BSP for Firefly—RK3399开发板

分区表

更新分区表方法1(烧写分区表文件)

parameter_gpt.txt内容如下

CMDLINE:
mtdparts=rk29xxnand:0x00001f40@0x00000040(loader1),0x00000080@0x00001f80(reserved1),0x00002000@0x00002000(reserved2),0x00002000@0x00004000(loader2),0x00002000@0x00006000(atf),0x00038000@0x00008000(boot:bootable),-@0x0040000(rootfs)

更新分区表方法2(uboot中操作)

更新分区表方法3(fastboot烧写,参考官网)

U-Boot 2017.09

使用ROCKCHIP官方代码

编译Uboot

build/mk-uboot.sh rk3399-firefly

或者使用54shady的代码

Firefly_RK3399_UBOOT_Usage

启动分析

启动参数涉及下面环境变量

bootcmd=run distro_bootcmd

distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done

boot_targets=mmc0 mmc1 usb0 pxe dhcp

bootcmd_mmc0=setenv devnum 0; run mmc_boot

mmc_boot=if mmc dev ${devnum}; then setenv devtype mmc; run scan_dev_for_boot_part; fi

scan_dev_for_boot_part=part list ${devtype} ${devnum} -bootable devplist; env exists devpli st || setenv devplist 1; for distro_bootpart in ${devplist}; do if fstype ${devtype} ${devn um}:${distro_bootpart} bootfstype; then run scan_dev_for_boot; fi; done

scan_dev_for_boot=echo Scanning ${devtype} ${devnum}:${distro_bootpart}...; for prefix in $ {boot_prefixes}; do run scan_dev_for_extlinux; run scan_dev_for_scripts; done;run scan_dev_ for_efi;

scan_dev_for_extlinux=if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}extlinux/ extlinux.conf; then echo Found ${prefix}extlinux/extlinux.conf; run boot_extlinux; echo SCR IPT FAILED: continuing...; fi

boot_extlinux=sysboot ${devtype} ${devnum}:${distro_bootpart} any ${scriptaddr} ${prefix}extlinux/extlinux.conf

上面环境变量最终结果

sysboot mmc 0:4 any 0x00500000 /extlinux/extlinux.conf

Kernel (4.4.16)

获取代码

编译出Image和dtb

./mk-kernel.sh

Rootfs

ROCKCHIP官方提供的linaro-rootfs.img即可,或是自己制作

Flash Image

使用rkdeveloptool烧写所有镜像

进入uboot后,写入gpt

gpt write mmc 0 $partitions

文件build/extlinux/rk3399.conf内容如下

原作者：54shady