On Tuesday 11 July 2006 15:21, [EMAIL PROTECTED] wrote: > John Baldwin wrote: > > > On Tuesday 11 July 2006 12:33, M. Warner Losh wrote: > >> In message: <[EMAIL PROTECTED]> > >> John Baldwin <[EMAIL PROTECTED]> writes: > >> : and OS X both of which I've written a PCI driver for) we require device > >> : driver writers to go through a lot more hoops to do certain things like > >> : allocate resources. At the very least there is much that can be improved > > in > >> : our driver model. > >> > >> bus_alloc_resources goes a long ways in this respect. > > > > Yes, but in OS X I didn't even have to do that. All I had to do was ask it to > > map a BAR if I wanted to use it. It already "allocated" all the resources > > regardless. Windows was the same way (though a bit weirder, you get a > > message that lists all your resources and you have to map them if you want to > > use them). > > > > -- > > John Baldwin > > Do you mean that the kernel pre-allocate resources for all devices whether > a device has been attached by a device driver? > Does BIOS do the same thing before OS boots?
Maybe (kernel can allocate it once probe has succeeded perhaps, or just always do it) and Yes (if PNP OS is set to No, that is what PNP OS means, is if the OS is smart enough to alloc the resources on its own). -- John Baldwin _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
