From owner-freebsd-hackers  Sun Jul  6 17:55:02 1997
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To: Simon Shapiro <Shimon@i-Connect.Net>
cc: FreeBSD-Hackers@FreeBSD.ORG
Subject: Re: PCI Bridge Question 
In-reply-to: Your message of "Sun, 06 Jul 1997 16:36:19 PDT."
             <XFMail.970706163619.Shimon@i-Connect.Net> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Sun, 06 Jul 1997 17:56:25 -0700
Sender: owner-hackers@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

>1.  Upon booting on a SuperMicro P6DNH (dual Pentium, 8 PCi Slots, etc.),
>    and having an Intel EtherPro  100B installed ``across the bridge'', one
>    gets:
>
>fxp0 <Intel EtherExpress Pro 10/100B Ethernet> rev 2 int a irq 9 on
>pci0:19
>fxp0: Ethernet address 00:a0:c9:6b:2c:e1
>chip3 <generic PCI bridge (vendor=8086 device=0960 subclass=4)> rev 1 on
>pci0:20
>:0
>pci0:20:1: Intel Corporation, device=0x1960, class=memory (misc) int a irq
>10 [n
>o driver assigned]
>Probing for devices on PCI bus 1:
>fxp1 <Intel EtherExpress Pro 10/100B Ethernet> rev 2 int a irq 10 on pci1:0
>pci_map_mem failed: device's memrange 0xff9ff000-0xff9fffff is incompatible
>with
> its bridge's memrange 0xfd200000-0xfd6fffff
>fxp1: Ethernet address 00:a0:c9:6b:8e:b6
>
>    What can I do to make this work?

   Did you verify that it actually doesn't work? From the above, the device
appears to have been mapped and attached okay.

>2.  Said machine has 256MB of RAM, another has ``only'' 128MB, etc..
>    Can I configure ONE kernel, with `options "MAXMEM=(256*1024)" ' and
>    have things work nicely, still?

   Yes.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project