[U-Boot] Problem executing hello world as specified on wiki

[Vipul Jain]

Hi Wolfgang,

Some of the things that I have tried and would like to  share with you.

1. I read doc/README.standalone and it does mention default load addr and
start addr
    of standalone application for various architecture.
   [Snippet]
   4. The default load and start addresses of the applications are as
      follows:

                      Load address    Start address
    x86              0x00040000  0x00040000
    PowerPC     0x00040000  0x00040004
    ARM            0x0c100000  0x0c100000
    MIPS           0x80200000  0x80200000
    Blackfin       0x00001000  0x00001000

[end of snippet]

2. as mine is ARM, I know that only file I am interested in is
examples/standalone/hello_world
    why? because its in ARM ELF format.
   vipul at Gladiator:~/World/u-boot$ file examples/standalone/hello_world
examples/standalone/hello_world: ELF 32-bit LSB executable, ARM, version 1
(SYSV), statically linked, not stripped

3. Now that I know the load addr, start addr and right hello_world file to
use, I did the following

EDB9302> tftp 0x0c100000 /tftpboot/hello_world
Using ep93xx_eth-0 device
TFTP from server 192.168.15.6; our IP address is 192.168.15.15
Filename '/tftpboot/hello_world'.
Load address: 0xc100000
Loading: ########
done
Bytes transferred = 37756 (937c hex)
EDB9302> go 0x0c100000

4. Result. I still see a panic. I am not sure what part I am missing. I was
wondering if you could provide
your kind guidance.


Regards,
Vipul.


On Sun, Feb 21, 2010 at 4:11 PM, Vipul Jain <vipulsj at gmail.com> wrote:

> Hi Wolfgang,
>
>    I am totally newbie in u-boot who is trying to learn how to
> write/execute standlone application
> and as to start with learning I just blankly followed the steps I found on
> U-Boot twiki and on google. I
> personally don't know what those address mean. But would be very kind of
> you if you could please
> kindly help me understand what's the right way to learn which address to
> use and or how can I
> find this out?
>
> You are correct I am using EDB9302 motherboard which is based on ARM920T
> processsor.
> Please kindly help me.
>
>
> Regards,
> Vipul.
>
>
> On Sun, Feb 21, 2010 at 3:22 PM, Wolfgang Denk <wd at denx.de> wrote:
>
>> Dear Vipul Jain,
>>
>> In message <b178b0fc1002211514n40ca7c7v1dd248612e6ba87 at mail.gmail.com>
>> you wrote:
>> >
>> >    I am trying to execute the standlone examples of hello world by
>> following
>> > the steps
>> > specified at the U-Boot wiki but have no success. This is what I am
>> getting.
>>
>> You must not just follow the steps without thinking.
>>
>> > Method 1:
>> > ---------------
>> > EDB9302> tftp 40000 /tftpboot/hello_world.srec
>>
>> What makes you think this is the correct download address?
>>
>> > Using ep93xx_eth-0 device
>>
>> ep93xx? Sounds line an ARM system to me. Are you sure you have RAM at
>> this address, and that this is the correct address for this standalone
>> app?
>>
>> > EDB9302> loadb 0x100000
>> > ## Ready for binary (kermit) download to 0x00100000 at 115200 bps...
>>
>> What makes you think this is the correct download address?
>>
>>
>> > Please help me, how can I test simple hello world program like this on
>> > U-Boot.
>>
>> Well, if you continue trying random addresses you will probably
>> continue getting random results.
>>
>> Please read the FAQ:
>> http://www.denx.de/wiki/view/DULG/MyStandaloneProgramDoesNotWork
>>
>> Then think about your sytem, nd check the load and entry point
>> addresses.
>>
>> Best regards,
>>
>> Wolfgang Denk
>>
>>
>