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| − | The | + | The [http://www.hardkernel.com/renewal_2011/products/prdt_info.php| ODROID U2 ] is an ARM development board, featuring a 1.7 GHz quad-core CPU (ARMv7a). This document contains notes about installing Funtoo Linux on this device. |
| + | == Preliminary discussion == | ||
| + | |||
| + | The ODROID-U2 needs u-boot as a bootloader, and at the time of writing this document, the required sources are not available. Some forum posts seem to indicate that they were once available, but other posts say that it never worked. | ||
| + | |||
| + | Some distributions (Ubuntu for example) already have SD-card images for the U2. This means that somebody has (or had) found the necessary information. To keep tracks, the last section will show how a working Ubuntu SD-card image has been used to bootstrap this Funtoo installation. The other sections will be edited after a better solution is found. | ||
| + | |||
| + | {{fancywarning|The following sections contain a quite unusual way of getting Funtoo installed, but will be updated when missing software is available.}} | ||
== Micro-SD Card Preparation == | == Micro-SD Card Preparation == | ||
| − | + | As there is missing software from upstream, we need to start with a SD-card image containing the bootloader (u-boot), and a boot partition containing the files that are required at boot-time. To do this, we started with an Ubuntu SD-card for the ODROID-U2 (see the last section for details). | |
| − | + | First, download the [http://ftp.osuosl.org/pub/funtoo/distfiles/odroid_u2_uboot_and_boot_partition-2013-01-17.img.gz u-boot and boot partition image]. | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | Then, extract it and copy it over your SD-card (we will use '''/dev/sdb''' for the rest of this document, '''adjust as needed'''). | |
| − | /dev/ | + | |
| − | /dev/ | + | <console> |
| − | /dev/ | + | # ##i##gunzip odroid_u2_uboot_and_boot_partition-2013-01-17.img.gz |
| + | # ##i##dd if=odroid_u2_uboot_and_boot_partition-2013-01-17.img of=/dev/sdb | ||
| + | </console> | ||
| + | |||
| + | You should now have the following partition schema: | ||
| + | |||
| + | <console> | ||
| + | # ##i## cfdisk -P s /dev/sdb | ||
| + | </console> | ||
| + | |||
| + | <pre> | ||
| + | Partition Table for /dev/sdb | ||
| + | First Last | ||
| + | # Type Sector Sector Offset Length Filesystem Type (ID) Flag | ||
| + | -- ------- ----------- ----------- ------ ----------- -------------------- ---- | ||
| + | Pri/Log 0 3071* 0# 3072*Free Space None | ||
| + | 1 Primary 3072* 68607* 0 65536*Linux (83) None | ||
| + | Pri/Log 68608* 69631* 0 1024*Free Space None | ||
| + | 2 Primary 69632* 4263935* 0 4194304*Linux (83) None | ||
| + | Pri/Log 4263936* 15661055* 0 11397120*Free Space None | ||
| + | ------------------------------------------------------------ | ||
</pre> | </pre> | ||
| − | + | {{fancywarning|The bootloader requires some of the space that is available at the beginning of the device. Don't override this free space, as it is not really "free".}} | |
| + | The boot partition /dev/sdb1 is formatted as FAT32 and contains some files. The other partition appears as the partition table has been copied, but it is not formatted. | ||
| + | Remove this partition (/dev/sdb2) and add other partitions to fit your needs. Create a root partition as the second partition, starting at sector 69632. In the following example, there is also a 1GB swap partition at the end. | ||
| + | |||
| + | <pre> | ||
| + | Partition Table for /dev/sdb | ||
| + | First Last | ||
| + | # Type Sector Sector Offset Length Filesystem Type (ID) Flag | ||
| + | -- ------- ----------- ----------- ------ ----------- -------------------- ---- | ||
| + | Pri/Log 0 3071* 0# 3072*Free Space None | ||
