[U-Boot] How to use external fdt file with kernel+initramfs uimage?

[Howard, Marc]

Hi,

I can boot my (powerpc 440gx) board as a "triple" uImage (kernel +
external_initramfs + fdt) using tftp.

(external_initramfs here means an initramfs gzip'd cpio file archive
that is not linked into the kernel as one file.)

I can also load the individual components and boot via bootm.

What I can't get to work is a "double" uImage (kernel +
external_initramfs) and external fdt.  "bootm uImage_addr - fdt_addr"
panics when it attempts to mount the initramfs filesystem.  I assume
that is because bootm isn't passing the address of the initramfs to the
kernel.

So, is there a way to do this?  Is there a way to tftp the uImage and
then obtain pointers to the two file components so that bootm could be
supplied the address of the initramfs blob?

Thanks,

Marc Howard