Date: Wed, 11 Jun 2003 21:34:27 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: "M. Warner Losh" <imp@bsdimp.com>, ticso@cicely.de, ticso@cicely12.cicely.de, freebsd-current@freebsd.org, freebsd-sparc64@freebsd.org Subject: Re: PCI bus numbering and orphaned devices Message-ID: <20030611193425.GN26807@cicely12.cicely.de> In-Reply-To: <20030611142627.GB634@crow.dom2ip.de> References: <20030609.224621.71095461.imp@bsdimp.com> <20030610115615.GB10527@cicely12.cicely.de> <20030610121249.GE10527@cicely12.cicely.de> <20030610.082730.102566465.imp@bsdimp.com> <20030610223436.GC37257@funkthat.com> <20030610230230.GC734@crow.dom2ip.de> <20030610234144.GA39701@funkthat.com> <20030611142627.GB634@crow.dom2ip.de>
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On Wed, Jun 11, 2003 at 04:26:27PM +0200, Thomas Moestl wrote: > On Tue, 2003/06/10 at 16:41:44 -0700, John-Mark Gurney wrote: > > Ok, the only problem is that is then we have the same problem the ACPI > > code does in that hot swapping cards would have a problem. Since it > > appears to me that the OFW tree doesn't get updated upon a swap. (At > > least the usb part of the tree doesn't.) > > We do not support hotplugging at the moment anyway. If a bridge driver > would implement that in the future without using any firmware support > however, it will then need to know everything information about the > interrupt routing required for its devices if it cannot use the > firmware for this. in that case, it can just prevent the ofw_pci bus > from attaching to it (this will be easily possible). > I'd hope that machines that support hot-plugging of PCI devices would > have firmware methods available to support that though. I have no clue about cardbus, but for PCI hotplugging you need hardware specific support to power down the slots. But hotplug PCI is not a realm of specific machines, as you can attach add-on hotplug frames to any PCI system. -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de
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