mirror of https://github.com/acidanthera/audk.git
147 lines
4.6 KiB
C
147 lines
4.6 KiB
C
/** @file
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*
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* Copyright (c) 2014, ARM Limited. All rights reserved.
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*
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* This program and the accompanying materials
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* are licensed and made available under the terms and conditions of the BSD License
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* which accompanies this distribution. The full text of the license may be found at
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* http://opensource.org/licenses/bsd-license.php
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*
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* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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*
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**/
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#include <Uefi.h>
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#include <Library/AcpiLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Protocol/AcpiTable.h>
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#include <Protocol/FirmwareVolume2.h>
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#include <IndustryStandard/Acpi.h>
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/**
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Locate and Install the ACPI tables from the Firmware Volume
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@param AcpiFile Guid of the ACPI file into the Firmware Volume
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@return EFI_SUCCESS The function completed successfully.
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@return EFI_NOT_FOUND The protocol could not be located.
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@return EFI_OUT_OF_RESOURCES There are not enough resources to find the protocol.
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**/
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EFI_STATUS
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LocateAndInstallAcpiFromFv (
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IN CONST EFI_GUID* AcpiFile
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)
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{
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EFI_STATUS Status;
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EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol;
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EFI_HANDLE *HandleBuffer;
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UINTN NumberOfHandles;
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UINT32 FvStatus;
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UINTN Index;
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EFI_FIRMWARE_VOLUME2_PROTOCOL *FvInstance;
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INTN SectionInstance;
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UINTN SectionSize;
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EFI_ACPI_COMMON_HEADER *AcpiTable;
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UINTN AcpiTableSize;
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UINTN AcpiTableKey;
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// Ensure the ACPI Table is present
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Status = gBS->LocateProtocol (
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&gEfiAcpiTableProtocolGuid,
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NULL,
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(VOID**)&AcpiProtocol
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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FvStatus = 0;
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SectionInstance = 0;
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// Locate all the Firmware Volume protocols.
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Status = gBS->LocateHandleBuffer (
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ByProtocol,
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&gEfiFirmwareVolume2ProtocolGuid,
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NULL,
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&NumberOfHandles,
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&HandleBuffer
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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// Looking for FV with ACPI storage file
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for (Index = 0; Index < NumberOfHandles; Index++) {
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//
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// Get the protocol on this handle
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// This should not fail because of LocateHandleBuffer
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//
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Status = gBS->HandleProtocol (
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HandleBuffer[Index],
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&gEfiFirmwareVolume2ProtocolGuid,
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(VOID**) &FvInstance
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);
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if (EFI_ERROR (Status)) {
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goto FREE_HANDLE_BUFFER;
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}
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while (Status == EFI_SUCCESS) {
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// AcpiTable must be allocated by ReadSection (ie: AcpiTable == NULL)
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AcpiTable = NULL;
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// See if it has the ACPI storage file
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Status = FvInstance->ReadSection (
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FvInstance,
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AcpiFile,
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EFI_SECTION_RAW,
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SectionInstance,
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(VOID**) &AcpiTable,
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&SectionSize,
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&FvStatus
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);
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if (!EFI_ERROR (Status)) {
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AcpiTableKey = 0;
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AcpiTableSize = ((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTable)->Length;
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ASSERT (SectionSize >= AcpiTableSize);
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DEBUG ((EFI_D_ERROR, "- Found '%c%c%c%c' ACPI Table\n",
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(((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTable)->Signature & 0xFF),
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((((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTable)->Signature >> 8) & 0xFF),
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((((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTable)->Signature >> 16) & 0xFF),
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((((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTable)->Signature >> 24) & 0xFF)));
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// Install the ACPI Table
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Status = AcpiProtocol->InstallAcpiTable (
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AcpiProtocol,
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AcpiTable,
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AcpiTableSize,
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&AcpiTableKey
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);
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// Free memory allocated by ReadSection
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gBS->FreePool (AcpiTable);
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if (EFI_ERROR (Status)) {
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break;
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}
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// Increment the section instance
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SectionInstance++;
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}
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}
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}
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FREE_HANDLE_BUFFER:
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//
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// Free any allocated buffers
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//
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gBS->FreePool (HandleBuffer);
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return EFI_SUCCESS;
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}
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