From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 5/5] arm: dts: Convert mvebu device tree files to 64 bits
Date: Fri, 22 Mar 2013 06:55:25 +0000 [thread overview]
Message-ID: <201303220655.25882.arnd@arndb.de> (raw)
In-Reply-To: <EE71107DF0D1F24FA2D95041E64AB9E801A56C7B6D25@IL-MB01.marvell.com>
On Thursday 21 March 2013, Lior Amsalem wrote:
> > From: Jason Gunthorpe [mailto:jgunthorpe at obsidianresearch.com]
> > Sent: Thursday, March 21, 2013 11:46 PM
> >
> > 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?
>
> Correct, that's why we sets DMABOUNCE config.
>
IIRC, DMABOUNCE does not work well in a multiplatform configuration. Have you tried
using swiotlb instead?
Arnd
next prev parent reply other threads:[~2013-03-22 6:55 UTC|newest]
Thread overview: 33+ 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
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
2013-03-22 11:32 ` Russell King - ARM Linux
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
2013-03-21 19:03 ` Arnd Bergmann
2013-03-21 19:18 ` Thomas Petazzoni
2013-03-21 21:31 ` Arnd Bergmann
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
2013-03-21 21:46 ` Jason Gunthorpe
2013-03-21 21:58 ` Lior Amsalem
2013-03-22 6:55 ` Arnd Bergmann [this message]
2013-03-21 21:41 ` Jason Gunthorpe
2013-03-21 22:26 ` Sebastian Hesselbarth
2013-03-22 9:55 ` Arnd Bergmann
2013-03-21 21:25 ` Andrew Lunn
2013-03-22 6:28 ` Andrew Lunn
2013-03-22 17:43 ` Jason Gunthorpe
2013-03-22 19:33 ` Arnd Bergmann
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