Daemon News Ezine BSD News BSD Mall BSD Support Forum BSD Advocacy BSD Updates

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Adding newbus abstraction to parallel port devices

Hi all,

last time I looked, the parallel port chipset driver (isa/ppc) uses
microsequences to handle the hardware control/data ports for the
parallel port.  For anyone who is unfamiliar with these, they are macros
built from I/O port bitmasks to handle the necessary hardware 
control to run the parallel port.

The committer that wrote the parallel port driver said he used
microsequences because the driver was designed/implemented before

Since the purpose of the microsequences was (a) hardware abstraction and
(b) to increase speed, how could this be re-written to use newbus
instead without a performance loss?

My other computer is your windows box.

To Unsubscribe: send mail to majordomo@xxxxxxxxxxx
with "unsubscribe freebsd-new-bus" in the body of the message