I'm trying to boot my root filesystem from a nfs export on my host
machine. I found a few guides for doing this using the regular
Beagleboard but none for the Beagleboard xM.
Here's what I'm doing:
1. Boot to SD card, press space to cancel autoboot.
2. mmcinfo
3. fatload mmc 0:1 0x80200000 /uImage
4. setenv bootargs console=ttyS2,115200n8 root=/dev/nfs
nfsroot=192.168.2.1:/home/myname/bbrootfs
ip=192.168.2.2::255.255.255.0 nolock,rsize=1024,wsize=1024 rootdelay=2
5. bootm 0x80200000
The linux kernel starts but kernel panics. Here is the output:
OMAP3 beagleboard.org # bootm
0x80200000
## Booting kernel from Legacy Image at
80200000 ...
Image Name: Angstrom/2.6.32/
beagleboard
Image Type: ARM Linux Kernel Image
(uncompressed)
Data Size: 3203024 Bytes = 3.1
MiB
Load Address:
80008000
Entry Point:
80008000
Verifying Checksum ...
OK
Loading Kernel Image ...
OK
OK
Starting
kernel ...
Uncompressing
Linux.................................................................................................................................
[ 0.000000] Linux version 2.6.32 (koen@dominion) (gcc version 4.3.3
(GCC) ) #3 PREEMPT Tue Jul 26 10:56:56 CEST
2011
[ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7),
cr=10c53c7f
[ 0.000000] CPU: VIPT nonaliasing data cache, VIPT nonaliasing
instruction
cache
[ 0.000000] Machine: OMAP3 Beagle
Board
[ 0.000000] Memory policy: ECC disabled, Data cache
writeback
[ 0.000000] OMAP3630/DM3730 ES1.0 (l2cache iva sgx neon isp
192mhz_clk )
[ 0.000000] SRAM: Mapped pa 0x40200000 to va 0xfe400000 size:
0x100000
[ 0.000000] Reserving 14680064 bytes SDRAM for
VRAM
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on.
Total pages:
130048
[ 0.000000] Kernel command line: console=ttyS2,115200n8 root=/dev/
nfs nfsroot=192.168.2.1:/home/myname/bbrootfs
ip=192.168.2.2::255.255.255.0 no2
[ 0.000000] PID hash table entries: 2048 (order: 1, 8192
bytes)
[ 0.000000] Dentry cache hash table entries: 65536 (order: 6,
262144
bytes)
[ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072
bytes)
[ 0.000000] Memory: 256MB 256MB = 512MB
total
[ 0.000000] Memory: 498304KB available (5900K code, 673K data, 204K
init, 0K
highmem)
[ 0.000000] Hierarchical RCU
implementation.
[ 0.000000] NR_IRQS:
402
[ 0.000000] Clocking rate (Crystal/Core/MPU): 26.0/332/600
MHz
[ 0.000000] Reprogramming SDRC clock to 332000000
Hz
[ 0.000000] GPMC revision
5.0
[ 0.000000] IRQ: Found an INTC at 0xfa200000 (revision 4.0) with 96
interrupts
[ 0.000000] Total of 96 interrupts on 1 active
controller
[ 0.000000] OMAP GPIO hardware version
2.5
[ 0.000000] OMAP clockevent source: GPTIMER12 at 32768
Hz
[ 0.000000] Console: colour dummy device
80x30
[ 0.000000] Calibrating delay loop... 525.17 BogoMIPS
(lpj=2052096)
[ 0.000000] Mount-cache hash table entries:
512
[ 0.000000] CPU: Testing write buffer coherency:
ok
[ 0.000000] tmpfs: No value for mount option
'mode'
[ 0.000000] devtmpfs:
initialized
[ 0.000000] regulator: core version
0.5
[ 0.000000] NET: Registered protocol family
16
[ 0.000000] OMAP3 Beagle Rev: xM
C
[ 0.000000] Found NAND on
CS0
[ 0.000000] Registering NAND on
CS0
[ 0.000000] Unable to get DVI reset
GPIO
[ 0.000000] omap_init_mbox: platform not
supported
[ 85.827911] OMAP DMA hardware revision
5.0
[ 85.834197] bio: create slab <bio-0> at
0
[ 85.835418] SCSI subsystem
initialized
[ 85.836730] usbcore: registered new interface driver
usbfs
[ 85.836853] usbcore: registered new interface driver
hub
[ 85.837036] usbcore: registered new device driver
usb
[ 85.837371] i2c_omap i2c_omap.1: bus 1 rev4.0 at 2600
