Piyush 
hello guys
I am trying to emulate the mini2440 on the qemu emulator and to some
extent I have succeeded in doing this as when I run the
mini2440_start.sh script , I get this output:
Output:
~$ ./mini2440/start.sh
Starting in /home/piyush/mini2440
/usr/local/qemu/bin/qemu-system-arm -M mini2440 -drive file=/home/
piyush/mini2440/mini2440_snapshots.img,snapshot=on -serial stdio -
mtdblock /home/piyush/mini2440/mini2440_nand.bin -kernel /home/piyush/
mini2440/kernel-uimage -show-cursor -usb -usbdevice keyboard -
usbdevice mouse -net nic,vlan=0 -net tap,vlan=0,ifname=tap1,script=/
etc/qemu-ifup -monitor telnet::5555,server,nowait
Executing /etc/qemu-ifup
Bringing up tap1 for bridged mode...
Adding tap1 to br0...
device tap1 is already a member of a bridge; can't enslave it to
bridge br0.
S3C: CLK=240 HCLK=240 PCLK=240 UCLK=57
QEMU: ee24c08_init
DM9000: INIT QEMU MAC : 52:54:00:12:34:56
QEMU mini2440_reset: loaded default u-boot from NAND
QEMU mini2440_reset: loaded override u-boot (size 3aa00)
QEMU mini2440_reset: loaded /home/piyush/mini2440/kernel-uimage (size
229800)
S3C: CLK=240 HCLK=60 PCLK=30 UCLK=57
S3C: CLK=240 HCLK=60 PCLK=30 UCLK=48
S3C: CLK=405 HCLK=101 PCLK=50 UCLK=48
U-Boot 1.3.2-mini2440 (Jul 10 2011 - 13:06:03)
I2C: ready
DRAM: 64 MB
NOR Flash not found. Use hardware switch and 'flinit'
Flash: 0 kB
NAND: 64 MiB
Found Environment offset in OOB..
USB: S3C2410 USB Deviced
In: serial
Out: serial
Err: serial
MAC: 08:08:11:18:12:27
Hit any key to stop autoboot: 0
MINI2440 #
MINI2440 #
So I am now in the mini2440 uboot shell , but from here I want to run
the linux kernel and want the terminal of the kernel to appear in it,
and also the rootfs image.
So I want to know that what changes I have to do in my mini2440 uboot
environment variables in order to set the ip address , gateway and
other networking parameters in the uboot environment variable.
I am using the ubuntu 10.04 and I have the dhcp internet connection.
The environment variable of my mini2440 uboot is as follows:
MINI2440 # printenv
bootargs=root=/dev/mtdblock3 rootfstype=jffs2 console=ttySAC0,115200
bootcmd=
bootdelay=3
baudrate=115200
ethaddr=08:08:11:18:12:27
ipaddr=10.0.0.111
serverip=10.0.0.4
netmask=255.255.255.0
usbtty=cdc_acm
mtdparts=mtdparts=mini2440-nand:256k@0(u-boot),128k(env),5m(kernel),-
(root)
mini2440=mini2440=0tb
bootargs_base=console=ttySAC0,115200 noinitrd
bootargs_init=init=/sbin/init
root_nand=root=/dev/mtdblock3 rootfstype=jffs2
root_mmc=root=/dev/mmcblk0p2 rootdelay=2
root_nfs=/mnt/nfs
set_root_nfs=setenv root_nfs root=/dev/nfs rw nfsroot=${serverip}:$
{root_nfs}
ifconfig_static=run setenv ifconfig ip=${ipaddr}:${serverip}::$
{netmask}:mini2440:eth0
ifconfig_dhcp=run setenv ifconfig ip=dhcp
ifconfig=ip=dhcp
set_bootargs_mmc=setenv bootargs ${bootargs_base} ${bootargs_init} $
{mini2440} ${root_mmc}
set_bootargs_nand=setenv bootargs ${bootargs_base} ${bootargs_init} $
{mini2440} ${root_nand}
set_bootargs_nfs=run set_root_nfs; setenv bootargs ${bootargs_base} $
{bootargs_init} ${mini2440} ${root_nfs} ${ifconfig}
mtdids=nand0=mini2440-nand
partition=nand0,0
mtddevnum=0
mtddevname=u-boot
Environment size: 1089/131068 bytes
MINI2440 #
the ifconfig configuration of my PC before setting the network for the
Qemu and running it is as :
:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:1b:fc:c5:1a:12
inet addr:116.74.41.85 Bcast:116.74.47.255 Mask:
255.255.248.0
inet6 addr: fe80::21b:fcff:fec5:1a12/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:108 errors:0 dropped:0 overruns:0 frame:0
TX packets:126 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11818 (11.8 KB) TX bytes:14067 (14.0 KB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:116 errors:0 dropped:0 overruns:0 frame:0
