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# DisablePaging32.S 15# 16# Abstract: 17# 18# InternalX86DisablePaging32 function 19# 20# Notes: 21# 22#------------------------------------------------------------------------------ 23 24ASM_GLOBAL ASM_PFX(InternalX86DisablePaging32) 25 26#------------------------------------------------------------------------------ 27# VOID 28# EFIAPI 29# InternalX86DisablePaging32 ( 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(InternalX86DisablePaging32): 37 movl 4(%esp), %ebx 38 movl 8(%esp), %ecx 39 movl 12(%esp), %edx 40 pushfl 41 pop %edi # save EFLAGS to edi 42 cli 43 movl %cr0, %eax 44 btrl $31, %eax 45 movl 16(%esp), %esp 46 movl %eax, %cr0 47 push %edi 48 popfl # restore EFLAGS from edi 49 push %edx 50 push %ecx 51 call *%ebx 52 jmp . # EntryPoint() should not return 53