kHz
[ 85.840057] twl4030: PIH (irq 7) chaining IRQs
368..375
[ 85.840087] twl4030: power (irq 373) chaining IRQs
376..383
[ 85.840362] twl4030: gpio (irq 368) chaining IRQs
384..401
[ 85.842071] regulator: VUSB1V5: 1500 mV normal
standby
[ 85.842285] regulator: VUSB1V8: 1800 mV normal
standby
[ 85.842498] regulator: VUSB3V1: 3100 mV normal
standby
[ 85.843750] twl4030_usb twl4030_usb: Initialized TWL4030 USB
module
[ 85.844116] regulator: VMMC1: 1850 <--> 3150 mV normal
standby
[ 85.844360] regulator: VDAC: 1800 mV normal
standby
[ 85.844604] regulator: VPLL2: 1800 mV normal
standby
[ 85.844879] regulator: VSIM: 1800 <--> 3000 mV normal
standby
[ 85.845214] regulator: VAUX3: 1800 mV normal
standby
[ 85.845581] regulator: VAUX4: 1800 mV normal
standby
[ 85.845733] i2c_omap i2c_omap.2: bus 2 rev4.0 at 400
kHz
[ 85.845916] i2c_omap i2c_omap.3: bus 3 rev4.0 at 100
kHz
[ 85.847198] Switching to clocksource
32k_counter
[ 85.856384] musb_hdrc: version 6.0, musb-dma, otg (peripheral
+host),
debug=0
[ 85.860473] musb_hdrc: USB OTG mode controller at fa0ab000 using
DMA, IRQ
92
[ 85.860504] musb_hdrc musb_hdrc: MUSB HDRC host
driver
[ 85.860626] musb_hdrc musb_hdrc: new USB bus registered, assigned
bus number
1
[ 85.860748] usb usb1: New USB device found, idVendor=1d6b,
idProduct=0002
[ 85.860778] usb usb1: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 85.860778] usb usb1: Product: MUSB HDRC host
driver
[ 85.860809] usb usb1: Manufacturer: Linux 2.6.32 musb-
hcd
[ 85.860809] usb usb1: SerialNumber:
musb_hdrc
[ 85.861419] hub 1-0:1.0: USB hub
found
[ 85.861480] hub 1-0:1.0: 1 port
detected
[ 85.862487] NET: Registered protocol family
2
[ 85.862731] IP route cache hash table entries: 4096 (order: 2,
16384
bytes)
[ 85.863342] TCP established hash table entries: 16384 (order: 5,
131072
bytes)
[ 85.863739] TCP bind hash table entries: 16384 (order: 4, 65536
bytes)
[ 85.863922] TCP: Hash tables configured (established 16384 bind
16384)
[ 85.863952] TCP reno
registered
[ 85.863983] UDP hash table entries: 256 (order: 0, 4096
bytes)
[ 85.864013] UDP-Lite hash table entries: 256 (order: 0, 4096
bytes)
[ 85.864227] NET: Registered protocol family
1
[ 85.864654] RPC: Registered udp transport
module.
[ 85.864685] RPC: Registered tcp transport
module.
[ 85.864685] RPC: Registered tcp NFSv4.1 backchannel transport
module.
[ 85.865539] omap-iommu omap-iommu.0: isp
registered
[ 85.867248] VFS: Disk quotas
dquot_6.5.2
[ 85.867340] Dquot-cache hash table entries: 1024 (order 0, 4096
bytes)
[ 85.868377] squashfs: version 4.0 (2009/01/31) Phillip
Lougher
[ 85.869171] JFFS2 version 2.2. (NAND) (SUMMARY) �© 2001-2006 Red
Hat,
Inc.
[ 85.869995] msgmni has been set to
973
[ 85.873748] alg: No test for stdrng
(krng)
[ 85.874023] Block layer SCSI generic (bsg) driver version 0.4
loaded (major
254)
[ 85.874053] io scheduler noop
registered
[ 85.874053] io scheduler deadline
registered
[ 85.874206] io scheduler cfq registered
(default)
[ 85.933410] OMAP DSS rev
2.0
[ 85.933471] OMAP DISPC rev
3.0
[ 85.933532] OMAP VENC rev
2
[ 85.933746] OMAP DSI rev
1.0
[ 86.270263] Serial: 8250/16550 driver, 4 ports, IRQ sharing
enabled
[ 86.288970] serial8250.0: ttyS0 at MMIO 0x4806a000 (irq = 72) is a
ST16654
[ 86.307067] serial8250.1: ttyS1 at MMIO 0x4806c000 (irq = 73) is a
ST16654
[ 86.325134] serial8250.2: ttyS2 at MMIO 0x49020000 (irq = 74) is a
ST16654
[ 86.875793] console [ttyS2]
enabled
[ 86.885925] brd: module
loaded
[ 86.892211] loop: module
loaded
[ 86.896759] omap2-nand driver
initializing
[ 86.901123] No NAND device
found!!!
