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Date:	Thu, 20 Mar 2014 20:04:22 +0100
From:	Geert Uytterhoeven <>
To:	Russell King - ARM Linux <>
Cc:	Arnd Bergmann <>,
	Ben Dooks <>,
	Jason Gunthorpe <>,
	Linux-sh list <>,
	"" <>,
	"" <>,
	Magnus Damm <>,
	Ben Dooks <>,
	Bjorn Helgaas <>,
	Simon Horman <>,
Subject: Re: DMABOUNCE in pci-rcar

Hi Russell,

On Thu, Mar 20, 2014 at 7:39 PM, Russell King - ARM Linux
<> wrote:
> That all said, what I find most annoying is that Ben has ignored my
> question about exactly what the nature of the limitation is on this
> platform.  My response to that is - if you're not going to do the
> curtesy of answering such a simple question, then you don't get to
> patch the kernel for this problem.

Ben did answer:
"If the window is set to 2GiB it can only access 2GiB aligned to 2GiB
 boundary, however DRAM spans a 2GiB boundary (being at 1-3GiB)"



Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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