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Date: Mon, 12 Feb 2007 18:29:07 +1100 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: Andi Kleen <ak@...e.de> Cc: Stefan Richter <stefanr@...6.in-berlin.de>, Bernhard Kaindl <bk@...e.de>, discuss@...-64.org, linux1394-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org Subject: Re: remote debugging via FireWire On Mon, 2007-02-12 at 07:49 +0100, Andi Kleen wrote: > On Sunday 11 February 2007 22:35, Benjamin Herrenschmidt wrote: > > > I'd like to have that on ppc as well, so I'd rather keep it in drivers/ > > This will need some abstraction at least -- there are some early mapping hacks > that are x86 specific right now. Either abstraction or ifdef's .. we have ioremap working very early on ppc :-) > > I agree that it doesn't need to be a module. If you can load modules, > > then you can load the full ohci driver. Thus, if it's an early thingy > > initialized by arch, it can export a special "takeover" hook that the > > proper ohci module can then call to override it (important if we start > > having an irq handler). > > > > Andi, also, how do you deal with iommu ? Not at all ? :-) > > Yes -- it's really early debugging hack mostly. It's reasonable to > let the iommu be disabled (or later a special bypass can be added for this) Ok. Ben. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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