Filesystem                Size      Used Available Use% Mounted on
/dev/root                 2.5M      2.5M         0 100% /rom
tmpfs                    14.4M     88.0K     14.4M   1% /tmp
tmpfs                   512.0K         0    512.0K   0% /dev
/dev/sda1               131.2M     83.0K    124.5M   0% /overlay
mini_fo:/overlay          2.5M      2.5M         0 100% /

1-1                 mtd4                ppp
console             mtd4ro              ptmx
cpu_dma_latency     mtd5                pts
full                mtd5ro              random
kmsg                mtdblock0           sda
log                 mtdblock1           sda1
mem                 mtdblock2           sda2
mtd0                mtdblock3           shm
mtd0ro              mtdblock4           tty
mtd1                mtdblock5           ttyS0
mtd1ro              net                 tun
mtd2                network_latency     urandom
mtd2ro              network_throughput  usb1
mtd3                null                watchdog
mtd3ro              port                zero

rootfs on / type rootfs (rw)
/dev/root on /rom type squashfs (ro,relatime)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,relatime,size=14796k)
tmpfs on /dev type tmpfs (rw,relatime,size=512k,mode=755)
devpts on /dev/pts type devpts (rw,relatime,mode=600)
/dev/sda1 on /overlay type ext2 (rw,noatime,errors=continue)
mini_fo:/overlay on / type mini_fo (rw,relatime)
none on /proc/bus/usb type usbfs (rw,relatime)

AP99 (ar7241 - Virian) U-boot
DRAM:
sri
ar7240_ddr_initial_config(133): virian ddr1 init
#### TAP VALUE 1 = 0xf, 2 = 0x10 [0x0: 0x1f]
32 MB
id read 0x100000ff
sector count = 64
Flash:  4 MB
Using default environment

In:    serial
Out:   serial
Err:   serial
Net:   ag7240_enet_initialize...
No valid address in Flash. Using fixed address
No valid address in Flash. Using fixed address
Virian MDC CFG Value ==> 4
: cfg1 0xf cfg2 0x7014
eth0: 00:03:7f:09:0b:ad
eth0 up
Virian MDC CFG Value ==> 4
: cfg1 0xf cfg2 0x7214
eth1: 00:03:7f:09:0b:ad
ATHRS26: resetting s26
ATHRS26: s26 reset done
eth1 up
eth0, eth1
Autobooting in 1 seconds
ar7240> erase 0x9f020000 +0x3c0000

First 0x2 last 0x3d sector size 0x10000                                       61
Erased 60 sectors
ar7240> tftpboot 0x81000000 code.bin
dup 1 speed 1000
Using eth1 device
TFTP from server 192.168.1.27; our IP address is 192.168.1.10
Filename 'code.bin'.
Load address: 0x81000000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         ######################################################
done
Bytes transferred = 3932160 (3c0000 hex)
ar7240> cp.b 0x81000000 0x9f020000 0x3c0000
Copy to Flash... write addr: 9f020000
done
ar7240> bootm 0x9f020000
## Booting image at 9f020000 ...
   Uncompressing Kernel Image ... OK

Starting kernel ...

Linux version 2.6.32.27 (jow@nd-build-02.linux-appliance.net) (gcc version 4.3.3 (GCC) ) #5 Wed Dec 21 01:59:33 CET 2011
bootconsole [early0] enabled
CPU revision is: 00019374 (MIPS 24Kc)
Atheros AR7241 rev 1, CPU:400.000 MHz, AHB:200.000 MHz, DDR:400.000 MHz
Determined physical RAM map:
 memory: 02000000 @ 00000000 (usable)
Initrd not found or empty - disabling initrd
Zone PFN ranges:
  Normal   0x00000000 -> 0x00002000
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
    0: 0x00000000 -> 0x00002000
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 8128
Kernel command line: rootfstype=squashfs,yaffs,jffs2 noinitrd console=ttyS0,115200 board=TL-MR3420
PID hash table entries: 128 (order: -3, 512 bytes)
Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
Writing ErrCtl register=00000000
Readback ErrCtl register=00000000
Memory: 29276k/32768k available (2126k kernel code, 3492k reserved, 423k data, 152k init, 0k highmem)
SLUB: Genslabs=7, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Hierarchical RCU implementation.
NR_IRQS:56
Calibrating delay loop... 266.24 BogoMIPS (lpj=1331200)
Mount-cache hash table entries: 512
NET: Registered protocol family 16
MIPS: machine is TP-LINK TL-MR3420
registering PCI controller with io_map_base unset
bio: create slab <bio-0> at 0
PCI: fixup device 0000:00:00.0
pci 0000:00:00.0: PME# supported from D0 D1 D3hot
pci 0000:00:00.0: PME# disabled
PCI: mapping irq 48 to pin1@0000:00:00.0
Switching to clocksource MIPS
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 1024 (order: 1, 8192 bytes)
TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
TCP: Hash tables configured (established 1024 bind 1024)
TCP reno registered
NET: Registered protocol family 1
squashfs: version 4.0 (2009/01/31) Phillip Lougher
Registering mini_fo version $Id$
JFFS2 version 2.2. (NAND) (SUMMARY)  Š 2001-2006 Red Hat, Inc.
yaffs Dec 10 2011 18:14:12 Installing.
msgmni has been set to 57
io scheduler noop registered
io scheduler deadline registered (default)
Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
serial8250.0: ttyS0 at MMIO 0x18020000 (irq = 11) is a 16550A
console [ttyS0] enabled, bootconsole disabled
console [ttyS0] enabled, bootconsole disabled
Atheros AR71xx SPI Controller driver version 0.2.4
m25p80 spi0.0: unrecognized JEDEC id 1c3016
ag71xx_mdio: probed
eth0: Atheros AG71xx at 0xba000000, irq 5
eth0: Found an AR7240 built-in switch
eth1: Atheros AG71xx at 0xb9000000, irq 4
Atheros AR71xx hardware watchdog driver version 0.1.0
TCP westwood registered
NET: Registered protocol family 17
802.1Q VLAN Support v1.8 Ben Greear <greearb@candelatech.com>
All bugs added by David S. Miller <davem@redhat.com>
VFS: Cannot open root device "<NULL>" or unknown-block(0,0)
Please append a correct "root=" boot option; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)