RedBoot> fis create -r 0x80041000 -f 0xA8730000 -l 0x000B0000 -e 0x80041000 vmlinux.bin.l7
... Erase from 0xa8730000-0xa87e0000: .............. 
Program from 0x80041000-0x80101000 at 0xa8730000: ...........V
Can't program region at 0xa87e0000: Unknown error