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Re: kern/41961: ISA devices should not attach to acpi0
The following reply was made to PR kern/41961; it has been noted by GNATS.
From: "Jared D. McNeill" <jmcneill%invisible.ca@localhost>
Subject: Re: kern/41961: ISA devices should not attach to acpi0
Date: Mon, 31 Aug 2009 11:04:12 -0400
On 31-Aug-09, at 10:40 AM, Thomas Klausner wrote:
> The following reply was made to PR kern/41961; it has been noted by
> From: Thomas Klausner <wiz%NetBSD.org@localhost>
> To: jmcneill%invisible.ca@localhost
> Cc: NetBSD bugtracking <gnats-bugs%NetBSD.org@localhost>
> Subject: Re: kern/41961: ISA devices should not attach to acpi0
> Date: Mon, 31 Aug 2009 16:35:33 +0200
> On Mon, Aug 31, 2009 at 12:45:00PM +0000, jmcneill%invisible.ca@localhost
>> There are a few possible ways to resolve this, from best to worst:
>> 1. Attach the root PCI bus to acpi, and use the information in the
>> ACPI decide tree to help enumerate devices on the system. This is
>> the ideal approach, and will also require the most effort.
>> 2. Have ACPI enumerate all ISA devices and hand it off to MD code.
>> MD code in turn uses isa_attach_hook to push in a list of known
>> devices to isa, and drivers are adapted using ISA_DIRECT_CONFIG.
>> 3. Create a bus similar to isapnp but for ACPI devices.
>> A proof of concept for option against -current can be found here:
> Which option?
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