ArmPlatformPkg/ArmPlatformGlobalVariableLib: Added new function ArmPlatformGetGlobalVariableAddress()

This function returns the address of a Global Variable in the Global Variable Region.

Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13246 6f19259b-4bc3-4df7-8a09-765794883524

ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/Sec/SecArmPlatformGlobalVariableLib.c

@@ -65,3 +65,17 @@ ArmPlatformSetGlobalVariable (
   }
 }
 
+VOID*
+ArmPlatformGetGlobalVariableAddress (
+  IN  UINTN     VariableOffset
+  )
+{
+  UINTN  GlobalVariableBase;
+
+  // Ensure the Global Variable Size have been initialized
+  ASSERT (VariableOffset < PcdGet32 (PcdSecGlobalVariableSize));
+
+  GlobalVariableBase = PcdGet32 (PcdCPUCoresSecStackBase) + PcdGet32 (PcdCPUCoreSecPrimaryStackSize) - PcdGet32 (PcdSecGlobalVariableSize);
+
+  return (VOID*)(GlobalVariableBase + VariableOffset);
+}