[ECOS] Re: Problem using "go" command

Deepak Saxena dsaxena@mvista.com
Fri Mar 14 19:28:00 GMT 2003


Which UART do you have your serial cable connected to? RedBoot
will use both UART ports for communications, but Linux is
configured to use UART0 (ttyS0).

~Deepak

On Mar 14 2003, at 13:46, Patrick Doyle was caught saying:
> I am not familiar with the RedBoot port to the IXP-425, but, most likely,
> you should use the "exec" command instead of the "go" command.  I am
> cross-posting this to ecos-discuss where, hopefully, somebody with
> experience with the IXP-425 can chime in.
> 
> Does the IXP-425 have an MMU? (if you want to run Linux, the 10 sigma answer
> is "yes")
> 
> Does the RedBoot port enable the MMU? -- if it does, then you must use the
> "exec" command to start up Linux.  Linux expects that the MMU is disabled at
> startup (see Documentation/arm/booting).  The "exec" command disables the
> MMU, sets up the kernel parameters tag table, and then branches to the
> kernel entry point.
> 
> Note that, even if RedBoot doesn't use the MMU, you will still probably need
> to use the "exec" command in order to pass the correct machine ID and tag
> table to the kernel.
> 
> Perhaps this will help.  Good luck.
> 
> --wpd
> 
> 
> > -----Original Message-----
> > From: Peyush Agarwal [mailto:peyush@tataelxsi.co.in]
> > Sent: Friday, March 14, 2003 12:51 AM
> > To: wpd@delcomsys.com; lucbolo@excite.it;
> > linux-arm-kernel@lists.arm.linux.org.uk
> > Subject: Problem using "go" command
> >
> >
> > Hello,
> >
> > I am using 'Redboot.bin' as the boot loader for IXP-425. I am able to
> > download the 'zImage' as well as the 'ramdisk.gz' image to the
> > appropriate location. But once I type "go 0x11600000" command from the
> > Redboot prompt the system hangs.
> >
> > Can anyone suggest what could be the problem.
> > Thanks.
> > Regadrs.
> > Peyush.
> >
> > --
> > ______________________________________________________________
> > Peyush Agarwal
> > Sr. Engineer, Networking and Communications, Tata Elxsi Ltd.
> > Phone number :: 91-80-8410220/1/2 ex. 236.  Fax ::  91-80-8410219.
> > www.tataelxsi.com
> > ______________________________________________________________
> >
> >
> 
> 
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-- 
Deepak Saxena
MontaVista Software - Powering the Embedded Revolution - www.mvista.com


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