| + | 1 Primary 3072* 68607* 0 65536*Linux (83) None | ||
| + | Pri/Log 68608* 69631* 0 1024*Free Space None | ||
| + | 2 Primary 69632* 13654922* 0 13585291*Linux (83) None | ||
| + | 3 Primary 13654923* 15661055* 0 2006133*Linux swap / So (82) None | ||
| + | |||
| + | ------------------------------------------------------------ | ||
| + | </pre> | ||
| + | |||
| + | <console> | ||
| + | # ##i##mkfs.ext4 /dev/sdb2 | ||
| + | # ##i##mkswap /dev/sdb3 | ||
| + | </console> | ||
== Funtoo Linux Installation == | == Funtoo Linux Installation == | ||
| − | Follow the guide from [ | + | Follow the guide from [[Funtoo Linux Installation on ARM]] to begin the installation of Funtoo on the root filesystem. Note that once you are finished, you will not be able to boot the ODROID U2 until you complete the next sections. |
| + | |||
| + | === Modules === | ||
| + | |||
| + | To be continued... | ||
| + | |||
| + | == Boot partition setup == | ||
| + | Mount the boot partition (/dev/sdb1) in /mnt/SD_root/boot (created in the last section). It should contain the following files: | ||
| + | |||
| + | <pre> | ||
| + | boot | ||
| + | ├── board.dtb | ||
| + | ├── boot | ||
| + | ├── boot-hdmi1080.scr | ||
| + | ├── boot-hdmi1080.txt | ||
| + | ├── boot-hdmi720.scr | ||
| + | ├── boot-hdmi720.txt | ||
| + | ├── boot.ini | ||
| + | ├── boot.scr | ||
| + | ├── boot.scr.orig | ||
| + | ├── boot.txt | ||
| + | ├── boot.txt.orig | ||
| + | ├── config.3.0.51 | ||
| + | ├── uInitrd.orig | ||
| + | ├── zImage | ||
| + | └── zImage.3.0.51.orig | ||
| + | </pre> | ||
| + | More information to come about how to personalize the boot process. | ||
| − | == Kernel | + | == Personalized Kernel Compilation == |
=== Cross-compiler installation === | === Cross-compiler installation === | ||
| Line 37: | Line 106: | ||
</console> | </console> | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
=== Kernel Compilation an Installation === | === Kernel Compilation an Installation === | ||
| Line 53: | Line 117: | ||
# ##i## ARCH=arm CROSS_COMPILE=/usr/bin/armv7a-hardfloat-linux-gnueabi- make -j8 (adapt depending on the number of cores available on the build machine) | # ##i## ARCH=arm CROSS_COMPILE=/usr/bin/armv7a-hardfloat-linux-gnueabi- make -j8 (adapt depending on the number of cores available on the build machine) | ||
# ##i## ARCH=arm CROSS_COMPILE=/usr/bin/armv7a-hardfloat-linux-gnueabi- make modules_install INSTALL_MOD_PATH=/mnt/SD_root | # ##i## ARCH=arm CROSS_COMPILE=/usr/bin/armv7a-hardfloat-linux-gnueabi- make modules_install INSTALL_MOD_PATH=/mnt/SD_root | ||
| + | # ##i## cp arch/arm/boot/zImage /mnt/SD_root/boot | ||
</console> | </console> | ||
| + | |||
| + | |||
| + | == Miscellaneous == | ||
| + | |||
| + | === Bootstrapping a Funtoo installation using an Gentoo SD-card Image === | ||
| + | [http://odroid.foros-phpbb.com/t2005-linaro-ubuntu-1211-for-odroid-u2|Linaro Ubuntu for ODROID-U2] is a port of Ubuntu working on the ODROID-U2. They provide a working SD-card image that already contains the necessary first bits of information (u-boot image) on the beginning of the SD-card, a fat32 boot partition with boot files, and an ext4 partition for Ubuntu root filesystem. | ||
| + | |||
| + | Using this image, kripton created [http://odroid.foros-phpbb.com/t2242-gentoo-hardfp-image-for-the-u2|Gentoo SD-card image]. We will use this image to provide a start point for Funtoo users. | ||
| + | |||
| + | We will use it to bootstrap a Funtoo installation, and try to find a better solution in the future. | ||
| + | |||
| + | 1. Download a SD-card image from [http://odroid.foros-phpbb.com/t2242-gentoo-hardfp-image-for-the-u2]. | ||
| + | 2. Extract it if it's compressed. | ||
| + | 3. Run dd if=name_of_image of=/dev/your_sd_card_device | ||
| + | |||
