MdeModulePkg/Application/HelloWorld/HelloWorld.c

   1 /** @file
   2   This simple application just print a "UEFI Hello World!" to the UEFI Console.
   3
   4   Copyright (c) 2006 - 2007, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <Uefi.h>
  16 #include <Library/PcdLib.h>
  17 #include <Library/UefiLib.h>
  18 #include <Library/UefiApplicationEntryPoint.h>
  19
  20
  21 /**
  22   The user Entry Point for Application. The user code starts with this function
  23   as the real entry point for the image goes into a library that calls this
  24   function.
  25
  26   @param[in] ImageHandle    The firmware allocated handle for the EFI image.
  27   @param[in] SystemTable    A pointer to the EFI System Table.
  28
  29   @retval EFI_SUCCESS       The entry point is executed successfully.
  30   @retval other             Some error occurs when executing this entry point.
  31
  32 **/
  33 EFI_STATUS
  34 EFIAPI
  35 UefiMain (
  36   IN EFI_HANDLE        ImageHandle,
  37   IN EFI_SYSTEM_TABLE  *SystemTable
  38   )
  39 {
  40         UINT32 Index;
  41
  42         Index = 0;
  43
  44   //
  45   // Three PCD type (FeatureFlag, UINT32 and String) are used as the sample.
  46   //
  47   if (FeaturePcdGet (PcdHelloWorldPrintEnable)) {
  48         for (Index = 0; Index < PcdGet32 (PcdHelloWorldPrintTimes); Index ++) {
  49         Print ((CHAR16*)PcdGetPtr (PcdHelloWorldPrintString));
  50     }
  51   }
  52
  53   return EFI_SUCCESS;
  54 }