[mirror_edk2.git] / UefiCpuPkg / Feature / Capsule / MicrocodeUpdateDxe / MicrocodeFmp.c

/** @file\r
  Produce FMP instance for Microcode.\r
\r
  Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r
  This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include "MicrocodeUpdate.h"\r
\r
//\r
// MicrocodeFmp driver private data\r
//\r
MICROCODE_FMP_PRIVATE_DATA *mMicrocodeFmpPrivate = NULL;\r
\r
EFI_FIRMWARE_MANAGEMENT_PROTOCOL mFirmwareManagementProtocol = {\r
  FmpGetImageInfo,\r
  FmpGetImage,\r
  FmpSetImage,\r
  FmpCheckImage,\r
  FmpGetPackageInfo,\r
  FmpSetPackageInfo\r
};\r
\r
/**\r
  Initialize Microcode Descriptor.\r
\r
  @param[in] MicrocodeFmpPrivate private data structure to be initialized.\r
\r
  @return EFI_SUCCESS Microcode Descriptor is initialized.\r
**/\r
EFI_STATUS\r
InitializeMicrocodeDescriptor (\r
  IN MICROCODE_FMP_PRIVATE_DATA  *MicrocodeFmpPrivate\r
  );\r
\r
/**\r
  Returns information about the current firmware image(s) of the device.\r
\r
  This function allows a copy of the current firmware image to be created and saved.\r
  The saved copy could later been used, for example, in firmware image recovery or rollback.\r
\r
  @param[in]      This               A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.\r
  @param[in, out] ImageInfoSize      A pointer to the size, in bytes, of the ImageInfo buffer.\r
                                     On input, this is the size of the buffer allocated by the caller.\r
                                     On output, it is the size of the buffer returned by the firmware\r
                                     if the buffer was large enough, or the size of the buffer needed\r
                                     to contain the image(s) information if the buffer was too small.\r
  @param[in, out] ImageInfo          A pointer to the buffer in which firmware places the current image(s)\r
                                     information. The information is an array of EFI_FIRMWARE_IMAGE_DESCRIPTORs.\r
  @param[out]     DescriptorVersion  A pointer to the location in which firmware returns the version number\r
                                     associated with the EFI_FIRMWARE_IMAGE_DESCRIPTOR.\r
  @param[out]     DescriptorCount    A pointer to the location in which firmware returns the number of\r
                                     descriptors or firmware images within this device.\r
  @param[out]     DescriptorSize     A pointer to the location in which firmware returns the size, in bytes,\r
                                     of an individual EFI_FIRMWARE_IMAGE_DESCRIPTOR.\r
  @param[out]     PackageVersion     A version number that represents all the firmware images in the device.\r
                                     The format is vendor specific and new version must have a greater value\r
                                     than the old version. If PackageVersion is not supported, the value is\r
                                     0xFFFFFFFF. A value of 0xFFFFFFFE indicates that package version comparison\r
                                     is to be performed using PackageVersionName. A value of 0xFFFFFFFD indicates\r
                                     that package version update is in progress.\r
  @param[out]     PackageVersionName A pointer to a pointer to a null-terminated string representing the\r
                                     package version name. The buffer is allocated by this function with\r
                                     AllocatePool(), and it is the caller's responsibility to free it with a call\r
                                     to FreePool().\r
\r
  @retval EFI_SUCCESS                The device was successfully updated with the new image.\r
  @retval EFI_BUFFER_TOO_SMALL       The ImageInfo buffer was too small. The current buffer size\r
                                     needed to hold the image(s) information is returned in ImageInfoSize.\r
  @retval EFI_INVALID_PARAMETER      ImageInfoSize is NULL.\r
  @retval EFI_DEVICE_ERROR           Valid information could not be returned. Possible corrupted image.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
FmpGetImageInfo (\r
  IN        EFI_FIRMWARE_MANAGEMENT_PROTOCOL  *This,\r
