[U-Boot-Users] using BDI200 to access RAM

[U-Boot-Users] using BDI200 to access RAM

[Vladimir_Levertov at mksinst.com]

Hello,
I work with custom board based on MPC850.
This board has 8MB  flash on address 0xff800000
I try to access (get/set) memory using BDI2000 telnet API (MD/MM)
Unfortunately all memory I can see is the flash. It appears on address 0 
(MD 0) and returns every 8MB.
Command PHYS 0 (map physical address) returns 0.

How can I access DRAM using BDI telnet API?

Thanks in advance.

=====================
Vladimir Levertov
Senior Software Engineer
MKS Instruments
Tel: +972-8-9181010 
Fax: +972-8-9181020
=====================
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[U-Boot-Users] using BDI200 to access RAM

[Wolfgang Denk]

In message <OF35478C15.8439F998-ONC2256EA7.004A3D27-88256EA7.004B09F2@mksinst.com> you wrote:
> 
> I work with custom board based on MPC850.
> This board has 8MB  flash on address 0xff800000
> I try to access (get/set) memory using BDI2000 telnet API (MD/MM)
> Unfortunately all memory I can see is the flash. It appears on address 0 
> (MD 0) and returns every 8MB.
> Command PHYS 0 (map physical address) returns 0.

You must initialize the memory corntoller for the RAM, i. e.  program
the BRx/ORx registers, set up the UPM engine and run the SDRAM's init
sequence (whatever this requires for your SDRAM chips).

> How can I access DRAM using BDI telnet API?

Sure. If the memory controller was set up correctly.

Examples can be find in most BDI2000 config files (both  those  which
come with the BDI and those on our FTP server), but don't expect that
a  simple copy & paste would work. You really need to understand what
you're doing. Setting up the SDRAM is the most complicated task  when
porting  to  new hardware (at least judging from the number of people
who run into truble with this).

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
"The one charm of marriage is that it makes a  life  of  deception  a
neccessity."                                            - Oscar Wilde

[U-Boot-Users] csb337

[CG]

Hello

Is there any support for csb337 board in u-boot?


Christian

[U-Boot-Users] Re: csb337

[Wolfgang Denk]

In message <0c2901c448c1$ff7719e0$6b01a8c0@cc> you wrote:
> 
> Is there any support for csb337 board in u-boot?

Maybe you bother to explain which sort of board this might be?


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
"The bad reputation UNIX has gotten is totally undeserved, laid on by
people who don't understand, who have not gotten in there  and  tried
anything."          -- Jim Joyce, owner of Jim Joyce's UNIX Bookstore

[U-Boot-Users] Re: csb337

[CG]

Features :

180 MHz ARM920T Core (AT91RM9200 microcontroller)
32 Mbyte SDRAM, 8Mbyte Flash
...

Other information here :
http://www.unicoi.com/embedded_tools/csb337_atmelat91rm9200.htm

Regards

Christian
----- Original Message -----
From: "Wolfgang Denk" <wd@denx.de>
To: "CG" <christian@mcdi.com>
Cc: <u-boot-users@lists.sourceforge.net>
Sent: Wednesday, June 02, 2004 1:03 PM
Subject: Re: csb337


> In message <0c2901c448c1$ff7719e0$6b01a8c0@cc> you wrote:
> >
> > Is there any support for csb337 board in u-boot?
>
> Maybe you bother to explain which sort of board this might be?
>
>
> 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
> "The bad reputation UNIX has gotten is totally undeserved, laid on by
> people who don't understand, who have not gotten in there  and  tried
> anything."          -- Jim Joyce, owner of Jim Joyce's UNIX Bookstore
>

[U-Boot-Users] Re: csb337

[Wolfgang Denk]

In message <0c3501c448c4$4c72fa50$6b01a8c0@cc> you wrote:
> 
> 180 MHz ARM920T Core (AT91RM9200 microcontroller)
> 32 Mbyte SDRAM, 8Mbyte Flash
> ...
> 
> Other information here :
> http://www.unicoi.com/embedded_tools/csb337_atmelat91rm9200.htm

This board is not listed in the list of supported AT91RM9200 boards.


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
C makes it easy for you to shoot yourself in the foot. C++ makes that
harder, but when you do, it blows away your whole leg.
                                                 -- Bjarne Stroustrup

[U-Boot-Users] Re: csb337

[Jean-Philippe Francois]

>In message <0c3501c448c4$4c72fa50$6b01a8c0@cc> you wrote:
>> 
>> 180 MHz ARM920T Core (AT91RM9200 microcontroller)
>> 32 Mbyte SDRAM, 8Mbyte Flash
>> ...
>> 
>> Other information here :
>> http://www.unicoi.com/embedded_tools/csb337_atmelat91rm9200.htm
>
>This board is not listed in the list of supported AT91RM9200 boards.
>

But the already supported card (Atmel's DK) is a good start.
I used it for a custom board.
Note however that in the current state you cannot boot directly on U-boot,
you need a first level bootloader, like the one provided by Atmel. 

JP Francois