audk/MdePkg/Include/Ppi/FirmwareVolume.h

/** @file
  This file provides functions for accessing a memory-mapped firmware volume of a specific format.

  Copyright (c) 2006 - 2007, 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 PPI is defined in PI.
  Version 1.00

**/

#ifndef __FIRMWARE_VOLUME_PPI_H__
#define __FIRMWARE_VOLUME_PPI_H__

//
// The GUID for this PPI is the same as the firmware volume format GUID.
// can be EFI_FIRMWARE_FILE_SYSTEM2_GUID or the GUID for a user-defined format. The
// EFI_FIRMWARE_FILE_SYSTEM2_GUID is the PI Firmware Volume format.
// 

typedef struct _EFI_PEI_FIRMWARE_VOLUME_PPI   EFI_PEI_FIRMWARE_VOLUME_PPI;


/**
  Create a volume handle from the information in the buffer. For
  memory-mapped firmware volumes, Buffer and BufferSize refer to
  the start of the firmware volume and the firmware volume size.
  For non memory-mapped firmware volumes, this points to a
  buffer which contains the necessary information for creating
  the firmware volume handle. Normally, these values are derived
  from the EFI_FIRMWARE_VOLUME_INFO_PPI.
  
  
  @param This         Points to this instance of the
                      EFI_PEI_FIRMWARE_VOLUME_PPI
  @param Buffer       Points to the start of the buffer.
  @param BufferSize   Size of the buffer.
  @param FvHandle     Points to the returned firmware volume
                      handle. The firmware volume handle must
                      be unique within the system. 


  @retval EFI_SUCCESS           Firmware volume handle.
  @retval EFI_VOLUME_CORRUPTED  Volume was corrupt.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_PEI_FV_PROCESS_FV) (
  IN CONST  EFI_PEI_FIRMWARE_VOLUME_PPI *This,
  IN CONST  VOID                        *Buffer,
  IN CONST  UINTN                       BufferSize,
  OUT       EFI_PEI_FV_HANDLE           *FvHandle
);


/**
  Create a volume handle from the information in the buffer. For
  memory-mapped firmware volumes, Buffer and BufferSize refer to
  the start of the firmware volume and the firmware volume size.
  For non memory-mapped firmware volumes, this points to a
  buffer which contains the necessary information for creating
  the firmware volume handle. Normally, these values are derived
  from the EFI_FIRMWARE_VOLUME_INFO_PPI.
  
  
  @param This         Points to this instance of the
                      EFI_PEI_FIRMWARE_VOLUME_PPI
  @param Buffer       Points to the start of the buffer.
  @param BufferSize   Size of the buffer.
  @param FvHandle     Points to the returned firmware volume
                      handle. The firmware volume handle must
                      be unique within the system. 


  @retval EFI_SUCCESS           Firmware volume handle.
  @retval EFI_VOLUME_CORRUPTED  Volume was corrupt.

**/

/**
  This service enables PEI modules to discover additional firmware files. The FileHandle must be
  unique within the system.

  @param This       Points to this instance of the
                    EFI_PEI_FIRMWARE_VOLUME_PPI. SearchType A filter
                    to find only files of this type. Type
                    EFI_FV_FILETYPE_ALL causes no filtering to be
                    done.
  @param FvHandle   Handle of firmware volume in which to
                    search.

  @param FileHandle Points to the current handle from which to
                    begin searching or NULL to start at the
                    beginning of the firmware volume. Updated
                    upon return to reflect the file found.


  @retval EFI_SUCCESS   The file was found.
  @retval EFI_NOT_FOUND The file was not found. FileHandle
                        contains NULL.
**/ 
typedef EFI_STATUS
(EFIAPI *EFI_PEI_FV_FIND_FILE_TYPE) ( 
  IN CONST  EFI_PEI_FIRMWARE_VOLUME_PPI   *This, 
  IN CONST  EFI_FV_FILETYPE               SearchType, 
  IN CONST  EFI_PEI_FV_HANDLE             FvHandle,
  IN OUT EFI_PEI_FILE_HANDLE              *FileHandle 
);


/**
   
  This service searches for files with a specific name, within
  either the specified firmware volume or all firmware volumes.

  @param This   Points to this instance of the
                EFI_PEI_FIRMWARE_VOLUME_PPI.

  @param FileName   A pointer to the name of the file to find
                    within the firmware volume.

  @param FvHandle   Upon entry, the pointer to the firmware
                    volume to search or NULL if all firmware
                    volumes should be searched. Upon exit, the
                    actual firmware volume in which the file was
                    found.

