[U-Boot-Users] Passing Parameters to kernel

[U-Boot-Users] Passing Parameters to kernel

[Swapnil Ashok Narkhede]

Hi,

How do i ensure the ATAG parameters
are getting passed properly from 
U-boot to Kernel.

The bootargs command line that i
specify in U-boot is not what i see
on kernel command line.

The bootargs from U-boot gets
overwritten by the default kernel
command line specified in kernel
configuration.

What could be the cause?
How do i overcome this.

Eagerly awaiting your reply.


Regards,
Swapnil Narkhede
Mob:- 0432025023
Email:- s3092131 at student.rmit.edu.au
School of Computer Science and Information Technology
RMIT University, Melbourne

[U-Boot-Users] Passing Parameters to kernel

[Alex Zeffertt]

On Fri, 18 Nov 2005 22:19:01 +1100
"Swapnil Ashok Narkhede" <S3092131@student.rmit.edu.au> wrote:

> Hi,
> 
> How do i ensure the ATAG parameters
> are getting passed properly from 
> U-boot to Kernel.
> 
> The bootargs command line that i
> specify in U-boot is not what i see
> on kernel command line.
> 
> The bootargs from U-boot gets
> overwritten by the default kernel
> command line specified in kernel
> configuration.
> 
> What could be the cause?
> How do i overcome this.


Check if you have 

CONFIG_CMDLINE_BOOL

set in your .config.  If so, unset it.

Alex

[U-Boot-Users] Passing Parameters to kernel

[Detlef Vollmann]

Swapnil Ashok Narkhede wrote:
> The bootargs from U-boot gets
> overwritten by the default kernel
> command line specified in kernel
> configuration.
> 
> What could be the cause?
> How do i overcome this.
Which kernel and which gcc do you use?
If you use a 2.4 kernel with gcc 3.4, you'll see exactly
these problems.

 Detlef

-- 
Detlef Vollmann   vollmann engineering gmbh
Linux and C++ for Embedded Systems    http://www.vollmann.ch/
Linux for PXA270 Colibri module: www.toradex.com/e/products.html

[U-Boot-Users] Passing Parameters to kernel

[Wolfgang Denk]

In message <1132312741.535ddf1cS3092131@student.rmit.edu.au> you wrote:
> Hi,
> 
> How do i ensure the ATAG parameters
> are getting passed properly from 
> U-boot to Kernel.
> 
> The bootargs command line that i
> specify in U-boot is not what i see
> on kernel command line.
> 
> The bootargs from U-boot gets
overwritten by the default kernel
> command line specified in kernel
> configuration.
> 
> What could be the cause?
> How do i overcome this.
> 
> Eagerly awaiting your reply.
> 
> 
> Regards,
> Swapnil Narkhede
> Mob:- 0432025023
> Email:- s3092131 at student.rmit.edu.au
> School of Computer Science and Information Technology
> RMIT University, Melbourne
> 
> 
> 
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[U-Boot-Users] Passing Parameters to kernel

[Andrey Volkov]

Swapnil Ashok Narkhede wrote:
> Hi,
> 
> How do i ensure the ATAG parameters
> are getting passed properly from 
> U-boot to Kernel.
> 
> The bootargs command line that i
> specify in U-boot is not what i see
> on kernel command line.
> 
> The bootargs from U-boot gets
> overwritten by the default kernel
> command line specified in kernel
> configuration.
> 
> What could be the cause?
> How do i overcome this.
> 
> Eagerly awaiting your reply.
> 

And check cmdline size, by default cmdline in U-Boot
have 256 bytes long.

--
Regards
Andrey Volkov

[U-Boot-Users] Passing Parameters to kernel

[Detlef Vollmann]

Swapnil Ashok Narkhede wrote:
> I am using kernel 2.4.2 and gcc  3.3.1.
> But how is this related with the issue.
Starting with gcc 3.4, the attribute 'unused' is interpreted
differently.  And the ARM kernel uses this attribute for
transferring kernel parameters.

 Detlef

-- 
Detlef Vollmann   vollmann engineering gmbh
Linux and C++ for Embedded Systems    http://www.vollmann.ch/
Linux for PXA270 Colibri module: www.toradex.com/e/products.html