[U-Boot-Users] memory sizing(440GX)

[U-Boot-Users] memory sizing(440GX)

[Barbier, Renaud]

was there any messages regarding doing memory sizing?

I am trying to write a piece of code that would find out how much memory I have on my 440GX board. not too successful so far.

[U-Boot-Users] memory sizing(440GX)

[Wolfgang Denk]

In message <45ABD2373C33C4459D42B40EC4F346F205E19FAF@FTWMLVEM03.e2k.ad.ge.com> you wrote:
> was there any messages regarding doing memory sizing?

No, but there is code.

> I am trying to write a piece of code that would find out how much memory =
> I have on my 440GX board. not too successful so far.

Why do you have to write any new code? Is there any  special  problem
with common/memsize.c ?

Best regards,

Wolfgang Denk

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See us @ Embedded World, Nuremberg, Feb 22 - 24,  Hall 10.0 Booth 310
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Doubt is a pain too lonely to know that faith is his twin brother.
- Kahlil Gibran

[U-Boot-Users] memory sizing(440GX)

[Barbier, Renaud]

thanks .did not know that there was code.
should this function find the correct RAM size.

I have tried this get_ram_size(0, 512MB) on a board that has 256MB and it does not return the proper size (256MB).

I guess I need to test incrementally for the memory size. Right?


-----Original Message-----
From: wd@denx.de [mailto:wd at denx.de]
Sent: Thursday, February 17, 2005 6:34 PM
To: Barbier, Renaud (GE Infrastructure)
Cc: u-boot-users at lists.sourceforge.net
Subject: Re: [U-Boot-Users] memory sizing(440GX) 


In message <45ABD2373C33C4459D42B40EC4F346F205E19FAF@FTWMLVEM03.e2k.ad.ge.com> you wrote:
> was there any messages regarding doing memory sizing?

No, but there is code.

> I am trying to write a piece of code that would find out how much memory =
> I have on my 440GX board. not too successful so far.

Why do you have to write any new code? Is there any  special  problem
with common/memsize.c ?

Best regards,

Wolfgang Denk

-- 
See us @ Embedded World, Nuremberg, Feb 22 - 24,  Hall 10.0 Booth 310
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Doubt is a pain too lonely to know that faith is his twin brother.
- Kahlil Gibran

[U-Boot-Users] memory sizing(440GX)

[Wolfgang Denk]

In message <45ABD2373C33C4459D42B40EC4F346F205E1A387@FTWMLVEM03.e2k.ad.ge.com> you wrote:
>
> should this function find the correct RAM size.

Yes, that's what it does.

> I have tried this get_ram_size(0, 512MB) on a board that has 256MB and
> it does not return the proper size (256MB).

And what did it return instead?

> I guess I need to test incrementally for the memory size. Right?

No, the code already does that. You just have to make sure that  your
memory  mapping  is correct (i. e. that the area [base, base+maxsize]
is mapped correectly in your memory controller).

Best regards,

Wolfgang Denk

-- 
See us @ Embedded World, Nuremberg, Feb 22 - 24,  Hall 10.0 Booth 310
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Abstainer: A weak person who yields to the temptation of denying him-
self a pleasure. A total abstainer is one who  abstains  from  every-
thing  but  abstention, and especially from inactivity in the affairs
of others.                                           - Ambrose Bierce

[U-Boot-Users] memory sizing(440GX)

[Stefan Roese]

Hi Renaud,

On Thursday 17 February 2005 22:12, Wolfgang Denk wrote:

> > I guess I need to test incrementally for the memory size. Right?
>
> No, the code already does that. You just have to make sure that  your
> memory  mapping  is correct (i. e. that the area [base, base+maxsize]
> is mapped correectly in your memory controller).

Please take a look at the file "cpu/ppc4xx/sdram.c". This will show you, how 
the memory-size detection is done on the ppc405 systems (with onboard sdram) 
using the "get_ram_size" function. The code has to be modified for the 440 
ppc's, since they have a different SDRAM controller (DDR).

Best regards,
Stefan