ichwd0: unable to reserve GCS registers

[Doug Barton]

On 07/30/2011 05:34, John Baldwin wrote:
> On Saturday, July 30, 2011 02:49:52 AM Andriy Gapon wrote:
>> on 19/07/2011 18:16 John Baldwin said the following:
>>> Hmm, can you get devinfo -r output from a working kernel with ichwd
>>> loaded? You might be able to just build the kernel with 'nooptions
>>> NEW_PCIB'.

So is this still relevant? I'm sorry I haven't had a chance to get this
done, but I may be able to this weekend if you still think it's useful.


Doug

>> I believe that I've got a similar problem with amdsbwd(4).
>> It needs some resources (I/O ports) that belong to ACPI.
>> The problem is that the driver attaches to isa bus which is under
>> isab->pci->pcib and those particular resources are not assigned to the
>> Host-PCI bridge.
>>
>> I think that you already made a suggestion that perhaps isa bus should 
>> directly attach to acpi bus when acpi is available.  Not sure if there are
>> any alternative approaches.
> 
> Actually, my suggestion was the other way around (we should move certain ACPI 
> devices down behind isab so they are behind the Host-PCI bridge as they are in 
> hardware).  In this case the BIOS clearly does not list the reosurces for the 
> GCS as valid resources for the Host-PCI bridge.  This is part of the reason 
> that I added the 'debug.acpi.disable="hostres"'.  One thing we may be able to 
> do is allow non-wildcard requests that are outside the range to still pass if 
> they are in ACPI's system resource range perhaps.
> 



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