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264 lines
10 KiB
C
264 lines
10 KiB
C
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/** @file
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Section Extraction PEIM
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Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiPei.h>
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#include <Ppi/GuidedSectionExtraction.h>
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#include <Library/DebugLib.h>
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#include <Library/ExtractGuidedSectionLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/PeiServicesLib.h>
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/**
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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
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EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI instance.
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Buffer containing the input GUIDed section to be
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processed. OutputBuffer OutputBuffer is
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allocated from PEI permanent memory and contains
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the new section stream.
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@param InputSection A pointer to the input buffer, which contains
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the input section to be processed.
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@param OutputBuffer A pointer to a caller-allocated buffer, whose
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size is specified by the contents of OutputSize.
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@param OutputSize A pointer to a caller-allocated
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UINTN in which the size of *OutputBuffer
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allocation is stored. If the function
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returns anything other than EFI_SUCCESS,
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the value of OutputSize is undefined.
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@param AuthenticationStatus A pointer to a caller-allocated
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UINT32 that indicates the
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authentication status of the
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output buffer. If the input
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section's GuidedSectionHeader.
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Attributes field has the
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EFI_GUIDED_SECTION_AUTH_STATUS_VALID
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bit as clear,
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AuthenticationStatus must return
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zero. These bits reflect the
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status of the extraction
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operation. If the function
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returns anything other than
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EFI_SUCCESS, the value of
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AuthenticationStatus is
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undefined.
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@retval EFI_SUCCESS The InputSection was
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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
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resources to process the request.
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@retval EFI_INVALID_PARAMETER The GUID in InputSection does
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not match this instance of the
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GUIDed Section Extraction PPI.
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**/
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EFI_STATUS
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EFIAPI
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CustomGuidedSectionExtract (
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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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// Module global for the Section Extraction PPI instance
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//
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CONST EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI mCustomGuidedSectionExtractionPpi = {
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CustomGuidedSectionExtract
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};
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/**
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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
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EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI instance.
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Buffer containing the input GUIDed section to be
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processed. OutputBuffer OutputBuffer is
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allocated from PEI permanent memory and contains
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the new section stream.
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@param InputSection A pointer to the input buffer, which contains
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the input section to be processed.
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@param OutputBuffer A pointer to a caller-allocated buffer, whose
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size is specified by the contents of OutputSize.
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@param OutputSize A pointer to a caller-allocated
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UINTN in which the size of *OutputBuffer
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allocation is stored. If the function
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returns anything other than EFI_SUCCESS,
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the value of OutputSize is undefined.
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@param AuthenticationStatus A pointer to a caller-allocated
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UINT32 that indicates the
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authentication status of the
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output buffer. If the input
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section's GuidedSectionHeader.
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Attributes field has the
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EFI_GUIDED_SECTION_AUTH_STATUS_VALID
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bit as clear,
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AuthenticationStatus must return
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zero. These bits reflect the
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status of the extraction
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operation. If the function
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returns anything other than
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EFI_SUCCESS, the value of
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AuthenticationStatus is
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undefined.
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@retval EFI_SUCCESS The InputSection was
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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
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resources to process the request.
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@retval EFI_INVALID_PARAMETER The GUID in InputSection does
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not match this instance of the
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GUIDed Section Extraction PPI.
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**/
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EFI_STATUS
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EFIAPI
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CustomGuidedSectionExtract (
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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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EFI_STATUS Status;
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UINT8 *ScratchBuffer;
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UINT32 ScratchBufferSize;
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UINT32 OutputBufferSize;
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UINT16 SectionAttribute;
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//
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// Init local variable
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//
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ScratchBuffer = NULL;
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//
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// Call GetInfo to get the size and attribute of input guided section data.
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//
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Status = ExtractGuidedSectionGetInfo (
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InputSection,
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&OutputBufferSize,
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&ScratchBufferSize,
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&SectionAttribute
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((DEBUG_ERROR, "GetInfo from guided section Failed - %r\n", Status));
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return Status;
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}
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if (ScratchBufferSize != 0) {
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//
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// Allocate scratch buffer
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//
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ScratchBuffer = AllocatePages (EFI_SIZE_TO_PAGES (ScratchBufferSize));
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if (ScratchBuffer == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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}
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if (((SectionAttribute & EFI_GUIDED_SECTION_PROCESSING_REQUIRED) != 0) && OutputBufferSize > 0) {
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//
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// Allocate output buffer
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//
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*OutputBuffer = AllocatePages (EFI_SIZE_TO_PAGES (OutputBufferSize));
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if (*OutputBuffer == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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DEBUG ((DEBUG_INFO, "Customized Guided section Memory Size required is 0x%x and address is 0x%p\n", OutputBufferSize, *OutputBuffer));
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}
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Status = ExtractGuidedSectionDecode (
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InputSection,
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OutputBuffer,
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ScratchBuffer,
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AuthenticationStatus
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);
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if (EFI_ERROR (Status)) {
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//
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// Decode failed
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//
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DEBUG ((DEBUG_ERROR, "Extract guided section Failed - %r\n", Status));
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return Status;
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}
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*OutputSize = (UINTN) OutputBufferSize;
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return EFI_SUCCESS;
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}
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/**
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Main entry for Section Extraction PEIM driver.
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This routine registers the Section Extraction PPIs that have been registered
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with the Section Extraction Library.
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@param FileHandle Handle of the file being invoked.
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@param PeiServices Describes the list of possible PEI Services.
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval other Some error occurs when executing this entry point.
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**/
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EFI_STATUS
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EFIAPI
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SectionExtractionPeiEntry (
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IN EFI_PEI_FILE_HANDLE FileHandle,
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IN CONST EFI_PEI_SERVICES **PeiServices
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)
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{
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EFI_STATUS Status;
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EFI_GUID *ExtractHandlerGuidTable;
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UINTN ExtractHandlerNumber;
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EFI_PEI_PPI_DESCRIPTOR *GuidPpi;
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//
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// Get custom extract guided section method guid list
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//
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ExtractHandlerNumber = ExtractGuidedSectionGetGuidList (&ExtractHandlerGuidTable);
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//
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// Install custom extraction guid PPI
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//
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if (ExtractHandlerNumber > 0) {
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GuidPpi = (EFI_PEI_PPI_DESCRIPTOR *) AllocatePool (ExtractHandlerNumber * sizeof (EFI_PEI_PPI_DESCRIPTOR));
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ASSERT (GuidPpi != NULL);
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while (ExtractHandlerNumber-- > 0) {
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GuidPpi->Flags = EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
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GuidPpi->Ppi = (VOID *) &mCustomGuidedSectionExtractionPpi;
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GuidPpi->Guid = &ExtractHandlerGuidTable[ExtractHandlerNumber];
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Status = PeiServicesInstallPpi (GuidPpi++);
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ASSERT_EFI_ERROR (Status);
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}
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}
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return EFI_SUCCESS;
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}
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