projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 0ed65cc2 JJ |
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 | SECTION .text\r | |
| 17 | \r | |
| 18 | global ASM_PFX(AsmFixAddress16)\r | |
| 19 | global ASM_PFX(AsmJmpAddr32)\r | |
| 20 | \r | |
| 21 | ;-----------------------------------------\r | |
| 22 | ;VOID\r | |
| 23 | ;AsmTransferControl (\r | |
| 24 | ; IN UINT32 S3WakingVector,\r | |
| 25 | ; IN UINT32 AcpiLowMemoryBase\r | |
| 26 | ; );\r | |
| 27 | ;-----------------------------------------\r | |
| 28 | \r | |
| 29 | global ASM_PFX(AsmTransferControl)\r | |
| 30 | ASM_PFX(AsmTransferControl):\r | |
| 31 | ; S3WakingVector :DWORD\r | |
| 32 | ; AcpiLowMemoryBase :DWORD\r | |
| 33 | push ebp\r | |
| 34 | mov ebp, esp\r | |
| 35 | lea eax, [.0]\r | |
| 36 | push 0x28 ; CS\r | |
| 37 | push eax\r | |
| 38 | mov ecx, [ebp + 8]\r | |
| 39 | shrd ebx, ecx, 20\r | |
| 40 | and ecx, 0xf\r | |
| 41 | mov bx, cx\r | |
| 42 | mov [@jmp_addr], ebx\r | |
| 43 | retf\r | |
| 44 | .0:\r | |
| 45 | DB 0xb8, 0x30, 0 ; mov ax, 30h as selector\r | |
| 46 | mov ds, ax\r | |
| 47 | mov es, ax\r | |
| 48 | mov fs, ax\r | |
| 49 | mov gs, ax\r | |
| 50 | mov ss, ax\r | |
| 51 | mov eax, cr0 ; Get control register 0\r | |
| 52 | DB 0x66\r | |
| 53 | DB 0x83, 0xe0, 0xfe ; and eax, 0fffffffeh ; Clear PE bit (bit #0)\r | |
| 54 | DB 0xf, 0x22, 0xc0 ; mov cr0, eax ; Activate real mode\r | |
| 55 | DB 0xea ; jmp far @jmp_addr\r | |
| 56 | @jmp_addr: DD 0\r | |
| 57 | \r | |
| 58 | global ASM_PFX(AsmTransferControl32)\r | |
| 59 | ASM_PFX(AsmTransferControl32):\r | |
| 60 | jmp ASM_PFX(AsmTransferControl)\r | |
| 61 | \r | |
| 62 | ; dummy\r | |
| 63 | global ASM_PFX(AsmTransferControl16)\r | |
| 64 | ASM_PFX(AsmTransferControl16):\r | |
| 65 | ASM_PFX(AsmFixAddress16): DD 0\r | |
| 66 | ASM_PFX(AsmJmpAddr32): DD 0\r | |
| 67 | \r |