/** @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 - 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
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 } \
}
//
// FRAMEWORK_EFI_FV_ATTRIBUTES bit definitions
//
//
// ************************************************************
// FRAMEWORK_EFI_FV_ATTRIBUTES bit definitions
// ************************************************************
//
//
// Protocol API definitions
//
/**
Retrieves attributes, insures positive polarity of attribute bits, and returns
resulting attributes in an 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
);
/**
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
);
/**
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 The pointer to EFI_GUID, which is the filename of
the file to read.
@param Buffer The pointer to pointer to buffer in which contents of file are returned.
<br>
If Buffer is NULL, only type, attributes, and size
are returned as there is no output buffer.
<br>
If Buffer != NULL and *Buffer == NULL, the output
buffer is allocated from BS pool by ReadFile.
<br>
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 The pointer to the type of the file whose data
is returned.
@param FileAttributes The pointer to attributes of the file whose data
is returned.
@param AuthenticationStatus The 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 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
);
/**
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
a file are returned.
<br>
If Buffer is NULL, only type, attributes, and size
are returned as there is no output buffer.
<br>
If Buffer != NULL and *Buffer == NULL, the output
buffer is allocated from BS pool by ReadFile.
<br>
If Buffer != NULL and *Buffer != NULL, the output
buffer has been allocated by the caller and is being
passed in.
@param BufferSize The pointer to the buffer size passed in, and on
output the size required to complete the read.
@param AuthenticationStatus The 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 The 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
);
typedef struct {
/**
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
);
/**
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 The pointer to the file type to filter for.
@param NameGuid The pointer to Guid filename of the file found.
@param Attributes The pointer to Attributes of the file found.
@param Size The 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
);
//
// Protocol interface structure
//
struct _EFI_FIRMWARE_VOLUME_PROTOCOL {
///
/// Retrieves volume capabilities and current settings.
///
///
/// Modifies the current settings of the firmware volume.
///
///
/// Reads an entire file from the firmware volume.
///
///
/// Reads a single section from a file into a buffer.
///
///
/// Writes an entire file into the firmware volume.
///
///
/// Provides service to allow searching the firmware volume.
///
///
/// Data field that indicates the size in bytes of the Key input buffer for
/// the GetNextFile() API.
///
///
/// Handle of the parent firmware volume.
///
};
#endif