ramdisk

[Xu Yang]

Hi everyone,

I want to use ramdisk to boot my filesystem, as I can't use NFS and harddisk.

I have load the ramdisk into the ram memory (start address :0x4000000)

and in the boot options I specified : root =dev/ram0 initrd=0x4000000

but the kernel said it can not find any file system on it.

Here is the information I can supply :
U-Boot 1.2.0 (Aug 31 2007 - 20:54:55)

***  Auto-detects ethernet chip ***



DRAM:   0 kB
## Unknown FLASH on Bank 1 - Size = 0x00000000 = 0 MB
Flash:  0 kB
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial

Hit any key to stop autoboot:  0
## Booting image at 00007fc0 ...
   Image Name:   Linux-2.6.19-arm2
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    740372 Bytes = 723 kB
   Load Address: 00008000
   Entry Point:  00008000
OK


## Loading Ramdisk Image at 04000000 ...
   Image Name:   ramdisc
   Image Type:   ARM Linux RAMDisk Image (gzip compressed)
   Data Size:    12582962 Bytes = 12 MB
   Load Address: 04000000
   Entry Point:  04000000

Starting kernel ...


.........................................................................................

RAMDISK driver initialized: 16 RAM disks of 10240K size 1024 blocksize
<6>loop: loaded (max 8 devices)
<6>mice: PS/2 mouse device common for all mice
<6>VFP support v0.3: implementor 41 architecture 1 part 20 variant b rev 3
No filesystem could mount root, tried:  ext2 cramfs vfat
<0>Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(1,0)


Who can give me some hints ? or point me some direction to handle this.

I appreciate this very much.

regards,

Yang
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