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From: John Baldwin <jhb@freebsd.org>
To: Doug Barton <dougb@freebsd.org>
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Cc: freebsd-current@freebsd.org, Andriy Gapon <avg@freebsd.org>
Subject: Re: ichwd0: unable to reserve GCS registers
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On Wednesday, August 03, 2011 3:55:17 am Doug Barton wrote:
> On 08/02/2011 15:06, John Baldwin wrote:
> > On Saturday, July 30, 2011 2:49:52 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'.
> >>
> >> 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.
> > 
> > Can you try this:
> 
> Not so much. :) the first and last patches I can apply to HEAD by hand,
> but /sys/dev/acpica/acpi_pcib_acpi.c is only 387 lines long, so I'm not
> even sure where to start.
> 
> Any chance you could diff against HEAD?

I believe this should be fixed (well, worked-around) by my most recent commit
to sys/dev/acpica/acpi_pcib_acpi.c in HEAD.

-- 
John Baldwin