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4fc416a6 JJ |
1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
3 | ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r | |
9344f092 | 4 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
4fc416a6 JJ |
5 | ;\r |
6 | ; Module Name:\r | |
7 | ;\r | |
8 | ; EnablePaging32.Asm\r | |
9 | ;\r | |
10 | ; Abstract:\r | |
11 | ;\r | |
12 | ; AsmEnablePaging32 function\r | |
13 | ;\r | |
14 | ; Notes:\r | |
15 | ;\r | |
16 | ;------------------------------------------------------------------------------\r | |
17 | \r | |
18 | SECTION .text\r | |
19 | \r | |
20 | ;------------------------------------------------------------------------------\r | |
21 | ; VOID\r | |
22 | ; EFIAPI\r | |
23 | ; InternalX86EnablePaging32 (\r | |
24 | ; IN SWITCH_STACK_ENTRY_POINT EntryPoint,\r | |
25 | ; IN VOID *Context1, OPTIONAL\r | |
26 | ; IN VOID *Context2, OPTIONAL\r | |
27 | ; IN VOID *NewStack\r | |
28 | ; );\r | |
29 | ;------------------------------------------------------------------------------\r | |
30 | global ASM_PFX(InternalX86EnablePaging32)\r | |
31 | ASM_PFX(InternalX86EnablePaging32):\r | |
32 | mov ebx, [esp + 4]\r | |
33 | mov ecx, [esp + 8]\r | |
34 | mov edx, [esp + 12]\r | |
35 | pushfd\r | |
36 | pop edi ; save flags in edi\r | |
37 | cli\r | |
38 | mov eax, cr0\r | |
39 | bts eax, 31\r | |
40 | mov esp, [esp + 16]\r | |
41 | mov cr0, eax\r | |
42 | push edi\r | |
43 | popfd ; restore flags\r | |
44 | push edx\r | |
45 | push ecx\r | |
46 | call ebx\r | |
47 | jmp $\r | |
48 | \r |