[U-Boot-Users] Univesal bootloader in 2 stages

[Brian Waite <linwoes@gmail.com>]

I would reccommend getting a stable version of u-boot and having your
FLASH chips preprogrammed. I do this and basically the initial FLASH
load will determine if this is the first time it's been run and if so
will tftp a script over that updates u-boot to the most current
shipping version and does any other mojo I might need to do.

Also, as WD suggested, using a workspace allows my BDI to xfer
~100K/second. If you are trying have so many boards that 2 seconds a
board is too long, then get your chips preprogammed.

Thanks
Brian


On Fri, 05 Nov 2004 17:22:44 +0100, Wolfgang Denk <wd@denx.de> wrote:
> In message <000001c4c326$64d54ad0$4501a8c0@bgcw301> you wrote:
> >
> > Since my hardware is customized, to run the hardware for the very first
> > time with a bootloader, programming 200K will take a lot more time with
> > a JTAG interface [Thinking from manufacturing angle]. That's the
> > reason
> 
> Did you actually measure the time it takes to progam the  200  kB  of
> U-Boot  using  a  BDi2000  with  an optimized config file (i. e. with
> workspace enabled)?
> 
> And did you then estimate the time you  need  to  program  your  mini
> loader,  to load the real image over the network, and then to program
> the real image to flash?
> 
> Do you really expect this to be faster?
> 
> I will not be convinced before I see actual numbers.
> 
> > I wanted to have the bootloader to be split into 2.[So that programming
> > only around 10K will not take a lot of time compared to the whole
> > bootloader].
> 
> If you really manage to get a boot  loader  with  support  for  flash
> programming  and  TFTP  download  in 10 kB I really would like to see
> your code. I'm willing to throw out all flash and network drivers  in
> U-Boot and replace them with your code.
> 
> > Do you have any suggestion for this type of a scenario?
> 
> Sorry, no. I don't know how to provide such a solution.
> 
> Best regards,
> 
> Wolfgang Denk
> 
> --
> See us @ Embedded/Electronica Munich, Nov 09 - 12, Hall A.6 Booth 513
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> Technology is dominated by those who manage what they do  not  under-
> stand.
> 
> 
> 
> 
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