#------------------------------------------------------------------------------ | |
# | |
# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
# This program and the accompanying materials | |
# are licensed and made available under the terms and conditions of the BSD License | |
# which accompanies this distribution. The full text of the license may be found at | |
# http://opensource.org/licenses/bsd-license.php. | |
# | |
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
# | |
# Module Name: | |
# | |
# DisablePaging32.S | |
# | |
# Abstract: | |
# | |
# InternalX86DisablePaging32 function | |
# | |
# Notes: | |
# | |
#------------------------------------------------------------------------------ | |
ASM_GLOBAL ASM_PFX(InternalX86DisablePaging32) | |
#------------------------------------------------------------------------------ | |
# VOID | |
# EFIAPI | |
# InternalX86DisablePaging32 ( | |
# IN SWITCH_STACK_ENTRY_POINT EntryPoint, | |
# IN VOID *Context1, OPTIONAL | |
# IN VOID *Context2, OPTIONAL | |
# IN VOID *NewStack | |
# ); | |
#------------------------------------------------------------------------------ | |
ASM_PFX(InternalX86DisablePaging32): | |
movl 4(%esp), %ebx | |
movl 8(%esp), %ecx | |
movl 12(%esp), %edx | |
pushfl | |
pop %edi # save EFLAGS to edi | |
cli | |
movl %cr0, %eax | |
btrl $31, %eax | |
movl 16(%esp), %esp | |
movl %eax, %cr0 | |
push %edi | |
popfl # restore EFLAGS from edi | |
push %edx | |
push %ecx | |
call *%ebx | |
jmp . # EntryPoint() should not return |