  IN OUT    UINTN                             *ImageInfoSize,\r
  IN OUT    EFI_FIRMWARE_IMAGE_DESCRIPTOR     *ImageInfo,\r
  OUT       UINT32                            *DescriptorVersion,\r
  OUT       UINT8                             *DescriptorCount,\r
  OUT       UINTN                             *DescriptorSize,\r
  OUT       UINT32                            *PackageVersion,\r
  OUT       CHAR16                            **PackageVersionName\r
  )\r
{\r
  MICROCODE_FMP_PRIVATE_DATA *MicrocodeFmpPrivate;\r
  UINTN                      Index;\r
\r
  MicrocodeFmpPrivate = MICROCODE_FMP_PRIVATE_DATA_FROM_FMP(This);\r
\r
  if(ImageInfoSize == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  if (*ImageInfoSize < sizeof(EFI_FIRMWARE_IMAGE_DESCRIPTOR) * MicrocodeFmpPrivate->DescriptorCount) {\r
    *ImageInfoSize = sizeof(EFI_FIRMWARE_IMAGE_DESCRIPTOR) * MicrocodeFmpPrivate->DescriptorCount;\r
    return EFI_BUFFER_TOO_SMALL;\r
  }\r
\r
  if (ImageInfo == NULL ||\r
      DescriptorVersion == NULL ||\r
      DescriptorCount == NULL ||\r
      DescriptorSize == NULL ||\r
      PackageVersion == NULL ||\r
      PackageVersionName == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  *ImageInfoSize      = sizeof(EFI_FIRMWARE_IMAGE_DESCRIPTOR) * MicrocodeFmpPrivate->DescriptorCount;\r
  *DescriptorSize     = sizeof(EFI_FIRMWARE_IMAGE_DESCRIPTOR);\r
  *DescriptorCount    = MicrocodeFmpPrivate->DescriptorCount;\r
  *DescriptorVersion  = EFI_FIRMWARE_IMAGE_DESCRIPTOR_VERSION;\r
\r
  //\r
  // supports 1 ImageInfo descriptor\r
  //\r
  CopyMem(&ImageInfo[0], MicrocodeFmpPrivate->ImageDescriptor, sizeof(EFI_FIRMWARE_IMAGE_DESCRIPTOR) * MicrocodeFmpPrivate->DescriptorCount);\r
  for (Index = 0; Index < MicrocodeFmpPrivate->DescriptorCount; Index++) {\r
    if ((ImageInfo[Index].AttributesSetting & IMAGE_ATTRIBUTE_IN_USE) != 0) {\r
      ImageInfo[Index].LastAttemptVersion = MicrocodeFmpPrivate->LastAttempt.LastAttemptVersion;\r
      ImageInfo[Index].LastAttemptStatus = MicrocodeFmpPrivate->LastAttempt.LastAttemptStatus;\r
    }\r
  }\r
\r
  //\r
  // package version\r
  //\r
  *PackageVersion = MicrocodeFmpPrivate->PackageVersion;\r
  if (MicrocodeFmpPrivate->PackageVersionName != NULL) {\r
    *PackageVersionName = AllocateCopyPool(StrSize(MicrocodeFmpPrivate->PackageVersionName), MicrocodeFmpPrivate->PackageVersionName);\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Retrieves a copy of the current firmware image of the device.\r
\r
  This function allows a copy of the current firmware image to be created and saved.\r
  The saved copy could later been used, for example, in firmware image recovery or rollback.\r
\r
  @param[in]     This            A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.\r
  @param[in]     ImageIndex      A unique number identifying the firmware image(s) within the device.\r
                                 The number is between 1 and DescriptorCount.\r
  @param[in,out] Image           Points to the buffer where the current image is copied to.\r
  @param[in,out] ImageSize       On entry, points to the size of the buffer pointed to by Image, in bytes.\r
                                 On return, points to the length of the image, in bytes.\r
\r
  @retval EFI_SUCCESS            The device was successfully updated with the new image.\r
  @retval EFI_BUFFER_TOO_SMALL   The buffer specified by ImageSize is too small to hold the\r
                                 image. The current buffer size needed to hold the image is returned\r
                                 in ImageSize.\r
  @retval EFI_INVALID_PARAMETER  The Image was NULL.\r
  @retval EFI_NOT_FOUND          The current image is not copied to the buffer.\r
  @retval EFI_UNSUPPORTED        The operation is not supported.\r
  @retval EFI_SECURITY_VIOLATIO  The operation could not be performed due to an authentication failure.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
FmpGetImage (\r
  IN  EFI_FIRMWARE_MANAGEMENT_PROTOCOL  *This,\r
  IN  UINT8                             ImageIndex,\r
  IN  OUT  VOID                         *Image,\r
  IN  OUT  UINTN                        *ImageSize\r
  )\r
{\r
  MICROCODE_FMP_PRIVATE_DATA *MicrocodeFmpPrivate;\r
  EFI_STATUS                 Status;\r
\r
