diff --git a/arch/blackfin/include/asm/uaccess.h b/arch/blackfin/include/asm/uaccess.h
index 8894e9f..2f469a1 100644
--- a/arch/blackfin/include/asm/uaccess.h
+++ b/arch/blackfin/include/asm/uaccess.h
@@ -265,4 +265,26 @@
 
 #define clear_user(to, n) __clear_user(to, n)
 
+/* How to interpret these return values:
+ *	CORE:      can be accessed by core load or dma memcpy
+ *	CORE_ONLY: can only be accessed by core load
+ *	DMA:       can only be accessed by dma memcpy
+ *	IDMA:      can only be accessed by interprocessor dma memcpy (BF561)
+ *	ITEST:     can be accessed by isram memcpy or dma memcpy
+ */
+enum {
+	BFIN_MEM_ACCESS_CORE = 0,
+	BFIN_MEM_ACCESS_CORE_ONLY,
+	BFIN_MEM_ACCESS_DMA,
+	BFIN_MEM_ACCESS_IDMA,
+	BFIN_MEM_ACCESS_ITEST,
+};
+/**
+ *	bfin_mem_access_type() - what kind of memory access is required
+ *	@addr:   the address to check
+ *	@size:   number of bytes needed
+ *	@return: <0 is error, >=0 is BFIN_MEM_ACCESS_xxx enum (see above)
+ */
+int bfin_mem_access_type(unsigned long addr, unsigned long size);
+
 #endif				/* _BLACKFIN_UACCESS_H */