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Message-ID: <33952291.654E@cki.ipri.kiev.ua>
Date: Wed, 04 Jun 1997 11:08:49 +0300
From: Ruslan Shevchenko <rssh@cki.ipri.kiev.ua>
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To: Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de>
CC: hackers@FreeBSD.ORG, Larry Lile <lile@stdio.com>
Subject: Re: Tropic token ring driver
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. ;-)