[U-Boot-Users] Problem building U-boot for RpxLite with Mpc823e

[U-Boot-Users] Problem building U-boot for RpxLite with Mpc823e

[Ccool]

Hi guys,

I'm new to the list, but I though it would be a good place to find out some 
help.

I'm looking for some "recent" documentation for U-boot for the rpxlite 
project.  I've been trying to understand the doc, but the readme is based on 
the old project (ppcboot-0.8.1) and the date is 29-01-2001.   I'm working 
with a crosscompiler and I'm not able to compile an executable binary.  (The 
cross-compiler is the cross-tools from timesys, I also tried powerpc-eabi 
(p.o.m.p. tools suit) and it did'nt work either.)

I know the crosscompiler works, because I've compiled busybox and a kernel and 
they both work great.  Now my goal is to stop using the nfsmount (timesys 
default) and boot from the flash (probably with an initrd image).

If anyone has some doc or a link to it, a few hints would be greatly 
appreciated.

PS:  sorry for my bad english, it's not my first/main language.

Raphael

[U-Boot-Users] Problem building U-boot for RpxLite with Mpc823e

[Wolfgang Denk]

Dear Raphael,

in message <200408132105.25912.ccool@ninjatech.biz> you wrote:
> 
> I'm looking for some "recent" documentation for U-boot for the rpxlite 
> project.  I've been trying to understand the doc, but the readme is based on 

There is no "rpxlite project".

> the old project (ppcboot-0.8.1) and the date is 29-01-2001.   I'm working 

So what? If you think that parts of this documentation are  wrong  or
obsolete please point them out in detail.


> with a crosscompiler and I'm not able to compile an executable binary.  (The 
> cross-compiler is the cross-tools from timesys, I also tried powerpc-eabi 
> (p.o.m.p. tools suit) and it did'nt work either.)

I know neither of these, but it seems everybody else hase no problems
compiling the code. We're using the ELDK, and it workes  without  any
problems.

> I know the crosscompiler works, because I've compiled busybox and a kernel and 

You did not bother to mention any specific error message you get when
following the instructions.

It's impossible to help you without more (and better) information for you.

> they both work great.  Now my goal is to stop using the nfsmount (timesys 
> default) and boot from the flash (probably with an initrd image).

What makes you think that this requires to recompile U-Boot?

Did you actually READ the  available  documentation,  especially  the
DULG's  sections  about  U-Boot's  environment  variables  and how to
employ these?

> If anyone has some doc or a link to it, a few hints would be greatly 
> appreciated.

RTFM. It's at http://www.denx.de/twiki/bin/view/DULG/Manual


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
A witty saying proves nothing, but saying  something  pointless  gets
people's attention.

[U-Boot-Users] Problem building U-boot for RpxLite with Mpc823e

[Ccool]

>
> There is no "rpxlite project".
>
Sorry I meant the RPXlite section in the U-boot project. 

> > the old project (ppcboot-0.8.1) and the date is 29-01-2001.   I'm working
>
> So what? If you think that parts of this documentation are  wrong  or
> obsolete please point them out in detail.

I was talking about Readme file : "doc/README.RPXlite" file. I thought that 
the section 1 might be obsolete.  With the documentation of my RPXlite, I 
have'nt found any VisionClick flash programmer.

About the documentation link you've sent me, I read everything except the ELDK 
section.  I did compile a u-boot, u-boot.bin, and everything without any 
error messages.  (Compiler used is 2.95.2, just in case).  Before writing 
everything into the flash memory, I wanted to test it by loading it into the 
ram and execute the binary file.  ( the same way I do when I want to run 
linux on the box, I load a kernel at 0040 0000, and then run the code 
starting at 0040 0000 or 0041 0000 (when the 64k ELF header is not 
stripped)).  And as for the u-boot binaries, they do not want to run, and I 
get no error message, my RPXLite either reboot or freeze.

I also tried the u-boot.srec, just in case the S-record image would run 
better, but it did'nt.  I guess that's why I'm looking for someone who could 
give me a few hints about how to run u-boot.  

As I understand it (and maybe this is where my problem is) I am supposed to be 
able tu run u-boot's binary (or s-record image) directly from the ram. Now, 
this task seems impossible to me.  I even tried to run the elf binary in the 
linux box that I have made (mounted via nfs) and it crashed (Segmentation 
fault error only)

I know these questions might sound "newbee" to you guys, but I really need to 
know if this code is suppose to work alone, without any kernel, or it 
absolutly need to work under linux (a bit like when you run lilo from a 
"normal-i386" linux box)

I thank you a lot for your time, this is really helpful.  Like they say, the 
firsts steps are always the hardest and theses are my first in the embedded 
world...

Rapha?l

[U-Boot-Users] Problem building U-boot for RpxLite with Mpc823e

[Wolfgang Denk]

Dear Rapha?l,

in message <200408151527.48616.ccool@ninjatech.biz> you wrote:
>
> > So what? If you think that parts of this documentation are  wrong  or
> > obsolete please point them out in detail.
> 
> I was talking about Readme file : "doc/README.RPXlite" file. I thought that 
> the section 1 might be obsolete.  With the documentation of my RPXlite, I 
> have'nt found any VisionClick flash programmer.

That doesn't mean that the documentationis obsolete. You  can  buy  a
Visio*  Debugger  if  you  like  (*), but this is a complete separate
product and has nothing to to with the RPXlite.

(*) IMHO your money is better spent if you buy a BDI2000 instead.

> everything into the flash memory, I wanted to test it by loading it into the 
> ram and execute the binary file.  ( the same way I do when I want to run 

This cannot be done easily (*), and if  you  read  the  mailing  list
archive you will find why.

(*) "Not easily" means that you cannot do it if you have to  ask  why
    it's  not working or what needs to be done to get it working. And
    if you know these things, you will not do it because then  you'll
    also understand that it doesn't allow you to perform the test you
    are looking for.

> better, but it did'nt.  I guess that's why I'm looking for someone who could 
> give me a few hints about how to run u-boot.  

This is writtenin the docs: burn it into flash, and reset the board.

> As I understand it (and maybe this is where my problem is) I am supposed to be 
> able tu run u-boot's binary (or s-record image) directly from the ram. Now, 

No, you are NOT supposed to. There is not a single place in the  docs
which even faintly suggests this.

> I know these questions might sound "newbee" to you guys, but I really need to 

Just stick with the written documentation, and  follow  it  verbatim;
don't speculate.

> know if this code is suppose to work alone, without any kernel, or it 
> absolutly need to work under linux (a bit like when you run lilo from a 
> "normal-i386" linux box)

You are confused. Running the "lilo" comand under Linux  has  nothing
to  do  with  running  the  "lilo"  boot  loader.  These  are totally
different programs.

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
Another megabytes the dust.