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1 | ;------------------------------------------------------------------------------ ; |
2 | ; Copyright (c) 2015, Intel Corporation. All rights reserved.<BR> | |
3 | ; This program and the accompanying materials | |
4 | ; are licensed and made available under the terms and conditions of the BSD License | |
5 | ; which accompanies this distribution. The full text of the license may be found at | |
6 | ; http://opensource.org/licenses/bsd-license.php. | |
7 | ; | |
8 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
9 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
10 | ; | |
11 | ; Module Name: | |
12 | ; | |
13 | ; MpFuncs32.asm | |
14 | ; | |
15 | ; Abstract: | |
16 | ; | |
17 | ; This is the assembly code for MP support | |
18 | ; | |
19 | ;------------------------------------------------------------------------------- | |
20 | ||
21 | .686p | |
22 | .model flat | |
23 | ||
24 | include MpEqu.inc | |
25 | .code | |
26 | ||
27 | ||
28 | AsmInitializeGdt PROC near C PUBLIC | |
29 | push ebp | |
30 | mov ebp, esp | |
31 | pushad | |
32 | mov edi, [ebp + 8] ; Load GDT register | |
33 | ||
34 | mov ax,cs ; Get the selector data from our code image | |
35 | mov es,ax | |
36 | lgdt FWORD PTR es:[edi] ; and update the GDTR | |
37 | ||
38 | push PROTECT_MODE_CS | |
39 | lea eax, SetCodeSelectorFarJump | |
40 | push eax | |
41 | retf | |
42 | SetCodeSelectorFarJump: | |
43 | mov ax, PROTECT_MODE_DS ; Update the Base for the new selectors, too | |
44 | mov ds, ax | |
45 | mov es, ax | |
46 | mov fs, ax | |
47 | mov gs, ax | |
48 | mov ss, ax | |
49 | ||
50 | popad | |
51 | pop ebp | |
52 | ret | |
53 | AsmInitializeGdt ENDP | |
54 | ||
55 | END |