Alpine Linux
I have tried it without the possibility with SPI Flash, so only trying to start from SD card. (I am a kernelnewbie)

Currently only the EVB RK3328 is supported on the Rockchip-site, I think that does not work:

U-boot-guide (but i think there is missing the instruction ways for rock64)

Quote:However i clone the uboot-tree:
git clone

Compile U-boot:
make CROSS_COMPILE=aarch64-linux-gnu- rock64-rk3328_defconfig
make CROSS_COMPILE=aarch64-linux-gnu-

Than i follow this instruction: (
This series allow building u-boot SPL and u-boot.itb for Rock64
board. The proprietary TPL is stil required for deploy:

 ./tools/mkimage -n rk3328 -T rksd \
   -d ./rkbin/bin/rk33/rk3328_ddr_333MHz_v1.16.bin idbloader.img
 cat ./spl/u-boot-spl.bin >> idbloader.img
 dd if=idbloader.img of=/dev/sdcard seek=64 conv=notrunc
 dd if=u-boot.itb of=/dev/sdcard seek=16384 conv=notrunc

Quote:So I did the following:
git clone
./tools/mkimage -n rk3328 -T rksd \
-d ./rkbin/bin/rk33/rk3328_ddr_333MHz_v1.16.bin idbloader.img

./tools/mkimage -n rk3328 -T rksd \
-d ./rkbin/bin/rk33/rk3328_ddr_333MHz_v1.16.bin u-boot.itb

cat ./spl/u-boot-spl.bin >> idbloader.img
dd if=idbloader.img of=/dev/sdcard seek=64 conv=notrunc
dd if=u-boot.itb of=/dev/sdcard seek=16384 conv=notrunc

BUT on there is the following instruction and I do not know what the difference is and why:
Booting from an SD card on Pine64 Rock64 (RK3328)
For Rock64 rk3328 board the following three parts are required:
TPL, SPL, and the u-boot image tree blob.

- Create TPL/SPL image
=> tools/mkimage -n rk3328 -T rksd -d tpl/u-boot-tpl.bin idbloader.img
=> cat spl/u-boot-spl.bin >> idbloader.img

- Write TPL/SPL image at 64 sector
=> sudo dd if=idbloader.img of=/dev/mmcblk0 seek=64

- Write u-boot image tree blob at 16384 sector
=> sudo dd if=u-boot.itb of=/dev/mmcblk0 seek=16384

Quote:I compiled the kernel according to the Alpinelinux manual:
apt-get -y -qq install git Please make sure you have the following options as follows
KERNEL_ONLY="yes" //compile only kernel, u-boot and other packages and not buid complete OS image
KERNEL_CONFIGURE="yes"  //to include your modules

Quote:Create boot.scr
boot.scr contains needed uboot commands for loading kernel, initrd, setting kernel parameters and booting.
To create boot.scr first make a u-boot script boot.cmd with the u-boot commands you need for booting the system:
  • setenv fdt_high ffffffff
  • setenv machid 1029
  • setenv bootargs earlyprintk /boot/vmlinuz-4.6.0-rc1-sunxi modules=loop,squashfs,sd-mod,usb-storage modloop=/boot/modloop-sunxi console=${console}
  • load mmc 0:1 0x43000000 boot/dtbs/sun8i-h3-orangepi-pc.dtb
  • load mmc 0:1 0x41000000 boot/vmlinuz-4.6.0-rc1-sunxi
  • load mmc 0:1 0x45000000 boot/initramfs-sunxi-new
  • bootz 0x41000000 0x45000000 0x43000000
Then translate this to a boot.scr by using the mkimage command
mkimage -C none -A arm -T script -d boot.cmd boot.scr

On is a good guide for step 7 (Creating Initramfs File) and 8 (Creating modloop File) from the Alpinelinux-guide. I did it that way.

Then I replaced the files and copied everything to the SD card and did all the steps. Finally it does not work, i get no signal over hdmi when I try to boot. Maybe I forgot something or did something wrong. I think u-boot or boot.scr is the problem.

I will try the following instructions, but it would be better if i could only start with SD card:

I hope somebody can do it and publish a manual. Confused

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