lspci and ROM on bridge, was: [PATCH] add PCI ROMs to sysfs

[Jon Smirl]

lspci shows my AGP bridge

00:01.0 PCI bridge: Intel Corp. 82875P Processor to AGP Controller (rev
02) (prog-if 00 [Normal decode])
        Flags: bus master, 66Mhz, fast devsel, latency 64
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=64
        I/O behind bridge: 0000d000-0000dfff
        Memory behind bridge: fe900000-feafffff
        Prefetchable memory behind bridge: f0000000-f7ffffff
        Expansion ROM at 0000d000 [disabled] [size=4K]
 
It shows an expansion ROM at d000. d000 is a normal address for a ROM.
But d000 also shows as I/O behind bridge.

If I list sysfs resources, the ROM is in slot 7, not 6 which is normal
for a ROM. Is this really a ROM or a bug in lspci?

[jonsmirl@smirl 0000:00:01.0]$ cat resource
0  0x0000000000000000 0x0000000000000000 0x0000000000000000
1  0x0000000000000000 0x0000000000000000 0x0000000000000000
2  0x0000000000000000 0x0000000000000000 0x0000000000000000
3  0x0000000000000000 0x0000000000000000 0x0000000000000000
4  0x0000000000000000 0x0000000000000000 0x0000000000000000
5  0x0000000000000000 0x0000000000000000 0x0000000000000000
6  0x0000000000000000 0x0000000000000000 0x0000000000000000
7  0x000000000000d000 0x000000000000dfff 0x0000000000000100
8  0x00000000fe900000 0x00000000feafffff 0x0000000000000200
9  0x00000000f0000000 0x00000000f7ffffff 0x0000000000001200
10 0x0000000000000000 0x0000000000000000 0x0000000000000000
11 0x0000000000000000 0x0000000000000000 0x0000000000000000
[jonsmirl@smirl 0000:00:01.0]$



=====
Jon Smirl
jonsmirl@xxxxxxxxx


		
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