  if (Image == NULL || ImageSize == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  MicrocodeFmpPrivate = MICROCODE_FMP_PRIVATE_DATA_FROM_FMP(This);\r
\r
  if (ImageIndex == 0 || ImageIndex > MicrocodeFmpPrivate->DescriptorCount || ImageSize == NULL || Image == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Status = MicrocodeRead(ImageIndex, (VOID *)Image, ImageSize);\r
  return Status;\r
}\r
\r
/**\r
  Updates the firmware image of the device.\r
\r
  This function updates the hardware with the new firmware image.\r
  This function returns EFI_UNSUPPORTED if the firmware image is not updatable.\r
  If the firmware image is updatable, the function should perform the following minimal validations\r
  before proceeding to do the firmware image update.\r
  - Validate the image authentication if image has attribute\r
    IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED. The function returns\r
    EFI_SECURITY_VIOLATION if the validation fails.\r
  - Validate the image is a supported image for this device. The function returns EFI_ABORTED if\r
    the image is unsupported. The function can optionally provide more detailed information on\r
    why the image is not a supported image.\r
  - Validate the data from VendorCode if not null. Image validation must be performed before\r
    VendorCode data validation. VendorCode data is ignored or considered invalid if image\r
    validation failed. The function returns EFI_ABORTED if the data is invalid.\r
\r
  VendorCode enables vendor to implement vendor-specific firmware image update policy. Null if\r
  the caller did not specify the policy or use the default policy. As an example, vendor can implement\r
  a policy to allow an option to force a firmware image update when the abort reason is due to the new\r
  firmware image version is older than the current firmware image version or bad image checksum.\r
  Sensitive operations such as those wiping the entire firmware image and render the device to be\r
  non-functional should be encoded in the image itself rather than passed with the VendorCode.\r
  AbortReason enables vendor to have the option to provide a more detailed description of the abort\r
  reason to the caller.\r
\r
  @param[in]  This               A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.\r
  @param[in]  ImageIndex         A unique number identifying the firmware image(s) within the device.\r
                                 The number is between 1 and DescriptorCount.\r
  @param[in]  Image              Points to the new image.\r
  @param[in]  ImageSize          Size of the new image in bytes.\r
  @param[in]  VendorCode         This enables vendor to implement vendor-specific firmware image update policy.\r
                                 Null indicates the caller did not specify the policy or use the default policy.\r
  @param[in]  Progress           A function used by the driver to report the progress of the firmware update.\r
  @param[out] AbortReason        A pointer to a pointer to a null-terminated string providing more\r
                                 details for the aborted operation. The buffer is allocated by this function\r
                                 with AllocatePool(), and it is the caller's responsibility to free it with a\r
                                 call to FreePool().\r
\r
  @retval EFI_SUCCESS            The device was successfully updated with the new image.\r
  @retval EFI_ABORTED            The operation is aborted.\r
  @retval EFI_INVALID_PARAMETER  The Image was NULL.\r
  @retval EFI_UNSUPPORTED        The operation is not supported.\r
  @retval EFI_SECURITY_VIOLATIO  The operation could not be performed due to an authentication failure.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
FmpSetImage (\r
  IN  EFI_FIRMWARE_MANAGEMENT_PROTOCOL                 *This,\r
  IN  UINT8                                            ImageIndex,\r
  IN  CONST VOID                                       *Image,\r
  IN  UINTN                                            ImageSize,\r
  IN  CONST VOID                                       *VendorCode,\r
  IN  EFI_FIRMWARE_MANAGEMENT_UPDATE_IMAGE_PROGRESS    Progress,\r
  OUT CHAR16                                           **AbortReason\r
