uClinux on S5LinBOX configuration
---------------------------------
Marko Kovacevic, S57MMK, 02/2003

If You want to run uclinux on S5LinBOX board You will 
need uclboot (S5LinBOX Boot) already in the flash. Get the 
uclinux and config images and put them into flash from boot 
prompt. Run uclinux and edit /var/config files to meet Your 
requirements and write them back to flash (see below how).

Connect serial terminal (ie HyperTerminal or minicom) to 
UARTA port to get uclinux prompt (at 38400,N,8,1). After 
You have correct configuration You can try telnet over
ethernet.

Current image (mmk-jan-2003) includes kernel and root. 
Root is read only romfs image. Some of /etc config files
are symlinked to rw (ramfs) /var/config files. That files
are copied from special config flash partition (/dev/rom5)
at boot time (/etc/rc). Here is /etc contents:

drwxr-xr-x  2 root  root    4096 Jan 25 20:12 .
drwxr-xr-x 12 root  root    4096 Jan 25 20:12 ..
lrwxrwxrwx  1 root  root      19 Jan 25 20:12 axports -> /var/config/axports
lrwxrwxrwx  1 root  root      17 Jan 25 20:12 hosts -> /var/config/hosts
-rw-r--r--  1 root  root      44 Jan 25 20:12 inetd.conf
lrwxrwxrwx  1 root  root      19 Jan 25 20:12 inittab -> /var/config/inittab
-rw-r--r--  1 root  root       2 Jan 25 20:12 ip_forward
-rw-r--r--  1 root  root     309 Jan 25 20:12 motd
-rw-r--r--  1 root  root      21 Jan 25 20:12 passwd
-rw-r--r--  1 root  root    2778 Jan 25 20:12 ramfs.img
-rwxr-xr-x  1 root  root     298 Jan 25 20:12 rc
lrwxrwxrwx  1 root  root      23 Jan 25 20:12 resolv.conf -> /var/config/resolv.conf
-rw-r--r--  1 root  root    8205 Jan 25 20:12 services
-rw-r--r--  1 root  root      61 Jan 25 20:12 version 

/etc/rc (read only !):
mount -t proc proc /proc
/bin/expand /etc/ramfs.img /dev/ram0
mount -t ramfs /dev/ram0 /var
mkdir /var/config
mkdir /var/tmp
mkdir /var/log
mkdir /var/run
mkdir /var/lock
mount -t romfs /dev/rom5 /config
cp /config/* /var/config
source /var/config/network
sleep 2
cat /etc/motd

You can change files from /var/config to meet Your requirements
using vi editor. Then proceed as folows to save them to flash:

cd /var
genromfs -V "Config" -d /var/config -f cfg
flashw -f cfg /dev/rom5
reboot

Be careful while typing "/dev/rom5" ! Any mistake here will make 
Your flash out of order !!

Flash partitioning:
S5LinBOX hardware with 2MB/4MB FLASH.
rom0 -- root file-system (actually in RAM)
rom1 -- FLASH boot block (16k), adr:0x01000000,len:0x004000
rom2 -- FLASH boot block (8k),  adr:0x01004000,len:0x002000
rom3 -- FLASH boot block (8k),  adr:0x01006000,len:0x002000
rom4 -- FLASH kernel+file-system binary, adr:0x01020000,len:0x1d0000
rom5 -- FLASH config  (64k),    adr:0x01010000,len:0x010000
rom6 -- FLASH the whole damn thing (2Mb)!
rom7 -- FLASH etnc (64k),       adr:0x011f0000,len:0x010000


/var/config files examples:

/var/config/axports
dmascc0	MYCALL-6	0	255	7	psk1
dmascc1	MYCALL-9	0	255	7	psk2

/var/config/hosts
44.150.1.12	s57mmk.ampr.org mmk
44.150.1.1	s50lea.ampr.org lea
127.0.0.1	localhost lo
10.0.0.1	S5LinBOX

/var/config/inittab
inet:unknown:/bin/inetd /var/config/inetd.conf

/var/config/inetd.conf
telnet  stream tcp nowait root /bin/telnetd

/var/config/ax25ipd.conf
socket udp 93
device dmascc0
mode tnc
speed 0
loglevel 0
route MYCALL-0 10.0.0.2 d udp 93

/var/config/resolv.conf
domain ampr.org
nameserver 44.150.1.1

/var/config/network
hostname=myhost.ampr.org
ETHIP=10.0.0.1
ETHNET=10.0.0.0
ETHMASK=255.255.255.0
AXPIP=44.150.1.12
AXIPNET=44.150.0.0
AXIPMASK=255.255.0.0
GATE=44.150.1.1
MYCALL=MYCALL-6
GATECALL=S50LEA-0
#
ifconfig lo 127.0.0.1
ifconfig eth0 $ETHIP netmask $ETHMASK arp up
ifconfig dmascc0 $AXPIP netmask $AXIPMASK hw ax25 $MYCALL arp up 
#
arp -H ax25 -i dmascc0 -s $GATE $GATECALL
axparms -route add dmascc0 $GATECALL S55YLJ-3 -ipmode D
arp -H ax25 -i dmascc0 -s 44.150.12.1 S50SOU
axparms -route add dmascc0 S50SOU S55YLJ-4 -ipmode D
#
route add -net 127.0.0.0 lo
route add -net $AXIPNET netmask $AXIPMASK mss 1500 window 32000 irtt 200 dmascc0
route add -net $ETHIPNET netmask $ETHMASK mss 1500 window 32000 eth0
route add default gw $GATE
#
iptables -t nat -A POSTROUTING -s $ETHIP/24 -o dmascc0 -j SNAT --to-source $AXPIP
cp /etc/ip_forward /proc/sys/net/ipv4/ip_forward
#
ax25ipd -c /var/config/ax25ipd.conf &