分区表
![1.jpg](//file.elecfans.com/web2/M00/66/73/poYBAGMQbumAIYizAALJc449nbc322.jpg)
更新分区表方法1(烧写分区表文件)
![1.jpg](//file.elecfans.com/web2/M00/67/0D/pYYBAGMQbvmAMYI4AAAqdBlRz8o339.jpg)
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)
![1.jpg](//file.elecfans.com/web2/M00/66/73/poYBAGMQbyKABPxRAAAtRkrF3xY392.jpg)
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
![1.jpg](//file.elecfans.com/web2/M00/67/0D/pYYBAGMQbzaANgH1AABOZIP35pM363.jpg)
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
![1.jpg](//file.elecfans.com/web2/M00/66/73/poYBAGMQb3qAdORJAAAkYuetkOU321.jpg)
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
![1.jpg](//file.elecfans.com/web2/M00/67/0D/pYYBAGMQb46AQ-64AAB73hnCXOY430.jpg)
进入uboot后,写入gpt
gpt write mmc 0 $partitions
文件build/extlinux/rk3399.conf内容如下
![1.jpg](//file.elecfans.com/web2/M00/67/0D/pYYBAGMQb6GAP9lcAABccrk-oOQ705.jpg)
原作者:54shady
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