OMAP L137 highly unstable

Hi Bindu,

The following are the suggestions.

1. May be the filesystem on MMC/SD is corrupted. Make sure the MMC/SD is partitioned with ext2 filesystem correctly and all the modules of the filesystem is copied to it. You can refer to this link for creating partition and copying the target filesystem.http://processors.wiki.ti.com/index.php/Creating_filesystems_on_removable_media#MMC.2FSD_card_procedure

2. Try mounting the filesystem through NFS first instead of MMC/SD. When it works, you can make sure that the kernel image and filesystem doesnot have any problem, then you can copy the filesystem into MMC/SD. This may help you to narrow down where the problem lies.

You can refer these two links for mounting filesystem through NFS:

http://processors.wiki.ti.com/index.php/Alternate_Boot_Methods_for_OMAP-L137/DA830#From_NFS

http://processors.wiki.ti.com/index.php/Setting_up_OMAP-L137_Target_File_System#Exporting_a_Shared_File_System_for_Target_Access

Regards,

Shankari.

-------------------------------------------------------------------------------------------------------

Please click the Verify Answer button on this post if it answers your question.
--------------------------------------------------------------------------------------------------------

Hello Shankari,

We tried both things as you said. We have even tried with many SD cards. When we tried NFS filesystem, it says Unable to get nfsd port number from server. There is also a BUG in process swapper, that also happened sometimes before.

Here is the error we have (uboot arguments are shown, as well as server/nfshost address):

Booting with TI UBL
Device OPP (300MHz, 1.2V)

U-Boot 2009.11 (Aug 22 2013 - 06:34:02)

I2C: ready
DRAM: 64 MB
In: serial
Out: serial
Err: serial
ARM Clock : 300000000 Hz
Net: More than one PHY detected.

