Load root filesystem

The 1st problem I can see is the mismatch between the rootfs type you have on your card ("ext3"), the partition name and the one supplied in the kernel command line.

In your attached log, I can see the following kernel command line:

Kernel command line: noinitrd console=ttymxc0,115200 root=/dev/mtdblock0 rw rootfstype=jffs2 ip=off

So, the kernel is trying to mount "mtdblock0", which is a typical partition for a NAND flash chip, while an SD card is typically named "mmcblk". In addition, the kernel tries to mount a "jffs2" filesystem, which is again typical for raw flash chips.

From your log, I cannot see the kernel is able to identify the SD card, nor its partitions, thus you won't be able to mount your SD card partitions. You definitely need a kernel with different options.

Cheers,

Bogdan

Hi,

You are right about jffs2 file type, (I also mount with ext3 options, but result is same since problem is with kernel which is not even see properly partition list).

I tried with mmcblkXpY with changing X na Y (porper should be X=0 Y=2(or 1) since I use SD1 slot and 2nd partition) but result is same Kernel do not see any partition and panic.

The funny thing is that kernel is shipped on SD card and to boot it I am loading it from SD card to memory

ext2load mmc 0:2 0x80800000 /boot/uImage

bootm 0x80800000

I totally agree that I need too change boot parameters but changing to (which is typical solution I think) don't change error type:

noinitrd console=ttymxc0,115200 root=/dev/mmcblk0p2 rw rootfstype=ext3 ip=off

Hi,

You are right about jffs2 file type, (I also mount with ext3 options, but result is same since problem is with kernel which is not even see properly partition list).

I tried with mmcblkXpY with changing X na Y (porper should be X=0 Y=2(or 1) since I use SD1 slot and 2nd partition) but result is same Kernel do not see any partition and panic.

The funny thing is that kernel is shipped on SD card and to boot it I am loading it from SD card to memory

ext2load mmc 0:2 0x80800000 /boot/uImage

bootm 0x80800000

I totally agree that I need too change boot parameters but changing to (which is typical solution I think) don't change error type:

noinitrd console=ttymxc0,115200 root=/dev/mmcblk0p2 rw rootfstype=ext3 ip=off

Could you try a different card? I guess the kernel tries to initialize the host SD card with different parameters than your own U-Boot. The bootloader shows the controller works fine with the card but maybe the kernel driver is using different ones.

If the kernel cannot find the SD card partitions on other cards, then the kernel SD host driver needs some patching.

I have tried with 2 different cards.

1st is made by 'dd' from original RIoTboard card

2nd. partitioned by fdisk utility.

It looks like kernel is trying to use get SDHCI using DMA

mmc0: mmc_rescan_try_freq: trying to init card at 400000 Hz

mmc0: SDHCI controller on platform [sdhci-esdhc-imx.0] using DMA

mmc1: SDHCI controller on platform [sdhci-esdhc-imx.1] using DMA

sdhci sdhci-esdhc-imx.2: no write-protect pin available!

mmc2: SDHCI controller on platform [sdhci-esdhc-imx.2] using DMA

Thermal calibration data is 0x59c52d5f

Thermal sensor with ratio = 158

Anatop Thermal registered as thermal_zone0

mmc0: mmc_rescan_try_freq: trying to init card at 300000 Hz

anatop_thermal_probe: default cooling device is cpufreq!

dcp dcp.0: DCP crypto enabled.!

usbcore: registered new interface driver usbhid

usbhid: USB HID core driver

usbcore: registered new interface driver snd-usb-audio

mxc_spdif mxc_spdif.0: MXC SPDIF Audio

Cirrus Logic CS42888 ALSA SoC Codec Driver

i2c-core: driver [cs42888] using legacy suspend method

i2c-core: driver [cs42888] using legacy resume method

mmc0: mmc_rescan_try_freq: trying to init card at 200000 Hz

mmc0: mmc_rescan_try_freq: trying to init card at 100000 Hz

wm8962 1-001a: Device is not a WM8962, ID 0 != 6243

wm8962 1-001a: asoc: failed to probe CODEC wm8962.1-001a: -22

asoc: failed to instantiate card wm8962-audio: -22

imx_3stack asoc driver

asoc: mxc-spdif <-> imx-spdif-dai.0 mapping ok

Initialize HDMI-audio failed. Load HDMI-video first!

