Hi List, ATM I'm working on a DMA transfer from NAND to RAM of the Linux-image in my SPL.
I’m searching for the speed bottleneck of the MT29F1G16ABBHC-ET NAND-Flash on the devkit8000 (OMAP3). From the timings I set on the GPMC I calced a max. speed of around 26 MiB/s. In my measurements I have a speed of around 10 MiB/s. Here is the image of my the calculation: https://docs.google.com/leaf?id=0B_wpO5K0MQSlYTcxMWVlOGEtY2FmYy00ODMyLWE1MTUtN2ZiZGViOWVhMzYw&hl=en_US tcmd: The time for the initial read command twr: time to write the address tDn: Time for a 16bit read of Data Does anyone has an idea where the bottleneck could be? Is my calculation wrong? (ecc is done parallel to the DMA transfer). Regards Simon _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
