Re: [ECOS] Unable to Boot (RedBoot ) standalone

[Ashish Ranjan <ranjan_ash2004 at yahoo dot com>]

--- Andrew Lunn <andrew@lunn.ch> wrote:

> On Fri, Oct 28, 2005 at 12:27:16AM -0700, Ashish
> Ranjan wrote:
> > Hello All,
> > Please help me I have two problems rigth now and i
> am
> > new to ECOS.
> >  
> > I am trying to port redboot on the Card having
> MPC860
> > and startup type is ROM.The card has the SDRAM
> > (0x00000000 - 0x00FFFFFF) and ROM (0x30000000 -
> > 0x303FFFFF).When I program the flash and run the
> > RedBoot.elf through lauterbach(ICD), I get the
> RedBoot
> > prompt on Hyperterminal. But when I power-on the
> Card
> > without the Emulator, i am unable to get the
> RedBoot
> > prompt(nothing happens).
> >  
> > There is one more problem,it happens sometimes.In
> this
> > case,I am unable to the RedBoot prompt. The
> > IP(Instruction Pointer) move to an address
> 0x8001002C
> > and get halted as I have seen with the help of
> > debugger. Problem is : When a address is pushed
> into
> > the stack and when it is poped up the value is not
> the
> > same.Why it happens?what would be the reason?
> 
> This sort of thing generally indicates the SDRAM
> controller
> initialization is broken. It could be your debugger
> is initializing
> the SDRAM controller and getting it correct. But
> when eCos does the
> initialization, it gets is wrong. 
> 
>         Andrew
> 

Thanks for your quick reply sir:
What is the solution means how can I initialize the
SDRAM controller? What would be the step which I
should follow?
And what about booting standalone.Is it due to same
reason?

Ashish




	
		
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