ALSA device list:

  #0: imx-spdif

TCP cubic registered

NET: Registered protocol family 17

can: controller area network core (rev 20090105 abi 8)

NET: Registered protocol family 29

mmc1: mmc_rescan_try_freq: trying to init card at 400000 Hz

can: raw protocol (rev 20090105)

can: broadcast manager protocol (rev 20090105 t)

Bluetooth: RFCOMM TTY layer initialized

Bluetooth: RFCOMM socket layer initialized

Bluetooth: RFCOMM ver 1.11

Bluetooth: BNEP (Ethernet Emulation) ver 1.3

Bluetooth: BNEP filters: protocol multicast

Bluetooth: HIDP (Human Interface Emulation) ver 1.2

lib80211: common routines for IEEE802.11 drivers

VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4

Bus freq driver module loaded

Bus freq driver Enabled

mxc_dvfs_core_probe

DVFS driver module loaded

regulator_init_complete: PFUZE100_VGEN6: incomplete constraints, leaving on

mmc1: mmc_rescan_try_freq: trying to init card at 300000 Hz

regulator_init_complete: PFUZE100_VGEN5: incomplete constraints, leaving on

regulator_init_complete: SPKVDD: incomplete constraints, leaving on

snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 01:14:32 UTC (4472)

jffs2: Too few erase blocks (2)

List of all partitions:

1f00              64 mtdblock0  (driver?)

No filesystem could mount root, tried:  jffs2

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,0)

[<8003d438>] (unwind_backtrace+0x0/0xf8) from [<8048d23c>] (panic+0x74/0x188)

[<8048d23c>] (panic+0x74/0x188) from [<80008d74>] (mount_block_root+0x1e0/0x224)

[<80008d74>] (mount_block_root+0x1e0/0x224) from [<80008ea0>] (mount_root+0xe8/0x108)

[<80008ea0>] (mount_root+0xe8/0x108) from [<80008fe0>] (prepare_namespace+0x120/0x178)

[<80008fe0>] (prepare_namespace+0x120/0x178) from [<800089d0>] (kernel_init+0xf4/0x124)

[<800089d0>] (kernel_init+0xf4/0x124) from [<800385b0>] (kernel_thread_exit+0x0/0x8)

You can try to put a "rootwait" parameter in the kernel command line. This would allow the SD card driver to initialize if it needs some more time to do so.

"rootwait" would hold on the kernel from booting until the specified partition is ready. A similar parameter is "rootdelay", which would tell the kernel to wait for a few seconds (e.g. "rootdelay=5" to wait 5 seconds before trying to mount rootfs). The latter would allow the kernel to mount rootfs after the specified amount, however, if the root partition is not ready after the specified time, the rootfs mount process would fail.

Please, try to add the "rootwait" parameter and tell if the kernel is able to identify the SD card after all the waiting.

Ok I am closer

"host SD card with different parameters than your own U-Boot" <-- there were key.

I change card MUX setting on configuration files.

(had 8bit support while using only 4 to communicate with SD).

Now kernel command line look:

Kernel command line: noinitrd console=ttymxc0,115200 root=/dev/mmcblk0p2 rootwait rw rootfstype=ext3 ip=off

now partitions are visible.

VFS: Cannot open root device "mmcblk0p2" or unknown-block(179,2)
Please append a correct "root=" boot option; here are the available partitions:
mmc1: mmc_rescan_try_freq: trying to init card at 100000 Hz
1f00              64 mtdblock0  (driver?)
b300         3931136 mmcblk0  driver: mmcblk
  b301          204800 mmcblk0p1 00000000-0000-0000-0000-000000000000
  b302         3725312 mmcblk0p2 00000000-0000-0000-0000-000000000000
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)

so close but why it is not booting since it looks ok?

It is good you have the kernel detecting the SD card partitions.

Are you sure the kernel supports ext3 FS? One reason for mount failure might be the kernel's inability to recognize the filesystem in your partition. Can you try with a 2nd SD card? But please use ext2 as its filesystem for your partition. My guess is maybe the default compilation options for your kernel only included just the ext2 fs type.

Yes I just have checked with 2nd card and filesystem is loading. BTW. Really appreciate Your help. I owe You a beer

Although it is default one form RIoTboard and cause problem during loading.

