Date: Wed, 04 Jun 1997 11:08:49 +0300 From: Ruslan Shevchenko <rssh@cki.ipri.kiev.ua> To: Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de> Cc: hackers@FreeBSD.ORG, Larry Lile <lile@stdio.com> Subject: Re: Tropic token ring driver Message-ID: <33952291.654E@cki.ipri.kiev.ua> References: <3392FC14.41C6@stdio.com> <19970602223654.XZ56494@uriah.heep.sax.de>
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J Wunsch wrote: > > As Larry Lile wrote: > > > Right now I am picking up the shared ram address > > from the foo->id_maddr in the probe routine and kvtop(foo->id_maddr) > > gives the correct physical address. What I would like to do is > > pick up the address from 0x0a20 (Which after some math is usually > > either 0xcc000 or 0xdc000) and get a kvm address to it, ie the > > inverse of kvtop. > > Do you only need the KVA of it (i.e., you don't need it for things > like DMA)? If the shared memory is always in the ISA hole, there's a > fixed mapping for it (i think you need to add 0xf000000 to the > physical address). For devices that go into the higher memory area > (like PCI), you need to map it yourself anyway. > > > Also, how do you get your driver registered into the boot-up > > config? (Right now it would be helpful for debugging) > > That's still handwork, to go into /sys/i386/i386/userconfig.c. > In principle, all would be work without touching it. (in boot config you can configure misc/unknown device ) and about patching userconfig --- look on READMe to ppa3 driver: http://www.prism.uvsq.fr/~son/ppa3.html > -- > cheers, J"org > > joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE > Never trust an operating system you don't have sources for. ;-)
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