AnsweredAssumed Answered

"Waiting for root device" Lock Up

Question asked by Paul DeMetrotion on Jan 28, 2013
Latest reply on Nov 30, 2013 by OtavioSalvador

I am in the process of building a kernel for a custom iMX6 Single Board Computer. I am using the ltib tool and kernel version 3.0.35. I believe I am at the last error before I will get a login prompt. At the end of the entire kernel_init function I get stuck in the prepare_namespace function which has a printk statement of "Waiting for root device /dev/mmcblk0p1". I have copied the images and a file system to a micro-SD card on partition 1. It would appear that either my boot device is not named properly or it is not responding which probably isn't thecase since I already have accessed it quite a bit. The boot dump is here. Note that the printk is not displaying but I used an emulator to verify it did get executed.


U-Boot 2009.08 (Jan 24 2013 - 17:23:11)

CPU: Freescale i.MX6 family TO1.2 at 792 MHz
Temperature:   26 C, calibration data 0x5884c87d
mx6q pll1: 792MHz
mx6q pll2: 528MHz
mx6q pll3: 480MHz
mx6q pll8: 50MHz
ipg clock     : 66000000Hz
ipg per clock : 66000000Hz
uart clock    : 80000000Hz
cspi clock    : 60000000Hz
ahb clock     : 132000000Hz
axi clock   : 264000000Hz
emi_slow clock: 29333333Hz
ddr clock     : 528000000Hz
usdhc1 clock  : 198000000Hz
usdhc2 clock  : 198000000Hz
usdhc3 clock  : 198000000Hz
usdhc4 clock  : 198000000Hz
nfc clock     : 24000000Hz
Board: i.MX6Q-SBC-C398: unknown-board Board: 0x63012 [POR]
Boot Device: SD
I2C:   ready
DRAM:   2 GB
In:    serial
Out:   serial
Err:   serial
Net:   got MAC address from IIM: 00:01:45:01:12:64
Hit any key to stop autoboot:  0
mmc0 is current device

