[U-Boot-Users] relocate_code problem

[U-Boot-Users] relocate_code problem

[Oliver Fuchs]

Hi all,

I try to get up U-Boot 1.1.1 on a "home brewed" board with MPC8280 and
have problems with the relocation of code.
It crashes after the call of in_ram. It seems that it calculates the address
of in_ram correctly, but the copied code is somehow shifted.
Is there anyone who can point me to the function that copies the code into RAM?
Sorry, but the assembler code is not my favorite thing.

Thanks in advance,
Oliver


----
some extra info:

symbol in_ram is linked to 0xfff03404
relocate_code is called: relocate_code( 03fbdf48, 03fbdf6c, 03fdf000)
relocate_ram jumps to 0x03fe2404 // there is code, but not in_ram

[U-Boot-Users] relocate_code problem

[Wolfgang Denk]

In message <40EA7675.1087.8A1955@localhost> you wrote:
> 
> I try to get up U-Boot 1.1.1 on a "home brewed" board with MPC8280 and
> have problems with the relocation of code.
> It crashes after the call of in_ram. It seems that it calculates the address
> of in_ram correctly, but the copied code is somehow shifted.

Maybe it just looks shifted or repeated?

RTFM - http://www.denx.de/twiki/bin/view/DULG/UBootCrashAfterRelocation

> Is there anyone who can point me to the function that copies the code into RAM?
> Sorry, but the assembler code is not my favorite thing.

You don't need much knowledge about assembler code. "grep" will  just
do  fine  (hint: search for "relocate_code", and probably you want to
searchin the  relevant  directory  with  CPU  specific  code,  i.  e.
"cpu/mpc8260/").

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
If the hours are long enough and the pay  is  short  enough,  someone
will say it's women's work.

[U-Boot-Users] relocate_code problem

[Oliver Fuchs]

From:           	Wolfgang Denk <wd@denx.de>
Date sent:      	Tue, 06 Jul 2004 10:06:21 +0200

> > of in_ram correctly, but the copied code is somehow shifted.
> 
> Maybe it just looks shifted or repeated?
You are right. It was hard to accept the idea that the seen code was not within the RAM.

> 
> You don't need much knowledge about assembler code. "grep" will  just
> do  fine  (hint: search for "relocate_code", and probably you want to
> searchin the  relevant  directory  with  CPU  specific  code,  i.  e.
> "cpu/mpc8260/").
It was not the problem to find relocate_code. I was not smart enough to recognize
the nice little loop. Because the destination content did not change during relocate_code,
I thought it was done elsewhere.


> Best regards,
> 
> Wolfgang Denk

Thanks,
Oliver Fuchs

[U-Boot-Users] relocate_code problem

[Wolfgang Denk]

In message <40EADF20.20424.AE0466@localhost> you wrote:
> 
> > > of in_ram correctly, but the copied code is somehow shifted.
> > 
> > Maybe it just looks shifted or repeated?
> You are right. It was hard to accept the idea that the seen code was not within the RAM.

Probably your SDRAM init sequence is broken.

> It was not the problem to find relocate_code. I was not smart enough to recognize
> the nice little loop. Because the destination content did not change during relocate_code,
> I thought it was done elsewhere.

Well, check your RAM init code.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
Wenn das dann in die Hose geht, nehme ich es auf meine Kappe.
                                         -- Rudi V?ller, 15. Nov 2003