MdePkg/Library/BaseLib/Ia32/Non-existing.c

   1 /** @file
   2   Non-existing BaseLib functions on Ia32
   3
   4   Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
   5   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 <Library/DebugLib.h>
  16
  17 /**
  18   Disables the 64-bit paging mode on the CPU.
  19
  20   Disables the 64-bit paging mode on the CPU and returns to 32-bit protected
  21   mode. This function assumes the current execution mode is 64-paging mode.
  22   This function is only available on x64. After the 64-bit paging mode is
  23   disabled, control is transferred to the function specified by EntryPoint
  24   using the new stack specified by NewStack and passing in the parameters
  25   specified by Context1 and Context2. Context1 and Context2 are optional and
  26   may be 0. The function EntryPoint must never return.
  27
  28   @param  CodeSelector  The 16-bit selector to load in the CS before EntryPoint
  29                         is called. The descriptor in the GDT that this selector
  30                         references must be setup for 32-bit protected mode.
  31   @param  EntryPoint    The 64-bit virtual address of the function to call with
  32                         the new stack after paging is disabled.
  33   @param  Context1      The 64-bit virtual address of the context to pass into
  34                         the EntryPoint function as the first parameter after
  35                         paging is disabled.
  36   @param  Context2      The 64-bit virtual address of the context to pass into
  37                         the EntryPoint function as the second parameter after
  38                         paging is disabled.
  39   @param  NewStack      The 64-bit virtual address of the new stack to use for
  40                         the EntryPoint function after paging is disabled.
  41
  42 **/
  43 VOID
  44 EFIAPI
  45 InternalX86DisablePaging64 (
  46   IN      UINT16                    CodeSelector,
  47   IN      UINT32                    EntryPoint,
  48   IN      UINT32                    Context1,  OPTIONAL
  49   IN      UINT32                    Context2,  OPTIONAL
  50   IN      UINT32                    NewStack
  51   )
  52 {
  53   //
  54   // This function cannot work on IA32 platform
  55   //
  56   ASSERT (FALSE);
  57 }