Hit any key to stop autoboot: 0
Using device
TFTP from server 172.16.3.203; our IP address is 172.16.3.100
Filename 'uImage'.
Load address: 0xc0700000
Loading: #################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
##
done
Bytes transferred = 2005504 (1e9a00 hex)
## Booting kernel from Legacy Image at c0700000 ...
Image Name: Angstrom/2.6.32+2.6.33-rc4-r50+g
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2005440 Bytes = 1.9 MB
Load Address: c0008000
Entry Point: c0008000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Linux version 2.6.33-rc4 (koen@dominion) (gcc version 4.3.3 (GCC) ) #2 PREEMPT Tue Dec 7 13:48:02 CET 2010
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
CPU: VIVT data cache, VIVT instruction cache
Machine: DaVinci DA830/OMAP-L137/AM17xx EVM
Memory policy: ECC disabled, Data cache writethrough
DaVinci da830/omap-l137 rev2.0 variant 0x9
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8128
Kernel command line: console=ttyS2,115200n8 noinitrd ip=none root=/dev/nfs nfsroot=172.16.3.203:/home/cubesat/workdir/filesys,nolock mem=32M
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)
BUG: Bad page state in process swapper pfn:c1745
page:c04588a0 flags:(null) count:0 mapcount:14680257 mapping:(null) index:0
Backtrace:
[<c002d724>] (dump_backtrace+0x0/0x10c) from [<c02f9c60>] (dump_stack+0x18/0x1c)
r7:00000000 r6:00000005 r5:c04588a0 r4:00000000
[<c02f9c48>] (dump_stack+0x0/0x1c) from [<c00761c8>] (bad_page+0x114/0x150)
[<c00760b4>] (bad_page+0x0/0x150) from [<c0076a44>] (__free_pages_ok+0x7c/0x19c)
r5:c0458800 r4:c04588a0
[<c00769c8>] (__free_pages_ok+0x0/0x19c) from [<c0076e70>] (__free_pages+0x4c/0x50)
[<c0076e24>] (__free_pages+0x0/0x50) from [<c00240f8>] (__free_pages_bootmem+0x84/0x88)
r4:ffffffff
[<c0024074>] (__free_pages_bootmem+0x0/0x88) from [<c0012be8>] (free_all_bootmem_core+0x104/0x220)
[<c0012ae4>] (free_all_bootmem_core+0x0/0x220) from [<c0012d38>] (free_all_bootmem_node+0x14/0x18)
[<c0012d24>] (free_all_bootmem_node+0x0/0x18) from [<c000c690>] (mem_init+0xf0/0x210)
[<c000c5a0>] (mem_init+0x0/0x210) from [<c00088c0>] (start_kernel+0x130/0x2f8)
r7:c03e23d8 r6:c0026010 r5:c0409410 r4:c0409404
[<c0008790>] (start_kernel+0x0/0x2f8) from [<c0008034>] (__enable_mmu+0x0/0x2c)
r6:c0026414 r5:c04096b8 r4:00053175
Disabling lock debugging due to kernel taint
Memory: 32MB = 32MB total
Memory: 28092KB available (3792K code, 296K data, 132K init, 0K highmem)
SLUB: Genslabs=11, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Hierarchical RCU implementation.
NR_IRQS:245
Console: colour dummy device 80x30
Calibrating delay loop... 149.50 BogoMIPS (lpj=747520)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
devtmpfs: initialized
DaVinci: 128 gpio irqs
NET: Registered protocol family 16
bio: create slab <bio-0> at 0
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
pcf857x: probe of 1-003f failed with error -121
Switching to clocksource timer0_0
musb_hdrc: version 6.0, cppi4.1-dma, host, debug=0
Waiting for USB PHY clock good...
musb_hdrc: USB Host mode controller at fee00000 using DMA, IRQ 58
musb_hdrc musb_hdrc: MUSB HDRC host driver
musb_hdrc musb_hdrc: new USB bus registered, assigned bus number 1
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
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
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
JFFS2 version 2.2. (NAND) �© 2001-2006 Red Hat, Inc.
msgmni has been set to 55
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
io scheduler noop registered (default)
Serial: 8250/16550 driver, 3 ports, IRQ sharing disabled
serial8250.0: ttyS0 at MMIO 0x1c42000 (irq = 25) is a 16550A
serial8250.0: ttyS1 at MMIO 0x1d0c000 (irq = 53) is a 16550A
serial8250.0: ttyS2 at MMIO 0x1d0d000 (irq = 61) is a 16550A
console [ttyS2] enabled
brd: module loaded
at24 1-0050: 32768 byte 24c256 EEPROM (writable)
Read MAC addr from EEPROM: 00:0e:99:02:ff:2b
spi_davinci spi_davinci.0: DaVinci SPI driver in EDMA mode
Using RX channel = 14 , TX channel = 15 and event queue = 1
m25p80 spi0.0: w25x32 (4096 Kbytes)
Creating 3 MTD partitions on "m25p80":
0x000000000000-0x000000040000 : "U-Boot"
0x000000040000-0x000000044000 : "U-Boot Environment"
0x000000044000-0x000000400000 : "Linux"
spi_davinci spi_davinci.0: Controller at 0xfec41000
console [netcon0] enabled
netconsole: network logging started
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
ohci ohci.0: DA8xx OHCI
ohci ohci.0: new USB bus registered, assigned bus number 2
ohci ohci.0: irq 59, io mem 0x01e25000
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
tsc2004: probe of 1-0049 failed with error -121
omap_rtc omap_rtc: rtc core: registered omap_rtc as rtc0
omap_rtc: RTC power up reset detected
omap_rtc: already running
i2c /dev entries driver
Linux video capture interface: v2.00
usbcore: registered new interface driver uvcvideo
USB Video Class driver (v0.1.0)
watchdog watchdog: heartbeat 60 sec
davinci_mmc davinci_mmc.0: Using DMA, 4-bit mode
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
Advanced Linux Sound Architecture Driver Version 1.0.21.
usbcore: registered new interface driver snd-usb-audio
No device for DAI tlv320aic3x
asoc: tlv320aic3x <-> davinci-i2s mapping ok
ALSA device list:
#0: DA830/OMAP-L137 EVM (tlv320aic3x)
TCP cubic registered
NET: Registered protocol family 17
Clocks: disable unused aemif
Clocks: disable unused emac
emac-mii: probed
omap_rtc omap_rtc: setting system clock to 2013-08-29 19:51:14 UTC (1377805874)
Looking up port of RPC 100003/2 on 172.16.3.203
rpcbind: server 172.16.3.203 not responding, timed out
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 172.16.3.203

Booting with TI UBL
Device OPP (300MHz, 1.2V)

U-Boot 2009.11 (Aug 22 2013 - 06:34:02)

I2C: ready
DRAM: 64 MB
In: serial
Out: serial
Err: serial
ARM Clock : 300000000 Hz
Net: More than one PHY detected.

