projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| be46cd5f | 1 | ;; @file\r |
| 2 | ; This is the assembly code for transferring to control to OS S3 waking vector\r | |
| 3 | ; for IA32 platform\r | |
| 4 | ;\r | |
| 5 | ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r | |
| 6 | ;\r | |
| 7 | ; This program and the accompanying materials\r | |
| 8 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
| 9 | ; which accompanies this distribution. The full text of the license may be found at\r | |
| 10 | ; http://opensource.org/licenses/bsd-license.php\r | |
| 11 | ;\r | |
| 12 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 13 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 14 | ;\r | |
| 15 | ;;\r | |
| 16 | .586P\r | |
| 17 | .model flat,C\r | |
| 18 | .code\r | |
| 19 | \r | |
| 5262695c JJ |
20 | PUBLIC AsmFixAddress16\r |
| 21 | PUBLIC AsmJmpAddr32\r | |
| be46cd5f | 22 | \r |
| 23 | ;-----------------------------------------\r | |
| 24 | ;VOID\r | |
| 25 | ;AsmTransferControl (\r | |
| 26 | ; IN UINT32 S3WakingVector,\r | |
| 27 | ; IN UINT32 AcpiLowMemoryBase\r | |
| 28 | ; );\r | |
| 29 | ;-----------------------------------------\r | |
| 30 | \r | |
| 31 | AsmTransferControl PROC\r | |
| 32 | ; S3WakingVector :DWORD\r | |
| 33 | ; AcpiLowMemoryBase :DWORD\r | |
| 34 | push ebp\r | |
| 35 | mov ebp, esp \r | |
| 36 | lea eax, @F\r | |
| 37 | push 28h ; CS\r | |
| 38 | push eax\r | |
| 39 | mov ecx, [ebp + 8]\r | |
| 40 | shrd ebx, ecx, 20\r | |
| 41 | and ecx, 0fh \r | |
| 42 | mov bx, cx \r | |
| a2308456 | 43 | mov [@jmp_addr], ebx\r |
| be46cd5f | 44 | retf\r |
| 45 | @@:\r | |
| 46 | DB 0b8h, 30h, 0 ; mov ax, 30h as selector\r | |
| 47 | mov ds, ax\r | |
| 48 | mov es, ax\r | |
| 49 | mov fs, ax\r | |
| 50 | mov gs, ax\r | |
| 51 | mov ss, ax\r | |
| 52 | mov eax, cr0 ; Get control register 0 \r | |
| 53 | DB 66h\r | |
| 54 | DB 83h, 0e0h, 0feh ; and eax, 0fffffffeh ; Clear PE bit (bit #0)\r | |
| 55 | DB 0fh, 22h, 0c0h ; mov cr0, eax ; Activate real mode\r | |
| 56 | DB 0eah ; jmp far @jmp_addr\r | |
| 57 | @jmp_addr DD ?\r | |
| 58 | \r | |
| 59 | AsmTransferControl ENDP\r | |
| 60 | \r | |
| 61 | AsmTransferControl32 PROC\r | |
| 62 | jmp AsmTransferControl\r | |
| 63 | AsmTransferControl32 ENDP\r | |
| 64 | \r | |
| 65 | ; dummy\r | |
| 66 | AsmTransferControl16 PROC\r | |
| 67 | AsmFixAddress16 DD ?\r | |
| 68 | AsmJmpAddr32 DD ?\r | |
| 69 | AsmTransferControl16 ENDP\r | |
| 70 | \r | |
| 71 | END |