On Mon, Apr 07, 2003 at 03:01:59PM +0000, Erik J. Green wrote: > I am unable to arrange my addresses similarly neatly, mostly I think due to > fighting with the toolchain I have. Is it "legal" for me to load a > kernel using the xkphys address and then do something like: You may map the kernel into XKSEG (0xc000000000000000). The kernel already has an option for that, CONFIG_MAPPED_KERNEL. It's used as a ccNUMA optimization on large Origin configurations to map a local copy of the kernel code to that address range. Ralf