From owner-freebsd-hackers@FreeBSD.ORG  Wed Apr 11 14:19:05 2007
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Date: Wed, 11 Apr 2007 09:09:26 -0500
From: Craig Boston <craig@tobuj.gank.org>
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Subject: Re: Resources and ACPI
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On Wed, Apr 11, 2007 at 09:02:14AM -0500, Craig Boston wrote:
> If it seems like magic, that's because it is. :)  For PnP busses like
> PCI, ISAPnP, and ISA-ACPI/LPC-ACPI, the OS takes care of figuring out
> what resources to use and allocates them.

I almost forgot, the busdma functions work for non-PnP busses like
really old ISA cards as well.  The only difference is that the user has
to specify the resources manually in /boot/device.hints, but there's a
standard API for this as well.

Craig