man.postnix Miscellaneous man pages of Plan 9 related material

     INTRENABLE(10.2)                                 INTRENABLE(10.2)

     NAME
          intrenable - interrupt handler registration

     SYNOPSIS
          void intrenable(int v, void (*f)(Ureg*, void*), void* a, int
          tbdf);

     DESCRIPTION
          Intrenable registers f to be executed by the system on
          receipt of the interrupt defined by the platform-dependent
          encoding v (it is often an interrupt level, but can be more
          complex).  The pointer a is passed to f. The tbdf parameter
          is a platform-dependent value that denotes the type of bus,
          bus instance, device number and function (cf. the PCI device
          indexing scheme).

          A linked list of such functions is maintained per interrupt
          level. The intrenable function inserts the current function
          at the head of that list.

          There is no mechanism for removing an interrupt handler from
          the list.

          The Ureg structure provided to f contains the registers at
          the time of interrupt. The contents are platform specific;
          see the include file u.h.

     SEE ALSO
          splhi(10.2)

     Page 1                       Plan 9             (printed 11/9/25)