Date: Fri, 6 Feb 1998 15:07:21 -0800 (PST) From: Vinay Bannai <bannai@best.com> To: deischen@iworks.InterWorks.org (Daniel M. Eischen) Cc: bannai@best.com, freebsd-hackers@FreeBSD.ORG Subject: Re: VME support!! Message-ID: <199802062307.PAA00428@shell6.ba.best.com> In-Reply-To: <34DB6F2C.41C67EA6@iworks.InterWorks.org> from "Daniel M. Eischen" at "Feb 6, 98 03:14:36 pm"
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According to Daniel M. Eischen: > > I have a 486 board with a VME port. I intend to run FreeBSD on it and > > interface to the VME boards that attach to it. As far as I can tell, there > > is no support for a VME bus in FreeBSD. > > No, but this is something I really want also. We've got a > similar Pentium-based board with a PCI<->VME bridge chip (Tundra) > here at work. I'm busy on another project, and haven't had > the chance to add support for this chip to FreeBSD. > > If all you want to do is be able to map VME addresses to the > PCI bus, it isn't really that hard (given that you know how > to program the bridge chip). You could write a simple driver > to do this and make the VME addresse space available to a userland > program. Adding support for multiple VME devices generating > interrupts is more complicated though. > I know. But we do need the support for multiple accesses to the VME devices. Also I don't want to mmap the registers into userland and run it. I have done PCI drivers and hoping this is not going to be painful. I will save your e-mail address and perhaps we can exchange some ideas. I will be working on this starting this weekend. > > Can someone point me to any work which has been done in this area? I will > > be getting the details and data sheet of the VME controller chip. The > > board is sold by a company called Cyclone based out of Connecticut. > > I'm in CT also, but haven't heard of them. I just checked out > their web site, and saw mostly i960 boards but no Pentiums. > > Dan Eischen > deischen@gdeb.com Yeah. They mostly do i960 boards. They are fairly decent. Vinay -- Vinay Bannai E-mail: bannai@best.com
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