BeagleBone Black with Gentoo Linux

Step-by-step https://wiki.gentoo.org/wiki/BeagleBone_Black

另一個別人準備好的一系列腳本 https://github.com/jcpetkovich/beaglebone-black-gentoo

以下內容，不分Beaglebone Green / Beaglebone Black

1.你需要先準備Gentoo linux的環境 

後段安裝xwindow 可忽略

reference  The Gentoo Linux Installation Guide | Part 1、The Gentoo Linux Installation Guide | Part 2、The Gentoo Linux Installation Guide | Part 3

2.準備toolchain

emerge --ask dev-vcs/git sys-devel/crossdev sys-fs/dosfstools app-arch/lzop

Create an overlay for crossdev

mkdir -p /usr/local/portage/{metadata,profiles} echo "local_overlay" > /usr/local/portage/profiles/repo_name echo "masters = gentoo" > /usr/local/portage/metadata/layout.conf chown -R portage:portage /usr/local/portage

Edit /etc/portage/make.conf

file

PORTDIR_OVERLAY="/usr/local/portage"

build cross compiler

crossdev -S -P -v -t armv7a-hardfloat-linux-gnueabihf #test armv7a-hardfloat-linux-gnueabihf-gcc --version

3.build u-boot 

# I used u-boot-2016.07 wget ftp://ftp.denx.de/pub/u-boot/u-boot-2016.07.tar.bz2 tar xjpf u-boot-latest.tar.bz2 cd /home/u-boot-* # check configs file ls ./configs | grep am335x make ARCH=arm CROSS_COMPILE=armv7a-hardfloat-linux-gnueabihf- am335x_boneblack_defconfig make ARCH=arm CROSS_COMPILE=armv7a-hardfloat-linux-gnueabihf- # install mkimage to make uImage later install tools/mkimage /usr/local/bin

4.build image

# I follow blog to choose 3.14 git clone -b 3.14 --single-branch https://github.com/beagleboard/linux.git cd /home/linux # check version cat Makefile | head make ARCH=arm CROSS_COMPILE=armv7a-hardfloat-linux-gnueabihf- bb.org_defconfig # If you want disable/enable something make ARCH=arm CROSS_COMPILE=armv7a-hardfloat-linux-gnueabihf- menuconfig make ARCH=arm CROSS_COMPILE=armv7a-hardfloat-linux-gnueabihf- make ARCH=arm CROSS_COMPILE=armv7a-hardfloat-linux-gnueabihf- uImage dtbs LOADADDR=0x82000000 mkdir /home/linux_modules make ARCH=arm CROSS_COMPILE=armv7a-hardfloat-linux-gnueabihf- INSTALL_MOD_PATH=../linux_modules modules_install

5.grab file system

links https://www.gentoo.org/downloads/mirrors # Find Downloads page # Find something like "Stage 3 ARMv7a | HardFP 2016-05-23 218 MiB" # After finishing , ctrl+c back to bash # grab portage wget http://distfiles.gentoo.org/snapshots/portage-latest.tar.bz2 mkdir /home/bbb mkdir /home/bbb/deploy tar xjpf stage3-armv7a_hardfp-20160523.tar.bz2 -C /home/bbb/deploy tar xjpf portage-latest.tar.bz2 -C /home/bbb/deploy/usr/

6.copy file

cp /home/linux/arch/arm/boot/uImage /home/bbb/deploy/boot cp /home/linux/arch/arm/boot/zImage /home/bbb/deploy/boot cp /home/linux/arch/arm/boot/dts/am335x-boneblack.dtb /home/bbb/deploy/boot cp -r /home/linux_modules/lib/modules /home/bbb/deploy/lib mkdir /home/bbb/deploy/boot/uboot

若要支援Beaglebone Green，需要放入 am335x-bonegreen.dtb

7.config system

edit /homebbb/deploy/etc/fstab

file

/dev/mmcblk0p2      /           ext4            noatime,errors=remount-ro   0 1 /dev/mmcblk0p1      /boot/uboot auto            noatime                     1 2

設定 root password

openssl passwd -1 -salt xyz "passwd" # copy hash code to /home/bbb/deploy/etc/shadow inside root password

enable ssh 

ln -sf /etc/init.d/sshd /home/bbb/deploy/etc/runlevels/default

edit /home/bbb/deploy/etc/ssh/sshd_config

file

PermitRootLogin yes PasswordAuthentication yes

因為沒有安裝dhcpcd , 要設定static ip (可跳到步驟10安裝dhcpcd)

edit  /home/bbb/deploy/etc/conf.d/net

file

#config_eth0="<your IP> netmask <your netmask> brd <network broadcast IP>" config_eth0="192.168.100.5 netmask 255.255.255.0 brd 192.168.100.255" #routes_eth0="default via <your router IP>" routes_eth0="default via 192.168.100.1" #dns_servers_eth0="<nameserver IP> <another nameserver IP>" dns_servers_eth0=""

設定網卡 eth0

cd /home/bbb/deploy/etc/init.d ln -s net.lo net.eth0 cd /home/bbb/deploy/etc/runlevels/default ln -s /etc/init.d/net.eth0

replace hwclock with swclock

cd /home/bbb/deploy/etc/runlevels/boot unlink hwclock ln -s /etc/init.d/swclock .

