new file mode 100644
--- /dev/null
+++ b/packages/devs/flash/arm/assabet/current/src/flash_lock_block.c
@@ -0,0 +1,87 @@
+//==========================================================================
+//
+//      flash_lock_block.c
+//
+//      Flash programming
+//
+//==========================================================================
+//####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):    gthomas
+// Contributors: gthomas
+// Date:         2000-09-10
+// Purpose:      
+// Description:  
+//              
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include "flash.h"
+
+#include <cyg/hal/hal_cache.h>
+
+//
+// CAUTION!  This code must be copied to RAM before execution.  Therefore,
+// it must not contain any code which might be position dependent!
+//
+
+int
+flash_lock_block(volatile unsigned long *block)
+{
+    volatile unsigned long *ROM;
+    unsigned long stat;
+    int timeout = 5000000;
+    int cache_on;
+
+    ROM = (volatile unsigned long *)((unsigned long)block & 0xFF800000);
+
+    HAL_DCACHE_IS_ENABLED(cache_on);
+    if (cache_on) {
+        HAL_DCACHE_SYNC();
+        HAL_DCACHE_DISABLE();
+    }
+
+    // Clear any error conditions
+    ROM[0] = FLASH_Clear_Status;
+
+    // Set lock bit
+    block[0] = FLASH_Set_Lock;
+    block[0] = FLASH_Set_Lock_Confirm;  // Confirmation
+    while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
+        if (--timeout == 0) break;
+    }
+
+    // Restore ROM to "normal" mode
+    ROM[0] = FLASH_Reset;
+
+    if (cache_on) {
+        HAL_DCACHE_ENABLE();
+    }
+
+    return stat;
+}