  )\r
{\r
  EFI_STATUS                 Status;\r
  EFI_STATUS                 VarStatus;\r
  MICROCODE_FMP_PRIVATE_DATA *MicrocodeFmpPrivate;\r
\r
  if (Image == NULL || AbortReason == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  MicrocodeFmpPrivate = MICROCODE_FMP_PRIVATE_DATA_FROM_FMP(This);\r
  *AbortReason     = NULL;\r
\r
  if (ImageIndex == 0 || ImageIndex > MicrocodeFmpPrivate->DescriptorCount || Image == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Status = MicrocodeWrite(ImageIndex, (VOID *)Image, ImageSize, &MicrocodeFmpPrivate->LastAttempt.LastAttemptVersion, &MicrocodeFmpPrivate->LastAttempt.LastAttemptStatus, AbortReason);\r
  DEBUG((DEBUG_INFO, "SetImage - LastAttemp Version - 0x%x, State - 0x%x\n", MicrocodeFmpPrivate->LastAttempt.LastAttemptVersion, MicrocodeFmpPrivate->LastAttempt.LastAttemptStatus));\r
  VarStatus = gRT->SetVariable(\r
                     MICROCODE_FMP_LAST_ATTEMPT_VARIABLE_NAME,\r
                     &gEfiCallerIdGuid,\r
                     EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,\r
                     sizeof(MicrocodeFmpPrivate->LastAttempt),\r
                     &MicrocodeFmpPrivate->LastAttempt\r
                     );\r
  DEBUG((DEBUG_INFO, "SetLastAttemp - %r\n", VarStatus));\r
\r
  if (!EFI_ERROR(Status)) {\r
    InitializeMicrocodeDescriptor(MicrocodeFmpPrivate);\r
  }\r
\r
  return Status;\r
}\r
\r
/**\r
  Checks if the firmware image is valid for the device.\r
\r
  This function allows firmware update application to validate the firmware image without\r
  invoking the SetImage() first.\r
\r
  @param[in]  This               A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.\r
  @param[in]  ImageIndex         A unique number identifying the firmware image(s) within the device.\r
                                 The number is between 1 and DescriptorCount.\r
  @param[in]  Image              Points to the new image.\r
  @param[in]  ImageSize          Size of the new image in bytes.\r
  @param[out] ImageUpdatable     Indicates if the new image is valid for update. It also provides,\r
                                 if available, additional information if the image is invalid.\r
\r
  @retval EFI_SUCCESS            The image was successfully checked.\r
  @retval EFI_INVALID_PARAMETER  The Image was NULL.\r
  @retval EFI_UNSUPPORTED        The operation is not supported.\r
  @retval EFI_SECURITY_VIOLATIO  The operation could not be performed due to an authentication failure.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
FmpCheckImage (\r
  IN  EFI_FIRMWARE_MANAGEMENT_PROTOCOL  *This,\r
  IN  UINT8                             ImageIndex,\r
  IN  CONST VOID                        *Image,\r
  IN  UINTN                             ImageSize,\r
  OUT UINT32                            *ImageUpdatable\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/**\r
  Returns information about the firmware package.\r
\r
  This function returns package information.\r
\r
  @param[in]  This                     A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.\r
  @param[out] PackageVersion           A version number that represents all the firmware images in the device.\r
                                       The format is vendor specific and new version must have a greater value\r
                                       than the old version. If PackageVersion is not supported, the value is\r
                                       0xFFFFFFFF. A value of 0xFFFFFFFE indicates that package version\r
                                       comparison is to be performed using PackageVersionName. A value of\r
                                       0xFFFFFFFD indicates that package version update is in progress.\r
  @param[out] PackageVersionName       A pointer to a pointer to a null-terminated string representing\r
                                       the package version name. The buffer is allocated by this function with\r
                                       AllocatePool(), and it is the caller's responsibility to free it with a\r
                                       call to FreePool().\r
  @param[out] PackageVersionNameMaxLen The maximum length of package version name if device supports update of\r
