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25c804da79
Currently there are only few use cases for the lite variable. FSP2.4 requires bootloader to have variable support. To avoid creating a new variable instance, just update lite variable to align with FSP 2.4 variable requirements. Signed-off-by: Guo Dong <guo.dong@intel.com>
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/** @file
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The variable data structures.
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Copyright (c) 2017 - 2023, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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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 VARIABLE_STORE_SIZE FixedPcdGet32(PcdVariableStoreSize)
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#define VARIABLE_STORE_SIGNATURE SIGNATURE_32('V', 'A', 'R', 'S')
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#define VARIABLE_NAME_MAX_LEN 64
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///
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/// Variable data start flag.
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///
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#define VARIABLE_DATA 0xA5
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///
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/// Variable State flags.
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///
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#define VAR_HEADER_VALID 0x01
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#define VAR_DATA_VALID 0x02
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#define VAR_IN_MIGRATION 0x04
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#define VAR_DELETED 0x08
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///
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/// Variable Attribute combinations.
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///
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#define VAR_ATTR_READ_ONLY 0x10
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///
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/// Variable state macros
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///
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#define IS_HEADER_VALID(State) (((State) & VAR_HEADER_VALID) == 0)
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#define IS_DATA_VALID(State) (((State) & VAR_DATA_VALID) == 0)
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#define IS_IN_MIGRATION(State) (((State) & VAR_IN_MIGRATION) == 0)
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#define IS_DELETED(State) (((State) & VAR_DELETED) == 0)
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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 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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UINT8 Reserved[6];
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} VARIABLE_STORE_HEADER;
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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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UINT8 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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///
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/// Size of the variable data.
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///
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UINT16 DataSize;
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///
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/// Variable GUID
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///
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EFI_GUID VariableGuid;
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} VARIABLE_HEADER;
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#endif
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