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audk/MdePkg/Include/Protocol/FirmwareVolume2.h

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/** @file
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 during the DXE phase. The Firmware Volume Protocol also provides
mechanisms for determining and modifying some attributes of the firmware volume.
Copyright (c) 2006 - 2008, 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: PI
Version 1.00.
**/
#ifndef __FIRMWARE_VOLUME2_H__
#define __FIRMWARE_VOLUME2_H__
#define EFI_FIRMWARE_VOLUME2_PROTOCOL_GUID \
{ 0x220e73b6, 0x6bdb, 0x4413, { 0x84, 0x5, 0xb9, 0x74, 0xb1, 0x8, 0x61, 0x9a } }
typedef struct _EFI_FIRMWARE_VOLUME2_PROTOCOL EFI_FIRMWARE_VOLUME2_PROTOCOL;
///
/// EFI_FV_ATTRIBUTES
///
typedef UINT64 EFI_FV_ATTRIBUTES;
//
// EFI_FV_ATTRIBUTES bit definitions
//
// EFI_FV_ATTRIBUTES bit semantics
#define EFI_FV2_READ_DISABLE_CAP 0x0000000000000001ULL
#define EFI_FV2_READ_ENABLE_CAP 0x0000000000000002ULL
#define EFI_FV2_READ_STATUS 0x0000000000000004ULL
#define EFI_FV2_WRITE_DISABLE_CAP 0x0000000000000008ULL
#define EFI_FV2_WRITE_ENABLE_CAP 0x0000000000000010ULL
#define EFI_FV2_WRITE_STATUS 0x0000000000000020ULL
#define EFI_FV2_LOCK_CAP 0x0000000000000040ULL
#define EFI_FV2_LOCK_STATUS 0x0000000000000080ULL
#define EFI_FV2_WRITE_POLICY_RELIABLE 0x0000000000000100ULL
#define EFI_FV2_READ_LOCK_CAP 0x0000000000001000ULL
#define EFI_FV2_READ_LOCK_STATUS 0x0000000000002000ULL
#define EFI_FV2_WRITE_LOCK_CAP 0x0000000000004000ULL
#define EFI_FV2_WRITE_LOCK_STATUS 0x0000000000008000ULL
#define EFI_FV2_ALIGNMENT 0x00000000001F0000ULL
#define EFI_FV2_ALIGNMENT_1 0x0000000000000000ULL
#define EFI_FV2_ALIGNMENT_2 0x0000000000010000ULL
#define EFI_FV2_ALIGNMENT_4 0x0000000000020000ULL
#define EFI_FV2_ALIGNMENT_8 0x0000000000030000ULL
#define EFI_FV2_ALIGNMENT_16 0x0000000000040000ULL
#define EFI_FV2_ALIGNMENT_32 0x0000000000050000ULL
#define EFI_FV2_ALIGNMENT_64 0x0000000000060000ULL
#define EFI_FV2_ALIGNMENT_128 0x0000000000070000ULL
#define EFI_FV2_ALIGNMENT_256 0x0000000000080000ULL
#define EFI_FV2_ALIGNMENT_512 0x0000000000090000ULL
#define EFI_FV2_ALIGNMENT_1K 0x00000000000A0000ULL
#define EFI_FV2_ALIGNMENT_2K 0x00000000000B0000ULL
#define EFI_FV2_ALIGNMENT_4K 0x00000000000C0000ULL
#define EFI_FV2_ALIGNMENT_8K 0x00000000000D0000ULL
#define EFI_FV2_ALIGNMENT_16K 0x00000000000E0000ULL
#define EFI_FV2_ALIGNMENT_32K 0x00000000000F0000ULL
#define EFI_FV2_ALIGNMENT_64K 0x0000000000100000ULL
#define EFI_FV2_ALIGNMENT_128K 0x0000000000110000ULL
#define EFI_FV2_ALIGNMENT_256K 0x0000000000120000ULL
#define EFI_FV2_ALIGNMENT_512K 0x0000000000130000ULL
#define EFI_FV2_ALIGNMENT_1M 0x0000000000140000ULL
#define EFI_FV2_ALIGNMENT_2M 0x0000000000150000ULL
#define EFI_FV2_ALIGNMENT_4M 0x0000000000160000ULL
#define EFI_FV2_ALIGNMENT_8M 0x0000000000170000ULL
#define EFI_FV2_ALIGNMENT_16M 0x0000000000180000ULL
#define EFI_FV2_ALIGNMENT_32M 0x0000000000190000ULL
#define EFI_FV2_ALIGNMENT_64M 0x00000000001A0000ULL
#define EFI_FV2_ALIGNMENT_128M 0x00000000001B0000ULL
#define EFI_FV2_ALIGNMENT_256M 0x00000000001C0000ULL
#define EFI_FV2_ALIGNMENT_512M 0x00000000001D0000ULL
#define EFI_FV2_ALIGNMENT_1G 0x00000000001E0000ULL
#define EFI_FV2_ALIGNMENT_2G 0x00000000001F0000ULL
/**
Returns the attributes and current settings of the firmware volume.
