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RE: Changing the default boot flash device in Redboot


Hello,

The hardware person says there is a jumper in our custom IXP425 board, that will allow us to boot from IXP425 Flash located on CS1.
Can you tell me, what changes should i do to redboot to boot from the flash in CS1.

THanks
Vanitha

On Tuesday, October 05, 2004 4:59 PM, Andrew Lunn [SMTP:andrew@lunn.ch] wrote:
> On Tue, Oct 05, 2004 at 04:50:53PM -0000, Vanitha Ramaswami wrote:
> > Hi All,
> > 
> > I want to change the default boot flash device changed to another flash 
> > chip located in CS1 in my IXP425 reference platform. The version of redboot 
> > i have right now boots from the flash located in CS0. Where should i change 
> > in redboot in order to boot from the flash chip located in CS1 ?  I am able 
> > to recompile the redboot source and run in my platform. Can you tell the 
> > places where should i look at to change the default boot flash chip?
> 
> Before changing the software, i have another question. Is the hardware
> capable of booting from a different address?
> 
> Normally at boot time the flash is mapped to address 0. Early on in
> the boot sequence this mapping is changed to that there is RAM at
> address 0. Can you control the hardware which does this mapping so
> that it maps a different flash device to 0 at boot time? Is there a
> jumper on the board?
> 
>         Andrew
> 

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