1#------------------------------------------------------------------------------
2#
3# Copyright (c) 2006 - 2008, 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#   EnablePaging32.S
15#
16# Abstract:
17#
18#   InternalX86EnablePaging32 function
19#
20# Notes:
21#
22#------------------------------------------------------------------------------
23
24ASM_GLOBAL ASM_PFX(InternalX86EnablePaging32)
25
26#------------------------------------------------------------------------------
27# VOID
28# EFIAPI
29# InternalX86EnablePaging32 (
30#   IN      SWITCH_STACK_ENTRY_POINT  EntryPoint,
31#   IN      VOID                      *Context1,    OPTIONAL
32#   IN      VOID                      *Context2,    OPTIONAL
33#   IN      VOID                      *NewStack
34#   );
35#------------------------------------------------------------------------------
36ASM_PFX(InternalX86EnablePaging32):
37    movl    4(%esp), %ebx
38    movl    8(%esp), %ecx
39    movl    12(%esp), %edx
40    pushfl
41    pop     %edi                        # save flags in edi
42    cli
43    movl    %cr0, %eax
44    btsl    $31, %eax
45    movl    16(%esp), %esp
46    movl    %eax, %cr0
47    push    %edi
48    popfl                               # restore flags
49    push    %edx
50    push    %ecx
51    call    *%ebx
52    jmp     .
53