On 4/20/05, Wolfgang Denk wd@denx.de wrote:
In message 528646bc0504201254fade191@mail.gmail.com you wrote:
What specifically needs to be done to configure a kernel for use with u-boot? From the documentation I could only find references to using mkimage to prepare an image (which I've done).
You must use the raw kernel image, without the kernel bootstrap stuff. And you must make sure to pass the parameters correctly (struct bd_info). See also the FAQ at http://www.denx.de/twiki/bin/view/DULG/LinuxHangsAfterUncompressingKernel
Do you mean the bootstrap stuff that's wrapped around a vmlinux.gz to create a zImage, or do you mean arch/ppc/kernel/setup.c and others? I'm building the uImage directly from the vmlinux.gz, so I don't have any of the zImage stuff.
but it made no difference. I could not find anything in the kernel config file related to u-boot for this port. The file
This is probably the problem.
Documentation/powerpc/mpc52xx.txt in the kernel tree states that a 'make uImage' should build an image bootable by u-boot. (The Makefile simply calls mkimage for the uImage target)
This is probably not enough. At least you must make sure not to include any bootstrap stuff.
I've got weird stuff happening here now. With the same uImage I've now seen three different behavious: 1. (most frequently) get initial setup banners ("id arch", et all). Crashes w/ board reset before kernel version banner 2. locks up before printing anything 3. kernel boots fine.
It's looking more like I've got a problem with the hardware configuration on the Linux side now. Time to step through init code....
g.