new file mode 100644
--- /dev/null
+++ b/packages/hal/mn10300/stb/current/src/plf_misc.c
@@ -0,0 +1,203 @@
+//==========================================================================
+//
+//      plf_misc.c
+//
+//      HAL platform miscellaneous functions
+//
+//==========================================================================
+//####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):    nickg
+// Contributors: nickg, jlarmour
+// Date:         1999-01-21
+// Purpose:      HAL miscellaneous functions
+// Description:  This file contains miscellaneous functions provided by the
+//               HAL.
+//
+//####DESCRIPTIONEND####
+//
+//========================================================================*/
+
+#include <pkgconf/hal.h>
+
+#include <cyg/infra/cyg_type.h>         // Base types
+#include <cyg/infra/cyg_trac.h>         // tracing macros
+#include <cyg/infra/cyg_ass.h>          // assertion macros
+
+#include <cyg/hal/hal_arch.h>           // architectural definitions
+
+#include <cyg/hal/hal_intr.h>           // Interrupt handling
+
+#include <cyg/hal/hal_cache.h>          // Cache handling
+
+/*------------------------------------------------------------------------*/
+
+void hal_platform_init(void)
+{
+#if defined(CYG_HAL_STARTUP_ROM)
+    // Note that the hardware seems to come up with the
+    // caches containing random data. Hence they must be
+    // invalidated before being enabled.
+    // However, we only do this if we are in ROM. If we are
+    // in RAM, then we leave the caches in the state chosen
+    // by the ROM monitor. If we enable them when the monitor
+    // is not expecting it, we can end up breaking things if the
+    // monitor is not doing cache flushes.
+
+    HAL_ICACHE_INVALIDATE_ALL();    
+    HAL_ICACHE_ENABLE();
+    HAL_DCACHE_INVALIDATE_ALL();
+    HAL_DCACHE_ENABLE();
+#endif
+    
+#if defined(CYGPKG_KERNEL)                      && \
+    defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT)   && \
+    defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)
+    {
+        extern CYG_ADDRESS hal_virtual_vector_table[32];
+        extern void patch_dbg_syscalls(void * vector);
+        patch_dbg_syscalls( (void *)(&hal_virtual_vector_table[0]) );
+    }
+#endif    
+#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
+    {
+        static void hal_ctrlc_isr_init(void);
+        hal_ctrlc_isr_init();
+    }
+#endif    
+}
+
+/*------------------------------------------------------------------------*/
+/* Functions to support the detection and execution of a user provoked    */
+/* program break. These are usually called from interrupt routines.       */
+
+cyg_bool cyg_hal_is_break(char *buf, int size)
+{
+    while( size )
+        if( buf[--size] == 0x03 ) return true;
+
+    return false;
+}
+
+void cyg_hal_user_break( CYG_ADDRWORD *regs )
+{
+#if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)
+
+        {
+            extern CYG_ADDRESS hal_virtual_vector_table[64];        
+            typedef void install_bpt_fn(void *pc);
+            CYG_WORD32 retpc = ((CYG_WORD32 *)(&regs))[-1];
+            CYG_WORD32 pc;
+            HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
+            install_bpt_fn *ibp = (install_bpt_fn *)hal_virtual_vector_table[35];
+
+            if( regs == NULL ) pc = retpc;
+            else pc = sreg->pc;
+
+            if( ibp != NULL ) ibp((void *)pc);
+        }
+    
+#elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
+
+        {
+            extern void breakpoint(void);
+            breakpoint();
+        }
+    
+#else
+
+        HAL_BREAKPOINT(breakinst);
+
+#endif
+}
+
+/*------------------------------------------------------------------------*/
+/* Control C ISR support                                                  */
+
+#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
+
+#if CYGHWR_HAL_MN10300_AM33_STB_GDB_PORT == 0
+
+// We use serial0 on AM33
+#define SERIAL_CR       ((volatile cyg_uint16 *)0xd4002000)
+#define SERIAL_ICR      ((volatile cyg_uint8 *) 0xd4002004)
+#define SERIAL_TXR      ((volatile cyg_uint8 *) 0xd4002008)
+#define SERIAL_RXR      ((volatile cyg_uint8 *) 0xd4002009)
+#define SERIAL_SR       ((volatile cyg_uint16 *)0xd400200c)
+
+// Timer 1 provided baud rate divisor
+#define TIMER_MD       ((volatile cyg_uint8 *)0xd4003000)
+#define TIMER_BR       ((volatile cyg_uint8 *)0xd4003010)
+#define TIMER_CR       ((volatile cyg_uint8 *)0xd4003020)
+
+#define SIO_LSTAT_TRDY  0x20
+#define SIO_LSTAT_RRDY  0x10
+
+#else
+
+#error Unsupported GDB port
+
+#endif
+
+struct Hal_SavedRegisters *hal_saved_interrupt_state;
+
+static void hal_ctrlc_isr_init(void)
+{
+//    cyg_uint16 cr;
+
+//    HAL_READ_UINT16( SERIAL_CR, cr );
+//    cr |= LCR_RXE;
+//    HAL_WRITE_UINT16( SERIAL_CR, cr );
+    HAL_INTERRUPT_SET_LEVEL( CYGHWR_HAL_GDB_PORT_VECTOR, 4 );
+    HAL_INTERRUPT_UNMASK( CYGHWR_HAL_GDB_PORT_VECTOR ); 
+}
+
+cyg_uint32 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
+{
+    char c;
+    cyg_uint16 sr;
+    
+    HAL_INTERRUPT_ACKNOWLEDGE( CYGHWR_HAL_GDB_PORT_VECTOR ); 
+
+    HAL_READ_UINT16( SERIAL_SR, sr );
+
+    if( sr & SIO_LSTAT_RRDY )
+    {
+        HAL_READ_UINT8( SERIAL_RXR, c);
+
+        if( cyg_hal_is_break( &c , 1 ) )
+            cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
+
+        
+    }
+    return 1;
+}
+
+#endif
+
+/*------------------------------------------------------------------------*/
+/* End of plf_misc.c                                                      */