RE: [LinuxBIOS] PCI Express add-on cards and Expansion Roms

[Lu, Yinghai]

option rom purposes
1. patch chip bugs
2. installed BIOS call, so OS can boot from SCSI...
3. PXE boot from network...
4. Some UO for setup.
5. VGA card, init ....

So depend what card that you are going to use.

YH

-----Original Message-----
From: [e-mail] on behalf of [e-mail]
Sent: Wed 8/31/2005 12:13 PM
To: [e-mail]
Subject: [LinuxBIOS] PCI Express add-on cards and Expansion Roms

Hello All,

I am trying to work on getting a PCI-E card working and came across an error that I am wondering if I need to worry about.  Below shows that the VGA ROM is loading, but not the ROM from the PCI-E card (at the bottom).  Both of these cards are in slots and not onboard.  The PCI-E card is an Ethernet card.  As the device is getting a bus and resources seemingly just fine, I would think that the ROM would have been found.  My question is ... do all add-on cards need to load an expansion ROM or can they run just fine without it?  The error in question is "Incorrect Expansion ROM Header Signature ffff".

FYI on devices:

00:01.0 is the PCI-PCI bridge

02:06.0 is the VGA card on the PCI-PCI bridge

00:02.0 is the PCI-E bridge

04:00.0 is the ethernet card on the PCI-E bridge

PCI: 00:01.0 1c <- [0x0000001000 - 0x0000001fff] bus 2 io

PCI: 00:01.0 20 <- [0x00fc000000 - 0x00fdffffff] bus 2 mem

PCI: 02:06.0 10 <- [0x00fc000000 - 0x00fcffffff] mem

PCI: 02:06.0 14 <- [0x0000001000 - 0x00000010ff] io

PCI: 02:06.0 30 <- [0x00fd000000 - 0x00fdffffff] rom

PCI: 00:02.0 1c <- [0x0000002000 - 0x0000002fff] bus 4 io

PCI: 00:02.0 20 <- [0x00fe000000 - 0x00fe0fffff] bus 4 mem

PCI: 04:00.0 10 <- [0x00fe020000 - 0x00fe023fff] mem

PCI: 04:00.0 18 <- [0x0000002000 - 0x00000020ff] io

PCI: 04:00.0 30 <- [0x00fe000000 - 0x00fe01ffff] rom

PCI: 00:01.0 bridge ctrl <- 000b

PCI: 00:01.0 cmd <- 147

PCI: 02:06.0 cmd <- 143

PCI: 00:02.0 bridge ctrl <- 0007

PCI: 00:02.0 cmd <- 547

PCI: 04:00.0 cmd <- 143

PCI: 02:06.0 init

rom address for PCI: 02:06.0 = fd000000

Class Code mismatch ROM 00000003, dev 00030000

copying VGA ROM Image from fd000000 to c0000, 8000 bytes

halt_sys: file /home/vanecp/design/freebios2-3/src/devices/emulator/x86emu/ops.c

, line 4400

PCI: 04:00.0 init

rom address for PCI: 04:00.0 = fe000000

Incorrect Expansion ROM Header Signature ffff

Devices initialized

Cheers,
Peter Van Echaute