MdeModulePkg/Universal/DevicePathDxe/DevicePath.c

   1 /** @file
   2   Device Path Driver to produce DevPathUtilities Protocol, DevPathFromText Protocol
   3   and DevPathToText Protocol.
   4
   5 Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
   6 SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include <Uefi.h>
  11 #include <Protocol/DevicePathUtilities.h>
  12 #include <Protocol/DevicePathToText.h>
  13 #include <Protocol/DevicePathFromText.h>
  14 #include <Library/UefiDriverEntryPoint.h>
  15 #include <Library/UefiBootServicesTableLib.h>
  16 #include <Library/DevicePathLib.h>
  17 #include <Library/PcdLib.h>
  18
  19 GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_DEVICE_PATH_UTILITIES_PROTOCOL mDevicePathUtilities = {
  20   GetDevicePathSize,
  21   DuplicateDevicePath,
  22   AppendDevicePath,
  23   AppendDevicePathNode,
  24   AppendDevicePathInstance,
  25   GetNextDevicePathInstance,
  26   IsDevicePathMultiInstance,
  27   CreateDeviceNode
  28 };
  29
  30 GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_DEVICE_PATH_TO_TEXT_PROTOCOL   mDevicePathToText = {
  31   ConvertDeviceNodeToText,
  32   ConvertDevicePathToText
  33 };
  34
  35 GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL mDevicePathFromText = {
  36   ConvertTextToDeviceNode,
  37   ConvertTextToDevicePath
  38 };
  39
  40 /**
  41   The user Entry Point for DevicePath module.
  42
  43   This is the entry point for DevicePath module. It installs the UEFI Device Path Utility Protocol and
  44   optionally the Device Path to Text and Device Path from Text protocols based on feature flags.
  45
  46   @param[in] ImageHandle    The firmware allocated handle for the EFI image.
  47   @param[in] SystemTable    A pointer to the EFI System Table.
  48
  49   @retval EFI_SUCCESS       The entry point is executed successfully.
  50   @retval Others            Some error occurs when executing this entry point.
  51
  52 **/
  53 EFI_STATUS
  54 EFIAPI
  55 DevicePathEntryPoint (
  56   IN EFI_HANDLE           ImageHandle,
  57   IN EFI_SYSTEM_TABLE     *SystemTable
  58   )
  59 {
  60   EFI_STATUS  Status;
  61   EFI_HANDLE  Handle;
  62
  63   Handle = NULL;
  64   Status = EFI_UNSUPPORTED;
  65   if (FeaturePcdGet (PcdDevicePathSupportDevicePathToText)) {
  66     if (FeaturePcdGet (PcdDevicePathSupportDevicePathFromText)) {
  67       Status = gBS->InstallMultipleProtocolInterfaces (
  68                       &Handle,
  69                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  70                       &gEfiDevicePathToTextProtocolGuid,    &mDevicePathToText,
  71                       &gEfiDevicePathFromTextProtocolGuid,  &mDevicePathFromText,
  72                       NULL
  73                       );
  74     } else {
  75       Status = gBS->InstallMultipleProtocolInterfaces (
  76                       &Handle,
  77                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  78                       &gEfiDevicePathToTextProtocolGuid,    &mDevicePathToText,
  79                       NULL
  80                       );
  81     }
  82   } else {
  83     if (FeaturePcdGet (PcdDevicePathSupportDevicePathFromText)) {
  84       Status = gBS->InstallMultipleProtocolInterfaces (
  85                       &Handle,
  86                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  87                       &gEfiDevicePathFromTextProtocolGuid,  &mDevicePathFromText,
  88                       NULL
  89                       );
  90     } else {
  91       Status = gBS->InstallMultipleProtocolInterfaces (
  92                       &Handle,
  93                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  94                       NULL
  95                       );
  96     }
  97   }
  98   return Status;
  99 }