It looks like some packages are missing but to be honest I don't know why I can't build whole root filesystem (actually can't set install path during kernel compilation):

here is how I try to build filesystem:

:~$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j4 INSTALL_PATH=/home/user_imx/linux-imx/rootfs install
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
make[1]: `include/generated/mach-types.h' is up to date.
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  Kernel: arch/arm/boot/Image is ready
/bin/sh /home/user_imx/linux-imx/arch/arm/boot/install.sh 3.0.35-02887-g731b440-dirty \
  arch/arm/boot/Image System.map "/home/user_imx/linux-imx/rootfs"
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.0.35-02887-g731b440-dirty /home/user_imx/linux-imx/rootfs/vmlinuz-3.0.35-02887-g731b440-dirty
/etc/kernel/postinst.d/apt-auto-removal: line 75: /etc/apt/apt.conf.d//01autoremove-kernels.dpkg-new: Permission denied
run-parts: /etc/kernel/postinst.d/apt-auto-removal exited with return code 1
make[1]: *** [install] Error 1
make: *** [install] Error 2

And below is my actual log from board.

DVFS driver module loaded
regulator_init_complete: PFUZE100_VGEN6: incomplete constraints, leaving on
regulator_init_complete: PFUZE100_VGEN5: incomplete constraints, leaving on
regulator_init_complete: SPKVDD: incomplete constraints, leaving on
snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 01:19:00 UTC (4740)


EXT3-fs: barriers not enabled
kjournald starting.  Commit interval 5 seconds
EXT3-fs (mmcblk0p2): using internal journal
EXT3-fs (mmcblk0p2): mounted filesystem with ordered data mode
VFS: Mounted root (ext3 filesystem) on device 179:2.
Freeing init memory: 168K
INIT: version 2.88 booting
Error opening /dev/fb0: No such device
Starting udev
Missing devtmpfs, which is required for udev to run
Halting...
<7>mmc0: req done (CMD13): 0: 00000e00 00000000 00000000 00000000
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>mmc0: starting CMD13 arg 59b40000 flags 00000195
<7>mmc0: req done (CMD13): 0: 00000e00 00000000 00000000 00000000
<7>mmc0: req done (CMD13): 0: 00000e00 00000000 00000000 00000000
<7>mmc0: starting CMD13 arg 59b40000 flags 00000195
INIT: Sending processes the TERM signaStopping Dropbear SSH server: no /usr/sbin/dropbear found; none killed
 * Stopping Avahi mDNS/DNS-SD Daemon: avahi-daemon
   ...fail!
Stopping advanced power management daemon: no /usr/sbin/apmd found; none killed
apmd.
Stopping system message bus: dbus.
hwclock: can't open '/dev/misc/rtc': No such file or directory
stopping statd: done
stopping mountd: done
stopping nfsd: done
Stopping OProfileUI server


Stopping syslogd/klogd: Error opening /dev/fb0: No such device
no syslogd found; none killed
Stopping Telephony daemon
ALSA: Storing mixer settings...
/usr/sbin/alsactl: save_state:1590: No soundcards found...
Deconfiguring network interfaces... ifdown: interface lo not configured
ifdown: interface eth0 not configured
done.
Stopping Linux NFC daemon
Sending all processes the TERM signal...
mmc1: new high speed MMC card at address 0001
mmcblk1: mmc1:0001 MMC04G 3.65 GiB
mmcblk1boot0: mmc1:0001 MMC04G partition 1 1.00 MiB
mmcblk1boot1: mmc1:0001 MMC04G partition 2 1.00 MiB
 mmcblk1: unknown partition table
 mmcblk1boot1: unknown partition table
 mmcblk1boot0: unknown partition table
mmc2: mmc_rescan_try_freq: trying to init card at 400000 Hz
mmc2: mmc_rescan_try_freq: trying to init card at 300000 Hz
mmc2: mmc_rescan_try_freq: trying to init card at 200000 Hz
mmc2: mmc_rescan_try_freq: trying to init card at 100000 Hz
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
Sending all processes the KILL signal...
Unmounting remote filesystems...
Stopping rpcbind daemon...
not running.
Deactivating swap...
Unmounting local filesystems...
<7>mmc0: starting CMD13 arg 59b40000 flags 00000195
<7>mmc0: req done (CMD13): 0: 00000e00 00000000 00000000 00000000
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>mmc0: req done (CMD13): 0: 00000e00 00000000 00000000 00000000
<7>mmc0: starting CMD13 arg 59b40000 flags 00000195
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>mmc0: starting CMD13 arg 59b40000 flags 00000195
Power down.
umount: can't forcibly umount /mnt/.psplash: Invalid argument


