Yocto Project Hardware Reference BSPs README
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This file gives details about using the Yocto Project hardware reference BSPs. The machines supported can be seen in the conf/machine/ directory and are listed below. There is one per supported hardware architecture and these are primarily used to validate that the Yocto Project works on the hardware arctectures of those machines.
If you are in doubt about using Poky/OpenEmbedded/Yocto Project with your hardware, consult the documentation for your board/device.
Support for additional devices is normally added by adding BSP layers to your configuration. For more information please see the Yocto Board Support Package (BSP) Developer's Guide - documentation source is in documentation/bspguide or download the PDF from:
http://yoctoproject.org/documentation
Note that these reference BSPs use the linux-yocto kernel and in general don't pull in binary module support for the platforms. This means some device functionality may be limited compared to a 'full' BSP which may be available.
The following boards are supported by the meta-yocto-bsp layer:
For more information see the board's section below. The appropriate MACHINE variable value corresponding to the board is given in brackets.
Send pull requests, patches, comments or questions about meta-yocto-bsps to poky@lists.yoctoproject.org
Maintainers: Kevin Hao kexin.hao@windriver.com Bruce Ashfield bruce.ashfield@gmail.com
The following consumer devices are supported by the meta-yocto-bsp layer:
For more information see the device's section below. The appropriate MACHINE variable value corresponding to the device is given in brackets.
Specific Hardware Documentation
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The genericx86 and genericx86-64 MACHINE are tested on the following platforms:
Intel Xeon/Core i-Series:
Intel Atom platforms:
and is likely to work on many unlisted Atom/Core/Xeon based devices. The MACHINE type supports ethernet, wifi, sound, and Intel/vesa graphics by default in addition to common PC input devices, busses, and so on.
Depending on the device, it can boot from a traditional hard-disk, a USB device, or over the network. Writing generated images to physical media is straightforward with a caveat for USB devices. The following examples assume the target boot device is /dev/sdb, be sure to verify this and use the correct device as the following commands are run as root and are not reversable.
USB Device:
Build a live image. This image type consists of a simple filesystem without a partition table, which is suitable for USB keys, and with the default setup for the genericx86 machine, this image type is built automatically for any image you build. For example:
$ bitbake core-image-minimal
Use the "dd" utility to write the image to the raw block device. For example:
If the device fails to boot with "Boot error" displayed, or apparently stops just after the SYSLINUX version banner, it is likely the BIOS cannot understand the physical layout of the disk (or rather it expects a particular layout and cannot handle anything else). There are two possible solutions to this problem:
Change the BIOS USB Device setting to HDD mode. The label will vary by device, but the idea is to force BIOS to read the Cylinder/Head/Sector geometry from the device.
Use a ".wic" image with an EFI partition
a) With a default grub-efi bootloader:
b) Use systemd-boot instead
The Beaglebone is an ARM Cortex-A8 development board with USB, Ethernet, 2D/3D accelerated graphics, audio, serial, JTAG, and SD/MMC. The Black adds a faster CPU, more RAM, eMMC flash and a micro HDMI port. The beaglebone MACHINE is tested on the following platforms:
o Beaglebone Black A6 o Beaglebone A6 (the original "White" model)
The Beaglebone Black has eMMC, while the White does not. Pressing the USER/BOOT button when powering on will temporarily change the boot order. But for the sake of simplicity, these instructions assume you have erased the eMMC on the Black, so its boot behavior matches that of the White and boots off of SD card. To do this, issue the following commands from the u-boot prompt:
# mmc dev 1 # mmc erase 0 512
To further tailor these instructions for your board, please refer to the documentation at http://www.beagleboard.org/bone and http://www.beagleboard.org/black
From a Linux system with access to the image files perform the following steps:
Build an image. For example:
$ bitbake core-image-minimal
Use the "dd" utility to write the image to the SD card. For example:
Insert the SD card into the Beaglebone and boot the board.
The EdgeRouter Lite is part of the EdgeMax series. It is a MIPS64 router (based on the Cavium Octeon processor) with 512MB of RAM, which uses an internal USB pendrive for storage.
You will need the following:
If using NFS as part of the setup process, you will also need:
--- Preparation ---
Build an image (e.g. core-image-minimal) using "edgerouter" as the MACHINE. In the following instruction it is based on core-image-minimal. Another target may be similiar with it.
--- Booting from NFS root / kernel via TFTP ---
Load the kernel, and boot the system as follows:
Get the kernel (vmlinux) file from the tmp/deploy/images/edgerouter directory, and make them available on your TFTP server.
Connect the board's first serial port to your workstation and then start up your favourite serial terminal so that you will be able to interact with the serial console. If you don't have a favourite, picocom is suggested:
$ picocom /dev/ttyS0 -b 115200
Power up or reset the board and press a key on the terminal when prompted to get to the U-Boot command line
Set up the environment in U-Boot:
=> setenv ipaddr => setenv serverip
=> tftp tftp $loadaddr vmlinux => bootoctlinux $loadaddr coremask=0x3 root=/dev/nfs rw nfsroot=: ip=::::edgerouter:eth0:off mtdparts=phys_mapped_flash:512k(boot0),512k(boot1),64k@3072k(eeprom)
--- Booting from USB disk ---
To boot from the USB disk, you either need to remove it from the edgerouter box and populate it from another computer, or use a previously booted NFS image and populate from the edgerouter itself.
Steps:
Remove the USB disk from the edgerouter and insert it into a computer that has access to your build artifacts.
Flash the image.
Insert USB disk into the edgerouter and boot it.
Note: If you place the kernel on the ext3 partition, you must re-create the ext3 filesystem, since the factory u-boot can only handle 128 byte inodes and cannot read the partition otherwise.
These boot instructions assume that you have recreated the ext3 filesystem with 128 byte inodes, you have an updated uboot or you are running and image capable of making the filesystem on the board itself.
Boot from NFS root
Mount the USB disk partition 2 and then extract the contents of tmp/deploy/core-image-XXXX.tar.bz2 into it.
Before starting, copy core-image-minimal-xxx.tar.bz2 and vmlinux into rootfs path on your workstation.
and then,
Reboot the board and press a key on the terminal when prompted to get to the U-Boot command line:
Load the kernel and boot:
=> ext2load usb 0:2 $loadaddr boot/vmlinux => bootoctlinux $loadaddr coremask=0x3 root=/dev/sda2 rw rootwait mtdparts=phys_mapped_flash:512k(boot0),512k(boot1),64k@3072k(eeprom)