On Thu, 2013-05-30 at 17:40 -0700, wolfking wrote: > hi, scott: > Thanks for replying! > > In what specific way does it not work? > when I use iowrite8 to write, things seem OK, the codes continue running, > when I use ioread8 to read, the console I use freezes. The console stops > responding. > > Why can't it succeed? Is there nothing mapped at 0xfc7fc000? > My PCIe card's local bus register is at BAR0+0xC7, so the driver should > access 0xfc7fc027 and the following 7 bytes. But When I access the areas: > ioread8 just freezes.
That looks more like a HW error to me unless you are hitting completely the wrong system addresses. What would be useful would be to add printk's to check what exact physical address pci_iomap ends up using and whether that matches to the iobase_phys of the PCI bridge + the BAR value of the card. Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
