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Re: kern/51231: Detect PCI mode from BIOS if exists
The following reply was made to PR kern/51231; it has been noted by GNATS.
Subject: Re: kern/51231: Detect PCI mode from BIOS if exists
Date: Tue, 28 Jun 2016 06:19:04 +0000
jakllsch's PCI mode 2 machine (a 586) is reporting as mode 1 in BIOS.
PCI mode 2 only exists in machines from PCI 1.0 introduction to PCI 2.0
introduction (1992-1993 roughly).
We don't know of any problems in detecting mode for older machines, so
maybe use a year test, and anything a good bit newer is definitely PCI
Alternate idea: test existence of SMBIOS (introduced 1999). if it exists
- assume mode 1.
Side note: we have an ACPI blacklist year 2000 which checks SMBIOS
(introduced 1999), it's probably not too useful.
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