Hi Leif, On Thu, Apr 22, 2021 at 12:13:59PM +0000, Middelschulte, Leif wrote: > Hi, > > I'm in the process of fixing up imx-kobs to support > - boot configuration dumps > - boot stream extracts/updates > on iMX6QDL using the GPMI-NAND interface, as provided by some more > "recent" kernels. > > I updated barebox on the NAND flash storage using another instance of > barebox. Now it turns out that the dbbt version used (i.e. written) by > barebox and supported by imx-kobs (as it was) is not documented in the > i.MX6 QDL reference manual. > Barebox uses[0] DBBT version 0x1000000, while the reference manual > describes (i.MX6DQRM Rev 3., section 8.5.2.4) layout version 0x1. It's stored in big endian. Just endianess swap 0x01000000 and you have your 0x00000001. > > Besides that, the reference manual apparently does not describe the > field `BBMarkerPhysicalOffsetInSpareData` at the end of the FCB > structure. Yet again, imx-kobs and barebox are reading/writing it. barebox doesn't actively sets the value to anything else than 0x0. I have no idea if and how the ROM interprets this value. Indeed the name of the field seems to be inconsistent to the reference manual. Regards, Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 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
