RE: booting 2.6 kernel on ML403

A quick amendment to my previous email:

The device name you should use in the CONFIG_CMDLINE  "root=..." can be found in the routine call to register_blkdev() in the driver source code. The first parameter to register_blkdev() is the major number of the device. The second parameter is the name of the device, as in /dev/xsda2, or /dev/xsysace2. This second parameter will contain just the 'xsda' or 'xsysace' in it, and it may be a preprocessor constant defined earlier in the file, such as #define MAJOR_NAME "xsda", but it might not be a constant either. It depends on the code.

 

Hopefully this clears things up a bit.

 

- John

 

________________________________

From: linuxppc-embedded-bounces+jbonesio=xilinx.com@ozlabs.org [mailto:linuxppc-embedded-bounces+jbonesio=xilinx.com@ozlabs.org] On Behalf Of Pradeep Sampath
Sent: Wednesday, October 04, 2006 10:35 AM
To: Ming Liu; ammubhai@gmail.com
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: booting 2.6 kernel on ML403

 

Hello Ameet/Ming,

 

First of all really appreciate your inputs on this... 

Problem 1 :

I was using the factory shipped compact flash as is which comes with a DOS FAT16 partition and a linux 83 partition with ext3 filesystem. I tried it on 2 factory shipped CFs and its the same behavior - . When i plug-in the CF card reader to the linux box it always reads it as "sda" and in the linux2.6.17.1/Documentation/devices.txt - sda is the device file for SCSI disk devices. Wonerding how you guys configured the root option as "/dev/xsa".

 

Now i re-formatted my CF, created a ext2 filesystem using busybox-1.1.0 like the BYU instructions. Created 2 partitions on CF card 1. FAT16 partition & 2. linux partition and then created 1. dos file system using mkdosfs and 2. linux ext2 filesystem using mke2fs.

 

But the problem still persists and i get "Please append a correct "root=" boot option :"

:(

 

Problem 2: After i included the TEMAC driver and sysace drivers, the kernel just hangs. I thought i'll fix problem 1 before i get to problem 2... 

 

With your help i am getting the confidence that i can make this all work!

thanks once again.

-Pradeep



Ming Liu [off-list ref] wrote:

	Hello Ameet,
	I am using that driver very well now. There is only one problem. It seems 
	that the driver for TEMAC only support Gigabit Enet, not 10/100/1000M 
	adapted. But because I want to use the Gigabit enet, I don't care that. So 
	it's OK, at lease for 1Gbit/s.
	
	So I don't think Pradeep's problem is caused by Temac. I still suspect that 
	he didn't pass a right parameter to "root=", just like what I posted 
	before.
	
	Regards
	Ming
	
	
	>From: Ameet Patil 
	>To: Ming Liu 
	>CC: pradeepsampath@yahoo.com, linuxppc-embedded@ozlabs.org
	>Subject: Re: booting 2.6 kernel on ML403
	>Date: Wed, 04 Oct 2006 09:35:07 +0100
	>
	>Ming Liu wrote:
	> > Hi,
	> >
	> >> [ 3.093694] TCP bic registered
	> >> [ 3.129458] NET: Registered protocol family 8
	> >> [ 3.181412] NET: Registered protocol family 20
	> >> [ 3.236744] VFS: Cannot open root device "xsa2" or unknown-block(0,0)
	> >> [ 3.313092] Please append a correct "root=" boot option
	> >
	> > It looks that some errors still exist in the parameters you passed to
	> > "root=". Please double check it, or post it in the maillist for deep
	> > analysis.
	> > Regards
	> > Ming
	> >
	> > _________________________________________________________________
	> > ÏíÓÃÊÀ½çÉÏ×î´óµÄµç×ÓÓʼþϵͳ¡ª MSN Hotmail¡£ http://www.hotmail.com
	> > 
	------------------------------------------------------------------------
	> >
	> > _______________________________________________
	> > Linuxppc-embedded mailing list
	> > Linuxppc-embedded@ozlabs.org
	> > https://ozlabs.org/mailman/listinfo/linuxppc-embedded
	>Hi Ming,
	>IIRC, you are or were using the TEMAC driver along with my System Ace
	>driver, isn't it? Does my driver patch ***-after-TEMAC.patch work for
	>you? I ask this because Pradeep is having some problems using it (see
	>Problem 2 in his email). Could you please update on this?
	>
	>Thanks,
	>-Ameet
	
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