From mboxrd@z Thu Jan  1 00:00:00 1970
From: Grant Edwards <grante@visi.com>
To: ecos-discuss@sources.redhat.com
Subject: Re: [ECOS] RedBoot porting
Date: Mon, 08 Jan 2001 07:31:00 -0000
Message-id: <20010108093453.D10230@visi.com>
References: <20010105115220.A2486@visi.com> <20010108092928.I10158@biferten.ma.tech.ascom.ch>
X-SW-Source: 2001-01/msg00078.html

On Mon, Jan 08, 2001 at 09:29:28AM +0100, Andrew Lunn wrote:

> > If I do not want RedBoot to provide any services to user
> > applications, do I still need to implement virtual vector
> > support in my HAL?  [Having application code depend on services
> > available in the boot loader is way too high-risk, since there
> > isn't going to be any way to upgrade the boot loader in the
> > field.]
> 
> Even if you could try to upgrade the boot loader in the field, its
> hard to do. In my case the boot loader is in FLASH. My code has a TFTP
> server running that allows me to download new images into the
> FLASH. The problem with redboot is that you have no control when it
> tries to jump into the ROM.
[...]

That's the main reason I'm thinking about running RedBoot from
RAM (copy from ROM on startup).  Updating flash while you're
running from it is a royal pain.

-- 
Grant Edwards
grante@visi.com