new file mode 100644
--- /dev/null
+++ b/packages/hal/arm/pid/current/include/hal_diag.h
@@ -0,0 +1,67 @@
+#ifndef CYGONCE_HAL_DIAG_H
+#define CYGONCE_HAL_DIAG_H
+
+/*=============================================================================
+//
+//      hal_diag.h
+//
+//      HAL Support for Kernel Diagnostic Routines
+//
+//=============================================================================
+//####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):   nickg, gthomas
+// Contributors:        nickg, gthomas
+// Date:        1998-09-11
+// Purpose:     HAL Support for Kernel Diagnostic Routines
+// Description: Diagnostic routines for use during kernel development.
+// Usage:       #include <cyg/hal/hal_diag.h>
+//
+//####DESCRIPTIONEND####
+//
+//===========================================================================*/
+
+#include <pkgconf/hal.h>
+
+#include <cyg/infra/cyg_type.h>
+
+/*---------------------------------------------------------------------------*/
+/* functions implemented in hal_diag.c                                       */
+
+externC void hal_diag_init(void);
+externC void hal_diag_write_char(char c);
+externC void hal_diag_read_char(char *c);
+
+/*---------------------------------------------------------------------------*/
+
+#define HAL_DIAG_INIT() hal_diag_init()
+
+#define HAL_DIAG_WRITE_CHAR(_c_) hal_diag_write_char(_c_)
+
+#define HAL_DIAG_READ_CHAR(_c_) hal_diag_read_char(&_c_)
+
+/*---------------------------------------------------------------------------*/
+/* end of hal_diag.h                                                         */
+#endif /* CYGONCE_HAL_DIAG_H */