2022-07-18

export JTX2=~/JetsonTx2/Linux_for_Tegra


mkdir $JTX2/myspace -p
cd $JTX2/myspace 

mount_roofs ()
{
    sudo mount -v --bind /dev base/dev
    sudo mount -vt devpts devpts base/dev/pts -o gid=5,mode=620
    sudo mount -vt proc proc base/proc
    sudo mount -vt sysfs sysfs base/sys
    sudo mount -vt tmpfs tmpfs base/run
}

umount_roofs ()
{
    sudo umount base/dev/pts
    sudo umount base/proc
    sudo umount base/sys
    sudo umount base/run
    sudo umount base
}



## Alpine 不能用, 因为官方包是 deb 的
# git clone https://github.com/alpinelinux/alpine-chroot-install.git  

# sudo ./alpine-chroot-install/alpine-chroot-install \
#     -m http://mirrors.tuna.tsinghua.edu.cn/alpine \
#     -d $JTX2/rootfs \
#     -a aarch64  \
#     -p openrc

wget http://cdimage.ubuntu.com/ubuntu-base/releases/20.04/release/ubuntu-base-20.04.4-base-arm64.tar.gz
tar -pxvf ubuntu-base-20.04.4-base-arm64.tar.gz -C $JTX2/rootfs

sudo $JTX2/apply_binaries.sh

sudo rm $JTX2/rootfs/dev/random $JTX2/rootfs/dev/urandom


cd $JTX2/myspace 
sudo cp /etc/resolv.conf $JTX2/rootfs/etc/
source tools.sh 
mount_roofs
sudo chroot $JTX2/rootfs /usr/bin/bash

apt --fix-broken install

umount_roofs

sudo ./flash.sh jetson-tx2-devkit mmcblk0p1 


setenv ipaddr 192.168.31.100
setenv serverip 192.168.31.111
kernel_addr_r=80280000
tftp 80280000 zImage
tftp 80000000 tegra186-quill-p3310-1000-c03-00-dsi-hdmi-hdmi-imx274-hdmiin.dtb 
bootz 80280000 - 80000000



## 更新 kernel 分区，实际是 u-boot, linux kernel 在 /boot 分区中, 由 u-boot 引导

sudo ./flash.sh -k BMP \
    --image myspace/logo_create/jw_boot_logo/bmp.blob  jetson-tx2-devkit mmcblk0p1


grep -nr "eth0" ./

-H 显示文件名
-r 搜索子目录
-n 显示行号
-i 不区分大小写
-w 只匹配整个单词


////////////////// Ubuntu rootfs /////////////////////////

mkdir $LFS/ubuntu -p
cd $LFS/src
wget http://cdimage.ubuntu.com/ubuntu-base/releases/18.04/release/ubuntu-base-18.04.5-base-armhf.tar.gz
tar -pxf ubuntu-base-18.04.5-base-armhf.tar.gz -C $LFS/ubuntu

sudo cp /etc/resolv.conf $LFS/ubuntu/etc/

sudo mount -v --bind /dev $LFS/ubuntu/dev
sudo mount -vt devpts devpts $LFS/ubuntu/dev/pts -o gid=5,mode=620
sudo mount -vt proc proc $LFS/ubuntu/proc
sudo mount -vt sysfs sysfs $LFS/ubuntu/sys
sudo mount -vt tmpfs tmpfs $LFS/ubuntu/run

sudo chroot $LFS/ubuntu /bin/bash

////// IN CHROOT /////

apt-get update
apt-get upgrade
apt-get install net-tools dhcpcd5
apt-get install vim

apt-get install systemd

echo auto eth0 > /etc/network/interfaces
echo iface eth0 inet dhcp >> /etc/network/interfaces

////// OUT CHROOT ////

sudo umount  $LFS/ubuntu/dev/pts
sudo umount  $LFS/ubuntu/dev
sudo umount  $LFS/ubuntu/proc
sudo umount  $LFS/ubuntu/sys
sudo umount  $LFS/ubuntu/run

dd if=/dev/zero of=$LFS/dst/rootfs.img bs=1G count=2
mkfs.ext4 $LFS/dst/rootfs.img

sudo mount -o loop $LFS/dst/rootfs.img /mnt
sudo cp $LFS/ubuntu/* /mnt -r
sudo umount /mnt

qemu-system-arm                                     \
    -M vexpress-a9                                  \
    -m 512M                                         \
    -nographic                                      \
    -kernel $LFS/dst/zImage                         \
    -net nic -net user,hostfwd=tcp::10021-:22       \
    -dtb $LFS/dst/vexpress-v2p-ca9.dtb              \
    -sd $LFS/dst/rootfs.img                         \
    -append "root=/dev/mmcblk0 rw console=ttyAMA0"

mount -t sysfs sys /sys
mount -t proc proc /proc
mount -t devtmpfs udev /dev


/sbin/init -> /lib/systemd/systemd

load mmc 1:1 80280000 zImage
load mmc 1:1 80000000 suniv-f1c100s-licheepi-nano.dtb
bootz 0x60008000 - 0x61000000


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