Re: PCI bus enumeration differences between Geode and ARM
From: Ten (anonymous_at_tentechnologies.com)
Date: 05/18/04
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Date: Tue, 18 May 2004 17:08:48 -0400
K.S.,
Thanks for the information. NoConfig=1 in my plarform. I found this a few
days ago but was not eager to change it because PCIConfig.c in my platform
hard codes values to some of the PCI devices (mem and IO). I thought this
might break the whole platform so I decided to reseach the problem a little
more before trying the change.
I'll give the change a try now that I have collected some more information.
Much thanks!
Nick.
"K. S. Huang" <ks_huang@AlphaNetworks.com_remove.this> wrote in message
news:%23EpWFiJPEHA.268@TK2MSFTNGP11.phx.gbl...
> PCI-based device need to be configured and dispatch rsources before they
can
> be used.
> On most x86 system, device emunration and resource dispatch is done by the
> BIOS.
> But there is no BIOS in ARM-based system, so the resource dispatch will be
> handled by the PCIBUS.DLL ot EBoot
> if the EBoot dose not dispatch the resource, it is resanable that in
OEMInit
> will get nothing.
>
> Event after booting up, the PCIbus.dll might not do the resource
dispatching
> if the
>
> [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\PCI]
> "NoConfig"=dword:1
>
> is setting to one, to enable resource dispatching by PCIBUS.DLL
> you 'll need to set the
> [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\PCI]
> "NoConfig"=dword:0
>
> And there might be another possbility, even the PCIBUS.DLL is trying to
> dispatch the resource
> but the
>
> MemBase, MemLen, IoBase and IoLen in
> [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\PCI]
> dose not setting properly, the PCIBUS.DLL will think that there is NOT
> enough resource, so that the dispatching will still be given up!
>
>
> "Ten" <anonymous@tentechnologies.com> ¼¶¼g©ó¶l¥ó·s»D
> :#n$RHdFPEHA.3328@TK2MSFTNGP09.phx.gbl...
> > Hi,
> >
> > I have a Geode based system + a custom PCI device that works like a
champ.
> > I'm now creating a new platform for an ARM based SBC. My PCI driver
> > compiles and loads on the ARM. During XXX_Init I'm using
> > DDKReg_GetWindowInfo to obtain the Memory and IO maps for the PCI
device.
> > Under the Geode, I get valid IO and Memory windows. On the ARM, I get
> empty
> > structures returned.
> >
> > I noticed that my command register is 0. On the Geode it contains 7.
Am
> I
> > supposed to write this value from the driver (in the call defined by
> > ConfigEntry, similar to the sample in gdcfg.c) or is this supposed to be
> > written by the bus enumerator? If me, why does the bus enumerator not
> > handle my device? Is there another way to configure the device?
> >
> > Here's the dump of PCI Enum on my ARM platform. My PCI device is last
in
> > the list, 0/18/0.
> >
> > Bus/Device/Function = 0/1/0, Host / PCI Bridge
> > VendorID = 0x1283, DeviceID = 0x8152, Command = 0x0006, Status =
0x2200
> > RevisionID = 0x20, ProgIf = 0x00, SubClass = 0x00, BaseClass = 0x06
> > CacheLineSize = 0x00, LatencyTimer = 0x00, HeaderType = 0x80, BIST =
> 0x00
> > BaseAddresses:
> > 0xA0000008 0xBCF00001 0x00000000 0x00000000 0x00000000
0x00000000
> > CIS = 0x00000000, SubVendorID = 0x0000, SubSystemID = 0x0000
> > ROMBaseAddress = 0x00000000
> > InterruptLine = 0x00, InterruptPin = 0x00, MinGrant = 0x00, MaxLatency
=
> > 0x00
> >
> > Bus/Device/Function = 0/15/0, Ethernet Network Controller
> > VendorID = 0x10EC, DeviceID = 0x8139, Command = 0x0007, Status =
0x0290
> > RevisionID = 0x10, ProgIf = 0x00, SubClass = 0x00, BaseClass = 0x02
> > CacheLineSize = 0x00, LatencyTimer = 0x00, HeaderType = 0x00, BIST =
> 0x00
> > BaseAddresses:
> > 0xBCE13101 0xB9001000 0x00000000 0x00000000 0x00000000
0x00000000
> > CIS = 0x00000000, SubVendorID = 0x10EC, SubSystemID = 0x8139
> > ROMBaseAddress = 0x00000000
> > InterruptLine = 0x24, InterruptPin = 0x01, MinGrant = 0x20, MaxLatency
=
> > 0x40
> >
> > Bus/Device/Function = 0/16/0, Ethernet Network Controller
> > VendorID = 0x10EC, DeviceID = 0x8139, Command = 0x0007, Status =
0x0290
> > RevisionID = 0x10, ProgIf = 0x00, SubClass = 0x00, BaseClass = 0x02
> > CacheLineSize = 0x00, LatencyTimer = 0x00, HeaderType = 0x00, BIST =
> 0x00
> > BaseAddresses:
> > 0xBCE13001 0xB9000000 0x00000000 0x00000000 0x00000000
0x00000000
> > CIS = 0x00000000, SubVendorID = 0x10EC, SubSystemID = 0x8139
> > ROMBaseAddress = 0x00000000
> > InterruptLine = 0x22, InterruptPin = 0x01, MinGrant = 0x20, MaxLatency
=
> > 0x40
> >
> > Bus/Device/Function = 0/18/0, Other Bridge
> > VendorID = 0x10B5, DeviceID = 0x9054, Command = 0x0000, Status =
0x0290
> > RevisionID = 0x0C, ProgIf = 0x00, SubClass = 0x80, BaseClass = 0x06
> > CacheLineSize = 0x00, LatencyTimer = 0x00, HeaderType = 0x00, BIST =
> 0x00
> > BaseAddresses:
> > 0x00000000 0x00000001 0x00000000 0x00000000 0x00000000
0x00000000
> > CIS = 0x00000000, SubVendorID = 0x10B5, SubSystemID = 0x9054
> > ROMBaseAddress = 0x00000000
> > InterruptLine = 0x00, InterruptPin = 0x01, MinGrant = 0x00, MaxLatency
=
> > 0x00
> >
> >
> > Thanks!
> > Nick.
> >
> >
> >
>
>
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