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SubjectRe: ramdisk
Xu Yang wrote:
> 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.
>
Looking at the information below, did the program which loaded the
filesystem into RAM decompress it? It noted that it was compressed so I
would assume so, but I am unfamiliar with ARM tools, so I ask the
question. Also, should the boot device be "/dev/ram0" rather than
"dev/ram0" or is that correct for your system?

> 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


--
Bill Davidsen <davidsen@tmr.com>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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