.設定時區 

echo "Asia/Taipei" > ./bbb/deploy/etc/timezone

.設定hostname

edit /home/bbb/deploy/etc/conf.d/hostname

file

hostname="beaglebone-gentoo"

8.打包

cd /home/bbb/deploy tar cvzpf ../deploy.tar.gz .

format microSD & copy file to microSD

mkdir /mnt/sdcard ./mksd-am335x.sh /dev/sdb /home/u-boot-2014.07/MLO u-boot-2014.07/u-boot.img /home/linux/arch/arm/boot/uImage /home/bbb/deploy.tar.gz

note1 因為原腳本sfdisk指令無效 http://unix.stackexchange.com/questions/242124/sfdisk-doesnt-work-anymore , 修改過sfdisk那段

note2 雖然/home/linux/arch/arm/boot/uImage 在這邊沒有作用 , 但我沒刻意修改這部分 

note3 如果出現 bad interpreter: No such file or directory , 請emerge --ask dos2unix 下載tool , 接著輸入 dos2unix mksd-am335x.sh 將檔案轉換

mksd-am335x.sh

#!/bin/bash if [[ -z $1 || -z $2 || -z $3 || -z $4 ]] then     echo "mksd-am335x Usage:"     echo "  mksd-am335x <device> <MLO> <u-boot.img> <uImage> <rootfs tar.gz >"     echo "  Example: mksd-am335x /dev/sdc MLO u-boot.img uImage nfs.tar.gz"     exit fi if ! [[ -e $2 ]] then     echo "Incorrect MLO location!"     exit fi if ! [[ -e $3 ]] then     echo "Incorrect u-boot.img location!"     exit fi if ! [[ -e $4 ]] then     echo "Incorrect uImage location!"     exit fi if ! [[ -e $5 ]] then     echo "Incorrect rootfs location!"     exit fi echo "All data on "$1" now will be destroyed! Continue? [y/n]" read ans if ! [ $ans == 'y' ] then     exit fi echo "[Partitioning $1...]" DRIVE=$1 dd if=/dev/zero of=$DRIVE bs=1024 count=1024        SIZE=`fdisk -l $DRIVE | grep Disk | awk '{print $5}'`        #echo DISK SIZE - $SIZE bytes #echo CYLINDERS - $CYLINDERS #{ #echo ,9,0x0C,* #echo ,,,- #} | sfdisk -D -H 255 -S 63 -C $CYLINDERS $DRIVE    wipefs --all $DRIVE { echo ",$((9*63*255)),0x0c,*" echo ",,,-" } | sfdisk $DRIVE echo "[Making filesystems...]" mkfs.vfat -F 32 -n boot "$1"1 &> /dev/null # the "-T small" is so I have enough inodes for portage mkfs.ext4 -L rootfs -T small "$1"2 &> /dev/null echo "[Copying files...]" mount "$1"1 /mnt/sdcard cp $2 /mnt/sdcard/MLO cp $3 /mnt/sdcard/u-boot.img umount "$1"1 mount "$1"2 /mnt/sdcard tar zxvf $5 -C /mnt/sdcard chmod 755 /mnt/sdcard umount "$1"2 echo "[Done]"

9. boot from microSD

SD卡插入 , 按住靠近SD卡插槽的按鈕 , 啟動電源 , 等LED亮即可放開手

 10. 在host PC新增package到target arm(以dhcpcd為例)

#cross build package and save into /usr/armv7a-hardfloat-linux-gnueabihf/package armv7a-hardfloat-linux-gnueabihf-emerge --buildpkg --oneshot net-misc/dhcpcd # 切換到bbb的filesystem路徑 cd /home/bbb/deploy #install package ROOT=$PWD/ armv7a-hardfloat-linux-gnueabihf-emerge --ask --usepkgonly --oneshot net-misc/dhcpcd #enable dhcpcd ln -sf /etc/init.d/dhcpcd /home/bbb/deploy/etc/runlevels/default

edit  /home/bbb/deploy/etc/conf.d/net

file

#config_eth0="<your IP> netmask <your netmask> brd <network broadcast IP>" config_eth0="dhcp" #dns_servers_eth0="<nameserver IP> <another nameserver IP>" dns_servers_eth0=""

可以安裝qemu在x86電腦上測試arm

#install qemu host side emerge --ask app-emulation/qemu #build qemu arm package QEMU_USER_TARGETS="arm" QEMU_SOFTMMU_TARGETS="arm" USE="static-user static-libs" emerge --ask --buildpkg --oneshot qemu #install qemu arm filesystem side cd /home/bbb/deploy && ROOT=$PWD/ emerge --ask --usepkgonly --oneshot --nodeps qemu #chroot to arm filesystem /etc/init.d/qemu-binfmt start && cd /home/bbb/deploy && chroot . /bin/bash --login #test dhcpcd (chroot arm) ~# dhcpcd

11. 在host PC移除target arm的package(以dhcpcd為例)

# 切換到bbb的filesystem路徑 cd /home/bbb/deploy #uninstall package ROOT=$PWD/ armv7a-hardfloat-linux-gnueabihf-emerge -C net-misc/dhcpcd