  @param FileHandle   Upon exit, points to the found file's
                      handle or NULL if it could not be found.

  @retval EFI_SUCCESS   File was found.

  @param EFI_NOT_FOUND  File was not found.

  @param EFI_INVALID_PARAMETER  FvHandle or FileHandle or
                                FileName was NULL.


**/
typedef
EFI_STATUS
(EFIAPI *EFI_PEI_FV_FIND_FILE_NAME) (
  IN CONST  EFI_PEI_FIRMWARE_VOLUME_PPI *This,
  IN CONST  EFI_GUID                    *FileName,
  IN CONST  EFI_PEI_FV_HANDLE           FvHandle,
  OUT       EFI_PEI_FILE_HANDLE         *FileHandle
);


/**
  This function returns information about a specific
  file, including its file name, type, attributes, starting
  address and size. 
   
  @param This       Points to this instance of the
                    EFI_PEI_FIRMWARE_VOLUME_PPI.

  @param FileHandle Handle of the file.

  @param FileInfo   Upon exit, points to the file????s
                    information.

  @retval EFI_SUCCESS             File information returned.
  
  @retval EFI_INVALID_PARAMETER   If FileHandle does not
                                  represent a valid file.
                                  EFI_INVALID_PARAMETER If
                                  FileInfo is NULL
  
**/ 

typedef
EFI_STATUS (EFIAPI *EFI_PEI_FV_GET_FILE_INFO) (
  IN  CONST EFI_PEI_FIRMWARE_VOLUME_PPI   *This, 
  IN  CONST EFI_PEI_FILE_HANDLE           FileHandle, 
  OUT       EFI_FV_FILE_INFO              *FileInfo
);

/**
  This function returns information about the firmware
  volume.
  
  @param This       Points to this instance of the
                    EFI_PEI_FIRMWARE_VOLUME_PPI.
  
  @param FvHandle   Handle to the firmware handle.
  
  @param VolumeInfo Points to the returned firmware volume
                    information.
  
  
  @retval EFI_SUCCESS             Information returned
                                  successfully.
  
  @retval EFI_INVALID_PARAMETER   FvHandle does not indicate a
                                  valid firmware volume or VolumeInfo is NULL
**/ 
typedef
EFI_STATUS (EFIAPI *EFI_PEI_FV_GET_INFO)(
  IN CONST  EFI_PEI_FIRMWARE_VOLUME_PPI   *This, 
  IN CONST  EFI_PEI_FV_HANDLE             FvHandle, 
  OUT       EFI_FV_INFO                   *VolumeInfo
);

/**
  This service enables PEI modules to discover sections of a given type within a valid file.
  
  @param This   Points to this instance of the
                EFI_PEI_FIRMWARE_VOLUME_PPI.
  
  @param SearchType   A filter to find only sections of this
                      type.
  
  @param FileHandle   Handle of firmware file in which to
                      search.
  
  @param SectionData  Updated upon  return to point to the
                      section found.
  
  @retval EFI_SUCCESS     Section was found.
  
  @retval EFI_NOT_FOUND   Section of the specified type was not
                          found. SectionData contains NULL.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_PEI_FV_FIND_SECTION) (
  IN CONST  EFI_PEI_FIRMWARE_VOLUME_PPI   *This,
  IN CONST  EFI_SECTION_TYPE              SearchType,
  IN CONST  EFI_PEI_FILE_HANDLE           FileHandle,
  OUT       VOID                          **SectionData
);



/*
  This PPI provides functions for accessing a memory-mapped firmware volume of a specific format.

  @param  ProcessVolume       Process a firmware volume and create a volume handle.
  @param  FindFileByType      Find all files of a specific type.
  @param  FindFileByName      Find the file with a specific name.
  @param  GetFileInfo         Return the information about a specific file
  @param  GetVolumeInfo       Return the firmware volume attributes.
  @param  FindSectionByType   Find all sections of a specific type.

**/
struct _EFI_PEI_FIRMWARE_VOLUME_PPI {
  EFI_PEI_FV_PROCESS_FV       ProcessVolume;
  EFI_PEI_FV_FIND_FILE_TYPE   FindFileByType;
  EFI_PEI_FV_FIND_FILE_NAME   FindFileByName;
  EFI_PEI_FV_GET_FILE_INFO    GetFileInfo;
  EFI_PEI_FV_GET_INFO         GetVolumeInfo;
  EFI_PEI_FV_FIND_SECTION     FindSectionByType;
} ;

extern EFI_GUID gEfiPeiFirmwareVolumePpiGuid;

#endif