EmbeddedPkg: Fix mispellings

[mirror_edk2.git] / EmbeddedPkg / EmbeddedMonotonicCounter / EmbeddedMonotonicCounter.c

/** @file\r
\r
  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
  \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 <Uefi.h>\r
\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiRuntimeServicesTableLib.h>\r
\r
#include <Protocol/MonotonicCounter.h>\r
\r
UINT64 gCurrentMonotonicCount = 0;\r
\r
EFI_STATUS\r
EFIAPI\r
GetNextMonotonicCount (\r
  OUT UINT64  *Count\r
  )\r
{\r
  if (Count == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
  \r
  *Count = gCurrentMonotonicCount++;\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
GetNextHighMonotonicCount (\r
  OUT UINT32  *HighCount\r
  )\r
{\r
  if (HighCount == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
  \r
  gCurrentMonotonicCount += 0x0000000100000000ULL;\r
  \r
  *HighCount = (UINT32)RShiftU64 (gCurrentMonotonicCount, 32) & 0xFFFFFFFF;\r
\r
  return EFI_SUCCESS;\r
}\r
\r
\r
EFI_STATUS\r
EFIAPI\r
MonotonicCounterDriverInitialize (\r
  IN EFI_HANDLE        ImageHandle,\r
  IN EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  EFI_STATUS  Status;\r
  EFI_HANDLE  Handle = NULL;\r
\r
  // Make sure the Monotonic Counter Architectural Protocol is not already installed in the system\r
  ASSERT_PROTOCOL_ALREADY_INSTALLED(NULL, &gEfiMonotonicCounterArchProtocolGuid);\r
\r
  // Fill in the EFI Boot Services and EFI Runtime Services Monotonic Counter Fields\r
  gBS->GetNextMonotonicCount     = GetNextMonotonicCount;\r
  gRT->GetNextHighMonotonicCount = GetNextHighMonotonicCount;\r
\r
  // Install the Monotonic Counter Architectural Protocol onto a new handle\r
  Status = gBS->InstallMultipleProtocolInterfaces (\r
                  &Handle,\r
                  &gEfiMonotonicCounterArchProtocolGuid,    NULL,\r
                  NULL\r
                  );\r
  return Status;\r
}\r