[U-Boot] mx28evk initramfs load address

Is there a preferred load address for a linux initramfs on the mx28evk board? The config defines the kernel load address as 0x42000000 and the device tree load address as 0x41000000, but I don't see an address for an initramfs.

It looks like the u-boot that comes with the i.MX28 BSP loads the initramfs at 0x40800000. That seems to work ok. If that's an acceptable value perhaps a default environment variable could be added defining it? I guess that would allow up to an 8MB initramfs before stomping on the device tree? Would there be a better location that might provide more headroom?

Thanks...