[U-Boot] Address of UBoot command line

[U-Boot] Address of UBoot command line

[kaushik619]

Im trying to access the Uboot command line in my kernel program.

Can anyone help me figure out to what address should I jump to reach the
UBoot command line ??

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[U-Boot] Address of UBoot command line

[Fabio Estevam]

--- On Wed, 10/20/10, kaushik619 <kaushik619@gmail.com> wrote:

> From: kaushik619 <kaushik619@gmail.com>
> Subject: [U-Boot] Address of UBoot command line
> To: u-boot at lists.denx.de
> Date: Wednesday, October 20, 2010, 8:29 PM
> 
> Im trying to access the Uboot command line in my kernel
> program.
> 
> Can anyone help me figure out to what address should I jump
> to reach the
> UBoot command line ??

You can do 'cat /proc/cmdline' to see the kernel command line in Linux.

Regards,

Fabio Estevam


      

[U-Boot] Address of UBoot command line

[Mike Frysinger]

On Wednesday, October 20, 2010 18:29:49 kaushik619 wrote:
> Im trying to access the Uboot command line in my kernel program.
> 
> Can anyone help me figure out to what address should I jump to reach the
> UBoot command line ??

most people do not keep u-boot resident once Linux has booted
-mike
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[U-Boot] Address of UBoot command line

[kaushik619]

Im developing my own kernel which uses uboot. I want to jump to the uboot
command line on using the exit syscall. Linux is not involved.

Can you tell me how I can reach the command line when i use the exit system
call??? 



Mike Frysinger wrote:
> 
> On Wednesday, October 20, 2010 18:29:49 kaushik619 wrote:
>> Im trying to access the Uboot command line in my kernel program.
>> 
>> Can anyone help me figure out to what address should I jump to reach the
>> UBoot command line ??
> 
> most people do not keep u-boot resident once Linux has booted
> -mike
> 
>  
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
> 
> 

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[U-Boot] Address of UBoot command line

[Mike Frysinger]

On Wednesday, October 20, 2010 21:46:45 kaushik619 wrote:

please dont top post

> Im developing my own kernel which uses uboot. I want to jump to the uboot
> command line on using the exit syscall. Linux is not involved.

either software reset and let u-boot boot like normal, or dont overwrite any 
of the u-boot code/data sections.  then just return to it.

look at the u-boot stand alone application examples
-mike
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[U-Boot] Address of UBoot command line

[Wolfgang Denk]

Dear kaushik619,

In message <30015546.post@talk.nabble.com> you wrote:
> 
> Can you tell me how I can reach the command line when i use the exit system
> call??? 

The most reliable way is by performing a hard reset of your system,
i. e. a reboot.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Madness has no purpose.  Or reason.  But it may have a goal.
	-- Spock, "The Alternative Factor", stardate 3088.7

[U-Boot] Address of UBoot command line

[Wolfgang Denk]

Dear Mike Frysinger,

In message <201010210010.47998.vapier@gentoo.org> you wrote:
>
> > Im developing my own kernel which uses uboot. I want to jump to the uboot
> > command line on using the exit syscall. Linux is not involved.
> 
> either software reset and let u-boot boot like normal, or dont overwrite any 
> of the u-boot code/data sections.  then just return to it.

This also means that you must not overwrite (or restore before return)
U-Boot's exception vectors.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
I am pleased to see that we have differences.  May we together become
greater than the sum of both of us.
	-- Surak of Vulcan, "The Savage Curtain", stardate 5906.4