;------------------------------------------------------------------------------

;

; Copyright (c) 2006, 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:

;

; 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 ; set PG

mov cr0, eax ; enable paging

retf ; topmost 2 dwords hold the address

@@: ; long mode starts here

DB 67h, 48h ; 32-bit address size, 64-bit operand size

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

hlt ; no one should get here

InternalX86EnablePaging64 ENDP

END