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Unable to mount root fs on unknown-block(0,0)

hi Guys:

         when i boot from SD card bealgebone is ok, but in my new board, it looks like a problem.

 

U-Boot 2011.09 (Aug 28 2013 - 11:20:39)

I2C:   ready
DRAM:  256 MiB
WARNING: Caches not enabled
NAND:  HW ECC Hamming Code selected
No NAND device found!!!
0 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
*** Warning - readenv() failed, using default environment

Net:   cpsw
Hit any key to stop autoboot:  0
SD/MMC found on device 0
reading uEnv.txt

33 bytes read
Loaded environment from uEnv.txt
Importing environment from mmc ...
reading uImage

2205880 bytes read
## Booting kernel from Legacy Image at 80007fc0 ...
   Image Name:   Linux-3.2.0
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    2205816 Bytes = 2.1 MiB
   Load Address: 80008000
   Entry Point:  80008000
   Verifying Checksum ... OK
   XIP Kernel Image ... OK
OK

Starting kernel ...

[    0.252288] mtdoops: mtd device (mtddev=name/number) must be supplied
[    0.272735] sr_init: platform driver register failed
[    0.294006] drivers/rtc/hctosys.c: unable to open rtc device (rtc0)       ---------- stop here

beause the SD card with  flying line, so i try spiflash

drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
List of all partitions:
No filesystem could mount root, tried:  jffs2
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
Backtrace:
[<c00165c0>] (dump_backtrace+0x0/0x110) from [<c029325c>] (dump_stack+0x18/0x1c)
 r6:00008000 r5:cf81b006 r4:c03ff908 r3:c03d804c
[<c0293244>] (dump_stack+0x0/0x1c) from [<c02932bc>] (panic+0x5c/0x184)
[<c0293260>] (panic+0x0/0x184) from [<c0388c8c>] (mount_block_root+0x240/0x290)
 r3:cf82ff34 r2:80000000 r1:cf82ff60 r0:c0336e77
 r7:c03ae524
[<c0388a4c>] (mount_block_root+0x0/0x290) from [<c0388e1c>] (mount_root+0x54/0x68)
[<c0388dc8>] (mount_root+0x0/0x68) from [<c0388f98>] (prepare_namespace+0x168/0x1bc)
 r5:c03ae535 r4:c03fe9e0
[<c0388e30>] (prepare_namespace+0x0/0x1bc) from [<c03888c0>] (kernel_init+0xf0/0x124)
 r5:c03b6a70 r4:c03fe980
[<c03887d0>] (kernel_init+0x0/0x124) from [<c0039274>] (do_exit+0x0/0x604)
 r5:c03887d0 r4:00000000

i have test the kernel for WPI board. why in my new board is test error. i'm sure select jiffs2 filesysterm support in kernel and the cmdline is

Kernel command line: console=ttyO0,115200n8 root=/dev/mtdblock4 rw rootfstype=jffs2 ip=none  and i burning the image using myself spi_partitions

0x0 -0x20000 MLO.spi                  82.8k

0x20000-0x60000 u-boot.bin       251.7k

0x60000-0x70000 u-boot env      

0x70000-0x370000 uImage         2.0Mb

0x370000-0x1000000 filesystem 12.43Mb

 

x 出现错误。请重试或与管理员联系。