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246cd908 LG |
1 | ;------------------------------------------------------------------------------ ;\r |
2 | ; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r | |
3 | ; This program and the accompanying materials\r | |
4 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
5 | ; which accompanies this distribution. The full text of the license may be found at\r | |
6 | ; http://opensource.org/licenses/bsd-license.php.\r | |
7 | ;\r | |
8 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
9 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
10 | ;\r | |
11 | ; Module Name:\r | |
12 | ;\r | |
13 | ; SmmInit.nasm\r | |
14 | ;\r | |
15 | ; Abstract:\r | |
16 | ;\r | |
17 | ; Functions for relocating SMBASE's for all processors\r | |
18 | ;\r | |
19 | ;-------------------------------------------------------------------------------\r | |
20 | \r | |
21 | extern ASM_PFX(SmmInitHandler)\r | |
22 | extern ASM_PFX(mRebasedFlag)\r | |
23 | extern ASM_PFX(mSmmRelocationOriginalAddress)\r | |
24 | \r | |
25 | global ASM_PFX(gSmmCr3)\r | |
26 | global ASM_PFX(gSmmCr4)\r | |
27 | global ASM_PFX(gSmmCr0)\r | |
28 | global ASM_PFX(gSmmJmpAddr)\r | |
29 | global ASM_PFX(gSmmInitStack)\r | |
30 | global ASM_PFX(gcSmiInitGdtr)\r | |
31 | global ASM_PFX(gcSmmInitSize)\r | |
32 | global ASM_PFX(gcSmmInitTemplate)\r | |
33 | \r | |
34 | %define PROTECT_MODE_CS 0x8\r | |
35 | %define PROTECT_MODE_DS 0x20\r | |
36 | \r | |
37 | SECTION .text\r | |
38 | \r | |
39 | ASM_PFX(gcSmiInitGdtr):\r | |
40 | DW 0\r | |
41 | DQ 0\r | |
42 | \r | |
43 | global ASM_PFX(SmmStartup)\r | |
44 | ASM_PFX(SmmStartup):\r | |
45 | DB 0x66, 0xb8\r | |
46 | ASM_PFX(gSmmCr3): DD 0\r | |
47 | mov cr3, eax\r | |
48 | DB 0x67, 0x66\r | |
49 | lgdt [cs:ebp + (ASM_PFX(gcSmiInitGdtr) - ASM_PFX(SmmStartup))]\r | |
50 | DB 0x66, 0xb8\r | |
51 | ASM_PFX(gSmmCr4): DD 0\r | |
52 | mov cr4, eax\r | |
53 | DB 0x66, 0xb8\r | |
54 | ASM_PFX(gSmmCr0): DD 0\r | |
55 | DB 0xbf, PROTECT_MODE_DS, 0 ; mov di, PROTECT_MODE_DS\r | |
56 | mov cr0, eax\r | |
57 | DB 0x66, 0xea ; jmp far [ptr48]\r | |
58 | ASM_PFX(gSmmJmpAddr):\r | |
59 | DD @32bit\r | |
60 | DW PROTECT_MODE_CS\r | |
61 | @32bit:\r | |
62 | mov ds, edi\r | |
63 | mov es, edi\r | |
64 | mov fs, edi\r | |
65 | mov gs, edi\r | |
66 | mov ss, edi\r | |
67 | DB 0xbc ; mov esp, imm32\r | |
68 | ASM_PFX(gSmmInitStack): DD 0\r | |
69 | call ASM_PFX(SmmInitHandler)\r | |
70 | rsm\r | |
71 | \r | |
72 | BITS 16\r | |
73 | ASM_PFX(gcSmmInitTemplate):\r | |
74 | mov ebp, ASM_PFX(SmmStartup)\r | |
75 | sub ebp, 0x30000\r | |
76 | jmp ebp\r | |
77 | \r | |
78 | ASM_PFX(gcSmmInitSize): DW $ - ASM_PFX(gcSmmInitTemplate)\r | |
79 | \r | |
80 | BITS 32\r | |
81 | global ASM_PFX(SmmRelocationSemaphoreComplete)\r | |
82 | ASM_PFX(SmmRelocationSemaphoreComplete):\r | |
83 | push eax\r | |
84 | mov eax, [ASM_PFX(mRebasedFlag)]\r | |
85 | mov byte [eax], 1\r | |
86 | pop eax\r | |
87 | jmp [ASM_PFX(mSmmRelocationOriginalAddress)]\r |