On Thu, 19 Oct 2006 12:51:27 +0200, Franck Bui-Huu <vagabon.xyz@xxxxxxxxx> wrote: > > If we passed a XKPHYS address to "rd_start=" option. Bad usage :-) > > ok so testing initrd_start against PAGE_OFFSET (instead of XKPHYS) > is good check since we catch such bad usages. Do you agree ? Yes. > > It's wrong indeed. But I can not see good way to handle such terrible > > usage. So ... let's ignore it. I'm OK, are you ? > > why do we need to handle them anyway ? > > PAGE_OFFSET in XKPHYS means that the kernel runs in XKPHYS address > space. We allow at boot time kernel address to be in CKSEG0 because > we have a good reason to handle that. It allows to get a kernel > smaller and faster at compile time. > > PAGE_OFFSET in CKSEG0 means that the kernel runs in CKSEG0 address > space. This means also that kernel can't handle XKPHYS address. But > how would the kernel get addresses in XKPHYS (except user bad usages) ? Sure. No reason. Excuse me for such a bad example ;) --- Atsushi Nemoto