Because of constraints imposed by the underlying firmware
storage, an instance of the Firmware Volume Protocol may not
be to able to support all possible variations of this
architecture. These constraints and the current state of the
firmware volume are exposed to the caller using the
GetVolumeAttributes() function. GetVolumeAttributes() is
callable only from TPL_NOTIFY and below. Behavior of
GetVolumeAttributes() at any EFI_TPL above TPL_NOTIFY is
undefined.
@param This Indicates the EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param FvAttributes Pointer to an EFI_FV_ATTRIBUTES in which
the attributes and current settings are
returned.
@retval EFI_SUCCESS The firmware volume attributes were
returned.
**/
typedef
EFI_STATUS
(EFIAPI * EFI_FV_GET_ATTRIBUTES)(
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
OUT EFI_FV_ATTRIBUTES *FvAttributes
);
/**
Modifies the current settings of the firmware volume according to the input parameter.
The SetVolumeAttributes() function is used to set configurable
firmware volume attributes. Only EFI_FV_READ_STATUS,
EFI_FV_WRITE_STATUS, and EFI_FV_LOCK_STATUS may be modified, and
then only in accordance with the declared capabilities. All
other bits of FvAttributes are ignored on input. On successful
return, all bits of *FvAttributes are valid and it contains the
completed EFI_FV_ATTRIBUTES for the volume. To modify an
attribute, the corresponding status bit in the EFI_FV_ATTRIBUTES
is set to the desired value on input. The EFI_FV_LOCK_STATUS bit
does not affect the ability to read or write the firmware
volume. Rather, once the EFI_FV_LOCK_STATUS bit is set, it
prevents further modification to all the attribute bits.
SetVolumeAttributes() is callable only from TPL_NOTIFY and
below. Behavior of SetVolumeAttributes() at any EFI_TPL above
TPL_NOTIFY is undefined.
@param This Indicates the EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param FvAttributes On input, FvAttributes 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, FvAttributes is not
modified and the firmware volume
settings are not changed.
@retval EFI_SUCCESS The requested firmware volume attributes
were set and the resulting
EFI_FV_ATTRIBUTES is returned in
FvAttributes.
@retval EFI_INVALID_PARAMETER FvAttributes:EFI_FV_READ_STATUS
is set to 1 on input, but the
device does not support enabling
reads
(FvAttributes:EFI_FV_READ_ENABLE
is clear on return from
GetVolumeAttributes()). Actual
volume attributes are unchanged.
@retval EFI_INVALID_PARAMETER FvAttributes:EFI_FV_READ_STATUS
is cleared to 0 on input, but
the device does not support
disabling reads
(FvAttributes:EFI_FV_READ_DISABL
is clear on return from
GetVolumeAttributes()). Actual
volume attributes are unchanged.
