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[mirror_edk2.git] / SecurityPkg / Tcg / MemoryOverwriteRequestControlLock / TcgMorLock.h

/** @file\r
   TCG MOR (Memory Overwrite Request) Lock Control Driver header file.\r
\r
Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#ifndef _EFI_TCG_MOR_LOCK_H_\r
#define _EFI_TCG_MOR_LOCK_H_\r
\r
/**\r
  This service is a wrapper for the UEFI Runtime Service GetVariable().\r
\r
  @param  VariableName the name of the vendor's variable, it's a Null-Terminated Unicode String\r
  @param  VendorGuid   Unify identifier for vendor.\r
  @param  Attributes   Point to memory location to return the attributes of variable. If the point\r
                       is NULL, the parameter would be ignored.\r
  @param  DataSize     As input, point to the maximum size of return Data-Buffer.\r
                       As output, point to the actual size of the returned Data-Buffer.\r
  @param  Data         Point to return Data-Buffer.\r
\r
  @retval  EFI_SUCCESS            The function completed successfully.\r
  @retval  EFI_NOT_FOUND          The variable was not found.\r
  @retval  EFI_BUFFER_TOO_SMALL   The DataSize is too small for the result. DataSize has\r
                                  been updated with the size needed to complete the request.\r
  @retval  EFI_INVALID_PARAMETER  VariableName is NULL.\r
  @retval  EFI_INVALID_PARAMETER  VendorGuid is NULL.\r
  @retval  EFI_INVALID_PARAMETER  DataSize is NULL.\r
  @retval  EFI_INVALID_PARAMETER  The DataSize is not too small and Data is NULL.\r
  @retval  EFI_DEVICE_ERROR       The variable could not be retrieved due to a hardware error.\r
  @retval  EFI_SECURITY_VIOLATION The variable could not be retrieved due to an authentication failure.\r
**/\r
EFI_STATUS\r
EFIAPI\r
InternalGetVariable (\r
  IN      CHAR16    *VariableName,\r
  IN      EFI_GUID  *VendorGuid,\r
  OUT     UINT32    *Attributes OPTIONAL,\r
  IN OUT  UINTN     *DataSize,\r
  OUT     VOID      *Data\r
  );\r
\r
/**\r
  This service is a wrapper for the UEFI Runtime Service SetVariable()\r
\r
  @param  VariableName the name of the vendor's variable, as a\r
                       Null-Terminated Unicode String\r
  @param  VendorGuid   Unify identifier for vendor.\r
  @param  Attributes   Point to memory location to return the attributes of variable. If the point\r
                       is NULL, the parameter would be ignored.\r
  @param  DataSize     The size in bytes of Data-Buffer.\r
  @param  Data         Point to the content of the variable.\r
\r
  @retval  EFI_SUCCESS            The firmware has successfully stored the variable and its data as\r
                                  defined by the Attributes.\r
  @retval  EFI_INVALID_PARAMETER  An invalid combination of attribute bits was supplied, or the\r
                                  DataSize exceeds the maximum allowed.\r
  @retval  EFI_INVALID_PARAMETER  VariableName is an empty Unicode string.\r
  @retval  EFI_OUT_OF_RESOURCES   Not enough storage is available to hold the variable and its data.\r
  @retval  EFI_DEVICE_ERROR       The variable could not be saved due to a hardware failure.\r
  @retval  EFI_WRITE_PROTECTED    The variable in question is read-only.\r
  @retval  EFI_WRITE_PROTECTED    The variable in question cannot be deleted.\r
  @retval  EFI_SECURITY_VIOLATION The variable could not be written due to EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS\r
                                  set but the AuthInfo does NOT pass the validation check carried\r
                                  out by the firmware.\r
  @retval  EFI_NOT_FOUND          The variable trying to be updated or deleted was not found.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
InternalSetVariable (\r
  IN CHAR16    *VariableName,\r
  IN EFI_GUID  *VendorGuid,\r
  IN UINT32    Attributes,\r
  IN UINTN     DataSize,\r
  IN VOID      *Data\r
  );\r
\r
/**\r
  This service is a checker handler for the UEFI Runtime Service SetVariable()\r
\r
  @param  VariableName the name of the vendor's variable, as a\r
                       Null-Terminated Unicode String\r
  @param  VendorGuid   Unify identifier for vendor.\r
  @param  Attributes   Point to memory location to return the attributes of variable. If the point\r
                       is NULL, the parameter would be ignored.\r
  @param  DataSize     The size in bytes of Data-Buffer.\r
  @param  Data         Point to the content of the variable.\r
\r
  @retval  EFI_SUCCESS            The firmware has successfully stored the variable and its data as\r
                                  defined by the Attributes.\r
  @retval  EFI_INVALID_PARAMETER  An invalid combination of attribute bits was supplied, or the\r
                                  DataSize exceeds the maximum allowed.\r
  @retval  EFI_INVALID_PARAMETER  VariableName is an empty Unicode string.\r
  @retval  EFI_OUT_OF_RESOURCES   Not enough storage is available to hold the variable and its data.\r
  @retval  EFI_DEVICE_ERROR       The variable could not be saved due to a hardware failure.\r
  @retval  EFI_WRITE_PROTECTED    The variable in question is read-only.\r
  @retval  EFI_WRITE_PROTECTED    The variable in question cannot be deleted.\r
  @retval  EFI_SECURITY_VIOLATION The variable could not be written due to EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS\r
                                  set but the AuthInfo does NOT pass the validation check carried\r
                                  out by the firmware.\r
  @retval  EFI_NOT_FOUND          The variable trying to be updated or deleted was not found.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
SetVariableCheckHandlerMor (\r
  IN CHAR16    *VariableName,\r
  IN EFI_GUID  *VendorGuid,\r
  IN UINT32    Attributes,\r
  IN UINTN     DataSize,\r
  IN VOID      *Data\r
  );\r
\r
/**\r
  Entry Point for MOR Lock Control driver.\r
\r
  @param[in] ImageHandle  Image handle of this driver.\r
  @param[in] SystemTable  A Pointer to the EFI System Table.\r
\r
  @retval EFI_SUCCESS\r
  @return Others          Some error occurs.\r
**/\r
EFI_STATUS\r
EFIAPI\r
MorLockDriverInit (\r
  VOID\r
  );\r
\r
#endif\r