linux-kernel - Re: [RFC] arm: Defer lookup of machine

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Message-ID: <20110207155532.GD20795@atomide.com>
Date:	Mon, 7 Feb 2011 07:55:32 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Nicolas Pitre <nico@...xnic.net>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Catalin Marinas <catalin.marinas@....com>,
	Jeremy Kerr <jeremy.kerr@...onical.com>
Subject: Re: [RFC] arm: Defer lookup of machine_type and vet of atags to
 setup.c

* Grant Likely <grant.likely@...retlab.ca> [110112 09:48]:
> On Wed, Jan 12, 2011 at 10:25 AM, Russell King - ARM Linux
> <linux@....linux.org.uk> wrote:
> > On Wed, Jan 12, 2011 at 10:16:44AM -0700, Grant Likely wrote:
> >> On Wed, Jan 12, 2011 at 9:53 AM, Nicolas Pitre <nico@...xnic.net> wrote:
> >> > On Wed, 12 Jan 2011, Grant Likely wrote:
> >> >
> >> >> Actually it looks like the real problem is that the mmu has been
> >> >> turned on, but the virtual mappings for devices have not yet been
> >> >> established, and so the debug macros aren't using a valid address.
> >> >
> >> > A temporary virtual mapping should be there -- look for addruart in
> >> > head.S.
> >>
> >> Hi Russell and Nicolas,
> >>
> >> Oops, yes all the early debug stuff works fine.  Stupid human trick on
> >> my end, but I've sorted it out now.  Thanks for the help.  I'll have
> >> patches to post later today.
> >
> > I just hacked this up, and on Versatile (real hardware) it produces
> > the below for an invalid r1 value - and of course works for a proper r1
> > value.
> 
> Heh, that look pretty close to identical to what I was just about to send.
> 
> Acked-by: Grant Likely <grant.likely@...retlab.ca>

Tested-by: Tony Lindgren <tony@...mide.com>
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