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
  45
  46 /**
  47   The user Entry Point for DevicePath module.
  48
  49   This is the entrhy point for DevicePath module. It installs the UEFI Device Path Utility Protocol and
  50   optionall the Device Path to Text and Device Path from Text protocols based on feature flags.
  51
  52   @param[in] ImageHandle    The firmware allocated handle for the EFI image.
  53   @param[in] SystemTable    A pointer to the EFI System Table.
  54
  55   @retval EFI_SUCCESS       The entry point is executed successfully.
  56   @retval Others            Some error occurs when executing this entry point.
  57
  58 **/
  59 EFI_STATUS
  60 EFIAPI
  61 DevicePathEntryPoint (
  62   IN EFI_HANDLE           ImageHandle,
  63   IN EFI_SYSTEM_TABLE     *SystemTable
  64   )
  65 {
  66   EFI_STATUS  Status;
  67
  68   Status = EFI_UNSUPPORTED;
  69   if (FeaturePcdGet (PcdDevicePathSupportDevicePathToText)) {
  70     if (FeaturePcdGet (PcdDevicePathSupportDevicePathFromText)) {
  71       Status = gBS->InstallMultipleProtocolInterfaces (
  72                       &mDevicePathHandle,
  73                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  74                       &gEfiDevicePathToTextProtocolGuid,    &mDevicePathToText,
  75                       &gEfiDevicePathFromTextProtocolGuid,  &mDevicePathFromText,
  76                       NULL
  77                       );
  78     } else {
  79       Status = gBS->InstallMultipleProtocolInterfaces (
  80                       &mDevicePathHandle,
  81                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  82                       &gEfiDevicePathToTextProtocolGuid,    &mDevicePathToText,
  83                       NULL
  84                       );
  85     }
  86   } else {
  87     if (FeaturePcdGet (PcdDevicePathSupportDevicePathFromText)) {
  88       Status = gBS->InstallMultipleProtocolInterfaces (
  89                       &mDevicePathHandle,
  90                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  91                       &gEfiDevicePathFromTextProtocolGuid,  &mDevicePathFromText,
  92                       NULL
  93                       );
  94     } else {
  95       Status = gBS->InstallMultipleProtocolInterfaces (
  96                       &mDevicePathHandle,
  97                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  98                       NULL
  99                       );
 100     }
 101   }
 102   return Status;
 103 }