mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-29 12:35:53 +01:00
112 lines
5.0 KiB
C
112 lines
5.0 KiB
C
/** @file
|
|
This file declares Read-only Variable Service2 PPI.
|
|
This ppi permits read-only access to the UEFI variable store during the PEI phase.
|
|
|
|
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
@par Revision Reference:
|
|
This PPI is introduced in PI Version 1.0.
|
|
|
|
**/
|
|
|
|
#ifndef __PEI_READ_ONLY_VARIABLE2_PPI_H__
|
|
#define __PEI_READ_ONLY_VARIABLE2_PPI_H__
|
|
|
|
#define EFI_PEI_READ_ONLY_VARIABLE2_PPI_GUID \
|
|
{ 0x2ab86ef5, 0xecb5, 0x4134, { 0xb5, 0x56, 0x38, 0x54, 0xca, 0x1f, 0xe1, 0xb4 } }
|
|
|
|
|
|
typedef struct _EFI_PEI_READ_ONLY_VARIABLE2_PPI EFI_PEI_READ_ONLY_VARIABLE2_PPI;
|
|
|
|
/**
|
|
This service retrieves a variable's value using its name and GUID.
|
|
|
|
Read the specified variable from the UEFI variable store. If the Data
|
|
buffer is too small to hold the contents of the variable,
|
|
the error EFI_BUFFER_TOO_SMALL is returned and DataSize is set to the
|
|
required buffer size to obtain the data.
|
|
|
|
@param This A pointer to this instance of the EFI_PEI_READ_ONLY_VARIABLE2_PPI.
|
|
@param VariableName A pointer to a null-terminated string that is the variable's name.
|
|
@param VariableGuid A pointer to an EFI_GUID that is the variable's GUID. The combination of
|
|
VariableGuid and VariableName must be unique.
|
|
@param Attributes If non-NULL, on return, points to the variable's attributes.
|
|
@param DataSize On entry, points to the size in bytes of the Data buffer.
|
|
On return, points to the size of the data returned in Data.
|
|
@param Data Points to the buffer which will hold the returned variable value.
|
|
May be NULL with a zero DataSize in order to determine the size of the buffer needed.
|
|
|
|
@retval EFI_SUCCESS The variable was read successfully.
|
|
@retval EFI_NOT_FOUND The variable was not found.
|
|
@retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the resulting data.
|
|
DataSize is updated with the size required for
|
|
the specified variable.
|
|
@retval EFI_INVALID_PARAMETER VariableName, VariableGuid, DataSize or Data is NULL.
|
|
@retval EFI_DEVICE_ERROR The variable could not be retrieved because of a device error.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_PEI_GET_VARIABLE2)(
|
|
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
|
|
IN CONST CHAR16 *VariableName,
|
|
CONST_EFI_GUID_PTR_T VariableGuid,
|
|
OUT UINT32 *Attributes,
|
|
IN OUT UINTN *DataSize,
|
|
OUT VOID *Data OPTIONAL
|
|
);
|
|
|
|
|
|
/**
|
|
Return the next variable name and GUID.
|
|
|
|
This function is called multiple times to retrieve the VariableName
|
|
and VariableGuid of all variables currently available in the system.
|
|
On each call, the previous results are passed into the interface,
|
|
and, on return, the interface returns the data for the next
|
|
interface. When the entire variable list has been returned,
|
|
EFI_NOT_FOUND is returned.
|
|
|
|
@param This A pointer to this instance of the EFI_PEI_READ_ONLY_VARIABLE2_PPI.
|
|
|
|
@param VariableNameSize On entry, points to the size of the buffer pointed to by VariableName.
|
|
On return, the size of the variable name buffer.
|
|
@param VariableName On entry, a pointer to a null-terminated string that is the variable's name.
|
|
On return, points to the next variable's null-terminated name string.
|
|
|
|
@param VariableGuid On entry, a pointer to an EFI_GUID that is the variable's GUID.
|
|
On return, a pointer to the next variable's GUID.
|
|
|
|
@retval EFI_SUCCESS The variable was read successfully.
|
|
@retval EFI_NOT_FOUND The variable could not be found.
|
|
@retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the resulting
|
|
data. VariableNameSize is updated with the size
|
|
required for the specified variable.
|
|
@retval EFI_INVALID_PARAMETER VariableName, VariableGuid or
|
|
VariableNameSize is NULL.
|
|
@retval EFI_DEVICE_ERROR The variable could not be retrieved because of a device error.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_PEI_GET_NEXT_VARIABLE_NAME2)(
|
|
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
|
|
IN OUT UINTN *VariableNameSize,
|
|
IN OUT CHAR16 *VariableName,
|
|
IN OUT EFI_GUID *VariableGuid
|
|
);
|
|
|
|
///
|
|
/// This PPI provides a lightweight, read-only variant of the full EFI
|
|
/// variable services.
|
|
///
|
|
struct _EFI_PEI_READ_ONLY_VARIABLE2_PPI {
|
|
EFI_PEI_GET_VARIABLE2 GetVariable;
|
|
EFI_PEI_GET_NEXT_VARIABLE_NAME2 NextVariableName;
|
|
};
|
|
|
|
extern EFI_GUID gEfiPeiReadOnlyVariable2PpiGuid;
|
|
|
|
#endif
|