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   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "PiPei.h"
  16 #include "Platform.h"
  17 #include <Library/DebugLib.h>
  18 #include <Library/HobLib.h>
  19 #include <Library/PeiServicesLib.h>
  20 #include <Library/PcdLib.h>
  21
  22
  23 /**
  24   Publish PEI & DXE (Decompressed) Memory based FVs to let PEI
  25   and DXE know about them.
  26
  27   @retval EFI_SUCCESS   Platform PEI FVs were initialized successfully.
  28
  29 **/
  30 EFI_STATUS
  31 PeiFvInitialization (
  32   VOID
  33   )
  34 {
  35   BOOLEAN SecureS3Needed;
  36
  37   DEBUG ((EFI_D_INFO, "Platform PEI Firmware Volume Initialization\n"));
  38
  39   //
  40   // Create a memory allocation HOB for the PEI FV.
  41   //
  42   // Allocate as ACPI NVS is S3 is supported
  43   //
  44   BuildMemoryAllocationHob (
  45     PcdGet32 (PcdOvmfPeiMemFvBase),
  46     PcdGet32 (PcdOvmfPeiMemFvSize),
  47     mS3Supported ? EfiACPIMemoryNVS : EfiBootServicesData
  48     );
  49
  50   //
  51   // Let DXE know about the DXE FV
  52   //
  53   BuildFvHob (PcdGet32 (PcdOvmfDxeMemFvBase), PcdGet32 (PcdOvmfDxeMemFvSize));
  54
  55   SecureS3Needed = mS3Supported && FeaturePcdGet (PcdSmmSmramRequire);
  56
  57   //
  58   // Create a memory allocation HOB for the DXE FV.
  59   //
  60   // If "secure" S3 is needed, then SEC will decompress both PEI and DXE
  61   // firmware volumes at S3 resume too, hence we need to keep away the OS from
  62   // DXEFV as well. Otherwise we only need to keep away DXE itself from the
  63   // DXEFV area.
  64   //
  65   BuildMemoryAllocationHob (
  66     PcdGet32 (PcdOvmfDxeMemFvBase),
  67     PcdGet32 (PcdOvmfDxeMemFvSize),
  68     SecureS3Needed ? EfiACPIMemoryNVS : EfiBootServicesData
  69     );
  70
  71   //
  72   // Additionally, said decompression will use temporary memory above the end
  73   // of DXEFV, so let's keep away the OS from there too.
  74   //
  75   if (SecureS3Needed) {
  76     UINT32 DxeMemFvEnd;
  77
  78     DxeMemFvEnd = PcdGet32 (PcdOvmfDxeMemFvBase) +
  79                   PcdGet32 (PcdOvmfDxeMemFvSize);
  80     BuildMemoryAllocationHob (
  81       DxeMemFvEnd,
  82       PcdGet32 (PcdOvmfDecompressionScratchEnd) - DxeMemFvEnd,
  83       EfiACPIMemoryNVS
  84       );
  85   }
  86
  87   //
  88   // Let PEI know about the DXE FV so it can find the DXE Core
  89   //
  90   PeiServicesInstallFvInfoPpi (
  91     NULL,
  92     (VOID *)(UINTN) PcdGet32 (PcdOvmfDxeMemFvBase),
  93     PcdGet32 (PcdOvmfDxeMemFvSize),
  94     NULL,
  95     NULL
  96     );
  97
  98   return EFI_SUCCESS;
  99 }
 100