DVFS driver module loaded
regulator_init_complete: PFUZE100_VGEN6: incomplete constraints, leaving on
regulator_init_complete: PFUZE100_VGEN5: incomplete constraints, leaving on
regulator_init_complete: SPKVDD: incomplete constraints, leaving on
snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 01:19:00 UTC (4740)


EXT3-fs: barriers not enabled
kjournald starting.  Commit interval 5 seconds
EXT3-fs (mmcblk0p2): using internal journal
EXT3-fs (mmcblk0p2): mounted filesystem with ordered data mode
VFS: Mounted root (ext3 filesystem) on device 179:2.
Freeing init memory: 168K
INIT: version 2.88 booting
Error opening /dev/fb0: No such device
Starting udev
Missing devtmpfs, which is required for udev to run
Halting...
<7>mmc0: req done (CMD13): 0: 00000e00 00000000 00000000 00000000
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>mmc0: starting CMD13 arg 59b40000 flags 00000195
<7>mmc0: req done (CMD13): 0: 00000e00 00000000 00000000 00000000
<7>mmc0: req done (CMD13): 0: 00000e00 00000000 00000000 00000000
<7>mmc0: starting CMD13 arg 59b40000 flags 00000195
INIT: Sending processes the TERM signaStopping Dropbear SSH server: no /usr/sbin/dropbear found; none killed
 * Stopping Avahi mDNS/DNS-SD Daemon: avahi-daemon
   ...fail!
Stopping advanced power management daemon: no /usr/sbin/apmd found; none killed
apmd.
Stopping system message bus: dbus.
hwclock: can't open '/dev/misc/rtc': No such file or directory
stopping statd: done
stopping mountd: done
stopping nfsd: done
Stopping OProfileUI server


Stopping syslogd/klogd: Error opening /dev/fb0: No such device
no syslogd found; none killed
Stopping Telephony daemon
ALSA: Storing mixer settings...
/usr/sbin/alsactl: save_state:1590: No soundcards found...
Deconfiguring network interfaces... ifdown: interface lo not configured
ifdown: interface eth0 not configured
done.
Stopping Linux NFC daemon
Sending all processes the TERM signal...
mmc1: new high speed MMC card at address 0001
mmcblk1: mmc1:0001 MMC04G 3.65 GiB
mmcblk1boot0: mmc1:0001 MMC04G partition 1 1.00 MiB
mmcblk1boot1: mmc1:0001 MMC04G partition 2 1.00 MiB
 mmcblk1: unknown partition table
 mmcblk1boot1: unknown partition table
 mmcblk1boot0: unknown partition table
mmc2: mmc_rescan_try_freq: trying to init card at 400000 Hz
mmc2: mmc_rescan_try_freq: trying to init card at 300000 Hz
mmc2: mmc_rescan_try_freq: trying to init card at 200000 Hz
mmc2: mmc_rescan_try_freq: trying to init card at 100000 Hz
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
Sending all processes the KILL signal...
Unmounting remote filesystems...
Stopping rpcbind daemon...
not running.
Deactivating swap...
Unmounting local filesystems...
<7>mmc0: starting CMD13 arg 59b40000 flags 00000195
<7>mmc0: req done (CMD13): 0: 00000e00 00000000 00000000 00000000
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>mmc0: req done (CMD13): 0: 00000e00 00000000 00000000 00000000
<7>mmc0: starting CMD13 arg 59b40000 flags 00000195
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
<7>mmc0: starting CMD13 arg 59b40000 flags 00000195
Power down.
umount: can't forcibly umount /mnt/.psplash: Invalid argument

Great to hear my advises were helpful

I guess the SD host controller is a bit picky since it doesn't accept easily any SD card. Good to know about this ...

When building the rootfs and kernel, could you try the same command with "sudo" as a prefix? From your log, it seems the error is caused by insufficient permissions on certain files/directories.

Now, on the boot log itself. It seems you still need to make some tweaks into your rootfs in order to be able to boot the board as you would need.

It seems there's no entry for some /dev devices and this causes the kernel to halt.

1. Missing devtmpfs, which is required for udev to run 
2. Halting... 

This probably means, the kernel had no support for "devtmpfs" which is an issue. If you want to use this kernel you might need to create the missing /dev entries manually but it might be easier to use a properly compiled kernel (e.g. including all the necessary support).

It works

running with sudo wasn't good idea but enable devtmpfs was

Still have some minor errors but who cares while system is booting I can move on

Great to hear that your system boots up now Congrats!

Now, you will need some time to fix the present issues but they shouldn't bee to hard to cope with