MdeModulePkg/Universal/DevicePathDxe/DevicePath.c

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   DevicePathDriver.c
  15
  16 Abstract:
  17
  18   Device Path Driver to produce DevPathUtilities Protocol, DevPathFromText Protocol
  19   and DevPathToText Protocol.
  20
  21 --*/
  22
  23 //
  24 // Include common header file for this module.
  25 //
  26 #include "CommonHeader.h"
  27
  28 #include "DevicePath.h"
  29
  30 EFI_HANDLE  mDevicePathHandle = NULL;
  31
  32 GLOBAL_REMOVE_IF_UNREFERENCED const EFI_DEVICE_PATH_UTILITIES_PROTOCOL mDevicePathUtilities = {
  33   GetDevicePathSizeProtocolInterface,
  34   DuplicateDevicePathProtocolInterface,
  35   AppendDevicePathProtocolInterface,
  36   AppendDeviceNodeProtocolInterface,
  37   AppendDevicePathInstanceProtocolInterface,
  38   GetNextDevicePathInstanceProtocolInterface,
  39   IsDevicePathMultiInstanceProtocolInterface,
  40   CreateDeviceNodeProtocolInterface
  41 };
  42
  43 GLOBAL_REMOVE_IF_UNREFERENCED const EFI_DEVICE_PATH_TO_TEXT_PROTOCOL   mDevicePathToText = {
  44   ConvertDeviceNodeToText,
  45   ConvertDevicePathToText
  46 };
  47
  48 GLOBAL_REMOVE_IF_UNREFERENCED const EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL mDevicePathFromText = {
  49   ConvertTextToDeviceNode,
  50   ConvertTextToDevicePath
  51 };
  52
  53 GLOBAL_REMOVE_IF_UNREFERENCED const EFI_GUID mEfiDevicePathMessagingUartFlowControlGuid = DEVICE_PATH_MESSAGING_UART_FLOW_CONTROL;
  54 GLOBAL_REMOVE_IF_UNREFERENCED const EFI_GUID mEfiDevicePathMessagingSASGuid             = DEVICE_PATH_MESSAGING_SAS;
  55
  56 EFI_STATUS
  57 EFIAPI
  58 DevicePathEntryPoint (
  59   IN EFI_HANDLE           ImageHandle,
  60   IN EFI_SYSTEM_TABLE     *SystemTable
  61   )
  62 /*++
  63
  64   Routine Description:
  65     Entry point for EFI drivers.
  66
  67   Arguments:
  68    ImageHandle - EFI_HANDLE
  69    SystemTable - EFI_SYSTEM_TABLE
  70
  71   Returns:
  72     EFI_SUCCESS
  73     others
  74
  75 --*/
  76 {
  77   EFI_STATUS  Status;
  78
  79   Status = EFI_UNSUPPORTED;
  80   if (FeaturePcdGet (PcdDevicePathSupportDevicePathToText)) {
  81     if (FeaturePcdGet (PcdDevicePathSupportDevicePathFromText)) {
  82       Status = gBS->InstallMultipleProtocolInterfaces (
  83                       &mDevicePathHandle,
  84                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  85                       &gEfiDevicePathToTextProtocolGuid,    &mDevicePathToText,
  86                       &gEfiDevicePathFromTextProtocolGuid,  &mDevicePathFromText,
  87                       NULL
  88                       );
  89     } else {
  90       Status = gBS->InstallMultipleProtocolInterfaces (
  91                       &mDevicePathHandle,
  92                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
  93                       &gEfiDevicePathToTextProtocolGuid,    &mDevicePathToText,
  94                       NULL
  95                       );
  96     }
  97   } else {
  98     if (FeaturePcdGet (PcdDevicePathSupportDevicePathFromText)) {
  99       Status = gBS->InstallMultipleProtocolInterfaces (
 100                       &mDevicePathHandle,
 101                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
 102                       &gEfiDevicePathFromTextProtocolGuid,  &mDevicePathFromText,
 103                       NULL
 104                       );
 105     } else {
 106       Status = gBS->InstallMultipleProtocolInterfaces (
 107                       &mDevicePathHandle,
 108                       &gEfiDevicePathUtilitiesProtocolGuid, &mDevicePathUtilities,
 109                       NULL
 110                       );
 111     }
 112   }
 113   return Status;
 114 }