start io subsystem

driver/counter_io_calls.h

@@ -0,0 +1,19 @@
+#ifndef _COUNTER_IO_CALLS_H_
+#define _COUNTER_IO_CALLS_H_
+
+#ifndef __KERNEL__
+#include <stdint.h>
+#define u64 uint64_t
+#define u32 uint32_t
+#endif
+
+struct observation {
+  u64 ts_sec;
+  u64 ts_nsec;
+  u32 value;
+};
+
+
+
+
+#endif /* _COUNTER_IO_CALLS_H_ */