From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Lior Amsalem <alior-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>
Cc: Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org>,
Ike Pan <ike.pan-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>,
Nadav Haklai <nadavh-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>,
David Marlin <dmarlin-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Yehuda Yitschak <yehuday-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>,
Tawfik Bayouk <tawfik-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>,
Dan Frazier
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Eran Ben-Avi <benavi-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>,
Leif Lindholm <leif.lindholm-5wv7dgnIgG8@public.gmane.org>,
Sebastian Hesselbarth
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Jason Cooper <jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org>,
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<devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org>,
Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
Chris Van Hoof <vanhoof-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Maen Suleiman <maen-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>,
Shadi Ammouri <shadi-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>
Subject: Re: [PATCH 5/5] arm: dts: Convert mvebu device tree files to 64 bits
Date: Thu, 21 Mar 2013 15:46:07 -0600 [thread overview]
Message-ID: <20130321214607.GC8431@obsidianresearch.com> (raw)
In-Reply-To: <EE71107DF0D1F24FA2D95041E64AB9E801A56C7B6D24-YTFUtKQQMWV5iqk/IoNZdEEOCMrvLtNR@public.gmane.org>
On Thu, Mar 21, 2013 at 11:35:21PM +0200, Lior Amsalem wrote:
> > *) It would require Linux to change the internal registers address
> > (for now the kernel relies on the bootloader). The problem is that
> > we can't do it early enough to preserve the earlyprintk
> > functionality. Maybe you have suggestions on how to achieve that?
>
> Please note that all registers and IOs are still 32bit, the 40bit
> extension is on the CPU to DRAM path (windows) only.
Ah, I did wonder, since Ezequiel's MBUS driver was the same as on
prior families. I guess it is also the case that all on board DMA and
DMA from PCI-E devices are restricted to the low 32 bits as well?
I think lots of Linux workloads will really struggle under those
conditions..
Jason
next prev parent reply other threads:[~2013-03-21 21:46 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-21 16:26 [PATCH 0/5] arm: mvebu: Enable LPAE support for Armada XP SoCs Gregory CLEMENT
[not found] ` <1363883179-1361-1-git-send-email-gregory.clement-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2013-03-21 16:26 ` [PATCH 1/5] arm: mvebu: Aligne the internal registers virtual base to support LPAE Gregory CLEMENT
2013-03-21 16:26 ` [PATCH 2/5] arm: mvebu: Select DMA_BOUNCE when LPAE is selected in Kconfig Gregory CLEMENT
2013-03-21 18:19 ` Rob Herring
2013-03-21 19:18 ` Andrew Lunn
[not found] ` <1363883179-1361-3-git-send-email-gregory.clement-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2013-03-22 11:32 ` Russell King - ARM Linux
[not found] ` <20130322113251.GB4977-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2013-03-23 19:48 ` Krzysztof Halasa
2013-03-21 16:26 ` [PATCH 3/5] arm: mvebu: Enable pj4b on LPAE compilations Gregory CLEMENT
2013-03-21 16:26 ` [PATCH 4/5] arm: dts: Add a 64 bits version of the skeleton device tree Gregory CLEMENT
2013-03-21 16:26 ` [PATCH 5/5] arm: dts: Convert mvebu device tree files to 64 bits Gregory CLEMENT
2013-03-21 17:59 ` Rob Herring
[not found] ` <514B4A79.1070501-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-03-21 19:03 ` Arnd Bergmann
2013-03-21 19:18 ` Thomas Petazzoni
2013-03-21 21:31 ` Arnd Bergmann
[not found] ` <201303212131.07629.arnd-r2nGTMty4D4@public.gmane.org>
2013-03-21 22:30 ` Sebastian Hesselbarth
2013-03-21 20:15 ` Andrew Lunn
2013-03-21 20:22 ` Thomas Petazzoni
2013-03-21 20:30 ` Jason Cooper
2013-03-21 20:37 ` Andrew Lunn
2013-03-21 21:08 ` Thomas Petazzoni
2013-03-21 21:16 ` Thomas Petazzoni
2013-03-21 20:55 ` Jason Gunthorpe
2013-03-21 21:15 ` Thomas Petazzoni
2013-03-21 21:35 ` Lior Amsalem
[not found] ` <EE71107DF0D1F24FA2D95041E64AB9E801A56C7B6D24-YTFUtKQQMWV5iqk/IoNZdEEOCMrvLtNR@public.gmane.org>
2013-03-21 21:46 ` Jason Gunthorpe [this message]
[not found] ` <20130321214607.GC8431-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-21 21:58 ` Lior Amsalem
[not found] ` <EE71107DF0D1F24FA2D95041E64AB9E801A56C7B6D25-YTFUtKQQMWV5iqk/IoNZdEEOCMrvLtNR@public.gmane.org>
2013-03-22 6:55 ` Arnd Bergmann
2013-03-21 21:41 ` Jason Gunthorpe
2013-03-21 22:26 ` Sebastian Hesselbarth
2013-03-22 9:55 ` Arnd Bergmann
[not found] ` <20130321205545.GA8358-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-21 21:25 ` Andrew Lunn
2013-03-22 6:28 ` Andrew Lunn
[not found] ` <20130322062854.GS21478-g2DYL2Zd6BY@public.gmane.org>
2013-03-22 17:43 ` Jason Gunthorpe
[not found] ` <20130322174300.GA10230-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-22 19:33 ` Arnd Bergmann
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