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Re: Calibrating delay loop... crashes

To: Nguyen Thanh Binh <n_tbinh@yahoo.com>, "Kevin D. Kissell" <kevink@mips.com>
Subject: Re: Calibrating delay loop... crashes
From: Manish Lachwani <m_lachwani@yahoo.com>
Date: Tue, 15 Nov 2005 18:24:39 -0800 (PST)
Cc: linux-mips@linux-mips.org
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Hi !

There is a porting guide at:

http://linux.junsun.net/porting-howto/

which is quite useful. Read the "System time and
timer" section. It describes to some extent
implementing timer services.

Thanks
Manish Lachwani



--- Nguyen Thanh Binh <n_tbinh@yahoo.com> wrote:

> Hi Kevin,
> 
> > > When booting Monta Vista Linux on Memec board
> > > (Virtex-4 FX12 LC), it crashed after printing
> the
> > > following message:
> > > 
> > >     "Calibrating delay loop..."
> > > 
> > > By looking at the source code, I found that in
> the
> > > init/main.c the problem came from the
> > calibrate_delay
> > > function: jiffies was not incremented (jiffies
> was
> > > always equal to 0).
> > > 
> > > Have anyone get the similar problem or any
> > experience
> > > to fix it?
> > 
> > I take it that by "crashed", you mean it hung?  If
> > so,
> > it sounds like you aren't getting any timer
> > interrupts.
> 
> You are right. Because jiffies was not incremented
> so
> the below code segment in function calibrate_delay
> in
> file init/mian.c hung:
> 
>    ticks = jiffies;
>    while (ticks == jiffies) ;
> 
> As I am a newbie, I did not find how to fix it.
> 
> Thank you for any help.
> 
> Binh Nguyen
> 
> Nguy&#7877;n Thanh Bình
> 
> 
>               
>
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