Hi Wolfgang, Thanks for the suggestions. I think I will try to upgrade the u-boot to the latest version. buildroot can also build u-boot image. I 'll look into it.
David On Sun, Apr 14, 2013 at 10:51 PM, Wolfgang Denk <w...@denx.de> wrote: > Dear David Li, > > In message > <CAADET=ejpeckxwsohp5+d7pijbbhgk1xumgtaadka-trrvr...@mail.gmail.com> you > wrote: >> >> I am new to using uBoot and learning with a EP405 board. > > Which exact board is this? > >> Basically I built the Linux uImage and device tree blob for EP 405. >> Both were downloaded on to RAM - uImage at memory 0x200000 and >> ep405.dtb at 0x4000000. > > Note that these addresses are way too low in any case. > >> When I used "bootm" to boot the >> kernel, I always get "Bad Magic Number" like this: >> >> >> => bootm 0x2000000 - 0x4000000 >> ## Booting image at 02000000 ... >> Image Name: Linux-3.7.8 >> Image Type: PowerPC Linux Kernel Image (gzip compressed) >> Data Size: 2571848 Bytes = 2.5 MB > > Even your compressed kernel is bigger than the 2 MB where you load it; > when uncompressing, it will overwrite both the tail of the UImage > itself, and the DTB. > >> ## Loading RAMDisk Image at 00000000 ... >> Bad Magic Number > > Did you now wonder why it's talking about a ramdisk here? You did not > pass a ramdisk address (at least you did not mean to). > >> U-Boot 1.2.0-gd35b508a-dirty (Sep 19 2007 - 14:13:23) >> >> What's wrong? Why it's loading ramdisk at 0000000? I built the kernel >> and initramfs together in the uImage. > > Your U-Boot is more than 6 years old; that is not only stone age, but > even long before the introduction of device tree support. You cannot > use this ancient U-Boot version to boot a recent LInux kernel with > device tree support. > > PLease update to a recent U-Boot version, or stick with Linux kernel > versions of similar age, i. e. something like v2.6.19 or v.2.6.20 > (yes, this is old crap, but so is your version of U-Boot). > > Best regards, > > Wolfgang Denk > > -- > DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel > HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany > Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de > We, the unwilling, led by the unknowing, are doing the impossible for > the ungrateful. We have done so much, for so long, with so little, we > are now qualified to do anything with nothing. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot