Subject: Re: ISA direct config of ACPI devices
To: Jared D. McNeill <>
From: Andrew Doran <>
List: tech-kern
Date: 11/21/2007 20:53:35
On Wed, Nov 21, 2007 at 03:41:49PM -0500, Jared D. McNeill wrote:

> Heyas folks --
> I would like to attach ISA devices enumerated by ACPI to 'isa0' rather 
> than 'acpi0'. The following patch accomplishes this for me:
> With this patch, on a standard GENERIC kernel, I get:
>   $ dmesg | grep 'at isa'
>   attimer0 at isa0 (PNP0100) port 0x40-0x43 irq 0: AT Timer
>   pcppi0 at isa0 (PNP0800) port 0x61
>   PNP0303 at isa0 port 0x60,0x64 irq 1 not configured
>   IBM0057 (PNP0F13) at isa0 irq 12 not configured
>   pckbc0 at isa0 port 0x60-0x64
> Note that I haven't converted pckbc_isa to support direct configuration 
> yet, as it needs a bit more work than regular isa drivers. In any case, 
> the kernel was smart enough to fall back and use an indirect config 
> attachment here. We will be able to remove many of the driver glue in 
> dev/acpi/ as a result.
> Also, this will have the side effect of numbering ACPI enumerated com 
> devices properly, which many people find annoying.
> Comments?

Nice! One comment:

--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ dev/isa/isadevs	21 Nov 2007 20:29:28 -0000

Most of these entries are already in isapnpdevs. Is there a problem with
sharing the tables?