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
InternalX86DisablePaging64(IN UINT16 CodeSelector,IN UINT32 EntryPoint,IN UINT32 Context1,OPTIONAL IN UINT32 Context2,OPTIONAL IN UINT32 NewStack)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 }
58