1 ;; @file 2 ; This is the assembly code for transferring to control to OS S3 waking vector 3 ; for IA32 platform 4 ; 5 ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> 6 ; 7 ; This program and the accompanying materials 8 ; are licensed and made available under the terms and conditions of the BSD License 9 ; which accompanies this distribution. The full text of the license may be found at 10 ; http://opensource.org/licenses/bsd-license.php 11 ; 12 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 ; 15 ;; 16 SECTION .text 17 18 global ASM_PFX(AsmFixAddress16) 19 global ASM_PFX(AsmJmpAddr32) 20 21 ;----------------------------------------- 22 ;VOID 23 ;AsmTransferControl ( 24 ; IN UINT32 S3WakingVector, 25 ; IN UINT32 AcpiLowMemoryBase 26 ; ); 27 ;----------------------------------------- 28 29 global ASM_PFX(AsmTransferControl) 30 ASM_PFX(AsmTransferControl): 31 ; S3WakingVector :DWORD 32 ; AcpiLowMemoryBase :DWORD 33 push ebp 34 mov ebp, esp 35 lea eax, [.0] 36 push 0x28 ; CS 37 push eax 38 mov ecx, [ebp + 8] 39 shrd ebx, ecx, 20 40 and ecx, 0xf 41 mov bx, cx 42 mov [@jmp_addr + 1], ebx 43 retf 44 45 BITS 16 46 .0: 47 mov ax, 0x30 48 o32 mov ds, eax 49 o32 mov es, eax 50 o32 mov fs, eax 51 o32 mov gs, eax 52 o32 mov ss, eax 53 mov eax, cr0 ; Get control register 0 54 and eax, 0x0fffffffe ; Clear PE bit (bit #0) 55 mov cr0, eax ; Activate real mode 56 @jmp_addr: 57 jmp 0x0:0x0 58 59 global ASM_PFX(AsmTransferControl32) 60 ASM_PFX(AsmTransferControl32): 61 jmp ASM_PFX(AsmTransferControl) 62 63 ; dummy 64 global ASM_PFX(AsmTransferControl16) 65 ASM_PFX(AsmTransferControl16): 66 ASM_PFX(AsmFixAddress16): DD 0 67 ASM_PFX(AsmJmpAddr32): DD 0 68 69