| + | After a while, this should give you the following partition table: | ||
| + | <pre> | ||
| + | Partition Table for /dev/sdb | ||
| + | First Last | ||
| + | # Type Sector Sector Offset Length Filesystem Type (ID) Flag | ||
| + | -- ------- ----------- ----------- ------ ----------- -------------------- ---- | ||
| + | Pri/Log 0 3071* 0# 3072*Free Space None | ||
| + | 1 Primary 3072* 68607* 0 65536*Linux (83) None | ||
| + | Pri/Log 68608* 69631* 0 1024*Free Space None | ||
| + | 2 Primary 69632* 4263935* 0 4194304*Linux (83) None | ||
| + | Pri/Log 4263936* 15661055* 0 11397120*Free Space None | ||
| + | ------------------------------------------------------------ | ||
| + | </pre> | ||
| + | |||
| + | |||
| + | To provide a starting point for a Funtoo installation, we will reuse the first 68631 sectors if this installation to extract the boot loader and the boot partition. | ||
| + | |||
| + | <console> | ||
| + | # ##i##dd if=/dev/sdb of=uboot_and_boot_partition.img bs=512 count=68631 | ||
| + | </console> | ||
| + | |||
| + | This is it! This file will be used to install Funtoo and have already u-boot and boot partition available. | ||
Revision as of 04:08, 4 February 2013
The ODROID U2 is an ARM development board, featuring a 1.7 GHz quad-core CPU (ARMv7a). This document contains notes about installing Funtoo Linux on this device.
Contents |
Preliminary discussion
The ODROID-U2 needs u-boot as a bootloader, and at the time of writing this document, the required sources are not available. Some forum posts seem to indicate that they were once available, but other posts say that it never worked.
Some distributions (Ubuntu for example) already have SD-card images for the U2. This means that somebody has (or had) found the necessary information. To keep tracks, the last section will show how a working Ubuntu SD-card image has been used to bootstrap this Funtoo installation. The other sections will be edited after a better solution is found.
The following sections contain a quite unusual way of getting Funtoo installed, but will be updated when missing software is available.
Micro-SD Card Preparation
As there is missing software from upstream, we need to start with a SD-card image containing the bootloader (u-boot), and a boot partition containing the files that are required at boot-time. To do this, we started with an Ubuntu SD-card for the ODROID-U2 (see the last section for details).
First, download the u-boot and boot partition image.
Then, extract it and copy it over your SD-card (we will use /dev/sdb for the rest of this document, adjust as needed).
# gunzip odroid_u2_uboot_and_boot_partition-2013-01-17.img.gz # dd if=odroid_u2_uboot_and_boot_partition-2013-01-17.img of=/dev/sdb
You should now have the following partition schema:
# cfdisk -P s /dev/sdb
Partition Table for /dev/sdb
First Last
# Type Sector Sector Offset Length Filesystem Type (ID) Flag
-- ------- ----------- ----------- ------ ----------- -------------------- ----
Pri/Log 0 3071* 0# 3072*Free Space None
1 Primary 3072* 68607* 0 65536*Linux (83) None
Pri/Log 68608* 69631* 0 1024*Free Space None
2 Primary 69632* 4263935* 0 4194304*Linux (83) None
Pri/Log 4263936* 15661055* 0 11397120*Free Space None
------------------------------------------------------------
The bootloader requires some of the space that is available at the beginning of the device. Don't override this free space, as it is not really "free".
The boot partition /dev/sdb1 is formatted as FAT32 and contains some files. The other partition appears as the partition table has been copied, but it is not formatted.
Remove this partition (/dev/sdb2) and add other partitions to fit your needs. Create a root partition as the second partition, starting at sector 69632. In the following example, there is also a 1GB swap partition at the end.
