thanks for the reply.Hopefully someone who works with this regularly can provide some answers, the only time I used booting into a RAM-only system the tools which I had "just worked" and I followed the steps outlined without fully understanding the details. However, I just tried loop mounting a compressed filesystem and that didn't work, while decompressing into a ramdisk and mounting worked fine. That's why I asked if your tool was just copying to RAM without decompression, since I have no ides what tool you use.
no , it is not decompressed. isn' t the kernel supposed to do that? As
we have tried to load this filesystem on the pc, it turns out the the
kernel can recognize it.
concerning the root=/dev/ram0,
as the default value is root=/dev/nfs, so I just modify the nfs to
ram0. is this might be a problem?
regards,
2007/9/3, Bill Davidsen <davidsen@xxxxxxx>:
Xu Yang wrote:
Hi everyone,Looking at the information below, did the program which loaded the
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.
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@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot