EdkCompatibilityPkg/Sample/Library/Dxe/WinNt/WinNtLib.c

   1 /*++
   2
   3 Copyright (c) 2004, Intel Corporation. All rights reserved.<BR>
   4 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   WinNtLib.c
  15
  16 Abstract:
  17
  18   Setup gWinNt global
  19
  20 --*/
  21
  22 #include "Efi2WinNT.h"
  23 #include "EfiWinNtLib.h"
  24 #include "EfiDriverLib.h"
  25 #include "EfiHobLib.h"
  26 #include EFI_GUID_DEFINITION (Hob)
  27
  28 EFI_WIN_NT_THUNK_PROTOCOL *gWinNt;
  29
  30 EFI_GUID                  mEfiHobListGuid = EFI_HOB_LIST_GUID;
  31
  32 EFI_STATUS
  33 EfiInitializeWinNtDriverLib (
  34   IN EFI_HANDLE           ImageHandle,
  35   IN EFI_SYSTEM_TABLE     *SystemTable
  36   )
  37 /*++
  38
  39 Routine Description:
  40
  41   Intialize gWinNt and initialize debug console.
  42
  43 Arguments:
  44
  45   (Standard EFI Image entry - EFI_IMAGE_ENTRY_POINT)
  46
  47 Returns:
  48
  49   None
  50
  51 --*/
  52 // TODO:    ImageHandle - add argument and description to function comment
  53 // TODO:    SystemTable - add argument and description to function comment
  54 // TODO:    EFI_NOT_FOUND - add return value to function comment
  55 // TODO:    EFI_NOT_FOUND - add return value to function comment
  56 // TODO:    EFI_SUCCESS - add return value to function comment
  57 {
  58   EFI_STATUS  Status;
  59   VOID        *HobList;
  60   VOID        *Pointer;
  61
  62   Status = EfiLibGetSystemConfigurationTable (&mEfiHobListGuid, &HobList);
  63   if (EFI_ERROR (Status)) {
  64     return EFI_NOT_FOUND;
  65   }
  66
  67   ASSERT (NULL != HobList);
  68   Status = GetNextGuidHob (&HobList, &gEfiWinNtThunkProtocolGuid, &Pointer, NULL);
  69   if (EFI_ERROR (Status)) {
  70     return EFI_NOT_FOUND;
  71   }
  72
  73   gWinNt = (VOID *) (*(UINTN *) (Pointer));
  74   return EFI_SUCCESS;
  75 }