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 - 2008, Intel Corporation. <BR>
   6 All rights reserved. This program and the accompanying materials
   7 are licensed and made available under the terms and conditions of the BSD License
   8 which accompanies this distribution.  The full text of the license may be found at
   9 http://opensource.org/licenses/bsd-license.php
  10
  11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include "DevicePath.h"
  17
  18 EFI_HANDLE  mDevicePathHandle = NULL;
  19
  20 GLOBAL_REMOVE_IF_UNREFERENCED const EFI_DEVICE_PATH_UTILITIES_PROTOCOL mDevicePathUtilities = {
  21   GetDevicePathSizeProtocolInterface,
  22   DuplicateDevicePathProtocolInterface,
  23   AppendDevicePathProtocolInterface,
  24   AppendDeviceNodeProtocolInterface,
  25   AppendDevicePathInstanceProtocolInterface,
  26   GetNextDevicePathInstanceProtocolInterface,
  27   IsDevicePathMultiInstanceProtocolInterface,
  28   CreateDeviceNodeProtocolInterface
  29 };
  30
  31 GLOBAL_REMOVE_IF_UNREFERENCED const EFI_DEVICE_PATH_TO_TEXT_PROTOCOL   mDevicePathToText = {
  32   ConvertDeviceNodeToText,
  33   ConvertDevicePathToText
  34 };
  35
  36 GLOBAL_REMOVE_IF_UNREFERENCED const EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL mDevicePathFromText = {
  37   ConvertTextToDeviceNode,
  38   ConvertTextToDevicePath
  39 };
  40
  41 GLOBAL_REMOVE_IF_UNREFERENCED const EFI_GUID mEfiDevicePathMessagingUartFlowControlGuid = DEVICE_PATH_MESSAGING_UART_FLOW_CONTROL;
  42 GLOBAL_REMOVE_IF_UNREFERENCED const EFI_GUID mEfiDevicePathMessagingSASGuid             = DEVICE_PATH_MESSAGING_SAS;
  43
  44 EFI_STATUS
  45 EFIAPI
  46 DevicePathEntryPoint (
  47   IN EFI_HANDLE           ImageHandle,
  48   IN EFI_SYSTEM_TABLE     *SystemTable
  49   )
  50 /*++
  51
  52   Routine Description:
  53     Entry point for EFI drivers.
  54
  55   Arguments:
  56    ImageHandle - EFI_HANDLE
  57    SystemTable - EFI_SYSTEM_TABLE
  58
  59   Returns:
  60     EFI_SUCCESS
  61     others
  62
  63 --*/
  64 {
  65   EFI_STATUS  Status;
  66
  67   Status = EFI_UNSUPPORTED;
  68   if (FeaturePcdGet (PcdDevicePathSupportDevicePathToText)) {
  69     if (FeaturePcdGet (PcdDevicePathSupportDevicePathFromText)) {
  70       Status = gBS->InstallMultipleProtocolInterfaces (
  71                       &mDevicePathHandle,
  72                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  73                       &gEfiDevicePathToTextProtocolGuid,    &mDevicePathToText,
  74                       &gEfiDevicePathFromTextProtocolGuid,  &mDevicePathFromText,
  75                       NULL
  76                       );
  77     } else {
  78       Status = gBS->InstallMultipleProtocolInterfaces (
  79                       &mDevicePathHandle,
  80                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  81                       &gEfiDevicePathToTextProtocolGuid,    &mDevicePathToText,
  82                       NULL
  83                       );
  84     }
  85   } else {
  86     if (FeaturePcdGet (PcdDevicePathSupportDevicePathFromText)) {
  87       Status = gBS->InstallMultipleProtocolInterfaces (
  88                       &mDevicePathHandle,
  89                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  90                       &gEfiDevicePathFromTextProtocolGuid,  &mDevicePathFromText,
  91                       NULL
  92                       );
  93     } else {
  94       Status = gBS->InstallMultipleProtocolInterfaces (
  95                       &mDevicePathHandle,
  96                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  97                       NULL
  98                       );
  99     }
 100   }
 101   return Status;
 102 }