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# CROSS-COMPILING # CROSS-COMPILING
Installing a distro for ARM. The distro is CRUX, the target is an Odroid C2. The device is appears as "_/dev/mmcblk0_" (with "_/dev/mmcblk0p1_" and "_/dev/mmcblk0p2_" as the partitions) in the target machine, but it can be seen as "_/dev/sdX_" in your x86 computer. Installing a distro for ARM. The distro is CRUX, the target is an Odroid C2. The device will appears as "_/dev/mmcblk0_" (with "_/dev/mmcblk0p1_" and "_/dev/mmcblk0p2_" as the partitions) in the target machine, but it can be seen as "_/dev/sdX_" in your x86 computer.
## TOC ## TOC
@ -15,10 +15,10 @@ Installing a distro for ARM. The distro is CRUX, the target is an Odroid C2. The
## CROSS COMPILATION TOOLS ## CROSS COMPILATION TOOLS
Installing GCC cross compilation tools (for the X86 machine, not target ARM). Includes binutils. Installing GCC cross compilation tools (for the X86 machine, not target ARM). Includes binutils.
* OPTION 1: from repository (Devuan example) * OPTION 1: From repository (Devuan example)
`sudo apt-get install gcc-arm-none-eabi` `sudo apt-get install gcc-arm-none-eabi`
* OPTION 2: proportioned by odroid * OPTION 2: Proportioned by odroid
``` ```
wget http://odroid.in/guides/ubuntu-lfs/arm-unknown-linux-gnueabi.tar.xz wget http://odroid.in/guides/ubuntu-lfs/arm-unknown-linux-gnueabi.tar.xz
tar -Jxf arm-unknown-linux-gnueabi.tar.xz tar -Jxf arm-unknown-linux-gnueabi.tar.xz
@ -28,55 +28,55 @@ Name of "_CROSS_COMPILE_" variable will change depending on the choosen option.
## PARTITIONING ## PARTITIONING
* clear the section for the bootloader * Clear the section for the bootloader
`dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=8` `dd if=/dev/zero of=/dev/sdX bs=1M count=8`
* enter fdisk * Enter fdisk
`fdisk /dev/mmcblk0` `fdisk /dev/sdX`
* help * Help
`m` `m`
* create new MBR partition table * Create new MBR partition table
`o` `o`
* create boot partition * Create boot partition
`n` `n`
* make primary partition * Make primary partition
`p` `p`
* choose partition number * Choose partition number
`1` `1`
* assign start of boot partition at the end of the bootloader space * Assign start of boot partition at the end of the bootloader space
`3073` `3073`
* assign end of boot partition * Assign end of boot partition
`+128M` `+128M`
* change display units to cylinders * Change display units to cylinders
`u` `u`
* create root partition * Create root partition
`n` `n`
* make primary partition * Make primary partition
`p` `p`
* choose partition number * Choose partition number
`2` `2`
* assign start of boot partition at the end of the bootloader space (default cylinder) * Assign start of boot partition at the end of the bootloader space (default cylinder)
`131` `131`
* assign end of boot partition (default) by pressing ENTER * Assign end of boot partition (default) by pressing ENTER
* change display units back to sectors * Change display units back to sectors
`u` `u`
* show the partitions * Show the partitions
`p` `p`
* if you agree save and exit * If you agree save and exit
`w` `w`
* if you disagree delete a partition and start from that partition * If you disagree delete a partition and start from that partition
`d` `d`
* or exit without saving * or exit without saving
`q` `q`
* Make root filesystem * Make root filesystem
`mkfs.<ROOT_FILESYSTEM> /dev/mmcblk0p2` `mkfs.<ROOT_FILESYSTEM> /dev/sdX2`
* Make boot filesystem according to supported bootloader (only "_mkfs.vfat_") * Make boot filesystem according to supported bootloader (only "_mkfs.vfat_")
`mkfs.<BOOTLOADER_FILESYSTEM> /dev/mmcblk0p1` `mkfs.<BOOTLOADER_FILESYSTEM> /dev/sdX1`
## BOOTLOADER ## BOOTLOADER
Minimum 3072 bytes free at the start of the drive and before the boot partition. Minimum 3072 bytes free at the start of the drive and before the boot partition.
