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AM335x
Contents
Prepare card
To make sure everything will run without problem wipe all data on the MMC:
$ sudo dd if=/dev/zero of=/dev/sdx bs=1k count=1024
Format the disk:
$ sudo fdisk /dev/sdx << __EOF__ > n > > > > > w > __EOF__
Make ext4 filesystem
$ sudo mkfs.ext4 -F -O ^metadata_csum,^64bit /dev/sdx1
NOTE: You MUST replace /dev/sdx with your device, e.g. /dev/sdc.
U-Boot
Building U-Boot
Make sure you have cross compiler:
$ arm-linux-gnueabihf-gcc --version arm-linux-gnueabihf-gcc (Debian 5.4.0-6) 5.4.0 20160609 Copyright (C) 2015 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
If you don't have run:
$ sudo apt-get install gcc-5-arm-linux-gnueabihf
Get sources:
$ git clone git://git.denx.de/u-boot.git $ cd u-boot
The patch is built against specific commit, so reset repository:
$ git reset --hard b89dfcfd926b8224edd24608065eb9bb601c0d3b
Get and apply patch:
$ wget <patch name> $ git apply <patch name>
Build image, where <board_defconfig> is am335x_olimex_som_defconfig or am335x_olimex_som_nandboot_defconfig:
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- <board_defconfig>
This will produce two files:
- MLO
- u-boot.img
Writing U-Boot
Writing to MMC
Insert your card and write MLO and u-boot.img:
$ sudo dd if=MLO of=/dev/sdx count=1 seek=1 bs=128k $ sudo dd if=u-boot.img of=/dev/sdx count=2 seek=1 bs=384k
Kernel
Building linux kernel
File system
Debian 8
Install required tools:
$ sudo apt-get install qemu-user-static debootstrap binfmt-support
Make target directory:
$ mkdir rootfs $ sudo debootstrap --arch=armhf --foreign jessie rootfs
Copy qemu and resolvonf:
$ sudo cp /usr/bin/qemu-arm-static rootfs/usr/bin/ $ sudo cp /etc/resolv.conf rootfs/etc
Go into the new file system:
$ sudo chroot rootfs
Inside the new file system do:
# export LANG=C # /debootstrap/debootstrap --second-stage
Set apt sources.list:
# cat << __EOF__ > /etc/apt/sources.list #------------------------------------------------------------------------------# # OFFICIAL DEBIAN REPOS #------------------------------------------------------------------------------#
###### Debian Main Repos deb http://ftp.bg.debian.org/debian/ jessie main contrib non-free deb-src http://ftp.bg.debian.org/debian/ jessie main contrib non-free
###### Debian Update Repos deb http://security.debian.org/ jessie/updates main contrib non-free deb http://ftp.bg.debian.org/debian/ jessie-proposed-updates main contrib non-free deb-src http://security.debian.org/ jessie/updates main contrib non-free deb-src http://ftp.bg.debian.org/debian/ jessie-proposed-updates main contrib non-free __EOF__
Note: The list is generated using this tool so feel free modify it.