Just to add more: I have got kernel from this link https://eewiki.net/display/linuxonarm/BeagleBoard provided by Robert Nelson.
On Tuesday, September 1, 2015 at 1:19:53 AM UTC-7, peoliye wrote: > > Problem: I am getting "Warning: Neither atags nor dtb found" after i issue > below commands. > > # fatload mmc 0:1 0x80008000 zImage > # fatload mmc 0:1 0x81000000 omap3-beagle-xm.dtb > # bootz 0x80008000 - 0x81000000 > > > Kernel version: > VERSION = 4 > SUBLEVEL = 5 > > uboot: latest version > > Size of dtb/uboot/zimage: > -rw-rw-r-- 1 ralph ralph 62K Aug 28 16:48 omap3-beagle-xm.dtb > -rw-rw-r-- 1 ralph ralph 372K Aug 27 18:31 u-boot.img > -rwxrwxr-x 1 ralph ralph 7.2M Aug 28 16:48 zImage > > Debug information: > I debugged and looked around the kernel code and found this happens > because it couldn't find the device tree nor ATAGS. > Understandably it will not find ATAG but why it is not able to find dtb is > a mystery to me. Probably it could be overwritten > by the uncompressed kernel code? > > I am using buildroot environment for my development and if i just do > "$fatload > mmc 0:1 0x80007fc0 uImage" and boot > then kernel boots up but mmc initialization fails in the end. Probably > because of the buggy > mmc card or probably because mmc driver was not initialized to it's > default state as it couldn't > find device tree. > > I tried to use older uboot but i got "machine id doesn't match" problem. > So i downloaded latest > bootloader and it at least doesn't complain about that. > > http://permalink.gmane.org/gmane.linux.ports.arm.kernel/258992 according > to this documentation > the kernel be placed under 128MiB and it recommends that the DTB be > placed after the 128MiB boundary. I just wanted > to know the best way to debug if kernel decompression is overwriting to > dtb address space or i am > looking in the wrong direction? > > I think > http://lxr.free-electrons.com/source/arch/arm/kernel/devtree.c#L215 this > line is failing. I will add here and confirm but > by that time does anyone know what could be the problem? > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
