projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 7947da3c MK |
1 | ;------------------------------------------------------------------------------ ;\r |
| 2 | ; Copyright (c) 2009 - 2015, 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.Asm\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 | .686p\r | |
| 22 | .xmm\r | |
| 23 | .model flat,C\r | |
| 24 | \r | |
| 25 | SmmInitHandler PROTO C\r | |
| 26 | \r | |
| 27 | EXTERNDEF C gSmmCr0:DWORD\r | |
| 28 | EXTERNDEF C gSmmCr3:DWORD\r | |
| 29 | EXTERNDEF C gSmmCr4:DWORD\r | |
| 30 | EXTERNDEF C gcSmmInitTemplate:BYTE\r | |
| 31 | EXTERNDEF C gcSmmInitSize:WORD\r | |
| 32 | EXTERNDEF C gSmmJmpAddr:QWORD\r | |
| 33 | EXTERNDEF C mRebasedFlag:PTR BYTE\r | |
| 34 | EXTERNDEF C mSmmRelocationOriginalAddress:DWORD\r | |
| 35 | EXTERNDEF C gSmmInitStack:DWORD\r | |
| 36 | EXTERNDEF C gcSmiInitGdtr:FWORD\r | |
| 37 | \r | |
| 38 | PROTECT_MODE_CS EQU 08h\r | |
| 39 | PROTECT_MODE_DS EQU 20h\r | |
| 40 | \r | |
| 41 | .code\r | |
| 42 | \r | |
| 43 | gcSmiInitGdtr LABEL FWORD\r | |
| 44 | DW 0\r | |
| 45 | DQ 0\r | |
| 46 | \r | |
| 47 | SmmStartup PROC\r | |
| 48 | DB 66h, 0b8h\r | |
| 49 | gSmmCr3 DD ?\r | |
| 50 | mov cr3, eax\r | |
| 51 | DB 67h, 66h\r | |
| 52 | lgdt fword ptr cs:[ebp + (offset gcSmiInitGdtr - SmmStartup)]\r | |
| 53 | DB 66h, 0b8h\r | |
| 54 | gSmmCr4 DD ?\r | |
| 55 | mov cr4, eax\r | |
| 56 | DB 66h, 0b8h\r | |
| 57 | gSmmCr0 DD ?\r | |
| 58 | DB 0bfh, PROTECT_MODE_DS, 0 ; mov di, PROTECT_MODE_DS\r | |
| 59 | mov cr0, eax\r | |
| 60 | DB 66h, 0eah ; jmp far [ptr48]\r | |
| 61 | gSmmJmpAddr LABEL QWORD\r | |
| 62 | DD @32bit\r | |
| 63 | DW PROTECT_MODE_CS\r | |
| 64 | @32bit:\r | |
| 65 | mov ds, edi\r | |
| 66 | mov es, edi\r | |
| 67 | mov fs, edi\r | |
| 68 | mov gs, edi\r | |
| 69 | mov ss, edi\r | |
| 70 | DB 0bch ; mov esp, imm32\r | |
| 71 | gSmmInitStack DD ?\r | |
| 72 | call SmmInitHandler\r | |
| 73 | rsm\r | |
| 74 | SmmStartup ENDP\r | |
| 75 | \r | |
| 76 | gcSmmInitTemplate LABEL BYTE\r | |
| 77 | \r | |
| 78 | _SmmInitTemplate PROC\r | |
| 79 | DB 66h\r | |
| 80 | mov ebp, SmmStartup\r | |
| 81 | DB 66h, 81h, 0edh, 00h, 00h, 03h, 00 ; sub ebp, 30000h\r | |
| 82 | jmp bp ; jmp ebp actually\r | |
| 83 | _SmmInitTemplate ENDP\r | |
| 84 | \r | |
| 85 | gcSmmInitSize DW $ - gcSmmInitTemplate\r | |
| 86 | \r | |
| 87 | SmmRelocationSemaphoreComplete PROC\r | |
| 88 | push eax\r | |
| 89 | mov eax, mRebasedFlag\r | |
| 90 | mov byte ptr [eax], 1\r | |
| 91 | pop eax\r | |
| 92 | jmp [mSmmRelocationOriginalAddress]\r | |
| 93 | SmmRelocationSemaphoreComplete ENDP\r | |
| 94 | END\r |