From: Gary Thomas <gary@mlbassoc.com>
To: dorin@gr-303.com
Cc: eCos Discussion <ecos-discuss@ecos.sourceware.org>
Subject: Re: [ECOS] 860T redboot...almost there...but need a bit of help
Date: Sun, 03 Jul 2005 01:02:00 -0000 [thread overview]
Message-ID: <1120352549.31874.26.camel@hermes> (raw)
In-Reply-To: <20050627205507.63757.qmail@web42007.mail.yahoo.com>
On Mon, 2005-06-27 at 13:55 -0700, Michael Dorin wrote:
>
> It has taken a while, working on and off, but I have
> finally made some good progress.
>
> I can build and boot redboot, using the ROMRAM
> configuration.
>
> However, I still need to set the program counter
> to 0x100 through my bdm port. If I power cycle
> the board, it won't boot.
>
> I understand this is because my flash is bigger
> than 1 meg...but how do I remap the reset vectors
> in redboot to land up higher?
Look carefully at one of the other 8xx ports.
Basically how it works is that after reset, the *only* thing
that is mapped in is ROM/FLASH, CS0. You run using this,
up to the point where everything else is set up and then
switch address spaces to match how you've set up the CSx.
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
------------------------------------------------------------
--
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prev parent reply other threads:[~2005-07-03 1:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-27 20:55 Michael Dorin
2005-07-03 1:02 ` Gary Thomas [this message]
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