This is a page about TI's Cortex-A8 based; BeagleBoard.
Availability
Boards:
BeagleBoard xM at Digi-Key
Basic Requirements
- Running a recent release of Debian, Fedora or Ubuntu; without OS Virtualization Software.
- ARM Cross Compiler – Linaro: http://www.linaro.org
- Linaro Toolchain Binaries: http://www.linaro.org/downloads/
- Bootloader
- Das U-Boot – the Universal Boot Loader: http://www.denx.de/wiki/U-Boot
- Source: http://git.denx.de/?p=u-boot.git;a=summary
- Linux Kernel
- Linus's Mainline tree: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git
- ARM based rootfs
- Debian: https://www.debian.org
- Ubuntu: http://www.ubuntu.com
ARM Cross Compiler: GCC
This is a pre-built (64bit) version of Linaro GCC that runs on generic linux, sorry (32bit) x86 users, it's time to upgrade...
Download/Extract:
wget -c https://releases.linaro.org/components/toolchain/binaries/6.4-2018.05/arm-linux-gnueabihf/gcc-linaro-6.4.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz tar xf gcc-linaro-6.4.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz export CC=`pwd`/gcc-linaro-6.4.1-2018.05-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-
Test Cross Compiler:
${CC}gcc --version arm-linux-gnueabihf-gcc (Linaro GCC 6.4-2018.05) 6.4.1 20180425 [linaro-6.4-2018.05 revision 7b15d0869c096fe39603ad63dc19ab7cf035eb70] Copyright (C) 2017 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Bootloader: U-Boot
Das U-Boot – the Universal Boot Loader: http://www.denx.de/wiki/U-Boot
eewiki.net patch archive: https://github.com/eewiki/u-boot-patches
Download:
git clone https://github.com/u-boot/u-boot cd u-boot/ git checkout v2018.09-rc2 -b tmp
Patches:
wget -c https://rcn-ee.com/repos/git/u-boot-patches/v2018.09-rc2/0001-omap3_beagle-uEnv.txt-bootz-n-fixes.patch patch -p1 < 0001-omap3_beagle-uEnv.txt-bootz-n-fixes.patch
Configure and Build:
make ARCH=arm CROSS_COMPILE=${CC} distclean make ARCH=arm CROSS_COMPILE=${CC} omap3_beagle_defconfig make ARCH=arm CROSS_COMPILE=${CC}
Linux Kernel
Spectre: https://meltdownattack.com and https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability
Spectre v2 Migation requires minimal: U-Boot: v2018.07 and Kernel: v4.18.x
[ 0.047363] CPU0: Spectre v2: using BPIALL workaround
This script will build the kernel, modules, device tree binaries and copy them to the deploy directory.
Download:
git clone https://github.com/RobertCNelson/armv7-multiplatform cd armv7-multiplatform/
For v4.9.x (Longterm 4.9.x):
git checkout origin/v4.9.x -b tmp
For v4.9.x-rt (Longterm 4.9.x + Real-Time Linux):
git checkout origin/v4.9.x-rt -b tmp
For v4.14.x (Longterm 4.14.x):
git checkout origin/v4.14.x -b tmp
For v4.14.x-rt (Longterm 4.14.x + Real-Time Linux):
git checkout origin/v4.14.x-rt -b tmp
For v4.18.x (Stable):
git checkout origin/v4.18.x -b tmp
Build:
./build_kernel.sh
Root File System
Debian 9
User |
Password |
---|---|
debian |
temppwd |
root |
root |
Download:
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/debian-9.5-minimal-armhf-2018-07-30.tar.xz
Verify:
sha256sum debian-9.5-minimal-armhf-2018-07-30.tar.xz 9399d649d1ce9910bbfc745f59dc57ee0e1134f57e8cae01c8cd75a8bd9d1e1e debian-9.5-minimal-armhf-2018-07-30.tar.xz
Extract:
tar xf debian-9.5-minimal-armhf-2018-07-30.tar.xz
Ubuntu 18.04 LTS
User |
Password |
---|---|
ubuntu |
temppwd |
Download:
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/ubuntu-18.04.1-minimal-armhf-2018-07-30.tar.xz
Verify:
sha256sum ubuntu-18.04.1-minimal-armhf-2018-07-30.tar.xz 6b212ee7dd0d5c9c0af49c22cf78b63e6ad20cec641c303232fca9f21a18804c ubuntu-18.04.1-minimal-armhf-2018-07-30.tar.xz
Extract:
tar xf ubuntu-18.04.1-minimal-armhf-2018-07-30.tar.xz
Setup microSD card
For these instruction we are assuming, DISK=/dev/mmcblk0, lsblk is very useful for determining the device id.