[ 86.904846] No NAND device
found!!!
[ 86.909362] usbcore: registered new interface driver
catc
[ 86.914855] catc: v2.8:CATC EL1210A NetMate USB Ethernet
driver
[ 86.920928] usbcore: registered new interface driver
kaweth
[ 86.926544] pegasus: v0.6.14 (2006/09/27), Pegasus/Pegasus II USB
Ethernet
driver
[ 86.934173] usbcore: registered new interface driver
pegasus
[ 86.939880] rtl8150: v0.6.2 (2004/08/27):rtl8150 based usb-ethernet
driver
[ 86.946899] usbcore: registered new interface driver
rtl8150
[ 86.952667] usbcore: registered new interface driver
asix
[ 86.958190] usbcore: registered new interface driver
cdc_ether
[ 86.964141] usbcore: registered new interface driver
dm9601
[ 86.969879] usbcore: registered new interface driver
smsc95xx
[ 86.975738] usbcore: registered new interface driver
gl620a
[ 86.981445] usbcore: registered new interface driver
net1080
[ 86.987213] usbcore: registered new interface driver
plusb
[ 86.992828] usbcore: registered new interface driver
rndis_host
[ 86.998870] usbcore: registered new interface driver
cdc_subset
[ 87.004943] usbcore: registered new interface driver
zaurus
[ 87.010620] usbcore: registered new interface driver MOSCHIP usb-
ethernet
driver
[ 87.018676] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI)
Driver
[ 87.025512] ehci-omap ehci-omap.0: OMAP-EHCI Host
Controller
[ 87.031524] ehci-omap ehci-omap.0: new USB bus registered, assigned
bus number
2
[ 87.039123] ehci-omap ehci-omap.0: irq 77, io mem
0x48064800
[ 87.058319] ehci-omap ehci-omap.0: USB 2.0 started, EHCI
1.00
[ 87.064208] usb usb2: New USB device found, idVendor=1d6b,
idProduct=0002
[ 87.071075] usb usb2: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 87.078338] usb usb2: Product: OMAP-EHCI Host
Controller
[ 87.083709] usb usb2: Manufacturer: Linux 2.6.32
ehci_hcd
[ 87.089141] usb usb2: SerialNumber: ehci-omap.
0
[ 87.094390] hub 2-0:1.0: USB hub
found
[ 87.098236] hub 2-0:1.0: 3 ports
detected
[ 87.128692] Initializing USB Mass Storage
driver...
[ 87.133789] usbcore: registered new interface driver usb-
storage
[ 87.139862] USB Mass Storage support
registered.
[ 87.144897] mice: PS/2 mouse device common for all
mice
[ 87.150512] input: gpio-keys as /devices/platform/gpio-keys/input/
input0
[ 87.158325] input: twl4030_pwrbutton as /devices/platform/i2c_omap.
1/i2c-1/1-0049/twl4030_pwrbutton/input/
input1
[ 87.169036] i2c /dev entries
driver
[ 87.173126] Linux video capture interface:
v2.00
[ 87.178070] omap-iommu omap-iommu.0: isp: version
1.1
[ 87.184722]
vpfe_init
[ 87.187591] OMAP Watchdog Timer Rev 0x31: initial timeout 60
sec
[ 87.194335] cpuidle: using governor
ladder
[ 87.198486] cpuidle: using governor
menu
[ 87.308441] mmci-omap-hs mmci-omap-hs.1: err -16 configuring card
detect
[ 87.315460] Registered led device:
beagleboard::usr0
[ 87.320648] Registered led device:
beagleboard::usr1
[ 87.327148] Registered led device:
beagleboard::pmu_stat
[ 87.334228] usbcore: registered new interface driver
usbhid
[ 87.339904] usbhid: USB HID core
driver
[ 87.343933] Advanced Linux Sound Architecture Driver Version
1.0.21.
