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; Copyright (c) 2004, 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
;------------------------------------------------------------------------------
; VOID
; EFIAPI
; InternalX86EnablePaging64 (
; IN UINT16 Cs,
; IN UINT64 EntryPoint,
; IN UINT64 Context1, OPTIONAL
; IN UINT64 Context2, OPTIONAL
; IN UINT64 NewStack
; );
;------------------------------------------------------------------------------
InternalX86EnablePaging64 PROC
cli
mov [esp], @F ; offset for far retf, seg is the 1st arg
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
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