1 files changed, 53 insertions, 0 deletions
diff --git a/ArmEbPkg/Sec/ModuleEntryPoint.asm b/ArmEbPkg/Sec/ModuleEntryPoint.asm
new file mode 100755
index 0000000000..ef245242a1
--- /dev/null
+++ b/ArmEbPkg/Sec/ModuleEntryPoint.asm
@@ -0,0 +1,53 @@
+//------------------------------------------------------------------------------ 
+//
+// Copyright (c) 2008-2009 Apple Inc. All rights reserved.
+//
+// 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.
+//
+//------------------------------------------------------------------------------
+
+#include <AsmMacroIoLib.h>
+#include <Library/PcdLib.h>
+#include <AutoGen.h>
+  INCLUDE AsmMacroIoLib.inc
+  
+  IMPORT  CEntryPoint
+  EXPORT  _ModuleEntryPoint
+        
+  PRESERVE8
+  AREA    ModuleEntryPoint, CODE, READONLY
+  
+
+_ModuleEntryPoint
+ 
+
+  //
+  // Set stack based on PCD values. Need to do it this way to make C code work 
+  // when it runs from FLASH. 
+  //  
+  LoadConstantToReg (FixedPcdGet32(PcdPrePiStackBase) ,r2)    /* stack base arg2  */
+  LoadConstantToReg (FixedPcdGet32(PcdPrePiStackSize) ,r3)    /* stack size arg3  */
+  add     r4, r2, r3
+
+  //Enter SVC mode and set up SVC stack pointer
+  mov     r0,#0x13|0x80|0x40
+  msr     CPSR_c,r0
+  mov     r13,r4
+
+  // Call C entry point
+  LoadConstantToReg (FixedPcdGet32(PcdMemorySize) ,r1)    /* memory size arg1          */
+  LoadConstantToReg (FixedPcdGet32(PcdMemoryBase) ,r0)    /* memory size arg0         */
+  blx     CEntryPoint       /* Assume C code is thumb    */
+
+ShouldNeverGetHere
+  /* _CEntryPoint should never return */
+  b       ShouldNeverGetHere
+  
+  END
+