Date: Tue, 2 Aug 2005 19:58:38 +0200 From: Wilko Bulte <wb@freebie.xs4all.nl> To: ticso@cicely.de Cc: freebsd-alpha@freebsd.org Subject: Re: KZPCC-CE SCSI controller Message-ID: <20050802175838.GC62825@freebie.xs4all.nl> In-Reply-To: <20050802174144.GA71814@cicely12.cicely.de> References: <42EE1A34.6510B1CE@fadesa.es> <20050801151501.GA53593@freebie.xs4all.nl> <20050802172322.GC71672@dragon.NUXI.org> <20050802174144.GA71814@cicely12.cicely.de>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Aug 02, 2005 at 07:41:44PM +0200, Bernd Walter wrote.. > On Tue, Aug 02, 2005 at 10:23:22AM -0700, David O'Brien wrote: > > On Mon, Aug 01, 2005 at 05:15:01PM +0200, Wilko Bulte wrote: > > > Yes, asr(4) is not in the default Alpha kernels. > > .. > > > Would be interesting to know if it works or not, then we can go and > > > add it into the default GENERIC for FreeBSD/alpha install cds. > > > > It will not work as-is. I suspect it could be made to work using the > > ugly hack we have elsewhere in src/sys: > > > > #ifdef __alpha__ > > #undef vtophys > > #define vtophys(va) alpha_XXX_dmamap((vm_offset_t)va) > > So this driver is not busdma'ed yet? > Igh - this will invalidate it for lots of machines, not just alpha. > Since I'm working on > 2G support and AFAIK the asked machine can > have more than that this may be a problem. DS20, hmm, I don't recall the max off the top of my head, but well >> than 2 GB for sure. > I intent to panic if a driver calls vtophys on a large mem alpha. > Otherwise I see no option to protect systems from failing in > spectacular ways. > I don't think we can expect users to not accidently activate such > drivers - especially as those problems may be hidden for a while. > We could get such drivers working by using a large direct map, but > since most of the problematic cards can only do 32bit addressing > this wouldn't help that much. > > -- > B.Walter BWCT http://www.bwct.de > bernd@bwct.de info@bwct.de --- end of quoted text --- -- Wilko Bulte wilko@FreeBSD.org
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20050802175838.GC62825>