kern/70037: ALI AGP fails / panics system
tinguely at casselton.net
Thu Aug 5 08:40:32 PDT 2004
>Synopsis: ALI AGP fails / panics system
>Arrival-Date: Thu Aug 05 15:40:31 GMT 2004
>Originator: Mark Tinguely
>Release: FreeBSD 4.x and 5.x
Many ALI based AGP chipsets cannot correct detect the Aperture size. In FreeBSD 4.x kernels, this causes a panic. In FreeBSD-current just fails to initialize the AGP. The problem is the ALI Aperture size test is wrong. This fix was taken from NetBSD. I do not agree with the mask in the agp_ali_detach() routine and put a "XXX comment". The below patch has been confirmed by another person who has the chipset.
Boot a AGP enabled kernel on certain ALI chipset on FreeBSD 4.x or FreeBSD 5.x.
The following URL is a FreeBSD 4.10-RELEASE and FreeBSD-current (08/05/2004) unified diff to solve the problem:
This came from NetBSD. Visually, I think the agp_ali_detach() mask does not return the chipset to its original value.
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