new file mode 100644
--- /dev/null
+++ b/packages/hal/powerpc/cogent/current/include/plf_stub.h
@@ -0,0 +1,98 @@
+#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 Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// 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 Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998, 1999 Cygnus Solutions.  
+// All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//=============================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   jskov
+// Contributors:jskov
+// Date:        1999-02-12
+// Purpose:     Platform HAL stub support for PowerPC/Cogent boards.
+// Usage:       #include <cyg/hal/plf_stub.h>
+//              
+//####DESCRIPTIONEND####
+//
+//=============================================================================
+
+#include <pkgconf/system.h>
+#include <pkgconf/hal.h>
+#include <pkgconf/hal_powerpc_cogent.h>
+
+#ifdef CYGPKG_IO_SERIAL
+#include <pkgconf/io_serial.h>
+#endif
+
+#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+
+#include <cyg/infra/cyg_type.h>         // CYG_UNUSED_PARAM, externC
+
+#include <cyg/hal/ppc_stub.h>           // architecture stub support
+
+//----------------------------------------------------------------------------
+// Define serial stuff.
+externC void hal_cma_stub_init_serial( void );
+externC int  hal_cma_stub_get_char( void );
+externC void hal_cma_stub_put_char( int c );
+externC int  hal_cma_stub_interruptible( int state );
+externC void hal_cma_stub_init_break_irq( void );
+
+// Only define init function if no serial driver is used on the same port.
+#if ((CYGHWR_HAL_POWERPC_COGENT_GDB_PORT == 0                   \
+      && defined(CYGPKG_IO_SERIAL_POWERPC_COGENT_SERIAL_A)) ||  \
+     (CYGHWR_HAL_POWERPC_COGENT_GDB_PORT == 1                   \
+      && defined(CYGPKG_IO_SERIAL_POWERPC_COGENT_SERIAL_B)))
+#define HAL_STUB_PLATFORM_INIT_SERIAL()       CYG_EMPTY_STATEMENT
+#else
+#define HAL_STUB_PLATFORM_INIT_SERIAL()       hal_cma_stub_init_serial()
+#endif
+
+#define HAL_STUB_PLATFORM_GET_CHAR()          hal_cma_stub_get_char()
+#define HAL_STUB_PLATFORM_PUT_CHAR(c)         hal_cma_stub_put_char((c))
+#define HAL_STUB_PLATFORM_SET_BAUD_RATE(baud) CYG_UNUSED_PARAM(int, (baud))
+#define HAL_STUB_PLATFORM_INTERRUPTIBLE       (&hal_cma_stub_interruptible)
+#define HAL_STUB_PLATFORM_INIT_BREAK_IRQ()    hal_cma_stub_init_break_irq()
+
+//----------------------------------------------------------------------------
+// Stub initializer.
+extern void diag_init (void);
+#define HAL_STUB_PLATFORM_STUBS_INIT()        diag_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