Hi,
The guide is here;)
Directories/locations:
a) ARMed Slack packages series:
/home/soft/cross/armedslack/armedslack-13.1/slackware
b) installer (unpacked initrd):
/home/soft/cross/bf-210/rootfs-installer
c) initrd:
/home/soft/cross/armedslack/armedslack-13.1/slackware/isolinux/uinitrd-kirkwood.img
d) kernel common to both installer and installed system:
/home/soft/cross/bf-210/rootfs/boot/uImage
IP addresses:
10.7.11.0 - subnet address
255.255.255.0 - subnet mask
10.7.11.1 - gateway
10.7.11.2 - server/host
10.7.11.10 - board/target
A. Host
-------
1. Installer preparation
$ cd /home/soft/cross/bf-210/rootfs-installer
$ dd
if=/home/soft/cross/armedslack/armedslack-13.1/isolinux/uinitrd-kirkwood.img
bs=64 skip=1 | gzip -dc | cpio -div
2. NFS server
/etc/exports:
/home/soft/cross/bf-210/rootfs-installer
10.7.11.0/255.255.255.0(rw,no_root_squash,sync,no_subtree_check)
/home/soft/cross/armedslack/armedslack-13.1/slackware
10.7.11.0/255.255.255.0(rw,no_root_squash,sync,no_subtree_check)
/home/soft/cross/bf-210/rootfs
10.7.11.0/255.255.255.0(rw,no_root_squash,sync,no_subtree_check)
$ sh /etc/rc.d/rc.rpc start
$ sh /etc/rc.d/rc.nfsd start
(probably the permissions in exports could be fine grained).
3. Kernel
Prepare and compile your kernel and copy it to:
/home/soft/cross/bf-210/rootfs/boot/uImage
The target kernel should have at least the followings compiled-in:
CONFIG_IP_PNP
CONFIG_NFS_FS
CONFIG_ROOT_NFS
B. Target
---------
1. My U-Boot environment
This is environment I use to boot installed system:
boff> printenv
bootdelay=3
baudrate=115200
ethaddr=00:17:09:00:04:11
loadaddr=0x21000000
gatewayip=10.7.11.1
netmask=255.255.255.0
bootcmd=nfs; bootm
rootpath=/home/soft/cross/bf-210/rootfs
bootfile=/home/soft/cross/bf-210/rootfs/boot/uImage
ipaddr=10.7.11.10
serverip=10.7.11.2
bootargs=mem=32M console=ttyS0,115200n8 rootdelay=1 ro root=/dev/nfs
nfsroot=10.7.11.2:/home/soft/cross/bf-210/rootfs
ip=10.7.11.10:10.7.11.2:10.7.11.1:255.255.255.0::eth0:
stdin=serial
stdout=serial
stderr=serial
Environment size: 478/508 bytes
Be aware, that nfsroot and ip are part of the bootargs environment
variable (they might seem to separate because of e-mail's line breaking).
For the installation, the following should be changed:
rootpath should point to /home/soft/cross/bf-210/rootfs-installer
bootrgs - ro flag should be changed to rw flag
After changes, you should reload bootargs environment variable, e.g.:
setenv bootargs mem=32M console=ttyS0,115200n8 rootdelay=1 ro
root=/dev/nfs nfsroot=${serverip}:${rootpath}
ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}::eth0:
I guess the options in bootargs are self-explanatory, if not, refer to
Documentation/filesystems/nfs/nfsroot.txt
Now you can issue 'boot' command.
When you are at the installer prompt, mount the NFS location the system
is going to be installed to:
$ rpc.portmap
$ rpc.statd
$ mount -t nfs -o vers=3 10.7.11.2:/home/soft/cross/bf-210/rootfs /mnt
Remember, that at this time, you need at least one partition of type Linux.
Run 'setup' and do the thing you have done for at least one billion
times already;) But first, in TARGET submenu just hit 'Continue' without
selecting any target partition.
After installation is complete, change the U-Boot environment to its
previous state so it can boot freshly installed system.
Before loading the just installed system, it is worth to do some setup
on the HOST:
- in /home/soft/cross/bf-210/rootfs/etc/fstab add the line for the rootfs:
10.7.11.2:/home/soft/cross/bf-210/rootfs / nfs noauto 0 0
- in /home/soft/cross/bf-210/rootfs/etc/securetty and
/home/soft/cross/bf-210/rootfs/etc/inittab:
configure the serial console if you use one
Now you can 'boot'.
I know that there are some things that can be done better (especially
when it comes to the NFS configuration parameters), but this just works
and I needed it very quickly.
Any questions/comments are welcome.
--
Pozdrawiam,
Best regards,
Andrzej Telszewski
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