new file mode 100644
--- /dev/null
+++ b/packages/hal/powerpc/csb281/current/include/plf_stub.h
@@ -0,0 +1,88 @@
+#ifndef CYGONCE_HAL_PLF_STUB_H
+#define CYGONCE_HAL_PLF_STUB_H
+
+//=============================================================================
+//
+//      plf_stub.h
+//
+//      Platform header for GDB stub support.
+//
+//=============================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+// Copyright (C) 2002 Gary Thomas
+//
+// eCos is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 2 or (at your option) any later version.
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+//
+// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
+// at http://sources.redhat.com/ecos/ecos-license/
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
+//=============================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   jskov
+// Contributors:jskov, gthomas
+// Date:        1999-02-12
+// Purpose:     Platform HAL stub support for Cogent CSB281 PowerPC/8245 board.
+// Usage:       #include <cyg/hal/plf_stub.h>
+//              
+//####DESCRIPTIONEND####
+//
+//=============================================================================
+
+#include <pkgconf/hal.h>
+
+#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+
+#include <cyg/infra/cyg_type.h>         // CYG_UNUSED_PARAM
+
+#include <cyg/hal/ppc_stub.h>           // architecture stub support
+
+//----------------------------------------------------------------------------
+// Define some platform specific communication details. This is mostly
+// handled by hal_if now, but we need to make sure the comms tables are
+// properly initialized.
+
+externC void cyg_hal_plf_comms_init(void);
+
+#define HAL_STUB_PLATFORM_INIT_SERIAL()       cyg_hal_plf_comms_init()
+
+#define HAL_STUB_PLATFORM_SET_BAUD_RATE(baud) CYG_UNUSED_PARAM(int, (baud))
+#define HAL_STUB_PLATFORM_INIT_BREAK_IRQ()    CYG_EMPTY_STATEMENT
+#define HAL_STUB_PLATFORM_INTERRUPTIBLE       0
+
+//----------------------------------------------------------------------------
+// Stub initializer.
+#ifdef CYG_HAL_STARTUP_ROM
+# define HAL_STUB_PLATFORM_INIT()
+// to distinguish eCos stub ROM ready state from either RedBoot or app.
+#endif
+
+#endif // ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+//-----------------------------------------------------------------------------
+#endif // CYGONCE_HAL_PLF_STUB_H
+// End of plf_stub.h