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From: John Baldwin <jhb@freebsd.org>
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Subject: Re: svn commit: r298372 - head/sys/dev/acpica
Date: Wed, 20 Apr 2016 15:21:11 -0700
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On Wednesday, April 20, 2016 08:58:30 PM John Baldwin wrote:
> Author: jhb
> Date: Wed Apr 20 20:58:30 2016
> New Revision: 298372
> URL: https://svnweb.freebsd.org/changeset/base/298372
> 
> Log:
>   Invoke _OSC on Host-PCI bridges.
>   
>   Tell the firmware that we support PCI-express config space access
>   and MSI.

We should perhaps have some constants for some of the _OSC related fields.
I'm surprised ACPI-CA doesn't include constants for at least the return
values in the first word _OSC returns since that is defined by ACPI and
common to all the different _OSC variants.

-- 
John Baldwin