@retval EFI_INVALID_PARAMETER FvAttributes:EFI_FV_WRITE_STATUS
is set to 1 on input, but the
device does not support enabling
writes
(FvAttributes:EFI_FV_WRITE_ENABL
is clear on return from
GetVolumeAttributes()). Actual
volume attributes are unchanged.
@retval EFI_INVALID_PARAMETER FvAttributes:EFI_FV_WRITE_STATUS
is cleared to 0 on input, but
the device does not support
disabling writes
(FvAttributes:EFI_FV_WRITE_DISAB
is clear on return from
GetVolumeAttributes()). Actual
volume attributes are unchanged.
@retval EFI_INVALID_PARAMETER FvAttributes:EFI_FV_LOCK_STATUS
is set on input, but the device
does not support locking
(FvAttributes:EFI_FV_LOCK_CAP is
clear on return from
GetVolumeAttributes()). Actual
volume attributes are unchanged.
@retval EFI_ACCESS_DENIED Device is locked and does not
allow attribute modification
(FvAttributes:EFI_FV_LOCK_STATUS
is set on return from
GetVolumeAttributes()). Actual
volume attributes are unchanged.
**/
typedef
EFI_STATUS
(EFIAPI * EFI_FV_SET_ATTRIBUTES)(
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
IN OUT EFI_FV_ATTRIBUTES *FvAttributes
);
/**
Retrieves a file and/or file information from the firmware volume.
ReadFile() is used to retrieve any file from a firmware volume
during the DXE phase. The actual binary encoding of the file in
the firmware volume media may be in any arbitrary format as long
as it does the following: It is accessed using the Firmware
Volume Protocol. The image that is returned follows the image
format defined in Code Definitions: PI Firmware File Format.
If the input value of Buffer==NULL, it indicates the caller is
requesting only that the type, attributes, and size of the
file be returned and that there is no output buffer. In this
case, the following occurs:
- BufferSize is returned with the size that is required to
successfully complete the read.
- The output parameters FoundType and *FileAttributes are
returned with valid values.
- The returned value of *AuthenticationStatus is undefined.
If the input value of Buffer!=NULL, the output buffer is
specified by a double indirection of the Buffer parameter. The
input value of *Buffer is used to determine if the output
buffer is caller allocated or is dynamically allocated by
ReadFile(). If the input value of *Buffer!=NULL, it indicates
the output buffer is caller allocated. In this case, the input
value of *BufferSize indicates the size of the
caller-allocated output buffer. If the output buffer is not
large enough to contain the entire requested output, it is
filled up to the point that the output buffer is exhausted and
EFI_WARN_BUFFER_TOO_SMALL is returned, and then BufferSize is
returned with the size required to successfully complete the
read. All other output parameters are returned with valid
values. If the input value of *Buffer==NULL, it indicates the
output buffer is to be allocated by ReadFile(). In this case,
ReadFile() will allocate an appropriately sized buffer from
boot services pool memory, which will be returned in Buffer.
The size of the new buffer is returned in BufferSize and all
other output parameters are returned with valid values.
ReadFile() is callable only from TPL_NOTIFY and below.
Behavior of ReadFile() at any EFI_TPL above TPL_NOTIFY is
undefined.
@param This Indicates the EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param NameGuid Pointer to an EFI_GUID, which is the file
name. All firmware file names are EFI_GUIDs.
A single firmware volume must not have two
valid files with the same file name
EFI_GUID.
@param Buffer Pointer to a pointer to a buffer in which the
file contents are returned, not including the
file header.
@param BufferSize Pointer to a caller-allocated UINTN. It
indicates the size of the memory
represented by Buffer.
@param FoundType Pointer to a caller-allocated EFI_FV_FILETYPE.
@param FileAttributes Pointer to a caller-allocated
EFI_FV_FILE_ATTRIBUTES.
@param AuthenticationStatus Pointer to a caller-allocated
UINT32 in which the
authentication status is
returned.
@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
isallow reads.
**/
typedef
EFI_STATUS
(EFIAPI * EFI_FV_READ_FILE)(
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
IN CONST 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
);
/**
Locates the requested section within a file and returns it in a buffer.
