[U-Boot] bootm not taking dtb

[JR Rivers]

I am working with a powerpc embedded system where u-boot seems to be passing in a constructed fdt (or one embedded in u-boot) as opposed to one that is either passed directly to bootm or as the third image of a multi-file image.

I'm sure sure that the system is NOT using my dtb file because I modified the my linux platform file to print out the "model" and "compatible" properties of root, and they make sense, but are not the values that I pass in with my dtb.

I've tried "bootm ${kerneladdr} - ${dtbaddr}" for nfs boot, and I've constructed a multi-file uImage with kernel:initramfs:dtb.  The behavior is the same in all cases.  Is this expected behavior, and if so, is there some way to force u-boot to use my dtb file?

Thanks,

JR