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The ramdisk image for rockchip opensource linux.
(Chaining to real filesystem is not supported, this ramdisk image is only used to update system)


apt-get install genext2fs
sh ./

If you are using u-boot's distro supporrt, adding initrd option to extlinux.conf and copying initrd.img to your boot partition will make board booted in ramdisk.

label kernel-4.4
  kernel /zImage
  fdtdir /
  initrd /initrd.img
  append  earlyprintk console=ttyS2,115200n8 rw root=/dev/ram0 rootfstype=ext4 init=/sbin/init ramdisk_size=49152 


This ramdisk is used to update images from USB-disk or SD-card to eMMC.
It will search and execute update/ in connected USB-disk or SD-card.
Please check update/ and customize it for you board.