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Re: Configuration of PCI Video card on a BIOS-less board

To: Pete Popov <ppopov@mvista.com>
Subject: Re: Configuration of PCI Video card on a BIOS-less board
From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Date: Thu, 10 May 2001 19:20:54 +0200 (MET DST)
Cc: Wayne Gowcher <wgowcher@yahoo.com>, linux-mips@oss.sgi.com
In-reply-to: <3AFACBC8.DE85A67E@mvista.com>
Sender: owner-linux-mips@oss.sgi.com
On Thu, 10 May 2001, Pete Popov wrote:
> Are you really trying to assign 0xC000 0000 to the card or was that just
> an example address?  Unless your pci to memory window is such that
> there's a translation that occurs, that address is incorrect.  If the
> window is 1:1, the physical address 0xC000 0000 does not exist.  You
> need to assign the card a real physical address; if your system has 32MB
> of memory, than that address would have to be between 0 and 0x2000000. 
> (well, you can't give it address "0" because of interrupt vectors, but
> you get the point). I can point you to some examples if you have
> problems. 

If you have 32 MB of RAM and you put a PCI card at an address between 0 and
0x2000000 you'll have a problem! PCI cards must not overlap with real memory.

Gr{oetje,eeting}s,

                                                Geert

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Geert Uytterhoeven ------------- Sony Software Development Center Europe (SDCE)
Geert.Uytterhoeven@sonycom.com ------------------- Sint-Stevens-Woluwestraat 55
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