ReadSection() is used to retrieve a specific section from a file
within a firmware volume. The section returned is determined
using a depth-first, left-to-right search algorithm through all
sections found in the specified file. The output buffer is specified by a double indirection
of the Buffer parameter. The input value of Buffer is used to
determine if the output buffer is caller allocated or is
dynamically allocated by ReadSection(). If the input value of
Buffer!=NULL, it indicates that the output buffer is caller
allocated. In this case, the input value of *BufferSize
indicates the size of the caller-allocated output buffer. If
the output buffer is not large enough to contain the entire
requested output, it is filled up to the point that the output
buffer is exhausted and EFI_WARN_BUFFER_TOO_SMALL is returned,
and then BufferSize is returned with the size that is required
to successfully complete the read. All other
output parameters are returned with valid values. If the input
value of *Buffer==NULL, it indicates the output buffer is to
be allocated by ReadSection(). In this case, ReadSection()
will allocate an appropriately sized buffer from boot services
pool memory, which will be returned in *Buffer. The size of
the new buffer is returned in *BufferSize and all other output
parameters are returned with valid values. ReadSection() is
callable only from TPL_NOTIFY and below. Behavior of
ReadSection() at any EFI_TPL above TPL_NOTIFY is
undefined.
@param This Indicates the EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param NameGuid Pointer to an EFI_GUID, which indicates the
file name from which the requested section
will be read.
@param SectionType Indicates the section type to return.
SectionType in conjunction with
SectionInstance indicates which section to
return.
@param SectionInstance Indicates which instance of sections
with a type of SectionType to return.
SectionType in conjunction with
SectionInstance indicates which
section to return. SectionInstance is
zero based.
@param Buffer Pointer to a pointer to a buffer in which the
section contents are returned, not including
the section header.
@param BufferSize Pointer to a caller-allocated UINTN. It
indicates the size of the memory
represented by Buffer.
@param AuthenticationStatus Pointer to a caller-allocated
UINT32 in which the authentication
status is returned.
@retval EFI_SUCCESS The call completed successfully.
@retval EFI_WARN_BUFFER_TOO_SMALL The caller-allocated
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 The requested file was not found in
the firmware volume. EFI_NOT_FOUND The
requested section was not found in the
specified file.
@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. EFI_PROTOCOL_ERROR
The requested section was not found,
but the file could not be fully
parsed because a required
GUIDED_SECTION_EXTRACTION_PROTOCOL
was not found. It is possible the
requested section exists within the
file and could be successfully
extracted once the required
GUIDED_SECTION_EXTRACTION_PROTOCOL
is published.
**/
typedef
EFI_STATUS
(EFIAPI * EFI_FV_READ_SECTION)(
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN SectionInstance,
IN OUT VOID **Buffer,
IN OUT UINTN *BufferSize,
OUT UINT32 *AuthenticationStatus
);
///
/// EFI_FV_WRITE_POLICY, two policies (unreliable write and reliable write) are defined.
///
typedef UINT32 EFI_FV_WRITE_POLICY;
#define EFI_FV_UNRELIABLE_WRITE 0x00000000
#define EFI_FV_RELIABLE_WRITE 0x00000001
//
// EFI_FV_WRITE_FILE_DATA
//
typedef struct {
///
/// Pointer to a GUID, which is the file name to be written.
///
EFI_GUID *NameGuid;
///
/// Indicates the type of file to be written.
///
EFI_FV_FILETYPE Type;
///
/// Indicates the attributes for the file to be written.
///
EFI_FV_FILE_ATTRIBUTES FileAttributes;
///
/// Pointer to a buffer containing the file to be written.
///
VOID *Buffer;
///
/// Indicates the size of the file image contained in Buffer.
///
UINT32 BufferSize;
} EFI_FV_WRITE_FILE_DATA;
/**
Locates the requested section within a file and returns it in a buffer.
