On Thursday 10 November 2005 05:48 am, kylin wrote: > Sir ,i am still puzzled by the windows and freebsd arch similar. > 1 > the window TPS say that windwo allocate the resource window in default > size of 1M or 2M,so there may be hole ,does that happen in freebsd 5 > or 6?
No. > 2 > in my view i believe that freebsd us the "just enough "tactics,so > the nexus level of resource view is ===continuous====with NO hole in > a boot up system, IF hot remove do not happen .am i right? Sorta. We actually will use whatever the BIOS uses by default. We only try to alloc resources if the BIOS doesn't, and I'm not sure how we handle a bridge running out of resources. I think we might just fail the allocation. > 3 > IF i do a PCI hotplug under a bridge, and the bridge 's MEM Window is > full ,i have to do reballacne (including use the device_pause > method:)), and if i can not declaim the resource from other bridge > because "nexus level of resource view is ===continuous====with NO hole > ", can i extend the physical address space beyond the boot time > locate range to PCI host bridge ? Well, if you had device_pause() you would be able to shuffle resources from one bridge to another perhaps. Preallocating bigger chunks as your first question suggested might be a lot simpler though not completely fool proof. > On 11/6/05, John Baldwin <[EMAIL PROTECTED]> wrote: > > On Sunday 06 November 2005 06:14 am, kylin wrote: > > > On 11/6/05, M. Warner Losh <[EMAIL PROTECTED]> wrote: > > > > In message: > > > > <[EMAIL PROTECTED]> > > > > > > > > kylin <[EMAIL PROTECTED]> writes: > > > > : /////////////// > > > > : pci bridge dynamic resize > > > > : ///////////// > > > > : it seems that the device arch of freebsd is similar to what is > > > > : revealed in window OS. i have read the pcie hotplug tps of windows > > > > : longhorn ,it is said that with some hardware mechanisms the pci > > > > : bridge driver can do global pci resource window reconfiguration.so > > > > : good to the hotplugin pci device for it avoid prelocating resource > > > > : for the device . > > > > : i wonder ,if the mem /io/irq reconfiguration possible under freebsd > > > > : .:) 1 > > > > > > > > Yes. Cardbus does it all the time. However, there's no pcie > > > > hot-plug support yet, so the process for kicking off configuration of > > > > the new device doesn't happen. > > > > > > > > Warner > > > > > > sorry for my poor grammar ,i think i confused the public:) i will make > > > myself clear with the words below about the PCI Multi-level Rebalance > > > > > > PCI Multi-level Rebalance in Windows Longhorn > > > Updated: November 25, 2003 > > > > No, FreeBSD doesn't currently do what this decribes yet. It would be > > possible to do it by adding a new device_pause() method that drivers > > would be required to implement while the resources were shuffled around > > though and possibly a device_unpause() method so that they could update > > their state if their resources were changed while the device was paused. > > > > -- > > John Baldwin <[EMAIL PROTECTED]> <>< http://www.FreeBSD.org/~jhb/ > > "Power Users Use the Power to Serve" = http://www.FreeBSD.org > > -- > we who r about to die,salute u! -- John Baldwin <[EMAIL PROTECTED]> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
