Hi Sjoerd, On 30 March 2015 at 02:14, Sjoerd Simons <sjoerd.sim...@collabora.co.uk> wrote: > On Fri, 2015-02-27 at 22:11 -0700, Simon Glass wrote: >> Hi Sjoerd, >> >> On 25 February 2015 at 17:12, Sjoerd Simons >> <sjoerd.sim...@collabora.co.uk> wrote: >> > Hey Simon, >> > >> > Incidentally i got acces to a Nyan big and wanted to start testing >> > u-boot on it. Unfortunately putting a uImage in a vboot signed blob to >> > chainload it from the primary bootloader like on the exynos based >> > chromebooks seemed not to work. >> > >> > Do you have any good pointers how to use u-boot on nyan? (Ideally >> > without having to re-flash coreboot, as i would like to create images >> > people can easily test on a vanilla chromebook) >> >> No I don't sorry. I suppose in dev mode it should boot a signed image >> so if you put U-Boot in a FIT as with snow/pit it should work. But I >> don't have instructions...if you figure it out it would be good to put >> this info somewhere. > > Finally got time to play a bit with this. On the snow/peach boards the > approach is to put u-boot in a legacy u-boot image (not a FIT image), > which has the nice side-effect of re-locating u-boot before jumping to > it. > > Unfortunately the depthcharge on the nyan boards appears not to support > legacy images, only FIT images, which don't get relocated before jumping > into the kernel blob. Long story short, on the nyan boards the FIT image > gets loaded at 0x81000000 and the FIT images i created put the u-boot > blob at an offset of 0xCC. After re-configuring CONFIG_SYS_TEXT_BASE to > match i got u-boot starting \o/ ;) > > Unfortunately the board seems to hard hang when it tries to enable/use > the data cache. Enabling CONFIG_SYS_DCACHE_OFF makes it get to the > u-boot prompt. Unfortunately neither MMC (didn't detect card) nor USB > (failed to get descriptor from my usb network dongle) worked so i > couldn't try booting a kernel just, but it's start. > > Simon, does data cache/MMC/USB work properly when booting u-boot > "natively" rather then chainloading from coreboot or does it have > similar issues? > > Fwiw, I've attached the output of u-boot running onthe board (with > CONFIG_SYS_DCACHE_OFF enabled). >
Nice work! I have the data cache enabled. USB does not work. MMC works OK (I can boot a kernel from the internal eMMC). I'm not sure about the cache, it seems odd. I wonder if there is something broken in the cache set, and U-Boot needs to fix it? Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
