[U-Boot] 460GT PCIe configuration

[Stefan Roese <sr@denx.de>]

On Wednesday 14 January 2009, Stefan Roese wrote:
> On Wednesday 14 January 2009, vb wrote:
> > thank you for confirming my suspicions and for your suggestion, I will
> > compare notes with the Linux version (should have thought about this
> > earlier). But I also was under impression that Linux does not touch
> > some parts of PCI configuration, as the memory map is set by u-boot
> > and used by Linux. Or does linux use the addresses from the device
> > tree to reprogram the PCIe subsystem?
>
> Correct. Linux (re-)configures the 4xx PCI(e) controller completely.
> Everything should be overwritten by Linux.

BTW: Do you see the same problems (PCIe memory read timeout) under Linux?

If PCIe works on Glacier and fails on your custom board it may be a hardware 
related problem on your board (either board routing or endpoint etc). Are you 
sure that your FPGA based PCIe endpoint is working correctly? Can you "plug" 
a standard PCIe endpoint in your custom hardware?

Best regards,
Stefan

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