* VERSION 1: compile * VERSION 1: Compile bootloader yourself
``` ```
git clone https://github.com/hardkernel/u-boot.git -b odroidc2-v2015.01 git clone https://github.com/hardkernel/u-boot.git -b odroidc2-v2015.01
cd u-boot cd u-boot
@ -85,44 +85,44 @@ make -j4
cd boot cd boot
``` ```
* VERSION 2: download and extract the binary * VERSION 2: Download and extract the binary
``` ```
wget http://odroid.in/guides/ubuntu-lfs/boot.tar.gz # http://dn.odroid.com/S905/BootLoader/ODROID-C2/c2_boot_release_ubuntu.tar.gz wget http://odroid.in/guides/ubuntu-lfs/boot.tar.gz # http://dn.odroid.com/S905/BootLoader/ODROID-C2/c2_boot_release_ubuntu.tar.gz
tar -zxvf boot.tar.xz tar -zxvf boot.tar.xz
cd boot cd boot
``` ```
* flash bootloader * Flash bootloader
``` ```
chmod +x sd_fusing.sh chmod +x sd_fusing.sh
./sd_fusing.sh /dev/sdX ./sd_fusing.sh /dev/sdX
``` ```
* notice the target is the device NOT any partition * Notice the target is the device NOT any partition
* set resolution by editing file root/boot/boot.ini * Set resolution by editing file root/boot/boot.ini
* might want to comment-out the display-autodetect option * Might want to comment-out the display-autodetect option
## MOUNTING ## MOUNTING
* mount root filesystem * Mount root filesystem
`mount /dev/mmcblk0p2 /mnt` `mount /dev/sdX2 /mnt`
* create boot directory * Create boot directory
`mkdir /mnt/boot` `mkdir /mnt/boot`
* mount boot filesystem * Mount boot filesystem
`mount /dev/mmcblk0p1 /mnt/boot` `mount /dev/sdX1 /mnt/boot`
## BOOT PARTITION ## BOOT PARTITION
Must be FAT32 and 64 MB minimum. Must be FAT32 and 64 MB minimum.
* cloning kernel repo to destination "odroidc2-kernel-folder" * Clone kernel repo to destination "odroidc2-kernel-folder"
`git clone --depth 1 --single-branch https://github.com/hardkernel/linux.git --branch odroidc2-v3.16.y odroidc2-kernel-folder` `git clone --depth 1 --single-branch https://github.com/hardkernel/linux.git --branch odroidc2-v3.16.y odroidc2-kernel-folder`
* enter destination folder * Enter destination folder
`cd odroidc2-kernel-folder` `cd odroidc2-kernel-folder`
* OPTION 1: making kernel config * OPTION 1: Make kernel config (oneliner)
`make ARCH=arm64 CROSS_COMPILE=arm-none-eabi- odroidc2_defconfig` `make ARCH=arm64 CROSS_COMPILE=arm-none-eabi- odroidc2_defconfig`
* OPTION 2: making kernel config * OPTION 2: Make kernel config
``` ```
export ARCH=arm64 export ARCH=arm64
export CROSS_COMPILE=arm-none-eabi- export CROSS_COMPILE=arm-none-eabi-
@ -150,4 +150,6 @@ make odroidc2_defconfig
Can be the rest of the disk. Can be the rest of the disk.
* Download CRUX image * Download CRUX image
`wget -c http://resources.crux-arm.nu/files/devel-test/3.3/crux-arm-rootfs-3.3-64b-RC2.tar.xz` `wget -c http://resources.crux-arm.nu/files/devel-test/3.3/crux-arm-rootfs-3.3-64b-RC2.tar.xz`
* Extract CRUX image
`aunpack crux-arm-rootfs-3.3-64b-RC2.tar.xz`