new file mode 100644
--- /dev/null
+++ b/packages/devs/flash/intel/strata/current/src/flash_unlock_block.c
@@ -0,0 +1,130 @@
+//==========================================================================
+//
+//      flash_unlock_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, 2001 Red Hat, Inc.
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    gthomas, hmt
+// Contributors: gthomas
+// Date:         2001-02-14
+// Purpose:      
+// Description:  
+//              
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include "strata.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!
+//
+
+//
+// The difficulty with this operation is that the hardware does not support
+// unlocking single blocks.  However, the logical layer would like this to
+// be the case, so this routine emulates it.  The hardware can clear all of
+// the locks in the device at once.  This routine will use that approach and
+// then reset the regions which are known to be locked.
+//
+
+#define MAX_FLASH_BLOCKS 128
+
+int
+flash_unlock_block(volatile flash_t *block, int block_size, int blocks)
+{
+    volatile flash_t *ROM, *bp, *bpv;
+    flash_t stat;
+    int timeout = 5000000;
+    unsigned char is_locked[MAX_FLASH_BLOCKS];
+    int i, cache_on;
+
+    HAL_DCACHE_IS_ENABLED(cache_on);
+    if (cache_on) {
+        HAL_DCACHE_SYNC();
+        HAL_DCACHE_DISABLE();
+    }
+
+    // Get base address and map addresses to virtual addresses
+    ROM = FLASH_P2V( CYGNUM_FLASH_BASE_MASK & (unsigned int)block );
+    block = FLASH_P2V(block);
+
+    // Clear any error conditions
+    ROM[0] = FLASH_Clear_Status;
+
+    // Get current block lock state.  This needs to access each block on
+    // the device so currently locked blocks can be re-locked.
+    bp = ROM;
+    for (i = 0;  i < blocks;  i++) {
+        bpv = FLASH_P2V( bp );
+        *bpv = FLASH_Read_Query;
+        if (bpv == block) {
+            is_locked[i] = 0;
+        } else {
+            is_locked[i] = bpv[2];
+        }
+        bp += block_size / sizeof(*bp);
+    }
+
+    // Clears all lock bits
+    ROM[0] = FLASH_Clear_Locks;
+    ROM[0] = FLASH_Clear_Locks_Confirm;  // Confirmation
+    timeout = 5000000;
+    while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
+        if (--timeout == 0) break;
+    }
+
+    // Restore the lock state
+    bp = ROM;
+    for (i = 0;  i < blocks;  i++) {
+        bpv = FLASH_P2V( bp );
+        if (is_locked[i]) {
+            *bpv = FLASH_Set_Lock;
+            *bpv = FLASH_Set_Lock_Confirm;  // Confirmation
+            timeout = 5000000;
+            while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
+                if (--timeout == 0) break;
+            }
+        }
+        bp += block_size / sizeof(*bp);
+    }
+
+    // Restore ROM to "normal" mode
+    ROM[0] = FLASH_Reset;
+
+    if (cache_on) {
+        HAL_DCACHE_ENABLE();
+    }
+
+    return stat;
+}