[U-Boot-Users] U-Boot-NG ?

Sascha Hauer s.hauer at pengutronix.de
Tue Jul 3 20:43:14 CEST 2007


On Tue, Jul 03, 2007 at 01:09:36PM -0500, Rune Torgersen wrote:
> > -----Original Message-----
> > From: Grant Likely
> > > Do we really need console output before U-Boot has 
> > initialised SDRAM?
> > > For debugging some simple PUTC() and PUTHEX() macros would be
> > > sufficient. Of course they have to be disabled on systems 
> > designed to
> > > have a quiet console.
> > 
> > I think it is a good idea to at least default to spitting out
> > *something* on boot.  Just in case RAM is hooped.
> 
> Console output before RAM is initialized is EXTREMELY important. I thin
> on our boards, 90% of the output on boot is before RAM is initalized.
> And when you try to bring up a new board, you definetly need it.

Perhaps because the comment before board_init_f() does not tell the
truth:

 *
 * The main purpose is to provide a (serial) console interface as
 * soon as possible (so we can see any error messages), and to
 * initialize the RAM so that we can relocate the monitor code to
 * RAM.

In fact 90% of the init process happen here. This function does not even
exist in my approach.

Regards
   Sascha


-- 
Pengutronix - Linux Solutions for Science and Industry
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