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--- en:bpi-r2pro:barebox [2022/04/12 21:44] – [testing barebox] frank
+++ en:bpi-r2pro:barebox [2023/06/08 17:06] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+====== Barebox ======
+alternative to uboot as bootloader, supports ethernet/tftp-boot (wan-port only due to missing switch driver)
+Doc: https://www.barebox.org/doc/latest/
+Git: https://git.pengutronix.de/cgit/barebox/
+Bootlin: https://elixir.bootlin.com/barebox/latest/source
+Mailinglist archive: https://lore.barebox.org/barebox/
+===== build =====
+  sudo apt install lzop
+  cp rk3568_bl31_v1.24.elf firmware/rk3568-bl31.bin
+  cp rk3568_ddr_1560MHz_v1.11.bin arch/arm/boards/rockchip-rk3568-evb/sdram-init.bin
+  cp rk3568_ddr_1560MHz_v1.11.bin arch/arm/boards/pine64-quartz64/sdram-init.bin
+  ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make rockchip_v8_defconfig
+  ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make menuconfig
+  ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make
+  #flash to sdcard
+  dd if=barebox-rk3568-bpi-r2pro.img of=/dev/sdx bs=1024 seek=32
+  #flash to emmc from running system:
+  dd if=barebox-rk3568-bpi-r2pro.img of=/dev/mmcblk1 bs=1024 seek=32
+https://github.com/frank-w/barebox-r2pro
+===== testing barebox =====
+if barebox is already flashed it can chainload another one to avoid flashing it for testing
+  bootm /mnt/tftp/barebox-rk3568-bpi-r2pro.img
+booting the barebox.bin in root failed on my board, but flashimage (images/barebox-rk3568-evb.img) works
+  ERROR: Unknown OS filetype (try -f)
+  handler failed with: Invalid argument
+[[https://www.barebox.org/doc/latest/user/barebox.html#starting-barebox|documentation]] says uboot can load it too (documentation needs to be changed, but patches posted). So i tested it with vendors uboot (2017.09)...
+barebox can be chainloaded in uboot this way:
+<code>
+=> fatload mmc 1:2 ${kernel_addr_r} barebox-dt-2nd.img
+=> fatload mmc 1:2 ${fdt_addr_r} rk3568-bpi-r2-pro.dtb
+=> booti ${kernel_addr_r} - ${fdt_addr_r}
+</code>
+using  images/barebox-dt-2nd.img and arch/arm/dts/rk3568-bpi-r2-pro.dtb
+I've noticed that network does not work if barebox is chainloaded. Network works if barebox is flashed.
+===== booting kernel =====
+==== bootloader (blspec) ====
+  boot -m sd.1
+list all conf files in folder loader/entries on mmcblk0p2. Barebox starts counting partitions from 0, linux from 1
+example of a conf for this menu
+<code>
+# cat /mnt/loader/entries/linux-gz.conf
+title           Linux GZip
+version 5.16
+options earlycon=uart8250,mmio32,0xfe660000 console=ttyS2,1500000n8
+linux           /extlinux/Image_5.16.gz
+devicetree      /extlinux/dtb_5.16
+initrd          /rootfs.cpio.lz4
+</code>
+==== manual ====
+<code>
+mount -a
+ls /mnt/sd.1/extlinux/
+bootm -o /mnt/sd.1/extlinux/dtb_5.16 /mnt/sd.1/extlinux/Image_5.16.gz
+global.bootm.oftree=/mnt/sd.1/extlinux/dtb_5.16
+global.bootm.image=/mnt/sd.1/extlinux/Image_5.16.gz
+global.bootm.initrd=/mnt/sd.1/rootfs.cpio.lz4
+global linux.bootargs.rootfs="root=/dev/mmcblk0p3"
+bootm
+</code>
+==== tftp ====
+Tftp not yet working in v1.0, i have added network changes which are working in linux,but get no traffic on eth1.
+by default it uses these filenames (defaultenv/defaultenv-2-base/boot/net):
+  * kernel (${global.user}-linux-${global.hostname}):
+    * my barebox: none-linux-bpi-r2pro
+    * upstream: none-linux-rk3568-evb
+  * fdt (${global.user}-oftree-${global.hostname}):
+    * my barebox: none-oftree-bpi-r2pro
+    * upstream: none-oftree-rk3568-evb
+  * initrd (${global.user}-initramfs-${global.hostname}):
+    * my barebox: none-initramfs-bpi-r2pro
+    * upstream: none-initramfs-rk3568-evb
+booted by default (issue dhcp and uses gateway as tftp-server) or run (here with additional bootargs like earlycon,fbcon).
+<code>
+global linux.bootargs.debug="earlycon=uart8250,mmio32,0xfe660000 earlyprintk"
+#global linux.bootargs.video="video=1920x1080-32"
+#global linux.bootargs.console="console=tty1 fbcon=map:0 drm.debug=0x7 console=ttyS2,1500000n8"
+boot net
+</code>
+another filenames can be used if defining the bootm-variables with tftp-filesystem (here with different fdt)
+  imgdir=/mnt/tftp
+  global.bootm.image=$imgdir/none-linux-bpi-r2pro
+  global.bootm.oftree=$imgdir/none-oftree-bpi-r2pro-dsa
+  #global.bootm.initrd=$imgdir/none-initramfs-bpi-r2pro
+  global linux.bootargs.rootfs="root=/dev/mmcblk0p3"
+  #echo $global.linux.bootargs.debug
+  #global.linux.bootargs.debug="earlycon=uart8250,mmio32,0xfe660000 earlyprintk"
+  #echo $global.linux.bootargs.video
+  bootm