On Fri, Nov 30, 2007 at 08:57:33AM -0600, Kumar Gala wrote: > On Nov 30, 2007, at 3:37 AM, Li Li wrote: > > If do it standard, a 256M config space, at least 256M mem space and > > 16M > > io space are needed for each PCIE controller. > > To allocate PCIE window, the window size only can be 512M or 1G. > > If we choose 1G space, two PCIE controller needs 2G space. > > We do not have 2G free physical space now. Usually, we use upper 128M > > configure space. So, we have to cut down the config space.
That decision should be made in the kernel, not the dts. > Is it possible to make the outbound window for cfg space 4k and change > the region of config space its looking at? Yes, that'd be best. > > Here is a little complex. The MPC837xE board needs a carrier board to > > extend PCIE slot. If user does not populate carrier board onto MPC837xE > > board and do PCIE scan, the system will halt. I just want to provide a > > easy way to disable the PCIe other than modify and recompile the dts. > > So I have to recompile the kernel for this case, that seems even more > painful to the user. Can we not detect if this board isn't there and > not hang? Assuming it's similar to PCI on other 83xxMDS, yes -- there's a bit in the reset control words that can be checked. We don't currently do it on any 83xx that I'm aware of, though. :-P -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
