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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 | ; DisablePaging64.Asm\r | |
15 | ;\r | |
16 | ; Abstract:\r | |
17 | ;\r | |
18 | ; AsmDisablePaging64 function\r | |
19 | ;\r | |
20 | ; Notes:\r | |
21 | ;\r | |
22 | ;------------------------------------------------------------------------------\r | |
23 | \r | |
24 | .code\r | |
25 | \r | |
26 | InternalX86DisablePaging64 PROC\r | |
27 | cli\r | |
28 | shl rcx, 32\r | |
d9da5f59 | 29 | lea eax, @F\r |
30 | mov ecx, eax\r | |
878ddf1f | 31 | push rcx\r |
32 | mov ebx, edx\r | |
33 | mov esi, r8d\r | |
34 | mov edi, r9d\r | |
35 | mov eax, [rsp + 28h]\r | |
36 | retf\r | |
37 | @@:\r | |
38 | mov esp, eax ; set up new stack\r | |
39 | mov rax, cr0\r | |
40 | btr eax, 31\r | |
41 | mov cr0, rax ; disable paging\r | |
42 | mov ecx, 0c0000080h\r | |
43 | rdmsr\r | |
44 | and ah, NOT 1 ; clear LME\r | |
45 | wrmsr\r | |
46 | mov rax, cr4\r | |
47 | and al, NOT (1 SHL 5) ; clear PAE\r | |
48 | mov cr4, rax\r | |
49 | push rdi\r | |
50 | push rsi\r | |
51 | call rbx\r | |
52 | jmp $\r | |
53 | InternalX86DisablePaging64 ENDP\r | |
54 | \r | |
55 | END\r |