# This is the sample uEnv.txt file for HiFive Unleashed U-boot # The current convention (SUBJECT TO CHANGE) is that this file # will be loaded from the first MSDOS(fat) GPT partition on the # MMC card. # for debugging boot bootargs=video=640x480 console=ttySI0 root=/dev/mmcblk0p2 rootwait # for normal boot #bootargs=video=640x480 root=/dev/mmcblk0p2 rootwait # To boot from partition 2 of an NVME drive (with a PCI iofpga, # such as the MicroSemi expansion board, uncomment below: #bootargs=debug console=tty0 console=ttySIF0 root=/dev/nvme0n1p2 # to boot an initramfs (buildroot or debian/etc) use this #setupchosen=run setupvml; run setupird # to boot with straight to the root= parition, uncomment below # so we do not set the ramdisk pointers #setupchosen=run setupvml setupchosen=run setupird # The FIT file to boot from fitfile=hifiveu.fit # The rest of this is mostly of interest to u-boot developers # below much match what's in FIT (ugha) bbladdr=80000000 fdtaddr=81f00000 vmladdr=80200000 irdaddr=82000000 # oh the hack.. use a large size.. ugh irdsize=01000000 vmlsize=00800000 newfdt=f0000000 # Use the FDT in the FIT image.. #setupfdt1=fdt addr ${fdtaddr}; fdt resize; fdt chosen; fdt move ${fdtaddr} ${newfdt} #use FDT that came with uboot #setupfdt1=fdt addr ${newfdt}; fdt resize; fdt chosen; fdt move ${fdtaddr} ${newfdt} #Use fit image, but don't call fdt move (TODO: understand later) setupfdt1=fdt addr ${newfdt}; fdt resize; fdt chosen setupird=setexpr irdend ${irdaddr} + ${irdsize}; fdt set /chosen linux,initrd-start <0x0 0x${irdaddr}>; fdt set /chosen linux,initrd-end <0x0 0x${irdend}> setupvml=setexpr vmlend ${vmladdr} + ${vmlsize}; fdt set /chosen riscv,kernel-start <0x0 0x${vmladdr}>; fdt set /chosen riscv,kernel-end <0x0 0x${vmlend}> #setupfdt2=fdt set /chosen bootargs ${bootargs}; fdt print /chosen setupfdt2=fdt print /chosen; fdt set /chosen bootargs "${bootargs}"; fdt set /firmware uboot,ver ${ver}; fdt print /chosen bootwait=setenv _delay ${bootdelay}; echo ${_delay}; while test ${_delay} > 0; do sleep 1; setexpr _delay ${_delay} - 1; echo ${_delay}; done # this assumes ${fileaddr} is already set!! boot2=fatload mmc 0:1 ${fileaddr} ${fitfile}; bootm start ${fileaddr}; run setupfdt1; run setupchosen; run setupfdt2; bootm loados ${fileaddr}; echo "Booting kernel in"; run bootwait; go 80000000 # if you want to network boot, for testing, uncomment the following: #boot2=dhcp; env import -t ${fileaddr} ${filesize}; run boot2