1 files changed, 67 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/S3Asm.nasm b/MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/S3Asm.nasm
new file mode 100644
index 000000000..3687e6440
--- /dev/null
+++ b/MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/IA32/S3Asm.nasm
@@ -0,0 +1,67 @@
+;; @file
+;   This is the assembly code for transferring to control to OS S3 waking vector
+;   for IA32 platform
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+;
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+;;
+    SECTION .text
+
+global ASM_PFX(AsmFixAddress16)
+global ASM_PFX(AsmJmpAddr32)
+
+;-----------------------------------------
+;VOID
+;AsmTransferControl (
+;  IN   UINT32           S3WakingVector,
+;  IN   UINT32           AcpiLowMemoryBase
+;  );
+;-----------------------------------------
+
+global ASM_PFX(AsmTransferControl)
+ASM_PFX(AsmTransferControl):
+    ; S3WakingVector    :DWORD
+    ; AcpiLowMemoryBase :DWORD
+    push  ebp
+    mov   ebp, esp
+    lea   eax, [.0]
+    push  0x28               ; CS
+    push  eax
+    mov   ecx, [ebp + 8]
+    shrd  ebx, ecx, 20
+    and   ecx, 0xf
+    mov   bx, cx
+    mov   [@jmp_addr], ebx
+    retf
+.0:
+    DB    0xb8, 0x30, 0      ; mov ax, 30h as selector
+    mov   ds, ax
+    mov   es, ax
+    mov   fs, ax
+    mov   gs, ax
+    mov   ss, ax
+    mov   eax, cr0          ; Get control register 0
+    DB    0x66
+    DB    0x83, 0xe0, 0xfe   ; and    eax, 0fffffffeh  ; Clear PE bit (bit #0)
+    DB    0xf, 0x22, 0xc0    ; mov    cr0, eax         ; Activate real mode
+    DB    0xea              ; jmp far @jmp_addr
+@jmp_addr: DD 0
+
+global ASM_PFX(AsmTransferControl32)
+ASM_PFX(AsmTransferControl32):
+  jmp ASM_PFX(AsmTransferControl)
+
+; dummy
+global ASM_PFX(AsmTransferControl16)
+ASM_PFX(AsmTransferControl16):
+ASM_PFX(AsmFixAddress16): DD 0
+ASM_PFX(AsmJmpAddr32): DD 0
+