[U-Boot] uboot newbie question on booting ep405 board

[David Li]

Hi,

I am new to using uBoot and learning with a EP405 board.

The board is up with the original uBoot that comes with it. But I have
encountered some problems booting up Linux. I wonder if anyone can
give me some hint
or help what went wrong.

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.

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
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at 00000000 ...
Bad Magic Number

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.