new file mode 100644
--- /dev/null
+++ b/packages/hal/mn10300/stb/current/include/plf_stub.h
@@ -0,0 +1,86 @@
+#ifndef CYGONCE_HAL_PLF_STUB_H
+#define CYGONCE_HAL_PLF_STUB_H
+
+//=============================================================================
+//
+//      plf_stub.h
+//
+//      Platform header for GDB stub support.
+//
+//=============================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//=============================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   jskov
+// Contributors:jskov
+// Date:        1999-02-12
+// Purpose:     Platform HAL stub support for AM33/STB boards.
+// Usage:       #include <cyg/hal/plf_stub.h>
+//              
+//####DESCRIPTIONEND####
+//
+//=============================================================================
+
+#include <pkgconf/hal.h>
+#include <pkgconf/hal_mn10300_am33_stb.h>
+
+#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+
+#include <cyg/infra/cyg_type.h>         // CYG_UNUSED_PARAM
+
+#include <cyg/hal/mn10300_stub.h>       // architecture stub support
+
+//----------------------------------------------------------------------------
+// Define serial stuff.
+extern void hal_stb_init_serial( void );
+extern int  hal_stb_get_char( void );
+extern void hal_stb_put_char( int c );
+extern int  hal_stb_interruptible(int state);
+extern void hal_stb_init_break_irq( void );
+
+#define HAL_STUB_PLATFORM_INIT_SERIAL()       hal_stb_init_serial()
+#define HAL_STUB_PLATFORM_GET_CHAR()          hal_stb_get_char()
+#define HAL_STUB_PLATFORM_PUT_CHAR(c)         hal_stb_put_char((c))
+#define HAL_STUB_PLATFORM_SET_BAUD_RATE(baud) CYG_UNUSED_PARAM(int, (baud))
+#define HAL_STUB_PLATFORM_INTERRUPTIBLE       (&hal_stb_interruptible)
+#define HAL_STUB_PLATFORM_INIT_BREAK_IRQ()    hal_stb_init_break_irq()
+
+//----------------------------------------------------------------------------
+// Stub initializer.
+
+externC void hal_stb_platform_init(void);
+
+#define HAL_STUB_PLATFORM_INIT()                hal_stb_platform_init()
+
+//----------------------------------------------------------------------------
+// Reset.
+#define HAL_STUB_PLATFORM_RESET()             CYG_EMPTY_STATEMENT
+
+#endif // ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+
+//-----------------------------------------------------------------------------
+#endif // CYGONCE_HAL_PLF_STUB_H
+// End of plf_stub.h