1.Updated some functions header of BaseLib with new MWG spec
[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / EnablePaging64.asm
CommitLineData
878ddf1f 1;------------------------------------------------------------------------------\r
2;\r
3; Copyright (c) 2006, Intel Corporation\r
4; All rights reserved. This program and the accompanying materials\r
5; are licensed and made available under the terms and conditions of the BSD License\r
6; which accompanies this distribution. The full text of the license may be found at\r
7; http://opensource.org/licenses/bsd-license.php\r
8;\r
9; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
10; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
11;\r
12; Module Name:\r
13;\r
14; EnablePaging64.Asm\r
15;\r
16; Abstract:\r
17;\r
18; AsmEnablePaging64 function\r
19;\r
20; Notes:\r
21;\r
22;------------------------------------------------------------------------------\r
23\r
24 .686p\r
25 .model flat,C\r
26 .code\r
27\r
28InternalX86EnablePaging64 PROC\r
30817eb4 29 cli\r
30 mov [esp], @F ; offset for far retf\r
31 mov eax, cr4\r
878ddf1f 32 or al, (1 SHL 5)\r
33 mov cr4, eax ; enable PAE\r
34 mov ecx, 0c0000080h\r
35 rdmsr\r
36 or ah, 1 ; set LME\r
37 wrmsr\r
38 mov eax, cr0\r
39 bts eax, 31\r
30817eb4 40 mov cr0, eax ; enable paging\r
41 retf\r
42@@: ; long mode starts here\r
43 DB 67h, 48h\r
44 mov ebx, [esp] ; mov rbx, [esp]\r
878ddf1f 45 DB 67h, 48h\r
30817eb4 46 mov ecx, [esp + 8] ; mov rcx, [esp + 8]\r
878ddf1f 47 DB 67h, 48h\r
30817eb4 48 mov edx, [esp + 10h] ; mov rdx, [esp + 10h]\r
878ddf1f 49 DB 67h, 48h\r
30817eb4 50 mov esp, [esp + 18h] ; mov rsp, [esp + 18h]\r
878ddf1f 51 DB 48h\r
30817eb4 52 add esp, -20h ; add rsp, -20h\r
878ddf1f 53 call ebx ; call rbx\r
54 jmp $\r
55InternalX86EnablePaging64 ENDP\r
56\r
57 END\r