[PATCH 5/5] arm: dts: Convert mvebu device tree files to 64 bits

On Thursday 21 March 2013, Lior Amsalem wrote:

quoted

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:

quoted

quoted

 *) 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