Hello Wolfgang Am 03.12.2010 15:47, schrieb Wolfgang Denk: >> Has anyone an explanation for this behavior? Is anyone out there having >> dcache running on an ARM926 and working usb/tftpboot? > > Many drivers have not been written to work with enabled caches.
What is the reason that special handling is needed when dcache is enabled? If a driver doesn't use any DMA there should be no need as the dcache is only enabled for the RAM and not for any memory mapped IO if I understand the code in arch/arm/lib/cache-cp15.c right. > As far as USB is concerned, you might be lucky that your system usies > a EHCI controller, so setting CONFIG_EHCI_DCACHE should help. No, only OHCI. > As for the network driver, you will probably have to figure out > yourself how to fix that. As the memory mapped network controller (SMSC9221) is not cached it shouldn't be a problem or do I miss something here? > Patches welcome. If someone can give me a little push into the right direction I will try but currently I have no idea what to do besides activating the cache right before the default "bootm" booting. Thanks a lot Matthias _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
