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 24 ASM_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 #------------------------------------------------------------------------------ 36 ASM_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
