In message 01a401c2febe$6f3809a0$fe02a8c0@esd11 you wrote:
after two days, I still cannot boot a kernel from u-boot, 1.first I build my linux kernel by: make lubbock make oldconfig make dep make zImage 2.then I follow the README file to product uImage, arm-linux-objcopy -O binary -R .note -R .comment -S vmlinux linux.bin gzip -9 linux.bin mkimage -A arm -O linux -T kernel -C gzip -a 0xa0008000 -e 0xa0008000 -n "Linux Kernel Image" -d linux.bin.gz uImage 3.then I use u-boot to load it: =>loadb 0xa0008000 =>bootm 0xa0008000 ## Booting image at a0008000 ... Image Name: Linux Kernel Image Image Type: ARM Linux Kernel Image (gzip compressed) Data Size: 791662 Bytes = 773.1 kB Load Address: a0008000 Entry Point: a0008000
This is wrong. Load the image to RAM at a _different_ address. You overwrite your own code.
Wolfgang Denk