WriteFile() is used to write one or more files to a firmware
volume. Each file to be written is described by an
EFI_FV_WRITE_FILE_DATA structure. The caller must ensure that
any required alignment for all files listed in the FileData
array is compatible with the firmware volume. Firmware volume
capabilities can be determined using the GetVolumeAttributes()
call. Similarly, if the WritePolicy is set to
EFI_FV_RELIABLE_WRITE, the caller must check the firmware volume
capabilities to ensure EFI_FV_RELIABLE_WRITE is supported by the
firmware volume. EFI_FV_UNRELIABLE_WRITE must always be
supported. Writing a file with a size of zero
(FileData[n].BufferSize == 0) deletes the file from the firmware
volume if it exists. Deleting a file must be done one at a time.
Deleting a file as part of a multiple file write is not allowed.
Platform Initialization Specification VOLUME 3 Shared
Architectural Elements 84 August 21, 2006 Version 1.0
WriteFile() is callable only from TPL_NOTIFY and below.
Behavior of WriteFile() at any EFI_TPL above TPL_NOTIFY is
undefined.
@param This Indicates the EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param NumberOfFiles Indicates the number of elements in the array pointed to by FileData
@param WritePolicy Indicates the level of reliability for the
write in the event of a power failure or
other system failure during the write
operation.
@param FileData Pointer to an array of
EFI_FV_WRITE_FILE_DATA. Each element of
FileData[] represents a file to be written.
@retval EFI_SUCCESS The write completed successfully.
@retval EFI_OUT_OF_RESOURCES The firmware volume does not
have enough free space to
storefile(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.
@retval EFI_INVALID_PARAMETER An unsupported WritePolicy was
requested.
@retval EFI_INVALID_PARAMETER An unknown file type was
specified.
@retval EFI_INVALID_PARAMETER A file system specific error
has occurred.
**/
typedef
EFI_STATUS
(EFIAPI * EFI_FV_WRITE_FILE)(
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
IN UINT32 NumberOfFiles,
IN EFI_FV_WRITE_POLICY WritePolicy,
IN EFI_FV_WRITE_FILE_DATA *FileData
);
/**
Retrieves information about the next file in the firmware volume store
that matches the search criteria.
GetNextFile() is the interface that is used to search a firmware
volume for a particular file. It is called successively until
the desired file is located or the function returns
EFI_NOT_FOUND. To filter uninteresting files from the output,
the type of file to search for may be specified in FileType. For
example, if *FileType is EFI_FV_FILETYPE_DRIVER, only files of
this type will be returned in the output. If *FileType is
EFI_FV_FILETYPE_ALL, no filtering of file types is done. The Key
parameter is used to indicate a starting point of the search. If
the buffer *Key is completely initialized to zero, the search
re-initialized and starts at the beginning. Subsequent calls to
GetNextFile() must maintain the value of *Key returned by the
immediately previous call. The actual contents of *Key are
implementation specific and no semantic content is implied.
GetNextFile() is callable only from TPL_NOTIFY and below.
Behavior of GetNextFile() at any EFI_TPL above TPL_NOTIFY is
undefined.
@param This Indicates the EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param Key Pointer to a caller-allocated buffer that contains implementation-specific data that is
used to track where to begin the search for the next file. The size of the buffer must be
at least This->KeySize bytes long. To re-initialize the search and begin from the
beginning of the firmware volume, the entire buffer must be cleared to zero. Other
than clearing the buffer to initiate a new search, the caller must not modify the data in
the buffer between calls to GetNextFile().
@param FileType Pointer to a caller-allocated
EFI_FV_FILETYPE. The GetNextFile() API can
filter its search for files based on the
value of the FileType input. A *FileType
input of EFI_FV_FILETYPE_ALL causes
GetNextFile() to search for files of all
types. If a file is found, the file's type
is returned in FileType. *FileType is not
modified if no file is found.
@param NameGuid Pointer to a caller-allocated EFI_GUID. If a
matching file is found, the file's name is
returned in NameGuid. If no matching file is
found, *NameGuid is not modified.
