> > However when I attempt to access FPGA memory my mmapping it in > > userspace the read hangs. The same happens in kernel space. Does it > > happen because FPGA memory is marked as disabled, or because FPGA > > code is doing something wrong ? > > Can you access the device in u-boot? That would possible tell you if > the HW is functioning or not. > > > Another question is what can cause PCI device memory be marked as > > disabled. > > Good question, no idea how lspci decided to print [disabled]. Take a > look at lspci source and see :)
Maybe the memory enable in the PCI command register isn't set ? If you don't have a kernel driver that sets it (by calling pci_enable_device) and u-boot doesn't set it then it's going to be off and you'll get hangs or machine checks trying to access the device... Just an idea... Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
