u-boot/board/keymile/scripts/README

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debug-common-env.txt
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This file defines environment variables which are valid for powerpc boards
and for arm boards.
addramfs: add phram device for the rootfilesysten in ram
develop: for development, laod kernel via tftp and mount rootfs via NFS
nfsargs: default arguments for nfs boot
ramfs: load rootfilesystem in RAM kernel
rootfsfile: loacation of the rootfs file for ramfs
setramfspram: compute PRAM size for ramfs target
setrootfsaddr: compute rootfilesystem address for phram
tftpkernel: load a kernel with tftp into ram
tftpramfs: load rootfs with tftp into ram
debug-ppc-env.txt
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fdt_file: location of the dtb file on the tftp server
tftpfdt: load dtb file and set fdt address
debug-arm-env.txt
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tftpfdt: for arm only a dummy variable, because we have no fdt on arm