EmuThunk.c

/*++ @file
 
Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2011, Apple Inc. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
 
 
**/
#include <PiDxe.h>
 
#include <Protocol/DevicePath.h>
#include <Protocol/EmuThunk.h>
 
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/EmuThunkLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DevicePathLib.h>
 
//
// EmuThunk Device Path Protocol Instance
//
EMU_THUNK_DEVICE_PATH  mEmuThunkDevicePath = {
  {
    {
      {
        HARDWARE_DEVICE_PATH,
        HW_VENDOR_DP,
        {
          (UINT8)(sizeof (EMU_VENDOR_DEVICE_PATH_NODE)),
          (UINT8)((sizeof (EMU_VENDOR_DEVICE_PATH_NODE)) >> 8)
        }
      },
      EMU_THUNK_PROTOCOL_GUID
    },
    0
  },
  {
    END_DEVICE_PATH_TYPE,
    END_ENTIRE_DEVICE_PATH_SUBTYPE,
    {
      END_DEVICE_PATH_LENGTH,
      0
    }
  }
};
 
EFI_STATUS
EFIAPI
InitializeEmuThunk (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
 
/*++
 
Routine Description:
  Install UnixThunk Protocol and it's associated Device Path protocol
 
Arguments:
  (Standard EFI Image entry - EFI_IMAGE_ENTRY_POINT)
 
Returns:
  EFI_SUCEESS - UnixThunk protocol is added or error status from
                gBS->InstallMultiProtocolInterfaces().
 
**/
{
  EFI_STATUS  Status;
  EFI_HANDLE  Handle;
 
  Handle = NULL;
  Status = gBS->InstallMultipleProtocolInterfaces (
                  &Handle,
                  &gEmuThunkProtocolGuid,
                  gEmuThunk,
                  &gEfiDevicePathProtocolGuid,
                  &mEmuThunkDevicePath,
                  NULL
                  );
 
  return Status;
}