大家好，这篇文章，我们来分享一下，如何给Orangepi 3 LTS安装Gentoo

硬件配置

产品参数

构建可引导镜像

1. 单击Orange Pi - Orangepi下载官方镜像，本文选择debian。

2. 执行如下指令：

   dd if=<orange_img> of=/dev/sdd

   执行此命令先烧录，然后执行如下命令挂载到系统：

   sudo mount -o loop,offset=$((8192*512)) ~/下载/Orangepi3-lts_3.0.0_debian_bullseye_server_linux5.16.17.img /mnt/opipc_image

3. 执行如下命令删除sd卡的所有文件（除了引导文件外）：

   sudo rm -rf *

4. 执行如下指令拷贝rootfs：

   sudo wget https://bouncer.gentoo.org/fetch/root/all/releases/arm64/autobuilds/20220724T233143Z/stage3-arm64-openrc-20220724T233143Z.tar.xzhttps://bouncer.gentoo.org/fetch/root/all/releases/arm64/autobuilds/20220724T233143Z/stage3-arm64-openrc-20220724T233143Z.tar.xz
   sudo wget http://gentoo.aditsu.net:8000/snapshots/portage-latest.tar.xz
   sudo tar xpvf stage3-*.tar.xz --xattrs-include='*.*' --numeric-owner
   sudo tar xpvf portage-latest.tar.xz --xattrs-include='*.*' --numeric-owner -C /usr

5. 拷贝官方的引导文件：

   sudo cp -r /mnt/opipc_img/boot/* boot/

   编辑boot.cmd文件，内容如下：

   
   # DO NOT EDIT THIS FILE
   #
   # Please edit /boot/orangepiEnv.txt to set supported parameters
   #

default values

setenv load_addr "0x45000000"
setenv overlay_error "false"
setenv rootdev "/dev/mmcblk0p1"
setenv verbosity "1"
setenv rootfstype "ext4"
setenv console "both"
setenv docker_optimizations "on"
setenv bootlogo "false"

Print boot source

itest.b 0x10028 == 0x00 && echo "U-boot loaded from SD"
itest.b 0x10028 == 0x02 && echo "U-boot loaded from eMMC or secondary SD"
itest.b *0x10028 == 0x03 && echo "U-boot loaded from SPI"

echo "Boot script loaded from ${devtype}"

if test -e ${devtype} ${devnum} ${prefix}orangepiEnv.txt; then
load ${devtype} ${devnum} ${load_addr} ${prefix}orangepiEnv.txt
env import -t ${load_addr} ${filesize}
fi

if test "${console}" = "display" || test "${console}" = "both"; then setenv consoleargs "console=ttyS0,115200 console=tty1"; fi
if test "${console}" = "serial"; then setenv consoleargs "console=ttyS0,115200"; fi
if test "${bootlogo}" = "true"; then setenv consoleargs "bootsplash.bootfile=bootsplash.orangepi ${consoleargs}"; fi

get PARTUUID of first partition on SD/eMMC it was loaded from

mmc 0 is always mapped to device u-boot (2016.09+) was loaded from

if test "${devtype}" = "mmc"; then part uuid mmc 0:1 partuuid; fi

setenv bootargs "root=${rootdev} rootwait init=/sbin/init rootfstype=${rootfstype} ${consoleargs} consoleblank=0 loglevel=${verbosity} ubootpart=${partuuid} usb-storage.quirks=${usbstoragequirks} ${extraargs} ${extraboardargs} earlycon=
serial0:115200n8"

if test "${docker_optimizations}" = "on"; then setenv bootargs "${bootargs} cgroup_enable=memory swapaccount=1"; fi

load ${devtype} ${devnum} ${fdt_addr_r} ${prefix}dtb/${fdtfile}
fdt addr ${fdt_addr_r}
fdt resize 65536
for overlay_file in ${overlays}; do
if load ${devtype} ${devnum} ${load_addr} ${prefix}dtb/allwinner/overlay/${overlay_prefix}-${overlay_file}.dtbo; then
echo "Applying kernel provided DT overlay ${overlay_prefix}-${overlay_file}.dtbo"
fdt apply ${load_addr} || setenv overlay_error "true"
fi
done
for overlay_file in ${user_overlays}; do
if load ${devtype} ${devnum} ${load_addr} ${prefix}overlay-user/${overlay_file}.dtbo; then
echo "Applying user provided DT overlay ${overlay_file}.dtbo"
fdt apply ${load_addr} || setenv overlay_error "true"
fi
done
if test "${overlay_error}" = "true"; then
echo "Error applying DT overlays, restoring original DT"
load ${devtype} ${devnum} ${fdt_addr_r} ${prefix}dtb/${fdtfile}
else
if load ${devtype} ${devnum} ${load_addr} ${prefix}dtb/allwinner/overlay/${overlay_prefix}-fixup.scr; then
echo "Applying kernel provided DT fixup script (${overlay_prefix}-fixup.scr)"
source ${load_addr}
fi
if test -e ${devtype} ${devnum} ${prefix}fixup.scr; then
load ${devtype} ${devnum} ${load_addr} ${prefix}fixup.scr
echo "Applying user provided fixup script (fixup.scr)"
source ${load_addr}
fi
fi

load ${devtype} ${devnum} ${ramdisk_addr_r} ${prefix}uInitrd
load ${devtype} ${devnum} ${kernel_addr_r} ${prefix}Image

booti ${kernel_addr_r} ${ramdisk_addr_r} ${fdt_addr_r}

Recompile with:

mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr

并执行如下命令：

```bash
sudo mkimage -C none -A arm64 -T script -d boot.cmd boot.scr

执行初始化设置

执行以下命令：

ip addr add 192.168.3.200/24 dev eth0
ip link set eth0 up
ip route add 0.0.0.0/0 via 192.168.3.1
data -s '<data>' # 设置日期
data -s '<time>' # 设置时间
emerge-webrsync
emerge --sync
emerge @world --ask

此后还需要编辑inittab 以便开启串口控制台的初始化程序。

编译Gentoo Linux主线内核

现在我们还只是使用官方的引导内核，现在我们将构建自己的内核，执行如下指令：

emerge --ask gentoo-sources
emerge --ask dracut
eselect kernel set 1
cd /usr/src/linux
cp /boot/config .config
make menuconfig
make
make modules_install
mv /boot /boot.old
mkdir /boot.new
# 根据需要利用软链接切换，拷贝必要的引导文件（除了内核部分）
dracut --kver=5.15.52-gentoo

构建uInitrd

从物理机执行如下命令：

sudo mkimage -C none -A arm64 -T ramdisk -n uInitrd -d <img> uInitrd

当你建立好正确的软链接关系后，重新启动，系统正常引导说明成功

系统设置完成