audk/MdePkg/Include/Ppi/SectionExtraction.h

/** @file
  This file declares Section Extraction PPI.

  Copyright (c) 2006, 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.             

  Module Name:  SectionExtraction.h

  @par Revision Reference:
  This PPI is defined in PEI CIS.
  Version 0.91.

**/

#ifndef __SECTION_EXTRACTION_PPI_H__
#define __SECTION_EXTRACTION_PPI_H__

#define EFI_PEI_SECTION_EXTRACTION_PPI_GUID \
  { \
    0x4F89E208, 0xE144, 0x4804, {0x9E, 0xC8, 0x0F, 0x89, 0x4F, 0x7E, 0x36, 0xD7 } \
  }

typedef struct _EFI_PEI_SECTION_EXTRACTION_PPI EFI_PEI_SECTION_EXTRACTION_PPI;

//
// Bit values for AuthenticationStatus
//
#define EFI_PEI_AUTH_STATUS_PLATFORM_OVERRIDE 0x01
#define EFI_PEI_AUTH_STATUS_IMAGE_SIGNED      0x02
#define EFI_PEI_AUTH_STATUS_NOT_TESTED        0x04
#define EFI_PEI_AUTH_STATUS_TEST_FAILED       0x08

/**
  The function is used to retrieve a section from within a section file.
  It will retrieve both encapsulation sections and leaf sections in their entirety,
  exclusive of the section header.

  @param  PeiServices    Pointer to the PEI Services Table.
  @param  This           Indicates the calling context
  @param  SectionType    Pointer to an EFI_SECTION_TYPE. If SectionType == NULL,
                         the contents of the entire section are returned in Buffer. If SectionType
                         is not NULL, only the requested section is returned.
  @param  SectionDefinitionGuid 
                         Pointer to an EFI_GUID.
                         If SectionType == EFI_SECTION_GUID_DEFINED, SectionDefinitionGuid
                         indicates for which section GUID to search.
                         If SectionType != EFI_SECTION_GUID_DEFINED, SectionDefinitionGuid
                         is unused and is ignored.
  @param  SectionInstance If SectionType is not NULL, indicates which
                         instance of the requested section type to return.
  @param  Buffer         Pointer to a pointer to a buffer in which the section
                         contents are returned.
  @param  BufferSize     A pointer to a caller-allocated UINT32.On input, *BufferSize
                         indicates the size in bytes of the memory region pointed to by Buffer.On output,
                         *BufferSize contains the number of bytes required to read the section.
  @param  AuthenticationStatus 
                         A pointer to a caller-allocated UINT32 in
                         which any metadata from encapsulating GUID-defined sections is returned.

  @retval EFI_SUCCESS           The section was successfully processed and the section
                                contents were returned in Buffer.
  @retval EFI_PROTOCOL_ERROR    A GUID-defined section was encountered in
                                the file with its EFI_GUIDED_SECTION_PROCESSING_REQUIRED bit set, but
                                there was no corresponding GUIDed Section Extraction Protocol in the
                                handle database.*Buffer is unmodified.
  @retval EFI_NOT_FOUND         The requested section does not exist.*Buffer is unmodified.
  @retval EFI_OUT_OF_RESOURCES  The system has insufficient resources to process the request.
  @retval EFI_INVALID_PARAMETER The SectionStreamHandle does not exist.
  @retval EFI_WARN_TOO_SMALL    The size of the input buffer is insufficient to
                                contain the requested section. The input buffer is filled and contents are
                                section contents are truncated.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_PEI_GET_SECTION) (
  IN EFI_PEI_SERVICES                         **PeiServices,
  IN EFI_PEI_SECTION_EXTRACTION_PPI           *This,
  IN EFI_SECTION_TYPE                         *SectionType,
  IN EFI_GUID                                 *SectionDefinitionGuid, OPTIONAL
  IN UINTN                                    SectionInstance,
  IN VOID                                     **Buffer,
  IN OUT UINT32                               *BufferSize,
  OUT UINT32                                  *AuthenticationStatus
  );

/**
  @par Ppi Description:
  This PPI supports encapsulating sections, such as GUIDed sections used to 
  authenticate the file encapsulation of other domain-specific wrapping.

  @param GetSection
  Retrieves a section from within a section file.

**/
struct _EFI_PEI_SECTION_EXTRACTION_PPI {
  EFI_PEI_GET_SECTION PeiGetSection;
};

extern EFI_GUID gEfiPeiSectionExtractionPpiGuid;

#endif