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 |
28 | InternalX86EnablePaging64 PROC\r |
29 | cli\r |
30 | mov [esp], @F ; offset for far retf\r |
31 | mov eax, cr4\r |
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 |
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 |
45 | DB 67h, 48h\r |
46 | mov ecx, [esp + 8] ; mov rcx, [esp + 8]\r |
47 | DB 67h, 48h\r |
48 | mov edx, [esp + 10h] ; mov rdx, [esp + 10h]\r |
49 | DB 67h, 48h\r |
50 | mov esp, [esp + 18h] ; mov rsp, [esp + 18h]\r |
51 | DB 48h\r |
52 | add esp, -20h ; add rsp, -20h\r |
53 | call ebx ; call rbx\r |
54 | jmp $\r |
55 | InternalX86EnablePaging64 ENDP\r |
56 | \r |
57 | END\r |