On Sat, 2009-11-28 at 21:43 +0100, Albert Herranz wrote: > + * Prepare again the same BAT for MMU_init. > + * This allows udbg I/O to continue working after the MMU is > + * turned on for real. > + * > + * We are assuming here that exi_io_base is identity mapped. > + */ > + addr = ((unsigned long)exi_io_base) & 0xffff0000; > + setbat(1, addr, addr, 128*1024, PAGE_KERNEL_NCG);
How do you prevent that from overlapping otherwise valid kernel mappings ? You need to allocate the virtual space. For a debug thing like that, you could use the fixmap. In fact, I think we should create a fixmap entry or two always available for use by early debug. Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev