OvmfPkg/PlatformPei/Fv.c

   1 /** @file
   2   Build FV related hobs for platform.
   3
   4   Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include "PiPei.h"
  10 #include "Platform.h"
  11 #include <Library/DebugLib.h>
  12 #include <Library/HobLib.h>
  13 #include <Library/PeiServicesLib.h>
  14 #include <Library/PcdLib.h>
  15
  16
  17 /**
  18   Publish PEI & DXE (Decompressed) Memory based FVs to let PEI
  19   and DXE know about them.
  20
  21   @retval EFI_SUCCESS   Platform PEI FVs were initialized successfully.
  22
  23 **/
  24 EFI_STATUS
  25 PeiFvInitialization (
  26   VOID
  27   )
  28 {
  29   BOOLEAN SecureS3Needed;
  30
  31   DEBUG ((EFI_D_INFO, "Platform PEI Firmware Volume Initialization\n"));
  32
  33   //
  34   // Create a memory allocation HOB for the PEI FV.
  35   //
  36   // Allocate as ACPI NVS is S3 is supported
  37   //
  38   BuildMemoryAllocationHob (
  39     PcdGet32 (PcdOvmfPeiMemFvBase),
  40     PcdGet32 (PcdOvmfPeiMemFvSize),
  41     mS3Supported ? EfiACPIMemoryNVS : EfiBootServicesData
  42     );
  43
  44   //
  45   // Let DXE know about the DXE FV
  46   //
  47   BuildFvHob (PcdGet32 (PcdOvmfDxeMemFvBase), PcdGet32 (PcdOvmfDxeMemFvSize));
  48
  49   SecureS3Needed = mS3Supported && FeaturePcdGet (PcdSmmSmramRequire);
  50
  51   //
  52   // Create a memory allocation HOB for the DXE FV.
  53   //
  54   // If "secure" S3 is needed, then SEC will decompress both PEI and DXE
  55   // firmware volumes at S3 resume too, hence we need to keep away the OS from
  56   // DXEFV as well. Otherwise we only need to keep away DXE itself from the
  57   // DXEFV area.
  58   //
  59   BuildMemoryAllocationHob (
  60     PcdGet32 (PcdOvmfDxeMemFvBase),
  61     PcdGet32 (PcdOvmfDxeMemFvSize),
  62     SecureS3Needed ? EfiACPIMemoryNVS : EfiBootServicesData
  63     );
  64
  65   //
  66   // Additionally, said decompression will use temporary memory above the end
  67   // of DXEFV, so let's keep away the OS from there too.
  68   //
  69   if (SecureS3Needed) {
  70     UINT32 DxeMemFvEnd;
  71
  72     DxeMemFvEnd = PcdGet32 (PcdOvmfDxeMemFvBase) +
  73                   PcdGet32 (PcdOvmfDxeMemFvSize);
  74     BuildMemoryAllocationHob (
  75       DxeMemFvEnd,
  76       PcdGet32 (PcdOvmfDecompressionScratchEnd) - DxeMemFvEnd,
  77       EfiACPIMemoryNVS
  78       );
  79   }
  80
  81   //
  82   // Let PEI know about the DXE FV so it can find the DXE Core
  83   //
  84   PeiServicesInstallFvInfoPpi (
  85     NULL,
  86     (VOID *)(UINTN) PcdGet32 (PcdOvmfDxeMemFvBase),
  87     PcdGet32 (PcdOvmfDxeMemFvSize),
  88     NULL,
  89     NULL
  90     );
  91
  92   return EFI_SUCCESS;
  93 }
  94