
247 lines
7.5 KiB
C
247 lines
7.5 KiB
C
/** @file
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The variable data structures are related to EDK II-specific implementation of UEFI variables.
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VariableFormat.h defines variable data headers and variable storage region headers.
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Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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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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#define EFI_VARIABLE_GUID \
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{ 0xddcf3616, 0x3275, 0x4164, { 0x98, 0xb6, 0xfe, 0x85, 0x70, 0x7f, 0xfe, 0x7d } }
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extern EFI_GUID gEfiVariableGuid;
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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_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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/// 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 specification.
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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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//
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// This structure is used for SMM variable. the collected statistics data is saved in SMRAM. It can be got from
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// SMI handler. The communication buffer should be:
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// EFI_SMM_COMMUNICATE_HEADER + SMM_VARIABLE_COMMUNICATE_HEADER + payload.
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//
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typedef struct {
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UINTN Function;
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EFI_STATUS ReturnStatus;
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UINT8 Data[1];
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} SMM_VARIABLE_COMMUNICATE_HEADER;
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//
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// The payload for this function is SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE.
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//
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#define SMM_VARIABLE_FUNCTION_GET_VARIABLE 1
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//
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// The payload for this function is SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME.
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//
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#define SMM_VARIABLE_FUNCTION_GET_NEXT_VARIABLE_NAME 2
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//
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// The payload for this function is SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE.
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//
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#define SMM_VARIABLE_FUNCTION_SET_VARIABLE 3
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//
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// The payload for this function is SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO.
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//
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#define SMM_VARIABLE_FUNCTION_QUERY_VARIABLE_INFO 4
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//
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// It is a notify event, no extra payload for this function.
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//
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#define SMM_VARIABLE_FUNCTION_READY_TO_BOOT 5
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//
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// It is a notify event, no extra payload for this function.
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//
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#define SMM_VARIABLE_FUNCTION_EXIT_BOOT_SERVICE 6
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//
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// The payload for this function is VARIABLE_INFO_ENTRY. The GUID in EFI_SMM_COMMUNICATE_HEADER
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// is gEfiSmmVariableProtocolGuid.
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//
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#define SMM_VARIABLE_FUNCTION_GET_STATISTICS 7
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///
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/// Size of SMM communicate header, without including the payload.
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///
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#define SMM_COMMUNICATE_HEADER_SIZE (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data))
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///
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/// Size of SMM variable communicate header, without including the payload.
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///
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#define SMM_VARIABLE_COMMUNICATE_HEADER_SIZE (OFFSET_OF (SMM_VARIABLE_COMMUNICATE_HEADER, Data))
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///
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/// This structure is used to communicate with SMI handler by SetVariable and GetVariable.
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///
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typedef struct {
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EFI_GUID Guid;
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UINTN DataSize;
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UINTN NameSize;
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UINT32 Attributes;
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CHAR16 Name[1];
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} SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE;
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///
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/// This structure is used to communicate with SMI handler by GetNextVariableName.
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///
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typedef struct {
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EFI_GUID Guid;
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UINTN NameSize;
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CHAR16 Name[1];
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} SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME;
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///
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/// This structure is used to communicate with SMI handler by QueryVariableInfo.
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///
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typedef struct {
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UINT64 MaximumVariableStorageSize;
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UINT64 RemainingVariableStorageSize;
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UINT64 MaximumVariableSize;
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UINT32 Attributes;
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} SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO;
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///
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/// This structure is used to communicate with SMI handler to get variable statistics information.
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///
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typedef VARIABLE_INFO_ENTRY SMM_VARIABLE_COMMUNICATE_VARIABLE_INFO_ENTRY;
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#endif // _EFI_VARIABLE_H_
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