Add initial version of Open Virtual Machine Firmware (OVMF) platform.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8398 6f19259b-4bc3-4df7-8a09-765794883524

OvmfPkg/Sec/Ia32/SecEntry.asm

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+      TITLE   SecEntry.asm
+;------------------------------------------------------------------------------
+;*
+;*   Copyright 2006 - 2009, Intel Corporation
+;*   All rights reserved. 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.
+;*
+;*    CpuAsm.asm
+;*
+;*   Abstract:
+;*
+;------------------------------------------------------------------------------
+
+#include "SecMain.h"
+
+    .686
+    .model  flat,C
+    .code
+
+EXTERN SecCoreStartupWithStack:PROC
+
+;
+;  SecCore Entry Point
+;
+;  Processor is in flat protected mode
+;
+;  @param  ESI  Pointer to SEC Core Entry Point (this function)
+;  @param  EDI  Pointer to PEI Core Entry Point
+;  @param  EBP  Pointer to the start of the Boot Firmware Volume
+;
+;  @return None
+;
+;
+_ModuleEntryPoint PROC PUBLIC
+
+    ;
+    ; Load temporary stack top at very low memory.  The C code
+    ; can reload to a better address.
+    ;
+    mov     eax, INITIAL_TOP_OF_STACK
+    mov     esp, eax
+    nop
+
+    ;
+    ; Call into C code
+    ;
+    push    eax
+    push    edi
+    push    esi
+    push    ebp
+    call    SecCoreStartupWithStack
+
+_ModuleEntryPoint ENDP
+
+END