/** @file
This file declares the Firmware Volume Protocol.
The Firmware Volume Protocol provides file-level access to the firmware volume.
Each firmware volume driver must produce an instance of the Firmware Volume
Protocol if the firmware volume is to be visible to the system. The Firmware
Volume Protocol also provides mechanisms for determining and modifying some
attributes of the firmware volume.
Copyright (c) 2007 - 2009, Intel Corporation
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.
@par Revision Reference:
This protocol is defined in Firmware Volume specification.
Version 0.9
**/
#ifndef _FIRMWARE_VOLUME_H_
#define _FIRMWARE_VOLUME_H_
//
// Firmware Volume Protocol GUID definition
//
#define EFI_FIRMWARE_VOLUME_PROTOCOL_GUID \
{ \
0x389F751F, 0x1838, 0x4388, {0x83, 0x90, 0xCD, 0x81, 0x54, 0xBD, 0x27, 0xF8 } \
}
#define FV_DEVICE_SIGNATURE SIGNATURE_32 ('_', 'F', 'V', '_')
typedef struct _EFI_FIRMWARE_VOLUME_PROTOCOL EFI_FIRMWARE_VOLUME_PROTOCOL;
//
// FRAMEWORK_EFI_FV_ATTRIBUTES bit definitions
//
typedef UINT64 FRAMEWORK_EFI_FV_ATTRIBUTES;
//
// ************************************************************
// FRAMEWORK_EFI_FV_ATTRIBUTES bit definitions
// ************************************************************
//
#define EFI_FV_READ_DISABLE_CAP 0x0000000000000001ULL
#define EFI_FV_READ_ENABLE_CAP 0x0000000000000002ULL
#define EFI_FV_READ_STATUS 0x0000000000000004ULL
#define EFI_FV_WRITE_DISABLE_CAP 0x0000000000000008ULL
#define EFI_FV_WRITE_ENABLE_CAP 0x0000000000000010ULL
#define EFI_FV_WRITE_STATUS 0x0000000000000020ULL
#define EFI_FV_LOCK_CAP 0x0000000000000040ULL
#define EFI_FV_LOCK_STATUS 0x0000000000000080ULL
#define EFI_FV_WRITE_POLICY_RELIABLE 0x0000000000000100ULL
#define EFI_FV_ALIGNMENT_CAP 0x0000000000008000ULL
#define EFI_FV_ALIGNMENT_2 0x0000000000010000ULL
#define EFI_FV_ALIGNMENT_4 0x0000000000020000ULL
#define EFI_FV_ALIGNMENT_8 0x0000000000040000ULL
#define EFI_FV_ALIGNMENT_16 0x0000000000080000ULL
#define EFI_FV_ALIGNMENT_32 0x0000000000100000ULL
#define EFI_FV_ALIGNMENT_64 0x0000000000200000ULL
#define EFI_FV_ALIGNMENT_128 0x0000000000400000ULL
#define EFI_FV_ALIGNMENT_256 0x0000000000800000ULL
#define EFI_FV_ALIGNMENT_512 0x0000000001000000ULL
#define EFI_FV_ALIGNMENT_1K 0x0000000002000000ULL
#define EFI_FV_ALIGNMENT_2K 0x0000000004000000ULL
#define EFI_FV_ALIGNMENT_4K 0x0000000008000000ULL
#define EFI_FV_ALIGNMENT_8K 0x0000000010000000ULL
#define EFI_FV_ALIGNMENT_16K 0x0000000020000000ULL
#define EFI_FV_ALIGNMENT_32K 0x0000000040000000ULL
#define EFI_FV_ALIGNMENT_64K 0x0000000080000000ULL
//
// Protocol API definitions
//
/**
Retrieves attributes, insures positive polarity of attribute bits, and returns
resulting attributes in output parameter
@param This Indicates the EFI_FIRMWARE_VOLUME_PROTOCOL instance.
@param Attributes Output buffer containing attributes
@retval EFI_SUCCESS The firmware volume attributes were returned.
**/
typedef
EFI_STATUS
(EFIAPI *FRAMEWORK_EFI_FV_GET_ATTRIBUTES)(
IN EFI_FIRMWARE_VOLUME_PROTOCOL *This,
OUT FRAMEWORK_EFI_FV_ATTRIBUTES *Attributes
);
/**
Sets volume attributes
@param This Indicates the EFI_FIRMWARE_VOLUME_PROTOCOL instance.
