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Re: Problem using "go" command
- From: Deepak Saxena <dsaxena at mvista dot com>
- To: Patrick Doyle <wpd at delcomsys dot com>
- Cc: Peyush Agarwal <peyush at tataelxsi dot co dot in>, lucbolo at excite dot it, linux-arm-kernel at lists dot arm dot linux dot org dot uk, eCos <ecos-discuss at sources dot redhat dot com>
- Date: Fri, 14 Mar 2003 12:23:53 -0700
- Subject: [ECOS] Re: Problem using "go" command
- Organization: MontaVista Software, Inc.
- References: <3E716DAC.818AA627@tataelxsi.co.in> <NFBBJAJICAKJPMMKDAGBIELPDMAA.wpd@delcomsys.com>
- Reply-to: dsaxena at mvista dot com
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 at tataelxsi dot co dot in]
> > Sent: Friday, March 14, 2003 12:51 AM
> > To: wpd at delcomsys dot com; lucbolo at excite dot it;
> > linux-arm-kernel at lists dot arm dot linux dot org dot 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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