Re: [U-Boot-Users] Newbie needs help with RAMDISK
Sorry for the wrong posting. Because I was slavely following the set-up in the book I referred to in my earlier email for configuring u-boot and running the root file system from RAM disk, I thought someone else might also have followed the same path and might have indicated whether it worked for them or not.
The info in the book suggested that as long as you did a bootm <kernel address> <RAM disk address> it should work. I've also read this in the README but I think its only in the context of PPC. I do have ext2 configured in my kernel but maybe I need other options also enabled. (What kind of message should I get if its not enabled) Also what kernel command line should I use? Is root =/dev/ram correct? Do I have to set-up a u-boot envionment variable for a RAM disk?
I don't have access to the hardware for the next few days so can't send the full error message list you mentioned. But I want to prepare as much as possible.
Thanks again, Luke
I know I am present at the alter of the gods of booting and linux and I apologise if my requests fall short...... :(
From: Wolfgang Denk wd@denx.de To: "Luke Fimmerzane" lukefimmerzane@hotmail.com CC: u-boot-users@lists.sourceforge.net Subject: Re: [U-Boot-Users] Newbie needs help with RAMDISK Date: Wed, 10 Mar 2004 19:02:42 +0100
Dear Luke,
in message BAY10-F113QOTQWKySS0001f3e9@hotmail.com you wrote:
I've managed to create the ramdisk, download it to my target but when I
boot
I get this message (only relevant sections included):
Kernel command line: root=/dev/ram
Actually this is a Linux problem. Strictly speaking, this is off topic on the U-Boot list.
...... RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize ...... ..... cramfs: wrong magic FAT: bogus logical sector size 65535 Kernel panic: VFS: Unable to mount root fs on 01:00
AAgh!!! Where could I have gone wrong!!
One of your mistakes is not providing enough information. It would have been VERY useful to see the COMPLETE log of the boot messages. So we can only speculate. Do you have ext2 support enabled in your kernel configuration?
I know this is a voluntary site but if someone could give me some give
me a
few hints then thanks.
This is what these lists are for.
Best regards,
Wolfgang Denk
-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de "They that can give up essential liberty to obtain a little temporary saftey deserve neither liberty not saftey." - Benjamin Franklin, 1759
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In message BAY10-F7NuQuN6tdqVv0001a88a@hotmail.com you wrote:
The info in the book suggested that as long as you did a bootm <kernel address> <RAM disk address> it should work. I've also read this in the README but I think its only in the context of PPC. I do have
This syntax is correct for all working ports of U-Boot.
ext2 configured in my kernel but maybe I need other options also enabled. (What kind of message should I get if its not enabled) Also what kernel command line should I use? Is root =/dev/ram correct? Do I
No, the space between "rot" and "=" is wrong ;-)
have to set-up a u-boot envionment variable for a RAM disk?
Yes, at least you must define a valit "bootargs".
I know I am present at the alter of the gods of booting and linux and I apologise if my requests fall short...... :(
:-)
Best regards,
Wolfgang Denk
participants (2)
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Luke Fimmerzane -
Wolfgang Denk