BBB - Building the Linux Kernel

shabaz wrote:

 

That's great!! I'm looking forward to trying it.

I would be extremely happy with this on the BBB!!

Well I have got it working,   there's a few tweeks required and it's rather late now so will document it all tomorrow.

Oh, wow, you've made my evening. Goodnight!!

Ok this is how I got the redsleeve distro working.

First create a bootable SD card, I followed the instructions here and installed Ubuntu 12.04.2 LTS then checked it booted up and worked

When I plugged this into my desktop it appears as /dev/sdb1 and /dev/sdb2 devices. /dev/sdb2 is the one we are interested in.

Download the redsleeve root file system http://ftp.redsleeve.org/pub/yum/os/rsel6-rootfs.tar.bz2

extract with tar -xvf rsel6-rootfs.tar.bz2 and this creates a directory rsel6-rootfs containing the file system.

Mount /dev/sdb2 somewhere - on my system it auto mounted as /media/rootfs_

Now copy the kernel boot, modules and firmware into the rsel6-rootfs file system

cp -R /media/rootfs_/boot rsel6-rootfs

cp -R /media/rootfs_/lib/modules rsel6-rootfs/lib

cp -R /media/rootfs_/lib/firmware rsel6-rootfs/lib

Now make some changes to the configs.

Edit rsel6-rootfs/etc/fstab:  remove or comment out  the line for /dev/sda1 and the last two lines beginning with raiden: and change the / mount entry.

what I ended up with is this:

#---------------------

/dev/mmcblk0p2          /               ext4    noatime         1 1

devpts                  /dev/pts        devpts  gid=5,mode=620  0 0

tmpfs                   /dev/shm        tmpfs   defaults        0 0

proc                    /proc           proc    defaults        0 0

sysfs                   /sys            sysfs   defaults        0 0

#----------------------

I then enabled the serial console port:

Add /dev/ttyO0 to the end of rsel6-rootfs/etc/securetty

create rsel6-rootfs/etc/init/ttyO0.conf with the following content

#-------------------

start on runlevel [2345]

stop on runlevel [!2345]

respawn

exec /sbin/agetty 115200 ttyO0 vt102

#------------------

Now I replaced the ubuntu file system.

rm -fR /media/rootfs_/*

cp -R rsel6-rootfs/* /media/rootfs_

sync

remove the SD and boot in the BBB

There were still a few errors but it still came up.

login as root password password

I then manually configured eth0 with a static IP for my network

ifconfig eth0 192.168.1.4

route add default gw 192.168.1.254

I also used vim to create /etc/resolv.conf with

#---------------

nameserver 192.168.1.254

nameserver 127.0.0.1

#---------------

To make the network configuration permanent you will need to create some missing files:

/etc/sysconfig/network

/etc/sysconfig/network-scripts/ifcfg-eth0

That's it, it works, yum works but be careful installing packages so as not to overwrite /boot /lib/modules /lib/firmware

Also note all the software has been compiled for ARM5.

Enjoy!

Brian

Thanks for the detailed information!

I'm looking forward to trying this. I'm on a work trip+short vacation from tomorrow, so I may have to wait ten days or so to try it sadly.

Hi Shabaz,

Thank you for your set-by-set post. I like it much, but I faild on step

Transferring the image to the BBB via TFTP

When I enter

tftp 0x80200000 uImage-BBB

I have follwoing info

U-Boot# tftp 0x80200000 uImage-BBB

link up on port 0, speed 100, full duplex

Using cpsw device

TFTP from server 192.168.111.189; our IP address is 192.168.111.131

Filename 'uImage-BBB'.

Load address: 0x80200000

Loading: T T T T T T T T T T T T T T T T T T T T

Retry count exceeded; starting again

using musb-hdrc, OUT ep1out IN ep1in STATUS ep2in

MAC c8:a0:30:b8:ac:84

HOST MAC de:ad:be:af:00:00

RNDIS ready

ERROR: The remote end did not respond in time.

at ether.c:2395/usb_eth_init()

link up on port 0, speed 100, full duplex

than repeat and repeat again utill I kill it.

I have check tftp server and seems work. My host is ubunut 12.04 on a virtualBox.

Do you have any idea how I should fix this issue? Thank you

Joe

Hi Joe,

I did once see that output, I think that might mean that either a firewall is blocking TFTP, or maybe the TFTP server folder (from where it will serve the file) is different to the folder where the image is placed. I'm not familiar with Ubuntu (it may come with a different TFTP server) so it may be worth double-checking what the default TFTP folder is.

Hi,

Really sorry, I am quite new and I spent several days traying a lot of things. First of all, my goal is update new kernel in my beaglebone black.

I followed this procedure, Building BBB Kernel - eLinux.org , without any problem until "Start up minicom, and power up the BBB; quickly press space repeatedly to stop it at the u-boot prompt."

I don't know how to get u-boot prompt. I bougth a uSD card and followed plenty of procedures (i.e. BeagleBone Black - Linux on ARM - eewiki) but i can not get it.

I followed the procedures to run an angstron image from sd, but always got angstom prompt instead of u-boot propt.

I tryyes as well to copy MLO, u-boot.img into boot partition of uSD, but when I connect the usb 3 leds (USR0:2) turn on and keep this status always. I wonder if maybe i need a serial cable (http://es.farnell.com/ftdi/ttl-232r-3v3/cable-usb-to-ttl-level-serial-conv/dp/1329311) to do this or i can get u-boot prompt directly from usb

I am using a ubuntu virtual machine to do everything.

Could u help me a little bit with this

really sorry ffor thinconeniences

regards

Hi Ignacio,

I'm sorry I didn't mention it in the text, but yes that bit used a serial cable. I don't believe it is possible in any other way, because the USB won't be running at that stage. The cable you refer to will work.

best to ignore the usb otg port altogether IMHO.  anything presented through that will only be visible after angstrom is fully booted up and has chance to load and configure the driver from an init-script. Proper serial cable connected to J1 is the only way to get to u-boot prompt.