mfp
—
X68K Multi-function Peripherals
mfp0 at intio0 addr 0xe88000 size 0x2000 intr 64
mfp
drives Motorola MC68901 MFP (Multi-function
Peripheral). mfp
driver is always required to run the
NetBSD/x68k kernel, because it is connected to
important devices such as the display controller, and provides fundamental
functions like the system clock tick and interrupt controller. Since
mfp
provides many functions, most of the jobs as a
device driver is done by its child drivers such as
kbd(4) and
clock(4).
mfp
driver itself only provides the common way to
access its registers and a few utility functions for other non-child drivers.
Machine-dependent part and machine-independent part should be split.