Hi Tom, On Mon, Nov 28, 2011 at 3:53 PM, Tom Rini <tom.r...@gmail.com> wrote: > On Mon, Nov 28, 2011 at 5:06 AM, Christian Riesch > <christian.rie...@omicron.at> wrote: >> On Sun, Nov 27, 2011 at 5:41 PM, Tom Rini <tom.r...@gmail.com> wrote: >>> On Sun, Nov 27, 2011 at 8:09 AM, Wolfgang Denk <w...@denx.de> wrote: >>>> In message <1321048618-20616-1-git-send-email-ya...@emcraft.com> you wrote: >>>>> DaVinci EMAC driver has no support for running with D-Cache enabled so >>>>> disable D-Cache on all DaVinci boards with EMAC device. >>>>> >>>>> Signed-off-by: Ilya Yanok <ya...@emcraft.com> >>>>> --- >>>>> >>>>> I can't test it on any DaVinci boards right now but my understanding >>>>> is that currently EMAC driver can't work properly with D-Cache enabled. >> >> [...] >> >>>> Why do we have to permanently disable the data cache just because the >>>> network driver is broken? USB is also broken, and probably other >>>> drivers as well. >>> >>> To be clear, the problem is that today the driver is broken (not cache >>> safe) and this series of patches fixes that problem. In doing so we >>> expose that arm926ejs doesn't have complete cache support today. >> >> What do you mean by "broken"? Is it "never working" or is it "working >> sometimes" or "not working under specific conditions"? I have a DA850 >> based board and I use the Davinci EMAC driver (CONFIG_DRIVER_TI_EMAC). >> I don't have these CONFIG_SYS_xCACHE_OFF defines in my board config >> file so I guess D-Cache is enabled. But Ethernet works fine, so what >> am I missing here? Is D-Cache disabled somewhere else? > > Today, right now? I tried a dm365evm back in August on top-of-tree > and emac didn't work until I disabled caches. I don't have day-to-day > access to that board however to confirm the current state.
Yes, right now. I did a test now with the da850evm with the current u-boot, commit 99258c34103efad3395c679256a221731d010c4b, and my recent patchset [1] applied (all my tools currently expect this patchset, so it was easier for me, but my patchset does not touch the emac driver). I did a make mrproper make da850evm_config make -s u-boot.ais flashed the u-boot.ais to SPI flash and successfully tested the Ethernet connection by loading a kernel image via tftpboot. Then I commented out the lines #define CONFIG_SYS_ICACHE_OFF #define CONFIG_SYS_DCACHE_OFF #define CONFIG_SYS_L2CACHE_OFF re-built u-boot and tried the same, the Ethernet connection still worked and I could still load the kernel image. So what am I missing here? Regards, Christian [1] http://lists.denx.de/pipermail/u-boot/2011-November/111182.html _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
