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99 lines
4.3 KiB
C
99 lines
4.3 KiB
C
/** @file
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If a GUID-defined section is encountered when doing section extraction,
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the PEI Foundation or the EFI_PEI_FILE_LOADER_PPI instance
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calls the appropriate instance of the GUIDed Section Extraction PPI
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to extract the section stream contained therein.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference:
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This PPI is introduced in PI Version 1.0.
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**/
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#ifndef __EFI_GUIDED_SECTION_EXTRACTION_PPI_H__
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#define __EFI_GUIDED_SECTION_EXTRACTION_PPI_H__
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//
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// Typically, protocol interface structures are identified
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// by associating them with a GUID. Each instance of
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// a protocol with a given GUID must have
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// the same interface structure. While all instances of
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// the GUIDed Section Extraction PPI must have
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// the same interface structure, they do not all have
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// te same GUID. The GUID that is associated with
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// an instance of the GUIDed Section Extraction Protocol
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// is used to correlate it with the GUIDed section type
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// that it is intended to process.
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//
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typedef struct _EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI;
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/**
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Processes the input section and returns the data contained therein
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along with the authentication status.
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The ExtractSection() function processes the input section and
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returns a pointer to the section contents. If the section being
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extracted does not require processing (if the section
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GuidedSectionHeader.Attributes has the
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EFI_GUIDED_SECTION_PROCESSING_REQUIRED field cleared), then
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OutputBuffer is just updated to point to the start of the
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section's contents. Otherwise, *Buffer must be allocated
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from PEI permanent memory.
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@param This Indicates the EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI
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instance.
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@param InputSection Buffer containing the input GUIDed section to be
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processed.
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@param OutputBuffer *OutputBuffer is allocated from PEI permanent memory
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and contains the new section stream.
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@param OutputSize A pointer to a caller-allocated UINTN in which
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the size of *OutputBuffer allocation is stored.
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If the function returns anything other than
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EFI_SUCCESS, the value of *OutputSize is undefined.
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@param AuthenticationStatus A pointer to a caller-allocated UINT32 that indicates
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the authentication status of the output buffer.
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If the input section's
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GuidedSectionHeader.Attributes field has the
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EFI_GUIDED_SECTION_AUTH_STATUS_VALID bit as clear,
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*AuthenticationStatus must return zero. These bits
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reflect the status of the extraction operation.
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If the function returns anything other than EFI_SUCCESS,
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the value of *AuthenticationStatus is undefined.
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@retval EFI_SUCCESS The InputSection was successfully processed and the
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section contents were returned.
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@retval EFI_OUT_OF_RESOURCES The system has insufficient resources to process the request.
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@retval EFI_INVALID_PARAMETER The GUID in InputSection does not match this instance of the
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GUIDed Section Extraction PPI.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_EXTRACT_GUIDED_SECTION)(
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IN CONST EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI *This,
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IN CONST VOID *InputSection,
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OUT VOID **OutputBuffer,
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OUT UINTN *OutputSize,
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OUT UINT32 *AuthenticationStatus
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);
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///
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/// If a GUID-defined section is encountered when doing section extraction,
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/// the PEI Foundation or the EFI_PEI_FILE_LOADER_PPI instance
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/// calls the appropriate instance of the GUIDed Section
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/// Extraction PPI to extract the section stream contained
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/// therein.
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///
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struct _EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI {
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EFI_PEI_EXTRACT_GUIDED_SECTION ExtractSection;
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};
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#endif
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