Alexei Babich <a.babich@rez.ru> fix problems with unecessary tailend byte accesses. Use 16 bit access on tailend of a memory read if possible.

git-svn-id: svn://svn.berlios.de/openocd/trunk@2684 b42882b7-edfa-0310-969c-e2dbd0fdcd60

src/target/target.c

@@ -1239,7 +1239,19 @@ int target_read_buffer(struct target_s *target, uint32_t address, uint32_t size,
 		address += aligned;
 		size -= aligned;
 	}
+	
+	/*prevent byte access when possible (avoid AHB access limitations in some cases)*/
+	if(size	>=2)
+	{
+		int aligned = size - (size%2);
+		retval = target_read_memory(target, address, 2, aligned / 2, buffer);
+		if (retval != ERROR_OK)
+			return retval;
 
+		buffer += aligned;
+		address += aligned;
+		size -= aligned;
+	}
 	/* handle tail writes of less than 4 bytes */
 	if (size > 0)
 	{