connecting kernel to rootfs

Hi there
I build uImage and modules from friendlyarm
Then I build my rootfs by buildroot seprately from kernel
When I boot the kernel it says cannot open initial console and when I use
this tutorial I get terminal:
http://wiki.iface.ch/index.php/Basic_rootfs_for_Mini2440
But I don't have access to lcd and other devices
I think it should be from making node devices by kernel because I just have
console and tty nodes in /dev
How should I tell the kernel to build the node files?
How we should connect the kernel to the rootfs?
Thanks and sorry for my very bad Eng

> How should I tell the kernel to build the node files?

Read about "udev".

thanks for the reply
I'm very new to embedded systems and linux stuffs so how should i know
which node file must be created?
Does the kernel give us some kind of output for solving this problem?
is that any thing else must be done to have a complete rootfs?

google udev and start reading about how it works, *all* of the information
that you need will either be in a txt file in the documentation folder or
you will find it very easily on google.

After I copied files from sample rootfs which comes from dvd I was able to
do a "cat /dev/urandom>/dev/fb0" and it worked
those files were:
bin/hotplug(from sample Qtopia rootfs)
bin/hotplug.sh(from sample Qtopia rootfs)
/etc/mdev.conf(from sample Qtopia rootfs)
/lib/modules(from my kernel output)
/lib/firmware(from my kernel output)

and I use add this part to first of rcS(from sample Qtopia rootfs):
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#! /bin/sh

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:
runlevel=S
prevlevel=N
umask 022
export PATH runlevel prevlevel

#
#  Trap CTRL-C &c only in this shell so we can interrupt subprocesses.
#
trap ":" INT QUIT TSTP
/bin/hostname Shahryar

/bin/mount -n -t proc none /proc
/bin/mount -n -t sysfs none /sys
/bin/mount -n -t usbfs none /proc/bus/usb
/bin/mount -t ramfs none /dev

echo /sbin/mdev > /proc/sys/kernel/hotplug
/sbin/mdev -s
/bin/hotplug
# mounting file system specified in /etc/fstab
mkdir -p /dev/pts
mkdir -p /dev/shm
/bin/mount -n -t devpts none /dev/pts -o mode=0622
/bin/mount -n -t tmpfs tmpfs /dev/shm
/bin/mount -n -t ramfs none /tmp
/bin/mount -n -t ramfs none /var
mkdir -p /var/empty
mkdir -p /var/log
mkdir -p /var/lock
mkdir -p /var/run
mkdir -p /var/tmp

/sbin/hwclock -s

syslogd
echo "                                  " > /dev/tty1
echo "Starting system, please waiting..." > /dev/tty1
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
these changes were added to rootfs from buildroot
I don't even know which one of the changes are unnecessary because it
worked by one shot
now my question is where is the qt which I enabled when I was configuring
buildroot?
and those working node files are made by buildroot or startup did that?
thanks for answering me