Where is the definition of RTEMS_MAXIMUM_DISABLE_PERIOD

[Mao Yilu]

Hi, all,

I was reading the document RTEMS CPU Architecture Supplement. There is a
macro called RTEMS_MAXIMUM_DISABLE_PERIOD referred in it. The address is
http://www.rtems.org/onlinedocs/releases/rtemsdocs-4.7.1/share/rtems/html/cp
u_supplement/cpu_supplement00047.html. But I can't find definition of it in
the code. Is this macro still available in current code?

Thanks all,
Mao Yilu