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diff --git a/Documentation/blackfin/cachefeatures.txt b/Documentation/blackfin/cachefeatures.txt
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+/*
+ * File:         Documentation/blackfin/cachefeatures.txt
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  This file contains the simple DMA Implementation for Blackfin
+ *
+ * Rev:          $Id: cachefeatures.txt 2384 2006-11-01 04:12:43Z magicyang $
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ */
+
+        - Instruction and Data cache initialization.
+                icache_init();
+                dcache_init();
+
+        -  Instruction and Data cache Invalidation Routines, when flushing the
+           same is not required.
+                _icache_invalidate();
+                _dcache_invalidate();
+
+        Also, for invalidating the entire instruction and data cache, the below
+        routines are provided (another method for invalidation, refer page no 267 and 287 of
+        ADSP-BF533 Hardware Reference manual)
+
+                invalidate_entire_dcache();
+                invalidate_entire_icache();
+
+        -External Flushing of Instruction and data cache routines.
+
+                flush_instruction_cache();
+                flush_data_cache();
+
+        - Internal Flushing of Instruction and Data Cache.
+
+                icplb_flush();
+                dcplb_flush();
+
+        - Locking the cache.
+
+                cache_grab_lock();
+                cache_lock();
+
+        Please refer linux-2.6.x/Documentation/blackfin/cache-lock.txt for how to
+        lock the cache.
+
+        Locking the cache is optional feature.
+
+        - Miscellaneous cache functions.
+
+                flush_cache_all();
+                flush_cache_mm();
+                invalidate_dcache_range();
+                flush_dcache_range();
+                flush_dcache_page();
+                flush_cache_range();
+                flush_cache_page();
+                invalidate_dcache_range();
+                flush_page_to_ram();
+