Re: PCI hotplug question: resources

[Matti Aarnio <matti.aarnio+linux-hotplug@zmailer.org>]

On Tue, Feb 05, 2002 at 12:37:20PM +0100, Dirk Stieler wrote:
> Hello hotplug developers,
> 
> I am a "hotplug newbie" and maybe this is not the right place for my
> question, so please excuse if this thread is wrong here.
> 
> I have a standard personal computer, not really a hotplug system.
> 
> But I have developed a PCI-card which is "not present" at boot time
> because there is no firmware in the FPGA which is responsible for PCI
> communication.

   You really should create circuitry definitions which implement
   the reset-time initial state for PCI "hotplugging".

   - Type data
   - IO address space size
   - MEM address space size
   - Number of IRQs

   (and whatnot else there was..)

   Then any BIOS will do the startup job for you.
   (And even Linux can do it by reworking the PCI configuration datasets.)

> After the configuration of the FPGA I have to determine which
> PCI-resources I can use for the card ( IO, mem, IRQ ) and assign this
> resources to it.
> 
> You know what I mean?
> How can I solve this problem?
> Maybe it's trivial for you but I haven't found an solution yet.

   All of that is just basic PCI specification stuff.

   IF your FPGA isn't loaded from e.g. serial flash, but rather from
   the host processor, then you are screwed...

> Thank you, regards,
>    Dirk Stieler

/Matti Aarnio

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