[U-Boot-Users] need some help

[U-Boot-Users] need some help

[Timothy Rosario]

Hi, this is a plead for someone to answer me or at least tell me  
where to go for help. I am trying to get a simple hello world going  
on a new CPU & board. I have a NuCore device similar to the s3c2410A.  
I bought the Embest board to see if that would help but it hasn't. I  
have posted a few questions in the past with no answers. Can someone  
help out a newbie please? I am not new to linux or embedded systems  
just to u-boot and this processor...

Thanks,
Tim

[U-Boot-Users] need some help

[David Hawkins]

Hi Tim,

> Hi, this is a plead for someone to answer me or at least tell me  
> where to go for help. I am trying to get a simple hello world going  
> on a new CPU & board. I have a NuCore device similar to the s3c2410A.  
> I bought the Embest board to see if that would help but it hasn't. I  
> have posted a few questions in the past with no answers. Can someone  
> help out a newbie please? I am not new to linux or embedded systems  
> just to u-boot and this processor...


There are plenty of people here that would help. However,
you can't expect 'generic' help. You need to be specific
about your problems. For example, most of us would have
no idea what a s3c2410A is, sure we could find it with
Google, but save us the trouble. ... ARM920T core.

Getting a 'simple hello world' could mean you are trying to
boot a processor from scratch and get hello world coming
out the serial console, or it could mean you are writing
a u-boot standalone application and can't get it to work.

I'm assuming you've read through all the excellent docs
on Denx's web site.

Here's a copy of my U-Boot walk-thru's on a couple of PowerPC
boards, and another on bare-metal experiments with gcc on an
ARM 7TDMI core ...

PowerPC stuff;

http://www.ovro.caltech.edu/~dwh/powerpc_mpc8349e.pdf
http://www.ovro.caltech.edu/~dwh/powerpc_440ep.pdf

ARM stuff;
http://www.ovro.caltech.edu/~dwh/ucos/project_AR1803.pdf
http://www.ovro.caltech.edu/~dwh/ucos/

The PowerPC stuff has an example of a U-Boot standalone app,
while the bare-metal stuff has blinking LEDs etc.

Cheers
Dave

[U-Boot-Users] Need Some Help

[Mondesir, Alshine]

My latest endaevor has me cross compiling a stand alone application for
MPC8548 PPC for a U-Boot Based target.  There is no Operating System to
run on the target to speak of, just my application.  I'm building the
application in Code Warrior using an 8548_init.S hardware intialization
file.

 

1) My first thought was that this should be as simple as using the .ELF
image that codewarrior produces, right?  So I build a simple hello_world
application and sent it down to my target.  U-Boot recognizes it as an
ELF image, sets up the segements, and tries to run it!  But then low and
behold, the U-Boot flash image comes up again. 

 

=> bootelf 400000

Loading .init @ 0x00002000 (972 bytes)

Loading .text @ 0x000023d0 (7624 bytes)

Loading .rodata @ 0x00004198 (256 bytes)

Loading .ctors @ 0x00004298 (8 bytes)

Loading .dtors @ 0x000042a0 (8 bytes)

Loading extab @ 0x000042a8 (16 bytes)

Loading extabindex @ 0x000042b8 (72 bytes)

Loading .data @ 0x00004300 (1024 bytes)

Loading .sdata @ 0x00004700 (44 bytes)

Clearing .sbss @ 0x00004730 (28 bytes)

Clearing .bss @ 0x00004750 (784 bytes)

Loading .abs.00000c00 @ 0x00000c00 (244 bytes)

## Starting application at 0x00002044 ...

 

U-Boot 1.3.0 (Jul 21 2008 - 12:20:51)

 

CPU:   8548_E, Version: 2.1, (0x80390021)

Core:  E500, Version: 2.2, (0x80210022)

Clock Configuration:

 

2) My next thought was to try and wrap it as a stand alone application
image using "mkimage"  Ok, Great   To no avail....

