DevicePath.c

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#include <Uefi.h>
#include <Protocol/DevicePathUtilities.h>
#include <Protocol/DevicePathToText.h>
#include <Protocol/DevicePathFromText.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DevicePathLib.h>
#include <Library/PcdLib.h>
 
GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_DEVICE_PATH_UTILITIES_PROTOCOL  mDevicePathUtilities = {
  GetDevicePathSize,
  DuplicateDevicePath,
  AppendDevicePath,
  AppendDevicePathNode,
  AppendDevicePathInstance,
  GetNextDevicePathInstance,
  IsDevicePathMultiInstance,
  CreateDeviceNode
};
 
GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  mDevicePathToText = {
  ConvertDeviceNodeToText,
  ConvertDevicePathToText
};
 
GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL  mDevicePathFromText = {
  ConvertTextToDeviceNode,
  ConvertTextToDevicePath
};
 
EFI_STATUS
EFIAPI
DevicePathEntryPoint (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;
  EFI_HANDLE  Handle;
 
  Handle = NULL;
  Status = EFI_UNSUPPORTED;
  if (FeaturePcdGet (PcdDevicePathSupportDevicePathToText)) {
    if (FeaturePcdGet (PcdDevicePathSupportDevicePathFromText)) {
      Status = gBS->InstallMultipleProtocolInterfaces (
                      &Handle,
                      &gEfiDevicePathUtilitiesProtocolGuid,
                      &mDevicePathUtilities,
                      &gEfiDevicePathToTextProtocolGuid,
                      &mDevicePathToText,
                      &gEfiDevicePathFromTextProtocolGuid,
                      &mDevicePathFromText,
                      NULL
                      );
    } else {
      Status = gBS->InstallMultipleProtocolInterfaces (
                      &Handle,
                      &gEfiDevicePathUtilitiesProtocolGuid,
                      &mDevicePathUtilities,
                      &gEfiDevicePathToTextProtocolGuid,
                      &mDevicePathToText,
                      NULL
                      );
    }
  } else {
    if (FeaturePcdGet (PcdDevicePathSupportDevicePathFromText)) {
      Status = gBS->InstallMultipleProtocolInterfaces (
                      &Handle,
                      &gEfiDevicePathUtilitiesProtocolGuid,
                      &mDevicePathUtilities,
                      &gEfiDevicePathFromTextProtocolGuid,
                      &mDevicePathFromText,
                      NULL
                      );
    } else {
      Status = gBS->InstallMultipleProtocolInterfaces (
                      &Handle,
                      &gEfiDevicePathUtilitiesProtocolGuid,
                      &mDevicePathUtilities,
                      NULL
                      );
    }
  }
 
  return Status;
}