NixOS on ARM/LS1046A
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U-boot
Cross-compiling
nix-shell --cores 0 '<nixpkgs>' --arg crossSystem '(import <nixpkgs> {}).lib.systems.examples.aarch64-multiplatform' -A ubootQemuAarch64
git clone git://git.denx.de/u-boot.git
cd u-boot
git checkout v2018.03
# find available defconfigs and pick one
ls configs/ | grep ls1046
make CROSS_COMPILE=aarch64-unknown-linux-gnu- ls1046ardb_sdcard_defconfig
make CROSS_COMPILE=aarch64-unknown-linux-gnu-
Switching QSPI flash banks in u-boot
cpld reset # switch to bank0 (default boot)
cpld reset altbank # switch to bank4 (reset to boot from alternative bank)
cpld reset sd # reset to boot from SD card
Flashing u-boot to QSPI flash
tftp <uboot_image_addr> <uboot_file_name>.bin
# use alternative bank
sf probe 0:1
sf erase 100000 +$filesize
sf write <uboot_image_addr> 100000 $filesize
# boot from altbank
cpld reset altbank
It is also possible to use sf probe 0:0
to flash current bank.
Flashing u-boot to flash
Replace /dev/sdX
with correct device:
dd if=u-boot-with-spl-pbl-sd.bin of=/dev/sdX bs=512 seek=8