@param Attributes On input, Attributes is a pointer to an
EFI_FV_ATTRIBUTES containing the desired firmware
volume settings. On successful return, it contains
the new settings of the firmware volume. On
unsuccessful return, Attributes is not modified
and the firmware volume settings are not changed.
@retval EFI_INVALID_PARAMETER A bit in Attributes was invalid
@retval EFI_SUCCESS The requested firmware volume attributes were set
and the resulting EFI_FV_ATTRIBUTES is returned in
Attributes.
@retval EFI_ACCESS_DENIED The Device is locked and does not permit modification.
**/
typedef
EFI_STATUS
(EFIAPI *FRAMEWORK_EFI_FV_SET_ATTRIBUTES)(
IN EFI_FIRMWARE_VOLUME_PROTOCOL *This,
IN OUT FRAMEWORK_EFI_FV_ATTRIBUTES *Attributes
);
/**
Read the requested file (NameGuid) or file information from the firmware volume
and returns data in Buffer.
@param This The EFI_FIRMWARE_VOLUME_PROTOCOL instance.
@param NameGuid Pointer to EFI_GUID, which is the filename of the file to read
@param Buffer Pointer to pointer to buffer in which contents of file are returned.
If Buffer is NULL, only type, attributes, and size are returned as
there is no output buffer.
If Buffer != NULL and *Buffer == NULL, the output buffer is allocated
from BS pool by ReadFile
If Buffer != NULL and *Buffer != NULL, the output buffer has been
allocated by the caller and is being passed in.
@param BufferSize On input: The buffer size. On output: The size
required to complete the read
@param FoundType Pointer to type of the file whose data is returned
@param FileAttributes Pointer to attributes of the file whose data is returned
@param AuthenticationStatus Pointer to authentication status of the data
@retval EFI_SUCCESS The call completed successfully
@retval EFI_WARN_BUFFER_TOO_SMALL The buffer is too small to contain the requested output.
The buffer is filled and the output is truncated.
@retval EFI_NOT_FOUND NameGuid was not found in the firmware volume.
@retval EFI_DEVICE_ERROR A hardware error occurred when attempting to access the firmware volume.
@retval EFI_ACCESS_DENIED The firmware volume is configured to disallow reads.
@retval EFI_OUT_OF_RESOURCES An allocation failure occurred.
**/
typedef
EFI_STATUS
(EFIAPI *FRAMEWORK_EFI_FV_READ_FILE)(
IN EFI_FIRMWARE_VOLUME_PROTOCOL *This,
IN EFI_GUID *NameGuid,
IN OUT VOID **Buffer,
IN OUT UINTN *BufferSize,
OUT EFI_FV_FILETYPE *FoundType,
OUT EFI_FV_FILE_ATTRIBUTES *FileAttributes,
OUT UINT32 *AuthenticationStatus
);
/**
Read the requested section from the specified file and returns data in Buffer.
@param This Indicates the EFI_FIRMWARE_VOLUME_PROTOCOL instance.
@param NameGuid Filename identifying the file from which to read
@param SectionType The section type to retrieve
@param SectionInstance The instance of SectionType to retrieve
@param Buffer Pointer to pointer to buffer in which contents of file are returned.
If Buffer is NULL, only type, attributes, and size are returned as
there is no output buffer.
If Buffer != NULL and *Buffer == NULL, the output buffer is allocated
from BS pool by ReadFile
If Buffer != NULL and *Buffer != NULL, the output buffer has been
allocated by the caller and is being passed in.
@param BufferSize Pointer to the buffer size passed in, and on output the size
required to complete the read
@param AuthenticationStatus Pointer to the authentication status of the data
@retval EFI_SUCCESS The call completed successfully.
@retval EFI_WARN_BUFFER_TOO_SMALL The buffer is too small to contain the requested output.
The buffer is filled and the output is truncated.
@retval EFI_OUT_OF_RESOURCES An allocation failure occurred.
@retval EFI_NOT_FOUND Name was not found in the firmware volume.
@retval EFI_DEVICE_ERROR A hardware error occurred when attempting to access the firmware volume.
@retval EFI_ACCESS_DENIED The firmware volume is configured to disallow reads.
