i386_set_ioperm(2)/i386_get_ioperm(2) replacement after switch from x86 to amd64

[Alexander Best]

hi there,

i recently switch from x86 to amd64. right now i'm looking for a way to
replace i386_set_ioperm(2) and i386_get_ioperm(2) (which are x86 specific).
any suggestions?

* full /dev/io access is rather nasty
* the app i'm developing is using inb/outb opcodes through inline assembly in
order to access the parallel port. i tried using ppi(4), but that slows down
things dramatically (see:
http://lists.freebsd.org/pipermail/freebsd-hackers/2009-July/029188.html)

cheers.
alex