Hit any key to stop autoboot: 0
U-Boot > pri
bootdelay=3
baudrate=115200
bootfile="uImage"
ethaddr=00:0e:99:02:ff:2b
bootcmd=tftp 0xc0700000 uImage; bootm
fileaddr=C0700000
ipaddr=172.16.3.100
serverip=172.16.3.203
rootpath=/home/cubesat/workdir/filesys
filesize=1e9a00
nfshost=172.16.3.203
bootargs=console=ttyS2,115200n8 noinitrd ip=none root=/dev/nfs nfsroot=172.16.3.203:/home/cubesat/workdir/filesys,nolock mem=32M
stdin=serial
stdout=serial
stderr=serial
ver=U-Boot 2009.11 (Aug 22 2013 - 06:34:02)

Environment size: 460/16380 bytes
U-Boot > ping 172.16.3.203
Using device
host 172.16.3.203 is alive

Please help,

Bindu

Hi Bindu,

1. Please ensure that the NFS service is running on Host machine. The below command should list the NFS exported file system.

Example:

$ sudo exportfs 

/home/cubesat/workdir/filesys

                                   <world>

 If it fails to list as example shown above, then please add the entry in /etc/exports(NFS) and restart the NFS server. Please refer below wiki link.

http://processors.wiki.ti.com/index.php/Linux_Host_Configuration_-_Ubuntu#Installing_a_NFS_Server

2. Please refer the below wiki link for u-boot bootargs for mounting NFS. The IP field should have either static ip or dhcp to mount file system through network. 

http://processors.wiki.ti.com/index.php/GSG:_Setting_up_OMAP-L1/AM1x_Target_File_System#From_NFS

Please refer Category page OMAPL1 that will have more wiki links to understand about OMAP-L1x.

http://processors.wiki.ti.com/index.php/Category:OMAPL1

Some of the important links which shall be referred (From main category page) to solve your issue.

Boot methods and boot arguments:

http://processors.wiki.ti.com/index.php/Alternate_Boot_Methods_for_OMAP-L137/DA830

http://processors.wiki.ti.com/index.php/Booting_Linux_kernel_using_U-Boot

http://processors.wiki.ti.com/index.php/GSG:_Setting_up_OMAP-L1/AM1x_Target_File_System

Latest PSP Releases:

http://processors.wiki.ti.com/index.php/DaVinci_(ARM9)_PSP_Releases#DA850.28Spectrum_Digital_EVM.29.2C_DA830.28Spectrum_Digital_EVM_and_Spectrum_Digital_WiFi_EVM.29_and_OMAP-L138.28_Logic_PD_EVM_and_LCDK.29

Hello Rajasekaran,

NFS mount now works, but we are still getting the same error. There's usually a seg fault after "starting udev". We have already tried everything else -- different SD cards, different kernel, re-building kernel, different file system, re-downloading the filesystem, even tried the older PSP available on the TI website. Also re-written the uboot image in the SPI flash. We have basically refreshed everything on the entire board!

Errors usually are:

"Segmentation fault" [AND / OR]

"unable to handle kernel paging request at virtual address xyz" [AND / OR]

"BUG: scheduling while atomic" [AND / OR]

"BUG: bad page state in process swapper"

Please help!

Bindu

Hi Bindu,

I have one more suggestion to check.

Could you please check the u-boot parameter mem with the value 48M or 64M or without mem param?

Thanks.

Hi Bindu,

If the above suggestion did not solve the issue then please run the memory test(Address bus & Data bus) to ensure the 64MB DDR is working properly. 

Please download the EVMOMAPL137 Test Code that has the memory test app.

http://support.spectrumdigital.com/boards/evmomapl137/revg/

Thanks.

Hello Rajasekaran,

We tried the 64 MB, 48 MB and having no option for mem value. None of them worked. We downloaded the tests you suggested and run the tests in the .../dsp/tests folder. All of them passed, except the two below:

emac_loopback:

01 Testing Ethernet RMII loopback...
Waiting for link...
Link Detected
PHY1[0] = 3120
PHY1[1] = 7808
PHY2[0] = 3120
PHY2[1] = 782c

FAIL... error code 4... quitting

AND

UART:

01 Testing UART...
FAIL... error code -1... quitting

Does this mean those two are bad/corrupt in same way?

Thanks,

Bindu

Also, the SDRAM tests yielded the following:

01 Testing DDR...
pppp PASS

***ALL Tests Passed***

Has anyone found an answer to this? What do those test results mean?