[ 87.350830] usbcore: registered new interface driver snd-usb-
audio
[ 87.426055] usb 2-2: new high speed USB device using ehci-omap and
address
2
[ 87.437805] No device for DAI omap-mcbsp-
dai-0
[ 87.442291] No device for DAI omap-mcbsp-
dai-1
[ 87.446777] No device for DAI omap-mcbsp-
dai-2
[ 87.451263] No device for DAI omap-mcbsp-
dai-3
[ 87.455749] No device for DAI omap-mcbsp-
dai-4
[ 87.460235] OMAP3 Beagle SoC
init
[ 87.464416] asoc: twl4030 <-> omap-mcbsp-dai-0 mapping
ok
[ 87.475921] ALSA device
list:
[ 87.478912] #0: omap3beagle
(twl4030)
[ 87.482910] oprofile: using arm/
armv7
[ 87.486816] TCP cubic
registered
[ 87.490112] NET: Registered protocol family
17
[ 87.494598] NET: Registered protocol family
15
[ 87.499206] lib80211: common routines for IEEE802.11
drivers
[ 87.504943] ThumbEE CPU extension
supported.
[ 87.509246] Power Management for TI
OMAP3.
[ 87.514617] SmartReflex driver
initialized
[ 87.518890] omap3beaglelmb: Driver registration
complete
[ 87.532623] VFP support v0.3: implementor 41 architecture 3 part 30
variant c rev
3
[ 87.540863] registered taskstats version
1
[ 87.558441] Console: switching to colour frame buffer device
80x30
[ 87.576965] regulator_init_complete: incomplete constraints,
leaving VAUX3
on
[ 87.584472] regulator_init_complete: incomplete constraints,
leaving VDAC
on
[ 87.592407] omap_vout omap_vout: probed for an unknown
device
[ 87.605957] usb 2-2: New USB device found, idVendor=0424,
idProduct=9514
[ 87.612701] usb 2-2: New USB device strings: Mfr=0, Product=0,
SerialNumber=0
[ 87.620574] hub 2-2:1.0: USB hub
found
[ 87.624572] hub 2-2:1.0: 5 ports
detected
[ 87.722351] mmc0: host does not support reading read-only switch.
assuming write-
enable.
[ 87.730560] mmc0: new high speed SDHC card at address
1234
[ 87.736511] mmcblk0: mmc0:1234 SA04G 3.63
GiB
[ 87.741333] mmcblk0: p1
p2
[ 87.925689] usb 2-2.1: new high speed USB device using ehci-omap
and address
3
[ 88.051330] usb 2-2.1: New USB device found, idVendor=0424,
idProduct=ec00
[ 88.058258] usb 2-2.1: New USB device strings: Mfr=0, Product=0,
SerialNumber=0
[ 88.068359] smsc95xx
v1.0.4
[ 88.105407] IP-Config: No network devices
available.
[ 88.110443] Waiting 2sec before mounting root
device...
[ 88.128814] usb0: register 'smsc95xx' at usb-ehci-omap.0-2.1,
smsc95xx USB 2.0 Ethernet, 6e:0f:b4:4c:3a:
4a
[ 90.121032] Looking up port of RPC 100003/2 on
192.168.2.1
[ 120.120819] rpcbind: server 192.168.2.1 not responding, timed
out
[ 120.127014] Root-NFS: Unable to get nfsd port number from server,
using
default
[ 120.134368] Looking up port of RPC 100005/1 on
192.168.2.1
[ 150.136444] rpcbind: server 192.168.2.1 not responding, timed
out
[ 150.142608] Root-NFS: Unable to get mountd port number from server,
using
default
[ 150.150268] Root-NFS: Server returned error -101 while mounting /
home/myname/
bbrootfs
[ 150.158416] VFS: Unable to mount root fs via NFS, trying
floppy.
[ 150.164947] VFS: Cannot open root device "nfs" or unknown-
block(2,0)
[ 150.171356] Please append a correct "root=" boot option; here are
the available
partitions:
[ 150.179809] b300 3813376 mmcblk0 driver:
mmcblk
[ 150.185089] b301 120456
mmcblk0p1
[ 150.189392] b302 3445942
mmcblk0p2
[ 150.193695] Kernel panic - not syncing: VFS: Unable to mount root
fs on unknown-block(2,0)
Wireshark shows no packets coming out of the Beagleboard even though
the kernel says its trying to reach my laptop at 192.168.2.1.