export DISK=/dev/mmcblk0
Erase partition table/labels on microSD card:
sudo dd if=/dev/zero of=${DISK} bs=1M count=20
Create Partition Layout:
With util-linux v2.26, sfdisk was rewritten and is now based on libfdisk.
sudo sfdisk --version sfdisk from util-linux 2.27.1
sudo sfdisk ${DISK} <<-__EOF__ 1M,12M,0xE,* 13M,,,- __EOF__
sudo sfdisk --unit M ${DISK} <<-__EOF__ 1,12,0xE,* 13,,,- __EOF__
Format Partition:
for: DISK=/dev/mmcblk0 sudo mkfs.vfat -F 16 -n BOOT ${DISK}p1 sudo mkfs.ext4 -L rootfs ${DISK}p2 for: DISK=/dev/sdX sudo mkfs.vfat -F 16 -n BOOT ${DISK}1 sudo mkfs.ext4 -L rootfs ${DISK}2
Mount Partition:
On most systems these partitions may will be auto-mounted...
sudo mkdir -p /media/boot/ sudo mkdir -p /media/rootfs/ for: DISK=/dev/mmcblk0 sudo mount ${DISK}p1 /media/boot/ sudo mount ${DISK}p2 /media/rootfs/ for: DISK=/dev/sdX sudo mount ${DISK}1 /media/boot/ sudo mount ${DISK}2 /media/rootfs/
Install Bootloader
Copy MLO/u-boot.img to the boot partition
sudo cp -v ./u-boot/MLO /media/boot/ sudo cp -v ./u-boot/u-boot.img /media/boot/
Install Kernel and Root File System
To help new users, since the kernel version can change on a daily basis. The kernel building scripts listed on this page will now give you a hint of what kernel version was built.
----------------------------- Script Complete eewiki.net: [user@localhost:~$ export kernel_version=4.X.Y-Z] -----------------------------
Copy and paste that "export kernel_version=4.X.Y-Z" exactly as shown in your own build/desktop environment and hit enter to create an environment variable to be used later.
export kernel_version=4.X.Y-Z
Copy Root File System
sudo tar xfvp ./*-*-*-armhf-*/armhf-rootfs-*.tar -C /media/rootfs/ sync sudo chown root:root /media/rootfs/ sudo chmod 755 /media/rootfs/
Set uname_r in /boot/uEnv.txt
sudo sh -c "echo 'uname_r=${kernel_version}' >> /media/rootfs/boot/uEnv.txt"
Copy Kernel Image
Kernel Image:
sudo cp -v ./armv7-multiplatform/deploy/${kernel_version}.zImage /media/rootfs/boot/vmlinuz-${kernel_version}
Copy Kernel Device Tree Binaries
sudo mkdir -p /media/rootfs/boot/dtbs/${kernel_version}/ sudo tar xfv ./armv7-multiplatform/deploy/${kernel_version}-dtbs.tar.gz -C /media/rootfs/boot/dtbs/${kernel_version}/
Copy Kernel Modules
sudo tar xfv ./armv7-multiplatform/deploy/${kernel_version}-modules.tar.gz -C /media/rootfs/
File Systems Table (/etc/fstab)
sudo sh -c "echo '/dev/mmcblk0p2 / auto errors=remount-ro 0 1' >> /media/rootfs/etc/fstab" sudo sh -c "echo '/dev/mmcblk0p1 /boot/uboot auto defaults 0 2' >> /media/rootfs/etc/fstab"
Remove microSD/SD card
sync sudo umount /media/boot sudo umount /media/rootfs
Comments
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