new file mode 100644
--- /dev/null
+++ b/packages/hal/calmrisc32/ceb/current/include/plf_io.h
@@ -0,0 +1,123 @@
+#ifndef CYGONCE_PLF_IO_H
+#define CYGONCE_PLF_IO_H
+
+//=============================================================================
+//
+//      plf_io.h
+//
+//      Platform specific IO support
+//
+//=============================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+//
+// 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):    msalter
+// Contributors: msalter
+// Date:         2001-02-12
+// Purpose:      CalmRISC32 platform IO support
+// Description: 
+// Usage:        #include <cyg/hal/plf_io.h>
+//
+//####DESCRIPTIONEND####
+//
+//=============================================================================
+
+#include <pkgconf/hal.h>
+#include <cyg/hal/hal_misc.h>
+
+// coprocessor regs
+#define HAL_COP_SR_RBR 0x1c
+#define HAL_COP_SR_TBR 0x1d
+#define HAL_COP_TBR    0x1e
+#define HAL_COP_RBR    0x1f
+
+#ifndef __ASSEMBLER__
+
+static inline void cyg_hal_plf_write_sr_rbr(int val)
+{
+    asm volatile ("cld fr28,%0\n" : : "r"(val));
+}
+
+static inline void cyg_hal_plf_write_sr_tbr(int val)
+{
+    asm volatile ("cld fr29,%0\n" : : "r"(val));
+}
+
+static inline void cyg_hal_plf_write_tbr(int val)
+{
+    asm volatile ("cld fr30,%0\n" : : "r"(val));
+}
+
+static inline void cyg_hal_plf_write_rbr(int val)
+{
+    asm volatile ("cld fr31,%0\n" : : "r"(val));
+}
+
+static inline int cyg_hal_plf_read_sr_rbr(void)
+{
+    int val;
+
+    asm volatile ("cld %0,fr28\n" : "=r"(val) : );
+    return val;
+}
+
+static inline int cyg_hal_plf_read_sr_tbr(void)
+{
+    int val;
+
+    asm volatile ("cld %0,fr29\n" : "=r"(val) : );
+    return val;
+}
+
+static inline int cyg_hal_plf_read_tbr(void)
+{
+    int val;
+
+    asm volatile ("cld %0,fr30\n" : "=r"(val) : );
+    return val;
+}
+
+static inline int cyg_hal_plf_read_rbr(void)
+{
+    int val;
+
+    asm volatile ("cld %0,fr31\n" : "=r"(val) : );
+    return val;
+}
+#endif
+
+//-----------------------------------------------------------------------------
+// end of plf_io.h
+#endif // CYGONCE_PLF_IO_H