NAME
intio
- hp300 internal I/O space driver
SYNOPSIS
intio0 at mainbus0
DESCRIPTION
intio
is a virtual device corresponding to the hp300 internal I/O space.
Internal I/O space spans the hp300 physical address space, and is
mapped permanently in the kernel virtual space at the very early time
of the kernel startup procedure.
intio
driver manages the internal I/O space of hp300.
-
Address range management to avoid confliction of address space of
which devices probe by touching hardware port is difficult.
-
Interrupt vector management.
-
bus_space(9)
and
bus_dma(9)
implementation.
-
Other utility functions.
intio
is always required to run the
NetBSD
kernel.
SEE ALSO
bus_dma(9),
bus_space(9)