 

$ mkimage -A ppc -O u-boot -T standalone -C none -a 2000 -e 2044 -n
"Hiya stranger" -d debug.bin uDebug.bin              

 

## Total Size      = 0x00003ea0 = 16032 Bytes

=> bootm 400000

## Booting image at 00400000 ...

   Image Name:   Hiya stranger

   Image Type:   PowerPC U-Boot Standalone Program (uncompressed)

   Data Size:    15968 Bytes = 15.6 kB

   Load Address: 00002000

   Entry Point:  00002044

   Verifying Checksum ... OK

OK

**bleep**: 00000000 XER: 20000000 LR: 0FFD6378 REGS: 0ff9dc98 TRAP: 0700
DAR: 00000000

MSR: 00021200 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00

 

GPR00: 0FFD634C 0FF9DD88 00000200 00000001 0FFA048C 00000000 00005E5C
00000000

GPR08: 00000000 0FF9E00C 00000170 0FFD398C 0FF9DB70 0000C700 0FFF9A00
10040000

GPR16: 00000000 0FFEC9B4 00000000 00400040 00000001 00400000 00000000
00000001

GPR24: 0FFF52F8 0FFA0488 00000002 00002044 00400040 0FF9DF80 0FFFA2AC
00400000

** Illegal Instruction **

Call backtrace:

0FFD634C 0FFE3790 0FFE28E4 0FFE2D54 0FFD4600 0FFCABC8 0FFC162C

Program Check Exception

**bleep**: 0

 

How do I go about exporting my code warrior application so that I can
run it as stand-alone on a U-Boot based target?  Thanks so much

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[U-Boot-Users] Need Some Help

[Ken.Fuchs at bench.com]

Please do not use HTML on this mailing list.  All
messages to this list must be in plain text.

Mondesir, Alshine wrote:

> My latest endeavor has me cross compiling a stand
> alone application for > MPC8548 PPC for a U-Boot
> Based target.  There is no Operating System to
> run on the target to speak of, just my application.
> I'm building the application in Code Warrior
> using an 8548_init.S hardware initialization file.
 
> 1) My first thought was that this should be as
> simple as using the .ELF image that codewarrior
> produces, right?  So I build a simple hello_world
> application and sent it down to my target.  U-Boot
> recognizes it as an ELF image, sets up the
> segments, and tries to run it!  But then low and
> behold, the U-Boot flash image comes up again. 
 
> => bootelf 400000

> => bootm 400000
 
> How do I go about exporting my code warrior
> application so that I can run it as stand-alone
> on a U-Boot based target?  Thanks so much

I suspect that your application is using a device
or resource that neither U-Boot nor your
application have properly initialized.

What is your display device for your hello_world
application?  Where is this device initialized?

Sincerely,

Ken Fuchs

[U-Boot-Users] Need Some Help

[Jerry Van Baren]

Ken.Fuchs at bench.com wrote:
> Please do not use HTML on this mailing list.  All
> messages to this list must be in plain text.
> 
> Mondesir, Alshine wrote:
> 
>> My latest endeavor has me cross compiling a stand
>> alone application for > MPC8548 PPC for a U-Boot
>> Based target.  There is no Operating System to
>> run on the target to speak of, just my application.
>> I'm building the application in Code Warrior
>> using an 8548_init.S hardware initialization file.
>  
>> 1) My first thought was that this should be as
>> simple as using the .ELF image that codewarrior
>> produces, right?  So I build a simple hello_world
>> application and sent it down to my target.  U-Boot
>> recognizes it as an ELF image, sets up the
>> segments, and tries to run it!  But then low and
>> behold, the U-Boot flash image comes up again. 
>  
>> => bootelf 400000
> 
>> => bootm 400000
>  
>> How do I go about exporting my code warrior
>> application so that I can run it as stand-alone
>> on a U-Boot based target?  Thanks so much
> 
> I suspect that your application is using a device
> or resource that neither U-Boot nor your
> application have properly initialized.
> 
> What is your display device for your hello_world
> application?  Where is this device initialized?
> 
> Sincerely,
> 
> Ken Fuchs

...and are you (Alshine) loading your application in a valid location? 
I see 0x00002000 and following.  I suspect those locations are used by 
your version of u-boot.  You probably want to link your test app at 
0x400000 or somewhere up high like that.

>> => bootelf 400000
>> Loading .init @ 0x00002000 (972 bytes)

[snip]

>> ## Starting application at 0x00002044 ...

gvb

[U-Boot-Users] Need Some Help

[Wolfgang Denk]

In message <7F4C091727699947ACBAB0410268C5D92B2FDB@VS11.EXCHPROD.USA.NET> you wrote:
> 
> My latest endaevor has me cross compiling a stand alone application for
> MPC8548 PPC for a U-Boot Based target.  There is no Operating System to
> run on the target to speak of, just my application.  I'm building the
> application in Code Warrior using an 8548_init.S hardware intialization
> file.

