> From: Jason Gunthorpe [mailto:[email protected]] > 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. > > I think lots of Linux workloads will really struggle under those conditions.. > > Jason Regards, Lior Amsalem _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