**/
typedef
EFI_STATUS
(EFIAPI *FRAMEWORK_EFI_FV_READ_SECTION)(
IN EFI_FIRMWARE_VOLUME_PROTOCOL *This,
IN EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN SectionInstance,
IN OUT VOID **Buffer,
IN OUT UINTN *BufferSize,
OUT UINT32 *AuthenticationStatus
);
typedef UINT32 FRAMEWORK_EFI_FV_WRITE_POLICY;
#define FRAMEWORK_EFI_FV_UNRELIABLE_WRITE 0x00000000
#define FRAMEWORK_EFI_FV_RELIABLE_WRITE 0x00000001
typedef struct {
EFI_GUID *NameGuid;
EFI_FV_FILETYPE Type;
EFI_FV_FILE_ATTRIBUTES FileAttributes;
VOID *Buffer;
UINT32 BufferSize;
} FRAMEWORK_EFI_FV_WRITE_FILE_DATA;
/**
Write the supplied file (NameGuid) to the FV.
@param This Indicates the EFI_FIRMWARE_VOLUME_PROTOCOL instance.
@param NumberOfFiles Indicates the number of file records pointed to by FileData
@param WritePolicy Indicates the level of reliability of the write with respect to
things like power failure events.
@param FileData A pointer to an array of EFI_FV_WRITE_FILE_DATA structures. Each
element in the array indicates a file to write, and there are
NumberOfFiles elements in the input array.
@retval EFI_SUCCESS The write completed successfully.
@retval EFI_OUT_OF_RESOURCES The firmware volume does not have enough free space to store file(s).
@retval EFI_DEVICE_ERROR A hardware error occurred when attempting to access the firmware volume.
@retval EFI_WRITE_PROTECTED The firmware volume is configured to disallow writes.
@retval EFI_NOT_FOUND A delete was requested, but the requested file was not
found in the firmware volume.
@retval EFI_INVALID_PARAMETER A delete was requested with a multiple file write.
An unsupported WritePolicy was requested.
An unknown file type was specified.
A file system specific error has occurred.
**/
typedef
EFI_STATUS
(EFIAPI *FRAMEWORK_EFI_FV_WRITE_FILE)(
IN EFI_FIRMWARE_VOLUME_PROTOCOL *This,
IN UINT32 NumberOfFiles,
IN FRAMEWORK_EFI_FV_WRITE_POLICY WritePolicy,
IN FRAMEWORK_EFI_FV_WRITE_FILE_DATA *FileData
);
/**
Given the input key, search for the next matching file in the volume.
@param This Indicates the EFI_FIRMWARE_VOLUME_PROTOCOL instance.
@param Key Pointer to a caller allocated buffer that contains an implementation
specific key that is used to track where to begin searching on
successive calls.
@param FileType Pointer to the file type to filter for
@param NameGuid Pointer to Guid filename of the file found
@param Attributes Pointer to Attributes of the file found
@param Size Pointer to Size in bytes of the file found
@retval EFI_SUCCESS The output parameters are filled with data obtained from
the first matching file that was found.
@retval EFI_NOT_FOUND No files of type FileType were found.
@retval EFI_DEVICE_ERROR A hardware error occurred when attempting to access
the firmware volume.
@retval EFI_ACCESS_DENIED The firmware volume is configured to disallow reads.
**/
typedef
EFI_STATUS
(EFIAPI *FRAMEWORK_EFI_FV_GET_NEXT_FILE)(
IN EFI_FIRMWARE_VOLUME_PROTOCOL *This,
IN OUT VOID *Key,
IN OUT EFI_FV_FILETYPE *FileType,
OUT EFI_GUID *NameGuid,
OUT EFI_FV_FILE_ATTRIBUTES *Attributes,
OUT UINTN *Size
);
//
// Protocol interface structure
//
struct _EFI_FIRMWARE_VOLUME_PROTOCOL {
///
/// Retrieves volume capabilities and current settings.
///
FRAMEWORK_EFI_FV_GET_ATTRIBUTES GetVolumeAttributes;
///
/// Modifies the current settings of the firmware volume.
///
FRAMEWORK_EFI_FV_SET_ATTRIBUTES SetVolumeAttributes;
///
/// Reads an entire file from the firmware volume.
///
FRAMEWORK_EFI_FV_READ_FILE ReadFile;
///
/// Reads a single section from a file into a buffer.
///
FRAMEWORK_EFI_FV_READ_SECTION ReadSection;
///
/// Writes an entire file into the firmware volume.
///
FRAMEWORK_EFI_FV_WRITE_FILE WriteFile;
///
/// Provides service to allow searching the firmware volume.
///
FRAMEWORK_EFI_FV_GET_NEXT_FILE GetNextFile;
///
/// Data field that indicates the size in bytes of the Key input buffer for
/// the GetNextFile() API.
///
UINT32 KeySize;
///
/// Handle of the parent firmware volume.
///
EFI_HANDLE ParentHandle;
};
extern EFI_GUID gEfiFirmwareVolumeProtocolGuid;
#endif