>>>>> "linux" == linux <[EMAIL PROTECTED]> writes:
linux> Philip Blundell writes:
>> What do you estimate the slowdown would be from introducing a
>> variable into these calculations?
linux>...
linux> However, you wouldn't want to cache the setting, since the
linux> base register is free to be changed by any PNP BIOS or OS at
linux> any time. Only the host knows what the current state of the
linux> PCI bus mapping is.
Does any OS actually do such a bizarre thing (change the base register
out from under a device that's in use)? It is obvious that new
devices get new addresses and disappearing devices have their
addresses freed, but the notion of moving base addresses of active
hardware on the fly strikes me as absurd. For one thing, depending on
the device you cannot even do such a thing at all if there is any I/O
pending.
paul
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