@param Attributes Pointer to a caller-allocated
EFI_FV_FILE_ATTRIBUTES. If a matching file
is found, the file's attributes are returned
in Attributes. If no matching file is found,
Attributes is not modified. Type
EFI_FV_FILE_ATTRIBUTES is defined in
ReadFile().
@param Size Pointer to a caller-allocated UINTN. If a
matching file is found, the file's size is
returned in *Size. If no matching file is found,
Size is not modified.
@retval EFI_SUCCESS The output parameters are filled with data
obtained from the first matching file that
was found.
@retval FI_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 * EFI_FV_GET_NEXT_FILE)(
IN CONST EFI_FIRMWARE_VOLUME2_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
);
/**
Return information about a firmware volume.
The GetInfo() function returns information of type
InformationType for the requested firmware volume. If the volume
does not support the requested information type, then
EFI_UNSUPPORTED is returned. If the buffer is not large enough
to hold the requested structure, EFI_BUFFER_TOO_SMALL is
returned and the BufferSize is set to the size of buffer that is
required to make the request. The information types defined by
this specification are required information types that all file
systems must support.
@param This A pointer to the EFI_FIRMWARE_VOLUME2_PROTOCOL
instance that is the file handle the requested
information is for.
@param InformationType The type identifier for the
information being requested.
@param BufferSize On input, the size of Buffer. On output,
the amount of data returned in Buffer. In
both cases, the size is measured in bytes.
@param Buffer A pointer to the data buffer to return. The
buffer's type is indicated by InformationType.
@retval EFI_SUCCESS The information was retrieved.
@retval EFI_UNSUPPORTED The InformationType is not known.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are
corrupted.
@retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to
read the current directory
entry. BufferSize has been
updated with the size needed to
complete the request.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FV_GET_INFO)(
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
IN CONST EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
);
/**
Sets information about a firmware volume.
The SetInfo() function sets information of type InformationType
on the requested firmware volume.
@param This A pointer to the EFI_FIRMWARE_VOLUME2_PROTOCOL
instance that is the file handle the information
is for.
@param InformationType The type identifier for the
information being set.
@param BufferSize The size, in bytes, of Buffer.
@param Buffer A pointer to the data buffer to write. The
buffer's type is indicated by InformationType.
@retval EFI_SUCCESS The information was set.
@retval EFI_UNSUPPORTED The InformationType is not known.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are
corrupted.
@retval EFI_WRITE_PROTECTED The media is read only.
@retval EFI_VOLUME_FULL The volume is full.
@retval EFI_BAD_BUFFER_SIZE BufferSize is smaller than the
size of the type indicated by
InformationType.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FV_SET_INFO)(
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
IN CONST EFI_GUID *InformationType,
IN UINTN BufferSize,
IN CONST VOID *Buffer
);
///
/// The Firmware Volume Protocol contains the file-level
/// abstraction to the firmware volume as well as some firmware
/// volume attribute reporting and configuration services. The
/// Firmware Volume Protocol is the interface used by all parts of
/// DXE that are not directly involved with managing the firmware
/// volume itself. This abstraction allows many varied types of
/// firmware volume implementations. A firmware volume may be a
/// flash device or it may be a file in the UEFI system partition,
/// for example. This level of firmware volume implementation
/// detail is not visible to the consumers of the Firmware Volume
/// Protocol.
///
struct _EFI_FIRMWARE_VOLUME2_PROTOCOL {
EFI_FV_GET_ATTRIBUTES GetVolumeAttributes;
EFI_FV_SET_ATTRIBUTES SetVolumeAttributes;
EFI_FV_READ_FILE ReadFile;
EFI_FV_READ_SECTION ReadSection;
EFI_FV_WRITE_FILE WriteFile;
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;
EFI_FV_GET_INFO GetInfo;
EFI_FV_SET_INFO SetInfo;
};
extern EFI_GUID gEfiFirmwareVolume2ProtocolGuid;
#endif
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