Re: [ECOS] Changing the default boot flash device in Redboot

[Andrew Lunn <andrew at lunn dot ch>]

On Tue, Nov 30, 2004 at 05:17:42PM -0000, Vanitha Ramaswami wrote:
> 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.

You need to modify the .h and .ldi file in your hals include/pkgconf/
directory. You need to give the address the FLASH is mapped to when
its not at address location 0.

        Andrew

> 
> 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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