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From: Matthias Kaehlcke <matthias@kaehlcke.net>
To: "Eric Bénard" <eric@eukrea.com>
Cc: barebox@lists.infradead.org
Subject: Re: confusion about relocation (ARM)
Date: Fri, 1 Jan 2010 22:48:26 +0100	[thread overview]
Message-ID: <20100101214826.GS5093@darwin> (raw)
In-Reply-To: <4B3E5CCD.60400@eukrea.com>

hi eric,

thanks for your reply

El Fri, Jan 01, 2010 at 09:36:29PM +0100 Eric Bénard ha dit:

> Le 01/01/2010 20:48, Matthias Kaehlcke a écrit :
>> a comment in start_barebox() says 'We are running from RAM now', so i
>> deduced SDRAM must work. but after having a look at start-arm.S i'm a
>> little bit confused. as far as i understand the barebox code is copied
>> to RAM in copy_loop(). what i don't see is where the program counter
>> is set to the address in RAM?
>>
> in arch/arm/cpu/start-arm.S @ line 245 :
>         ldr     pc, _start_armboot

i saw this line, but i don't understand how it comes that
the address at _start_armboot points to RAM and not to the flash.

another question: how does ARCH_TEXT_BASE fit in here? i defined it as
0x05700000, but in the barebox image _TEXT_BASE is 0x00000000

kind regards

-- 
Matthias Kaehlcke
Embedded Linux Developer
Barcelona

             You must have a plan. If you don't have a plan,
               you'll become part of somebody else's plan
                                                                 .''`.
    using free software / Debian GNU/Linux | http://debian.org  : :'  :
                                                                `. `'`
gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4                  `-

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  reply	other threads:[~2010-01-01 22:25 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-01 19:48 confusion about relocation (ARM) Matthias Kaehlcke
2010-01-01 20:36 ` Eric Bénard
2010-01-01 21:48   ` Matthias Kaehlcke [this message]
2010-01-04 12:07     ` Sascha Hauer
2010-01-04 19:21       ` Matthias Kaehlcke
2010-01-04 20:13         ` Robert Schwebel
2010-01-04 21:10           ` Matthias Kaehlcke

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