[ECOS] forwarded message from ilya kovnatsky

[ECOS] forwarded message from ilya kovnatsky

[Jesper Skov]

To : "Jesper Skov" <jskov at redhat dot com>
Subject : Re: 22781
From : "ilya kovnatsky" <ilya at ptgroupinc dot com>
Date : Thu, 9 Aug 2001 17:42:00 -0400
References : <15214.33231.491898.183690@zoftcorp.adsl.dk>

Thanks for the help, it was a not properly setup TLB.

New problem:

The code start running ( 2 threads each has a counter in a loop with a
delay) the counters get to 1
and then it sits in the idle loop.

There are no interupts occuring.

I manualy enabled the decrementer interupt and then both the counters got to
2 and stopped.

which interupt does the scheduler use ?
where in the code does it init the interupts to be used by the scheduler /
task switching?

thanks in advance.


Ilya

----- Original Message -----
From: Jesper Skov <jskov@redhat.com>
To: <bugs@cygnus.com>; <ilya@ptgroupinc.com>
Sent: Monday, August 06, 2001 7:38 AM
Subject: Re: 22781


>
> >I have a board I developed which is almost identical to the FADS
> >board. I have build the toolset and ecos. When ecos is triing to
> >setup the interupt vectors and reads from the SIMASK register, I get
> >a 1200 exception (tlb) eventhough all of the mapping registers are
> >disabled. Note: the excepton occurs in the cyg hal when it calls the
> >UNMASK_INTERUPT routine as soon as it tries to read from the SIMASK
> >register
>
> Maybe because the IMM base is not 0xff000000 as eCos expects. You can
> tell by the value in register 638 (only the 16 MSB bits).
>
> Otherwise I have no idea, sorry. Try asking on the mailing list.
>
> Jesper

Re: [ECOS] forwarded message from ilya kovnatsky

[Jonathan Larmour]

Jesper Skov wrote:
> 
> Subject: Re: 22781
> Date: Thu, 9 Aug 2001 17:42:00 -0400
> From: "ilya kovnatsky" <ilya@ptgroupinc.com>
> To: "Jesper Skov" <jskov@redhat.com>
> References: <15214.33231.491898.183690@zoftcorp.adsl.dk>
> 
> Thanks for the help, it was a not properly setup TLB.
> 
> New problem:
> 
> The code start running ( 2 threads each has a counter in a loop with a
> delay) the counters get to 1
> and then it sits in the idle loop.
> 
> There are no interupts occuring.
> 
> I manualy enabled the decrementer interupt and then both the counters got to
> 2 and stopped.
> 
> which interupt does the scheduler use ?

The decrementer.

> where in the code does it init the interupts to be used by the scheduler /
> task switching?

Cyg_Scheduler::start() enables the interrupts (although in the very next
CVS update, this will be done indirectly withing HAL_THREAD_LOAD_CONTEXT).
This is in kernel/VERSION/src/sched/sched.cxx. The clock interrupt gets
unmasked in kernel/VERSION/src/common/clock.cxx

Jifl
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