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1 | #------------------------------------------------------------------------------\r |
2 | #\r | |
3 | # Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>\r | |
4 | # 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 | # SmmInit.S\r | |
15 | #\r | |
16 | # Abstract:\r | |
17 | #\r | |
18 | # Functions for relocating SMBASE's for all processors\r | |
19 | #\r | |
20 | #------------------------------------------------------------------------------\r | |
21 | \r | |
22 | ASM_GLOBAL ASM_PFX(gSmmCr0)\r | |
23 | ASM_GLOBAL ASM_PFX(gSmmCr3)\r | |
24 | ASM_GLOBAL ASM_PFX(gSmmCr4)\r | |
25 | ASM_GLOBAL ASM_PFX(gcSmmInitTemplate)\r | |
26 | ASM_GLOBAL ASM_PFX(gcSmmInitSize)\r | |
27 | ASM_GLOBAL ASM_PFX(gSmmJmpAddr)\r | |
28 | ASM_GLOBAL ASM_PFX(SmmRelocationSemaphoreComplete)\r | |
29 | ASM_GLOBAL ASM_PFX(gSmmInitStack)\r | |
30 | ASM_GLOBAL ASM_PFX(gcSmiInitGdtr)\r | |
31 | \r | |
32 | .equ PROTECT_MODE_CS, 0x08\r | |
33 | .equ PROTECT_MODE_DS, 0x20\r | |
34 | \r | |
35 | .text\r | |
36 | \r | |
37 | ASM_PFX(gcSmiInitGdtr):\r | |
38 | .word 0\r | |
39 | .quad 0\r | |
40 | \r | |
41 | SmmStartup:\r | |
42 | .byte 0x66,0xb8\r | |
43 | ASM_PFX(gSmmCr3): .space 4\r | |
44 | movl %eax, %cr3\r | |
45 | .byte 0x67,0x66\r | |
46 | lgdt %cs:(ASM_PFX(gcSmiInitGdtr) - SmmStartup)(%ebp)\r | |
47 | .byte 0x66,0xb8\r | |
48 | ASM_PFX(gSmmCr4): .space 4\r | |
49 | movl %eax, %cr4\r | |
50 | .byte 0x66,0xb8\r | |
51 | ASM_PFX(gSmmCr0): .space 4\r | |
52 | .byte 0xbf, PROTECT_MODE_DS, 0 # mov di, PROTECT_MODE_DS\r | |
53 | movl %eax, %cr0\r | |
54 | .byte 0x66,0xea # jmp far [ptr48]\r | |
55 | ASM_PFX(gSmmJmpAddr): .long Start32bit\r | |
56 | .word PROTECT_MODE_CS\r | |
57 | Start32bit:\r | |
58 | movl %edi,%ds\r | |
59 | movl %edi,%es\r | |
60 | movl %edi,%fs\r | |
61 | movl %edi,%gs\r | |
62 | movl %edi,%ss\r | |
63 | .byte 0xbc # mov esp, imm32\r | |
64 | ASM_PFX(gSmmInitStack): .space 4\r | |
65 | call ASM_PFX(SmmInitHandler)\r | |
66 | rsm\r | |
67 | \r | |
68 | ASM_PFX(gcSmmInitTemplate):\r | |
69 | \r | |
70 | _SmmInitTemplate:\r | |
71 | .byte 0x66\r | |
72 | movl $SmmStartup, %ebp\r | |
73 | .byte 0x66, 0x81, 0xed, 0, 0, 3, 0 # sub ebp, 0x30000\r | |
74 | jmp *%bp # jmp ebp actually\r | |
75 | \r | |
76 | ASM_PFX(gcSmmInitSize): .word . - ASM_PFX(gcSmmInitTemplate)\r | |
77 | \r | |
78 | \r | |
79 | ASM_PFX(SmmRelocationSemaphoreComplete):\r | |
80 | pushl %eax\r | |
81 | movl ASM_PFX(mRebasedFlag), %eax\r | |
82 | movb $1, (%eax)\r | |
83 | popl %eax\r | |
84 | jmp *ASM_PFX(mSmmRelocationOriginalAddress)\r |