Reference Guide

ZCOM Tables and Data Structures
ZCOM Kernel Data
Chapter 3 127
HACTIVE - Number of active requests
This field contains the number of pending inter-driver requests from the
LDM to DAM. A non-zero value indicates some LDM requests are being
processed by the DAM, hence deallocation of the driver resources is not
allowed (i.e., driver unbinding). This feature is intended for the
implementation of dynamic hardware reconfiguration in HP-UX.
SX25_BRDN - Streams X.25 board number
This field is used internally by the driver for keeping track of the J2793A
Streams X.25 assigned board number, used for this card in the SNID.
DVR - Call entry for the interface driver
This is a kernel function pointer to the DAM’s primary entry point. It is
for the LDM to request the DAM’s services. It is set up by the DAM
during system bootup.
BUS1_NUM - Bus converter position (U2) of the interface card
BUS_NUM - Bus number of the interface card
SLOT_NUM - Slot number of the card
These 3 fields are set up by the DAM during system bootup. It contains
the hardware path of the associated interface card.
HW_ADDRESS - A string containing the hardware path to the card.
HLOCK - IFT spinlock
It is allocated by the DAM during system bootup. It is used to allow
sharing resources in a Multi-Processor system. When a module requires
exclusive access to a IFT, it must obtain this lock first.