EmulatorPkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / EmulatorPkg / Library / DxeEmuLib / DxeEmuLib.c

/*++ @file\r
\r
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
Portions copyright (c) 2011, Apple Inc. All rights reserved.\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <PiDxe.h>\r
\r
#include <Library/DebugLib.h>\r
#include <Library/HobLib.h>\r
#include <Library/EmuThunkLib.h>\r
#include <Library/BaseMemoryLib.h>\r
\r
EMU_THUNK_PROTOCOL   *gEmuThunk = NULL;\r
\r
\r
/**\r
  The constructor function caches the pointer of EMU Thunk protocol.\r
\r
  @param  ImageHandle   The firmware allocated handle for the EFI image.\r
  @param  SystemTable   A pointer to the EFI System Table.\r
\r
  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
DxeEmuLibConstructor (\r
  IN EFI_HANDLE        ImageHandle,\r
  IN EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  EFI_HOB_GUID_TYPE        *GuidHob;\r
\r
  GuidHob = GetFirstGuidHob (&gEmuThunkProtocolGuid);\r
  ASSERT (GuidHob != NULL);\r
\r
  gEmuThunk = (EMU_THUNK_PROTOCOL *)(*(UINTN *)(GET_GUID_HOB_DATA (GuidHob)));\r
  ASSERT (gEmuThunk != NULL);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
\r
/**\r
  Serach the EMU IO Thunk database for a matching EMU IO Thunk\r
  Protocol instance.\r
\r
  @param  Protocol   Protocol to search for.\r
  @param  Instance   Instance of protocol to search for.\r
\r
  @retval NULL       Protocol and Instance not found.\r
  @retval other      EMU IO Thunk protocol that matched.\r
\r
**/\r
EMU_IO_THUNK_PROTOCOL *\r
EFIAPI\r
GetIoThunkInstance (\r
  IN  EFI_GUID  *Protocol,\r
  IN  UINTN     Instance\r
  )\r
{\r
  EFI_STATUS              Status;\r
  EMU_IO_THUNK_PROTOCOL   *EmuIoThunk;\r
\r
  for (Status = EFI_SUCCESS, EmuIoThunk = NULL; !EFI_ERROR (Status); ) {\r
    Status = gEmuThunk->GetNextProtocol (FALSE, &EmuIoThunk);\r
    if (EFI_ERROR (Status)) {\r
      break;\r
    }\r
\r
    if (EmuIoThunk->Instance == Instance) {\r
      if (CompareGuid (EmuIoThunk->Protocol, Protocol)) {\r
        return EmuIoThunk;\r
      }\r
    }\r
  }\r
\r
  return NULL;\r
}\r