Re: [ECOS] warm boot detection

[Aaron Richardson <aarichar at cisco dot com>]

On Monday 23 June 2003 11:05 am, Jonathan Larmour wrote:
> Aaron Richardson wrote:
> > Is there some way that I can detect if the platform has been cold booted
> > or warm booted?  It would be nice to avoid initializing several things
> > based on this.  The SDRAM scrubbing and any memory testing could be
> > skipped.
>
> Normally people simply rely on the HAL startup type (ROM/RAM etc.) to
> indicate whether this instance should do the initialization. If you mean a
> non-eCos program may have done the init on the other hand...
>
>  >  Also any
> >
> > chips that need to be skipped during a warm boot could be(I have a 21555
> > pci bridge that needs to be skipped).
>
> Surely the best thing is to look at some register in the PCI BIOS to see
> if it's already been initialized?
>
> Or since this is an application specific customisation, just add a bit of
> memory at a common address. Look at how hal_dram_size is treated in the
> ARM arch HAL for example. Just write a magic number into that address when
> booted for the first time and use that to test if it's already been booted
> before.

Thats what I am looking for.  That is how I have handled it in the past.  Ill 
check it out!!

thanks,
Aaron



-- 


Aaron Richardson
aarichar@cisco.com
512-378-1286


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