/proc/pci and cpuinfo

[xcp]

I have a machine here with a discrepency on the pci information
in /proc/pci:
us  0, device  20, function  0:
    Ethernet controller: 3Com Unknown device (rev 48).
      Vendor id=10b7. Device id=7646.
      Medium devsel.  IRQ 12.  Master Capable.  Latency=32.  Min
Gnt=10.Max Lat=10.
      I/O at 0xe400 [0xe401].
      Non-prefetchable 32 bit memory at 0xdf000000 [0xdf000000].

from lspci:
00:14.0 Ethernet controller: 3Com Corporation 3cSOHO100-TX Hurricane (rev
30)

clearly /proc/pci is wrong!
kernel is 2.2.18 on a P3-450 256mb.

Also, where does Linux detect and document the L2 or L1 cache size on a
socket7 system?  On the pentium3 its in cpuinfo as cache_size, no such
value exists on my P120 system.

Thanks