;------------------------------------------------------------------------------ | |
; | |
; Copyright (c) 2006, Intel Corporation | |
; All rights reserved. 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: | |
; | |
; EnablePaging64.Asm | |
; | |
; Abstract: | |
; | |
; AsmEnablePaging64 function | |
; | |
; Notes: | |
; | |
;------------------------------------------------------------------------------ | |
.686p | |
.model flat,C | |
.code | |
InternalX86EnablePaging64 PROC | |
cli | |
mov [esp], @F ; offset for far retf | |
mov eax, cr4 | |
or al, (1 SHL 5) | |
mov cr4, eax ; enable PAE | |
mov ecx, 0c0000080h | |
rdmsr | |
or ah, 1 ; set LME | |
wrmsr | |
mov eax, cr0 | |
bts eax, 31 | |
mov cr0, eax ; enable paging | |
retf | |
@@: ; long mode starts here | |
DB 67h, 48h | |
mov ebx, [esp] ; mov rbx, [esp] | |
DB 67h, 48h | |
mov ecx, [esp + 8] ; mov rcx, [esp + 8] | |
DB 67h, 48h | |
mov edx, [esp + 10h] ; mov rdx, [esp + 10h] | |
DB 67h, 48h | |
mov esp, [esp + 18h] ; mov rsp, [esp + 18h] | |
DB 48h | |
add esp, -20h ; add rsp, -20h | |
call ebx ; call rbx | |
jmp $ | |
InternalX86EnablePaging64 ENDP | |
END |