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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: Thomas Klausner <>
Cc: NetBSD bugtracking <>
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, 
 >      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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