What has this file to do with U-Boot? Nothing! Forget about it.

> 1) My first thought was that this should be as simple as using the .ELF
> image that codewarrior produces, right?  So I build a simple hello_world

I have no idea what CW produces. You should use the U-Boot Makefile
and linker scripts.

> application and sent it down to my target.  U-Boot recognizes it as an
> ELF image, sets up the segements, and tries to run it!  But then low and

Who says so?

> behold, the U-Boot flash image comes up again.

That's to be expected.

Guess it's time for you to start reading the fine manual, especially
the section about standalone applications.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
It is impractical for  the  standard  to  attempt  to  constrain  the
behavior  of code that does not obey the constraints of the standard.
                                                          - Doug Gwyn

[U-Boot-Users] Need Some Help

[Alshine Mondesir]

Wolfgang Denk,

Thanks for the reply, but I have a few questions.
The first is can U-boot load any application other than a Linux.
I simply want to use u-boot as a boot loader, to load a non-Linux app into
memory and jump to that app with or without uboot's hardware init. The
second wuestion is where can I get some help in doing just that, if it's
possible? I don't want to have to build and cross-compile my app in Linux in
order for u-boot to load it. Third, if I have to compile my app in Linux,
can I simply use mkimage with the hello world binary and do a bootm from
that?

Thanks in adavance,


Alshine Mondesir
Firmware Engineer
xG Technology Inc.
7771 W. Oakland Park Blvd, Sunrise, FL 33351
Tel: 954-572-0395 ext 3323
Fax: 954-572-0397
http://www.xgtechnology.com
-----Original Message-----
From: wd@denx.de [mailto:wd at denx.de] 
Sent: Wednesday, July 23, 2008 11:18 PM
To: Mondesir, Alshine
Cc: u-boot-users at lists.sourceforge.net
Subject: Re: [U-Boot-Users] Need Some Help

In message <7F4C091727699947ACBAB0410268C5D92B2FDB@VS11.EXCHPROD.USA.NET>
you wrote:
> 
> My latest endaevor has me cross compiling a stand alone application for
> MPC8548 PPC for a U-Boot Based target.  There is no Operating System to
> run on the target to speak of, just my application.  I'm building the
> application in Code Warrior using an 8548_init.S hardware intialization
> file.

What has this file to do with U-Boot? Nothing! Forget about it.

> 1) My first thought was that this should be as simple as using the .ELF
> image that codewarrior produces, right?  So I build a simple hello_world

I have no idea what CW produces. You should use the U-Boot Makefile
and linker scripts.

> application and sent it down to my target.  U-Boot recognizes it as an
> ELF image, sets up the segements, and tries to run it!  But then low and

Who says so?

> behold, the U-Boot flash image comes up again.

That's to be expected.

Guess it's time for you to start reading the fine manual, especially
the section about standalone applications.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
It is impractical for  the  standard  to  attempt  to  constrain  the
behavior  of code that does not obey the constraints of the standard.
                                                          - Doug Gwyn

[U-Boot-Users] Need Some Help

[Wolfgang Denk]

In message <004a01c8f403$f1a4d590$d4ee80b0$@com> you wrote:
> 
> Thanks for the reply, but I have a few questions.
> The first is can U-boot load any application other than a Linux.

Of course it can. If you had read the manual, you should  have  found
the  section about standalone applications. And of course it can boot
a couple of other operating systems as  well,  which,  from  U-Boot's
point of view, are just different applications.

> I simply want to use u-boot as a boot loader, to load a non-Linux app into
> memory and jump to that app with or without uboot's hardware init. The

If you want to avoid U-Boot's hardware init, then run your application
on the raw hardware without U-Boot. But be prepared that then you have
to reinvent all the needed hardware init steps yourself.

> second wuestion is where can I get some help in doing just that, if it's
> possible? I don't want to have to build and cross-compile my app in Linux in
> order for u-boot to load it. Third, if I have to compile my app in Linux,
> can I simply use mkimage with the hello world binary and do a bootm from
> that?

May I suggest that you just read the related sections in the  manual?
It  comes  with  a couple of examples which show exactly what you are
asking for.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
If programming was easy, they wouldn't need something as  complicated
as a human being to do it, now would they?
                       - L. Wall & R. L. Schwartz, _Programming Perl_