RE: test app

[Vanalme Filip <F.Vanalme@TELEVIC.com>]

> -----Original Message-----
> From: Baruch Siach [mailto:baruch@tkos.co.il]
> Sent: dinsdag 8 maart 2011 19:09
> To: Vanalme Filip
> Cc: barebox@lists.infradead.org
> Subject: Re: test app
> 
> Hi Vanalme,
> 
> On Tue, Mar 08, 2011 at 04:52:49PM +0100, Vanalme Filip wrote:
> > Compiling and linking seems to work well now. When I dump the .elf, I see
> > that the start address is 0xA7E00000. That's what I wanted.
> > However, when loading the app in ram and executing it, I see that it tries to start
> from 0xA0000000 (this is the base address of the RAM section) :
> >
> > barebox:/test tftp testapp.bin
> > TFTP from server 10.0.48.80 ('testapp.bin' -> 'testapp.bin')
> >
> > barebox:/test cp testapp.bin /dev/ram0
> > barebox:/test go /dev/ram0
> > ## Starting application at 0xA0000000 ...
> > ?¶/ÿ'.e¢Óø­ñ_
> >
> > _øýàõÒÿ ïO
> >           ÿOÿðzþðöàþ A'}®ÿ
> > ùý"õÿ?O¿PP¼@Y
> >              }¸m
> >                ×´ï@ïðx`G-/
> >
> >
> > Should I specify an address when executing 'go' or 'cp' ? Isn't it loading the app
> always at the beginning of the RAM space, i.e. 0xA0000000 ?
> 
> Is 0xA0000000 the beginning of you external RAM?

 
[Filip]  yes.
I meanwhile adjusted Makefile and test app source code to start from address 0xA0000000. This seem to work well. My test app is running now.
Because it's just a test app, I think it's OK to put it at the beginning of the external RAM (so at address 0xA0000000). No use in trying to move it to another region in the external RAM, is it ?

> 
> Note that in my example I used /dev/sram0 (on-chip 128K SRAM), not /dev/ram0
> (external DDR2 RAM).
> 
> baruch
> 

[Filip] If I'm right (have to verify though), i.MX27 does not have any SRAM on board. So, I guess external RAM will be the only option. Because the test app resides in the external RAM, it won't be possible to test the whole RAM. But I think we can live with that limitation.

Thanks !

Filip
> --
>                                                      ~. .~   Tk Open Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
>    - baruch@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -

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