MMC read: dev # 0, block # 2048, count 10240 ... 10240 blocks read: OK
## Booting kernel from Legacy Image at 10800000 ...
   Image Name:   Linux-3.0.35-1968-gd3f7f36
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    3705484 Bytes =  3.5 MB
   Load Address: 10008000
   Entry Point:  10008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Linux version 3.0.35-1968-gd3f7f36 (pauldemet@ubuntu) (gcc version 4.6.2 2011063
0 (prerelease) (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) )
#45 SMP PREEMPT Fri Jan 25 11:42:43 CST 2013
CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: WinSystems i.MX 6Quad SBC35-C398 Board
Ignoring unrecognised tag 0x54410008
debug: skip boot console de-registration.
Memory policy: ECC disabled, Data cache writealloc
CPU identified as i.MX6Q, silicon rev 1.2
PERCPU: Embedded 7 pages/cpu @8c80e000 s5504 r8192 d14976 u32768
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 487424
Kernel command line: keep_bootcon console=ttymxc0,115200 root=/dev/mmcblk0p1 roo
twait rw
PID hash table entries: 4096 (order: 2, 16384 bytes)
Dentry cache hash table entries: 262144 (order: 8, 1048576 bytes)
Inode-cache hash table entries: 131072 (order: 7, 524288 bytes)
Memory: 640MB 1280MB = 1920MB total
Memory: 1936828k/1936828k available, 160324k reserved, 360448K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xf4600000 - 0xffe00000   ( 184 MB)
    vmalloc : 0xea800000 - 0xf2000000   ( 120 MB)
    lowmem  : 0x80000000 - 0xea000000   (1696 MB)
    pkmap   : 0x7fe00000 - 0x80000000   (   2 MB)
    modules : 0x7f000000 - 0x7fe00000   (  14 MB)
      .init : 0x80008000 - 0x80036000   ( 184 kB)
      .text : 0x80036000 - 0x80a3fba8   (10279 kB)
      .data : 0x80a40000 - 0x80a92340   ( 329 kB)
       .bss : 0x80a92364 - 0x80add7ac   ( 302 kB)
SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
Preemptible hierarchical RCU implementation.
MXC GPIO hardware
sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms
MXC_Early serial console at MMIO 0x2020000 (options '115200')
bootconsole [ttymxc0] enabled
Console: colour dummy device 80x30
Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available
CPU1: Booted secondary processor
CPU2: Booted secondary processor
CPU3: Booted secondary processor
Brought up 4 CPUs
SMP: Total of 4 processors activated (6324.22 BogoMIPS).
print_constraints: dummy:
NET: Registered protocol family 16
print_constraints: vddpu: 725 <--> 1300 mV at 1100 mV fast normal
print_constraints: vddcore: 725 <--> 1300 mV at 1100 mV fast normal
print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal
print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal
print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal
print_constraints: vdd3p0: 2800 <--> 3150 mV at 3000 mV fast normal
hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.
hw-breakpoint: 1 breakpoint(s) reserved for watchpoint single-step.
hw-breakpoint: maximum watchpoint size is 4 bytes.
L310 cache controller enabled
l2x0: 16 ways, CACHE_ID 0x410000c7, AUX_CTRL 0x02070000, Cache size: 1048576 B
IMX usb wakeup probe
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
Freescale USB OTG Driver loaded, $Revision: 1.55 $
add wake up source irq 75
pca953x: probe of 0-0030 failed with error -22
pca953x: probe of 0-0032 failed with error -22
pca953x: probe of 0-0035 failed with error -22
MIPI CSI2 driver module loaded
Advanced Linux Sound Architecture Driver Version 1.0.24.
Bluetooth: Core ver 2.16
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
cfg80211: Calling CRDA to update world regulatory domain
i2c-core: driver [max17135] using legacy suspend method
i2c-core: driver [max17135] using legacy resume method
Switching to clocksource mxc_timer1
NET: Registered protocol family 2
IP route cache hash table entries: 65536 (order: 6, 262144 bytes)
TCP established hash table entries: 262144 (order: 9, 2097152 bytes)
TCP bind hash table entries: 65536 (order: 7, 786432 bytes)
TCP: Hash tables configured (established 262144 bind 65536)
TCP reno registered
UDP hash table entries: 1024 (order: 3, 32768 bytes)
UDP-Lite hash table entries: 1024 (order: 3, 32768 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
Static Power Management for Freescale i.MX6
wait mode is enabled for i.MX6
cpaddr = ea880000 suspend_iram_base=ea81e000
PM driver module loaded
IMX usb wakeup probe
i.MXC CPU frequency driver
highmem bounce pool size: 64 pages
JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
msgmni has been set to 3078
alg: No test for stdrng (krng)
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
pwm-backlight pwm-backlight.0: unable to request PWM for backlight
pwm-backlight: probe of pwm-backlight.0 failed with error -2
MIPI DSI driver module loaded
imx-sdma imx-sdma: loaded firmware 1.1
imx-sdma imx-sdma: initialized
Serial: IMX driver
loop: module loaded
vcan: Virtual CAN interface driver
CAN device driver interface
flexcan netdevice driver
FEC Ethernet Driver
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller
fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1
fsl-ehci fsl-ehci.0: irq 75, io base 0x02184000
fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
add wake up source irq 72
fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller
fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2
fsl-ehci fsl-ehci.1: irq 72, io base 0x02184200
fsl-ehci fsl-ehci.1: USB 2.0 started, EHCI 1.00
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.
ARC USBOTG Device Controller driver (1 August 2005)
mousedev: PS/2 mouse device common for all mice
i2c-core: driver [isl29023] using legacy suspend method
i2c-core: driver [isl29023] using legacy resume method
snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc0
i2c /dev entries driver
Linux video capture interface: v2.00
i2c-core: driver [mag3110] using legacy suspend method
i2c-core: driver [mag3110] using legacy resume method
Bluetooth: Virtual HCI driver ver 1.3
Bluetooth: HCI UART driver ver 2.2
Bluetooth: HCIATH3K protocol initialized
Bluetooth: Generic Bluetooth USB driver ver 0.6
usbcore: registered new interface driver btusb
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci sdhci-esdhc-imx.1: no card-detect pin available!
mmc0: no vmmc regulator found
mmc0: SDHCI controller on platform [sdhci-esdhc-imx.1] using DMA
sdhci sdhci-esdhc-imx.2: no write-protect pin available!
sdhci sdhci-esdhc-imx.2: no card-detect pin available!
mmc1: no vmmc regulator found
mmc1: SDHCI controller on platform [sdhci-esdhc-imx.2] using DMA
sdhci sdhci-esdhc-imx.3: no write-protect pin available!
sdhci sdhci-esdhc-imx.3: no card-detect pin available!
mmc2: no vmmc regulator found
mmc2: SDHCI controller on platform [sdhci-esdhc-imx.3] using DMA
sdhci sdhci-esdhc-imx.-2137481312: clk err
Probing of sdhci-pltfm failed: -2
sdhci: probe of sdhci-esdhc-imx.-2137481312 failed with error -2
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
usbcore: registered new interface driver snd-usb-audio
mxc_hdmi_soc mxc_hdmi_soc.0: MXC HDMI Audio
imx-hdmi-soc-dai: probe of imx-hdmi-soc-dai.0 failed with error -12
ALSA device list:
  No soundcards found.
NET: Registered protocol family 26
TCP cubic registered
NET: Registered protocol family 17
can: controller area network core (rev 20090105 abi 8)
NET: Registered protocol family 29
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
DVFS driver module loaded
regulator_init_complete: vddpu: incomplete constraints, leaving on
snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 00:00:00 UTC (0)

(printk of "Waiting for root device /dev/mmcblk0p1" - does not display on console)