PCI spec question/possible VIA quirk?

Hi, 

Can anyone tell me what the PCI specs say config registers 0x2c:0x2f 
should contain? 

------------------------lspci -x says:------------------------------
00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
00: 06 11 05 83 07 00 30 22 00 00 04 06 00 00 01 00
10: 00 00 00 00 00 00 00 00 00 01 01 00 f0 00 00 00
20: 00 f6 f0 f7 00 fc f0 fd 00 00 00 00 43 10 2f 80 <====== Here!
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0c 00
---------------------------------------------------------------------

In drivers/pci/pci.c (all 2.4.x kernels) pci_read_bridge_bases() 
is reading "mem_limit_hi" from them.  
(PCI_PREF_LIMIT_UPPER32 = 0x2c in pci.h) 

This seems to need to be 00 00 00 00 for the pci setup to work 
properly.  A non-zero value leads to the error:

"PCI: Unable to handle 64-bit address space for %s\n"

(Hacking in a line that resets mem_limit_hi to 0 seems to make 
everything work fine; without it the AGP card doesnt get set up 
correctly for accelerated modes)

Are the strange values in these registers maybe a VIA quirk?
(most of the pci devices have such values.)  

Any suggestions would be appreciated!

Duncan Haldane
(please cc: any reply to me)

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E-Mail: [e-mail]
Date: 12-Aug-2001
Time: 20:46:29

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