diff --git a/src/blockdev.h b/src/blockdev.h
new file mode 100644
index 0000000..77256aa
--- /dev/null
+++ b/src/blockdev.h
@@ -0,0 +1,36 @@
+#ifndef BLOCKDEV_H
+#define BLOCKDEV_H
+
+/** devopen
+ * @param name    Filename to be used as blockdevice
+ * @param reopen  Unused, set NULL
+ * @return        1 on success, 0 on failure !CAUTION
+ */
+int devopen(const char *name, int *reopen);
+
+/** devclose
+ */
+void devclose(void);
+
+/** devread
+ * @param sector       512 byte sector of the block device
+ * @param byte_offset  Offset in the block
+ * @param byte_len     Buffer length
+ * @param buf          Buffer
+ * @return             1 on sucess, 0 on failure !CAUTION
+ */
+int devread(unsigned long sector, unsigned long byte_offset,
+	unsigned long byte_len, void *buf);
+
+
+//void dev_set_partition(unsigned long start, unsigned long size);
+//void dev_get_partition(unsigned long *start, unsigned long *size);
+
+//int file_open(const char *filename);
+//int file_read(void *buf, unsigned long len);
+//unsigned long file_seek(unsigned long offset);
+//unsigned long file_size(void);
+//void file_set_size(unsigned long size);
+//void file_close(void);
+
+#endif /* BLOCKDEV_H */