                                       package version name. A value of 0 indicates the device does not support\r
                                       update of package version name. Length is the number of Unicode characters,\r
                                       including the terminating null character.\r
  @param[out] AttributesSupported      Package attributes that are supported by this device. See 'Package Attribute\r
                                       Definitions' for possible returned values of this parameter. A value of 1\r
                                       indicates the attribute is supported and the current setting value is\r
                                       indicated in AttributesSetting. A value of 0 indicates the attribute is not\r
                                       supported and the current setting value in AttributesSetting is meaningless.\r
  @param[out] AttributesSetting        Package attributes. See 'Package Attribute Definitions' for possible returned\r
                                       values of this parameter\r
\r
  @retval EFI_SUCCESS                  The package information was successfully returned.\r
  @retval EFI_UNSUPPORTED              The operation is not supported.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
FmpGetPackageInfo (\r
  IN  EFI_FIRMWARE_MANAGEMENT_PROTOCOL *This,\r
  OUT UINT32                           *PackageVersion,\r
  OUT CHAR16                           **PackageVersionName,\r
  OUT UINT32                           *PackageVersionNameMaxLen,\r
  OUT UINT64                           *AttributesSupported,\r
  OUT UINT64                           *AttributesSetting\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/**\r
  Updates information about the firmware package.\r
\r
  This function updates package information.\r
  This function returns EFI_UNSUPPORTED if the package information is not updatable.\r
  VendorCode enables vendor to implement vendor-specific package information update policy.\r
  Null if the caller did not specify this policy or use the default policy.\r
\r
  @param[in]  This               A pointer to the EFI_FIRMWARE_MANAGEMENT_PROTOCOL instance.\r
  @param[in]  Image              Points to the authentication image.\r
                                 Null if authentication is not required.\r
  @param[in]  ImageSize          Size of the authentication image in bytes.\r
                                 0 if authentication is not required.\r
  @param[in]  VendorCode         This enables vendor to implement vendor-specific firmware\r
                                 image update policy.\r
                                 Null indicates the caller did not specify this policy or use\r
                                 the default policy.\r
  @param[in]  PackageVersion     The new package version.\r
  @param[in]  PackageVersionName A pointer to the new null-terminated Unicode string representing\r
                                 the package version name.\r
                                 The string length is equal to or less than the value returned in\r
                                 PackageVersionNameMaxLen.\r
\r
  @retval EFI_SUCCESS            The device was successfully updated with the new package\r
                                 information.\r
  @retval EFI_INVALID_PARAMETER  The PackageVersionName length is longer than the value\r
                                 returned in PackageVersionNameMaxLen.\r
  @retval EFI_UNSUPPORTED        The operation is not supported.\r
  @retval EFI_SECURITY_VIOLATIO  The operation could not be performed due to an authentication failure.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
FmpSetPackageInfo (\r
  IN  EFI_FIRMWARE_MANAGEMENT_PROTOCOL   *This,\r
  IN  CONST VOID                         *Image,\r
  IN  UINTN                              ImageSize,\r
  IN  CONST VOID                         *VendorCode,\r
  IN  UINT32                             PackageVersion,\r
  IN  CONST CHAR16                       *PackageVersionName\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/**\r
  Initialize Microcode Descriptor.\r
\r
  @param[in] MicrocodeFmpPrivate private data structure to be initialized.\r
