re: [ECOS] error in hal_thread_load_context

re: [ECOS] error in hal_thread_load_context

[Stefan Sommerfeld]

Hi,

> I want to use eCos on an IBM eval Board with a ppc405ep powerpc processor. 
> So
> I started to change the eCos database and implemented the files which I 
> need
> in my thought. At the moment I want to initialize the board and start the
> helloworld application. I want to initialize the board in single step 
> modus
> with a debugger. Bur in the following part of
> FUNC_START(hal_thread_load_context) the debugger enters the exception mode
> between the steps from 2b888 to 2b88c.
>
>       lwz     r3,CYGARC_PPCREG_MSR(sp)       # merge interrupt state
>    2b87c: 80 61 00 90  lwz r3,144(r1)
>         hal_cpu_int_merge r3
>    2b880: 7c 00 00 a6  mfmsr r0
>    2b884: 50 60 04 20  rlwimi r0,r3,0,16,16
>    2b888: 7c 00 04 ac  sync
>    2b88c: 7c 00 01 24  mtmsr r0
>    2b890: 7c 00 04 ac  sync
>
> If I change r0 manually the debugger goes through without an error. At the
> moment I do not know which file I have to change so that I can normally go 
> on
> with initializing my board.
> Thanks for your helping. If there is anything you want to know please 
> write to
> LarsHerzfeld@gmx.de
>

That sounds like a problem I had with my XScale board. Make sure you have no 
pending IRQ's. Check all IRQ registers (maybe from redboot) and try disable 
possible IRQ sources. Because the "hello world" example is based on main() 
function, it will be started in a new thread and the context change will 
enable the IRQ's.

You could also try the eCos tests. If the basic (from hal) test work and the 
context not, you have the pending IRQ problem.

Bye... 


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[ECOS] error in hal_thread_load_context

[Lars Herzfeld]

Hi Stefan,

thanks for your answer.
I tested to run the basic test of eCos and it seems to function. But there is 
another question. Which result must be written into the status line in the 
summary tab? Do you know a documentation where I can read something about the 
meanings of the different entries?

With kindly regards

Lars
-- 
Lars Herzfeld
Werner-Heisenberg-Weg 108
App: 215

85579 Neubiberg
Germany

Tel: + 49 (0)89-60665751
Mobil: +49 (0)170-4473980

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and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

[ECOS] error in hal_thread_load_context

[Lars Herzfeld]

Hi,

I want to use eCos on an IBM eval Board with a ppc405ep powerpc processor. So 
I started to change the eCos database and implemented the files which I need 
in my thought. At the moment I want to initialize the board and start the 
helloworld application. I want to initialize the board in single step modus 
with a debugger. Bur in the following part of 
FUNC_START(hal_thread_load_context) the debugger enters the exception mode 
between the steps from 2b888 to 2b88c.

      lwz     r3,CYGARC_PPCREG_MSR(sp)       # merge interrupt state
   2b87c:	80 61 00 90 	lwz	r3,144(r1)
        hal_cpu_int_merge r3
   2b880:	7c 00 00 a6 	mfmsr	r0
   2b884:	50 60 04 20 	rlwimi	r0,r3,0,16,16
   2b888:	7c 00 04 ac 	sync	
   2b88c:	7c 00 01 24 	mtmsr	r0
   2b890:	7c 00 04 ac 	sync	

If I change r0 manually the debugger goes through without an error. At the 
moment I do not know which file I have to change so that I can normally go on 
with initializing my board.
Thanks for your helping. If there is anything you want to know please write to 
LarsHerzfeld@gmx.de

Lars
-- 
Lars Herzfeld
Werner-Heisenberg-Weg 108
App: 215

85579 Neubiberg
Germany

Tel: +49 89-60665751
Mobil: +49 170-4473980

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss