org-cycle-global-at-bob

org-cycle-global-at-bob is a variable defined in `org.el'.
Its value is

nil

Documentation:
Cycle globally if cursor is at beginning of buffer and not at a headline.
This makes it possible to do global cycling without having to use S-TAB or
C-u TAB. For this special case to work, the first line
of the buffer must not be a headline -- it may be empty or some other text.
When used in this way, `org-cycle-hook' is disabled temporarily to make
sure the cursor stays at the beginning of the buffer. When this option is
nil, don't do anything special at the beginning of the buffer.

You can customize this variable.