On Mon, Oct 24, 2011 at 7:07 PM, Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> wrote: > On Mon, Oct 24, 2011 at 07:14:04PM +0400, Antony Pavlov wrote: >> On 23 October 2011 13:29, Fabian van der Werf <fvanderwerf@xxxxxxxxx> wrote: >> >> >> >> Looks like a valid patch, I wonder that this never was a problem before. >> >> ARM should break here aswell I think. What architecture are you using? >> >> >> > >> > I am working with a pandaboard (arm cortex a9). The pandaboard has a >> > usb ethernet controller, so I need usb to boot over tftp. I guess that >> > most arm configurations don't need usb for booting, and in that case >> > you won't run into this problem. >> >> I have DUB-E100 USB Ethernet (ID 2001:3c05) connected to Toshiba AC100 >> (NVidia Tegra2 --- Cortex A9); tftp works fine without usb unaligned >> access patch. > > Works for me aswell, though the access definitely is unaligned. > Okay, I think it may be a compiler problem. The latest code sourcery compiler builds a barebox that breaks on usb. 2009q1-203 builds fine, however. In the usb code the compiler should be able to figure out that the access is unaligned from the packed structure. So I guess it should split up the access in multiple loads/stores. I will look into the binaries to confirm this. The latest compiler may be broken or maybe the default behaviour has changed because armv7 actually supports unaligned access. Fabian > Sascha > > > -- > Pengutronix e.K. | | > Industrial Linux Solutions | http://www.pengutronix.de/ | > Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | > Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | > _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
