On Mon, Apr 18, 2016 at 01:06:37PM +0200, Alexander Graf wrote: > Hmm, this is going to get very interesting with efi_loader support. By > default we allocate memory at the highest possible free address, so payloads > will probably (unless they specify limits) have their buffers above 32bit on > this platform. If we now deny any DMA to them, we basically break I/O > access.
I'm not familiar with efi_loader, but on this platform the physical RAM is within the 32bit memory range, so I don't think a workaround is needed. And I guess probably it's the same for the other 64bit ARM SoC using this driver. BTW, I see that another driver (sunxi_mmc) also truncates the upper 32 bits of addresses on 64bit platforms. Maybe this issue should be addresses in a generic way? > Could you by any chance just use a bounce buffer? Do you have any suggestions on how to do it? Are there any primitives in u-boot to request memory from low addresses? Beniamino _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
