This document:
- Booting a linux kernel with U-boot
- Minimal filesystem hierarchy
- Log in on a getty on serial port
Part 2: installing additional software
builder@beagle-build ~ % cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
...
builder@beagle-build ~ % arm-linux-gnueabihf-gcc --version
arm-linux-gnueabihf-gcc (Debian 8.3.0-2) 8.3.0
...
builder@beagle-build ~ % cat .zshrc.local
...
ARCH=arm
CROSS_COMPILE=arm-linux-gnueabihf-
...
TODO: package (for)
- build-essential
- gcc-arm-linux-gnueabihf
- bison
- flex
- bc
- libncurses-dev
- libssl-dev
- kmod (?)
- rsync (kernel headers_install)
- makeinfo (binutils)
https://archlinuxarm.org/platforms/armv7/ti/beagleboard-xm
disk label: msdos
Device Boot Size Id Type Fs
----------------------------------------------------------
/dev/mmcblk0p1 * 100M c Win95 FAT32 (LBA) FAT16
/dev/mmcblk0p2 7479M 83 Linux ext4
source: git://git.denx.de/u-boot.git
tag: v2019.10
defconfig: omap3_beagle_defconfig
u-boot
> v2019.10 throws EHCI timeouts:
TODO: biscect
EHCI timed out on TD - token=0x80008c80
EHCI timed out on TD - token=0x80008c80
EHCI timed out on TD - token=0x80008d80
EHCI timed out on TD - token=0x80008c80
EHCI timed out on TD - token=0x80008c80
Configuring the bootcommand for automatic loading of the kernel:
[*] Enable a default value for bootcmd
(fatload mmc 0:1 0x80008000 zImage;fatload mmc 0:1 0x82000000 omap3-beagle-xm.dtb;bootz 0x80008000 - 82000000) bootcmd value
With the default env
and configured bootcommand
there is no need to store/load env
so it can be disabled:
Environment --->
[*] Environment is not stored
...
[ ] Environment in a NAND device
...
make
cp {u-boot.img,MLO} /path/to/sdcard/boot/
source: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds linux.git
branch: master
defconfig: omap2plus_defconfig
master
branch is used as there has not yet been a release (5.6) since the merge of Wireguard at the time of writing.
/etc/rc.d/startup: line 13: can't create /proc/sys/kernel/hotplug: nonexistent directory
busybox's mdev
which is used in CLFS-E needs legacy hotplug support.
Device Drivers --->
Generic Driver Options --->
[*] Support for uevent helper
make
cp arch/arm/boot/{zImage,dts/omap3-beagle-xm.dtb} /path/to/sdcard/boot/
Directories and files are created per the CLFS-E handbook with the following exceptions:
the startup
init script will symlink /tmp
(tmpfs) to /var/tmp
. If /var/tmp
is a directory this will result in the link /var/tmp/tmp
on first startup and
ln: failed to create symbolic link '/var/tmp/tmp': File exists
on the second start. Therefore skip creating /var/tmp
.
Fetching raw data from IANA with the gawk
scripts provided by the iana-etc
package results in HTTP errors
Status 403 Forbidden: User-Agent required. Contact [email protected] with questions.
Prebuilt files from the netbase
debian package are used instead.
cp /etc/{services,protocols} /path/to/targetfs/etc/
source: git://git.busybox.net/busybox
branch: master
defconfig: defconfig
Settings --->
[*] Build static binary (no shared libs)
make install
cp -r _install/* /path/to/targetfs/
source: https://github.com/cross-lfs/bootscripts-embedded.git
branch: master
make DESTDIR=/path/to/targetfs install-bootscripts