Partition Table for /dev/sdb
First Last
# Type Sector Sector Offset Length Filesystem Type (ID) Flag
-- ------- ----------- ----------- ------ ----------- -------------------- ----
Pri/Log 0 3071* 0# 3072*Free Space None
1 Primary 3072* 68607* 0 65536*Linux (83) None
Pri/Log 68608* 69631* 0 1024*Free Space None
2 Primary 69632* 13654922* 0 13585291*Linux (83) None
3 Primary 13654923* 15661055* 0 2006133*Linux swap / So (82) None
------------------------------------------------------------
# mkfs.ext4 /dev/sdb2 # mkswap /dev/sdb3
Funtoo Linux Installation
Follow the guide from Funtoo Linux Installation on ARM to begin the installation of Funtoo on the root filesystem. Note that once you are finished, you will not be able to boot the ODROID U2 until you complete the next sections.
Modules
To be continued...
Boot partition setup
Mount the boot partition (/dev/sdb1) in /mnt/SD_root/boot (created in the last section). It should contain the following files:
boot ├── board.dtb ├── boot ├── boot-hdmi1080.scr ├── boot-hdmi1080.txt ├── boot-hdmi720.scr ├── boot-hdmi720.txt ├── boot.ini ├── boot.scr ├── boot.scr.orig ├── boot.txt ├── boot.txt.orig ├── config.3.0.51 ├── uInitrd.orig ├── zImage └── zImage.3.0.51.orig
More information to come about how to personalize the boot process.
Personalized Kernel Compilation
Cross-compiler installation
In order to compile the Linux kernel for the ODROID U2, an ARMv7a hardfloat toolchain is needed. Install it using crossdev:
# emerge crossdev # crossdev -v -t armv7a-hardfloat-linux-gnueabi (also add -S if you want a stable toolchain)
Kernel Compilation an Installation
The kernel for the ODROID U2 can be directly compiled from the sources, given by hardkernel. Note that there are several branches (odroid-3.0.y, odroidx-3.6.y and odroid-next when this page was written), but we will stick with the default branch as it provides a defconfig for a simple start.
# cd ../odroid_u2 # git clone https://github.com/hardkernel/linux.git # cd linux # ARCH=arm make odroidu2_ubuntu_defconfig # ARCH=arm CROSS_COMPILE=/usr/bin/armv7a-hardfloat-linux-gnueabi- make -j8 (adapt depending on the number of cores available on the build machine) # ARCH=arm CROSS_COMPILE=/usr/bin/armv7a-hardfloat-linux-gnueabi- make modules_install INSTALL_MOD_PATH=/mnt/SD_root # cp arch/arm/boot/zImage /mnt/SD_root/boot
Miscellaneous
Bootstrapping a Funtoo installation using an Gentoo SD-card Image
Ubuntu for ODROID-U2 is a port of Ubuntu working on the ODROID-U2. They provide a working SD-card image that already contains the necessary first bits of information (u-boot image) on the beginning of the SD-card, a fat32 boot partition with boot files, and an ext4 partition for Ubuntu root filesystem.
Using this image, kripton created SD-card image. We will use this image to provide a start point for Funtoo users.
We will use it to bootstrap a Funtoo installation, and try to find a better solution in the future.
1. Download a SD-card image from [1]. 2. Extract it if it's compressed. 3. Run dd if=name_of_image of=/dev/your_sd_card_device
After a while, this should give you the following partition table:
Partition Table for /dev/sdb
First Last
# Type Sector Sector Offset Length Filesystem Type (ID) Flag
-- ------- ----------- ----------- ------ ----------- -------------------- ----
Pri/Log 0 3071* 0# 3072*Free Space None
1 Primary 3072* 68607* 0 65536*Linux (83) None
Pri/Log 68608* 69631* 0 1024*Free Space None
2 Primary 69632* 4263935* 0 4194304*Linux (83) None
Pri/Log 4263936* 15661055* 0 11397120*Free Space None
------------------------------------------------------------
To provide a starting point for a Funtoo installation, we will reuse the first 68631 sectors if this installation to extract the boot loader and the boot partition.
# dd if=/dev/sdb of=uboot_and_boot_partition.img bs=512 count=68631
This is it! This file will be used to install Funtoo and have already u-boot and boot partition available.