TX packets:116 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9768 (9.7 KB) TX bytes:9768 (9.7 KB)
virbr0 Link encap:Ethernet HWaddr 2a:29:e5:52:cf:19
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:
255.255.255.0
inet6 addr: fe80::2829:e5ff:fe52:cf19/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:26 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:4752 (4.7 KB)
piyush@piyush-desktop:~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref
Use Iface
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0
0 virbr0
116.74.40.0 0.0.0.0 255.255.248.0 U 1 0
0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0
0 eth0
0.0.0.0 116.74.40.1 0.0.0.0 UG 0 0
0 eth0
piyush@piyush-desktop:~$
piyush@piyush-desktop:~$
piyush@piyush-desktop:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref
Use Iface
192.168.122.0 * 255.255.255.0 U 0 0
0 virbr0
116.74.40.0 * 255.255.248.0 U 1 0
0 eth0
link-local * 255.255.0.0 U 1000 0
0 eth0
default 116.74.40.1 0.0.0.0 UG 0 0
0 eth0
piyush@piyush-desktop:~$
piyush@piyush-desktop:~$
and the ifconfig configuration after setting the network bridge
between qemu and my host PC is :
~$ ifconfig
br0 Link encap:Ethernet HWaddr 00:1b:fc:c5:1a:12
inet addr:116.74.41.85 Bcast:116.74.47.255 Mask:
255.255.248.0
inet6 addr: fe80::21b:fcff:fec5:1a12/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5536 errors:0 dropped:0 overruns:0 frame:0
TX packets:5016 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3972656 (3.9 MB) TX bytes:618490 (618.4 KB)
eth0 Link encap:Ethernet HWaddr 00:1b:fc:c5:1a:12
inet6 addr: fe80::21b:fcff:fec5:1a12/64 Scope:Link
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:5817 errors:0 dropped:0 overruns:0 frame:0
TX packets:5284 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4079921 (4.0 MB) TX bytes:645671 (645.6 KB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:116 errors:0 dropped:0 overruns:0 frame:0
TX packets:116 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9768 (9.7 KB) TX bytes:9768 (9.7 KB)
tap1 Link encap:Ethernet HWaddr ea:c9:37:37:34:53
inet6 addr: fe80::e8c9:37ff:fe37:3453/64 Scope:Link
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:2 errors:0 dropped:0 overruns:0 frame:0
TX packets:20 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:84 (84.0 B) TX bytes:5522 (5.5 KB)
virbr0 Link encap:Ethernet HWaddr 2a:29:e5:52:cf:19
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:
255.255.255.0
inet6 addr: fe80::2829:e5ff:fe52:cf19/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:29 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:5004 (5.0 KB)
piyush@piyush-desktop:~$
piyush@piyush-desktop:~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref
Use Iface
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0
0 virbr0
116.74.40.0 0.0.0.0 255.255.248.0 U 0 0
0 br0
116.74.40.0 0.0.0.0 255.255.248.0 U 1 0
0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0
0 eth0
0.0.0.0 116.74.40.1 0.0.0.0 UG 0 0
0 br0
0.0.0.0 116.74.40.1 0.0.0.0 UG 0 0
0 eth0
piyush@piyush-desktop:~$
piyush@piyush-desktop:~$
piyush@piyush-desktop:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref
Use Iface
192.168.122.0 * 255.255.255.0 U 0 0
0 virbr0
116.74.40.0 * 255.255.248.0 U 0 0
0 br0
116.74.40.0 * 255.255.248.0 U 1 0
0 eth0
link-local * 255.255.0.0 U 1000 0
0 eth0
default 116.74.40.1 0.0.0.0 UG 0 0
0 br0
default 116.74.40.1 0.0.0.0 UG 0 0
0 eth0
piyush@piyush-desktop:~$
This output is when I am running the mini2440 uboot.
So what network changes I have to do in my environment variable so
that I get the rootfs running in the qemu.
Thanks
