[U-Boot] Uboot booting RTOS

[U-Boot] Uboot booting RTOS

[rahanesh at tataelxsi.co.in]

Hi All,
 
I am trying to boot a RTOS from uboot. I have the uboot flashed in NAND
Flash.
 
When i power on the board(OMAP3530 based from Mistral) uboot prompt comes
up. Now how do i boot an RTOS which is also residing in NAND Flash at
different offset.?
 
Can i acheive this without changing the source code of current Uboot. ? ie
Can i acheive this by setting certain environment variables?
 
The format of  RTOS which i am trying to port is not similar to Linux. It is
Just an executable(OS and application compiled and built together to form an
executable).
 
I am newbie to uboot. Please help me on this
 
Thanks,
Rahanesh
 

The information contained in this electronic message and any attachments to this message are intended for the exclusive 
use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended
 recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy
 all copies of this message and any attachments contained in it.

[U-Boot] Uboot booting RTOS

[Scott Wood]

On Mon, Apr 06, 2009 at 03:44:43PM +0530, rahanesh at tataelxsi.co.in wrote:
> When i power on the board(OMAP3530 based from Mistral) uboot prompt comes
> up. Now how do i boot an RTOS which is also residing in NAND Flash at
> different offset.?
>  
> Can i acheive this without changing the source code of current Uboot. ? 

Yes.  Use "nand read" to copy the image into RAM, then jump to it using
whatever mechanism is appropriate for your image.

-Scott

[U-Boot] Uboot booting RTOS

[rahanesh at tataelxsi.co.in]

Hi,

For the time being can I load RTOS using any elf loader through serial port.
Does U boot have any elf loader. 

How can I load a RTOS image(elf format) to memory through Serial cable from
uboot terminal?

Thanks
Rahanesh

-----Original Message-----
From: Scott Wood [mailto:scottwood at freescale.com] 
Sent: Tuesday, April 07, 2009 1:56 AM
To: rahanesh at tataelxsi.co.in
Cc: u-boot at lists.denx.de
Subject: Re: [U-Boot] Uboot booting RTOS

On Mon, Apr 06, 2009 at 03:44:43PM +0530, rahanesh at tataelxsi.co.in wrote:
> When i power on the board(OMAP3530 based from Mistral) uboot prompt 
> comes up. Now how do i boot an RTOS which is also residing in NAND 
> Flash at different offset.?
>  
> Can i acheive this without changing the source code of current Uboot. ? 

Yes.  Use "nand read" to copy the image into RAM, then jump to it using
whatever mechanism is appropriate for your image.

-Scott


The information contained in this electronic message and any attachments to this message are intended for the exclusive 
use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended
 recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy
 all copies of this message and any attachments contained in it.

[U-Boot] Uboot booting RTOS

[Wolfgang Denk]

Dear rahanesh at tataelxsi.co.in,

In message <VSNLCHNFE001xYH7x0J000798c0@VSNLCHNFE001.VSNLXCHANGE.COM> you wrote:
> 
> For the time being can I load RTOS using any elf loader through serial port.
> Does U boot have any elf loader. 
> 
> How can I load a RTOS image(elf format) to memory through Serial cable from
> uboot terminal?

The best approach for you requires two steps. The first step is
reading the Manual.

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
"Go to Heaven for the climate, Hell for the company."    - Mark Twain

[U-Boot] Uboot booting RTOS

[Nishanth Menon]

rahanesh at tataelxsi.co.in said the following on 04/07/2009 01:01 AM:
> Hi,
>
> For the time being can I load RTOS using any elf loader through serial port.
> Does U boot have any elf loader. 
>
> How can I load a RTOS image(elf format) to memory through Serial cable from
> uboot terminal?
>   
Could you please try running the command "help" at uboot prompt and read
through what it says? here is one way: you would need a elf to binary
convertion then once you get a binary image use "loadb" command to
download that image to sdram, then use the "go" command to give control
to that image..

Regards,
Nishanth Menon

[U-Boot] Uboot booting RTOS

[rahanesh at tataelxsi.co.in]

Hi,

I found a srec loader when I ran help command. 
Using objcopy it is possible to convert an elf format to srec file format.
After that srec loading , a Go command should be enough. I will try this and
inform you guyz

Thanks
Rahanesh
 

-----Original Message-----
From: Nishanth Menon [mailto:menon.nishanth at gmail.com] 
Sent: Tuesday, April 07, 2009 4:47 PM
To: rahanesh at tataelxsi.co.in
Cc: 'Scott Wood'; u-boot at lists.denx.de
Subject: Re: [U-Boot] Uboot booting RTOS

rahanesh at tataelxsi.co.in said the following on 04/07/2009 01:01 AM:
> Hi,
>
> For the time being can I load RTOS using any elf loader through serial
port.
> Does U boot have any elf loader. 
>
> How can I load a RTOS image(elf format) to memory through Serial cable 
> from uboot terminal?
>   
Could you please try running the command "help" at uboot prompt and read
through what it says? here is one way: you would need a elf to binary
convertion then once you get a binary image use "loadb" command to download
that image to sdram, then use the "go" command to give control to that
image..

Regards,
Nishanth Menon


The information contained in this electronic message and any attachments to this message are intended for the exclusive 
use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended
 recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy
 all copies of this message and any attachments contained in it.