\r
  @return EFI_SUCCESS Microcode Descriptor is initialized.\r
**/\r
EFI_STATUS\r
InitializeMicrocodeDescriptor (\r
  IN MICROCODE_FMP_PRIVATE_DATA *MicrocodeFmpPrivate\r
  )\r
{\r
  UINT8  CurrentMicrocodeCount;\r
\r
  CurrentMicrocodeCount = (UINT8)GetMicrocodeInfo(NULL, 0);\r
\r
  if (CurrentMicrocodeCount > MicrocodeFmpPrivate->DescriptorCount) {\r
    if (MicrocodeFmpPrivate->ImageDescriptor != NULL) {\r
      FreePool(MicrocodeFmpPrivate->ImageDescriptor);\r
      MicrocodeFmpPrivate->ImageDescriptor = NULL;\r
    }\r
  } else {\r
    ZeroMem(MicrocodeFmpPrivate->ImageDescriptor, MicrocodeFmpPrivate->DescriptorCount * sizeof(EFI_FIRMWARE_IMAGE_DESCRIPTOR));\r
  }\r
\r
  MicrocodeFmpPrivate->DescriptorCount = CurrentMicrocodeCount;\r
\r
  if (MicrocodeFmpPrivate->ImageDescriptor == NULL) {\r
    MicrocodeFmpPrivate->ImageDescriptor = AllocateZeroPool(MicrocodeFmpPrivate->DescriptorCount * sizeof(EFI_FIRMWARE_IMAGE_DESCRIPTOR));\r
    if (MicrocodeFmpPrivate->ImageDescriptor == NULL) {\r
      return EFI_OUT_OF_RESOURCES;\r
    }\r
  }\r
\r
  CurrentMicrocodeCount = (UINT8)GetMicrocodeInfo(MicrocodeFmpPrivate->ImageDescriptor, MicrocodeFmpPrivate->DescriptorCount);\r
  ASSERT(CurrentMicrocodeCount == MicrocodeFmpPrivate->DescriptorCount);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Initialize MicrocodeFmpDriver private data structure.\r
\r
  @param[in] MicrocodeFmpPrivate private data structure to be initialized.\r
\r
  @return EFI_SUCCESS private data is initialized.\r
**/\r
EFI_STATUS\r
InitializePrivateData (\r
  IN MICROCODE_FMP_PRIVATE_DATA  *MicrocodeFmpPrivate\r
  )\r
{\r
  EFI_STATUS       Status;\r
  EFI_STATUS       VarStatus;\r
  UINTN            VarSize;\r
\r
  MicrocodeFmpPrivate->Signature       = MICROCODE_FMP_PRIVATE_DATA_SIGNATURE;\r
  MicrocodeFmpPrivate->Handle          = NULL;\r
  CopyMem(&MicrocodeFmpPrivate->Fmp, &mFirmwareManagementProtocol, sizeof(EFI_FIRMWARE_MANAGEMENT_PROTOCOL));\r
\r
  MicrocodeFmpPrivate->PackageVersion = 0x1;\r
  MicrocodeFmpPrivate->PackageVersionName = L"Microcode";\r
\r
  MicrocodeFmpPrivate->LastAttempt.LastAttemptVersion = 0x0;\r
  MicrocodeFmpPrivate->LastAttempt.LastAttemptStatus = 0x0;\r
  VarSize = sizeof(MicrocodeFmpPrivate->LastAttempt);\r
  VarStatus = gRT->GetVariable(\r
                     MICROCODE_FMP_LAST_ATTEMPT_VARIABLE_NAME,\r
                     &gEfiCallerIdGuid,\r
                     NULL,\r
                     &VarSize,\r
                     &MicrocodeFmpPrivate->LastAttempt\r
                     );\r
  DEBUG((DEBUG_INFO, "GetLastAttemp - %r\n", VarStatus));\r
  DEBUG((DEBUG_INFO, "GetLastAttemp Version - 0x%x, State - 0x%x\n", MicrocodeFmpPrivate->LastAttempt.LastAttemptVersion, MicrocodeFmpPrivate->LastAttempt.LastAttemptStatus));\r
\r
  Status = InitializeMicrocodeDescriptor(MicrocodeFmpPrivate);\r
\r
  return Status;\r
}\r
\r
/**\r
  Microcode FMP module entrypoint\r
\r
  @param[in]  ImageHandle       The firmware allocated handle for the EFI image.\r
  @param[in]  SystemTable       A pointer to the EFI System Table.\r
\r
  @return EFI_SUCCESS Microcode FMP module is initialized.\r
**/\r
EFI_STATUS\r
EFIAPI\r
MicrocodeFmpMain (\r
  IN EFI_HANDLE                         ImageHandle,\r
  IN EFI_SYSTEM_TABLE                   *SystemTable\r
  )\r
{\r
  EFI_STATUS                            Status;\r
\r
  //\r
  // Initialize MicrocodeFmpPrivateData\r
  //\r
  mMicrocodeFmpPrivate = AllocateZeroPool (sizeof(MICROCODE_FMP_PRIVATE_DATA));\r
  if (mMicrocodeFmpPrivate == NULL) {\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
\r
  Status = InitializePrivateData(mMicrocodeFmpPrivate);\r
  if (EFI_ERROR(Status)) {\r
    FreePool(mMicrocodeFmpPrivate);\r
    mMicrocodeFmpPrivate = NULL;\r
    return Status;\r
  }\r
\r
  //\r
  // Install FMP protocol.\r
  //\r
  Status = gBS->InstallProtocolInterface (\r
                  &mMicrocodeFmpPrivate->Handle,\r
                  &gEfiFirmwareManagementProtocolGuid,\r
                  EFI_NATIVE_INTERFACE,\r
                  &mMicrocodeFmpPrivate->Fmp\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    FreePool(mMicrocodeFmpPrivate);\r
    mMicrocodeFmpPrivate = NULL;\r
    return Status;\r
  }\r
\r
  return Status;\r
}\r