MdePkg/Include/Ppi/GuidedSectionExtraction.h

   1 /** @file
   2   If a GUID-defined section is encountered when doing section extraction,
   3   the PEI Foundation or the EFI_PEI_FILE_LOADER_PPI instance
   4   calls the appropriate instance of the GUIDed Section Extraction PPI
   5   to extract the section stream contained therein.
   6
   7   Copyright (c) 2006 - 2008, Intel Corporation
   8   All rights reserved. This program and the accompanying materials
   9   are licensed and made available under the terms and conditions of the BSD License
  10   which accompanies this distribution.  The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.php
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15
  16   @par Revision Reference:
  17   This PPI is defined in PI Version 1.00.
  18
  19 **/
  20
  21 #ifndef __EFI_GUIDED_SECTION_EXTRACTION_PPI_H__
  22 #define __EFI_GUIDED_SECTION_EXTRACTION_PPI_H__
  23
  24 //
  25 // Typically, protocol interface structures are identified
  26 // by associating them with a GUID. Each instance of
  27 // a protocol with a given GUID must have
  28 // the same interface structure. While all instances of
  29 // the GUIDed Section Extraction PPI must have
  30 // the same interface structure, they do not all have
  31 // te same GUID. The GUID that is associated with
  32 // an instance of the GUIDed Section Extraction Protocol
  33 // is used to correlate it with the GUIDed section type
  34 // that it is intended to process.
  35 //
  36
  37
  38 typedef struct _EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI   EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI;
  39
  40
  41 /**
  42   Processes the input section and returns the data contained therein
  43   along with the authentication status.
  44
  45   The ExtractSection() function processes the input section and
  46   returns a pointer to the section contents. If the section being
  47   extracted does not require processing (if the section
  48   GuidedSectionHeader.Attributes has the
  49   EFI_GUIDED_SECTION_PROCESSING_REQUIRED field cleared), then
  50   OutputBuffer is just updated to point to the start of the
  51   section's contents. Otherwise, *Buffer must be allocated
  52   from PEI permanent memory.
  53
  54   @param This                   Indicates the
  55                                 EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI instance.
  56                                 Buffer containing the input GUIDed section to be
  57                                 processed. OutputBuffer OutputBuffer is
  58                                 allocated from PEI permanent memory and contains
  59                                 the new section stream.
  60
  61   @param OutputSize             A pointer to a caller-allocated
  62                                 UINTN in which the size of *OutputBuffer
  63                                 allocation is stored. If the function
  64                                 returns anything other than EFI_SUCCESS,
  65                                 the value of OutputSize is undefined.
  66
  67   @param AuthenticationStatus   A pointer to a caller-allocated
  68                                 UINT32 that indicates the
  69                                 authentication status of the
  70                                 output buffer. If the input
  71                                 section's GuidedSectionHeader.
  72                                 Attributes field has the
  73                                 EFI_GUIDED_SECTION_AUTH_STATUS_VALID
  74                                 bit as clear,
  75                                 AuthenticationStatus must return
  76                                 zero. These bits reflect the
  77                                 status of the extraction
  78                                 operation. If the function
  79                                 returns anything other than
  80                                 EFI_SUCCESS, the value of
  81                                 AuthenticationStatus is
  82                                 undefined.
  83
  84   @retval EFI_SUCCESS           The InputSection was
  85                                 successfully processed and the
  86                                 section contents were returned.
  87
  88   @retval EFI_OUT_OF_RESOURCES  The system has insufficient
  89                                 resources to process the request.
  90
  91   @retval EFI_INVALID_PARAMETER The GUID in InputSection does
  92                                 not match this instance of the
  93                                 GUIDed Section Extraction PPI.
  94 **/
  95 typedef
  96 EFI_STATUS
  97 (EFIAPI *EFI_PEI_EXTRACT_GUIDED_SECTION)(
  98   IN CONST  EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI *This,
  99   IN CONST  VOID                                  *InputSection,
 100   OUT       VOID                                  **OutputBuffer,
 101   OUT       UINTN                                 *OutputSize,
 102   OUT       UINT32                                *AuthenticationStatus
 103 );
 104
 105
 106
 107 /**
 108   If a GUID-defined section is encountered when doing section extraction,
 109   the PEI Foundation or the EFI_PEI_FILE_LOADER_PPI instance
 110   calls the appropriate instance of the GUIDed Section
 111   Extraction PPI to extract the section stream contained
 112   therein.
 113
 114
 115   @param ExtractSection   Takes the GUIDed section as input and
 116                           produces the section stream data. See
 117                           the ExtractSection() function
 118                           description.
 119
 120 **/
 121 struct _EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI {
 122   EFI_PEI_EXTRACT_GUIDED_SECTION ExtractSection;
 123 };
 124
 125
 126
 127 #endif
 128