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RE: initial bootstrap and jtag

To: "Ed Okerson" <>, "Clem Taylor" <>
Subject: RE: initial bootstrap and jtag
From: "Joseph Chiu" <>
Date: Mon, 31 Jan 2005 13:53:26 -0800
Cc: <>
Original-recipient: rfc822;
Thread-index: AcUH2eaZWFIQHzrBQxSqTuMpHI3a/wABWxVw
Thread-topic: initial bootstrap and jtag
Hi Ed,
What kinds of patching did you have to do in the source code except for the 
MIPS endian-registers?  I've made such changes plus little-endian-fied the 
build scripts/linker scripts/makefile/etc. but haven't yet had u-boot working.  
I'm assuming that outside of the bootstrapping, the code is endian-independant. 
 Am I wrong?

> -----Original Message-----
> From:
> []On Behalf Of Ed Okerson
> Sent: Monday, January 31, 2005 1:15 PM
> To: Clem Taylor
> Cc:
> Subject: Re: initial bootstrap and jtag
> I use the BDI-2000 for an AU1500 based board.  For the boot 
> loader I found
> u-boot to be very functional.  It did require a bit of 
> patching to handle
> the Au1500 in little endian mode, but since that is now done 
> everything
> works great.
> Ed Okerson
> > We are finishing up the design of our new Au1550 based board. I was
> > wondering if someone could recommend an ejtag wiggler. I need
> > something that has full linux host support, is good enough 
> to flash a
> > bootloader and do some minimal debug while getting the board support
> > working. Looking over the list some people seem to be using the
> > Abatron BDI 2000 and others are using the Macraigor mpDemon. What do
> > you guys recommend?
> >
> > This is my first time doing embedded linux, but I've done 
> quite a bit
> > with DSPs (written bootloaders, flash programmers, etc). I was
> > wondering how people go about bootstrapping new Au1xxx 
> systems. Who is
> > responsible for configuring the PLL or SDRAM enough to allow code to
> > be loaded into SDRAM? Are bootloaders like YAMON position 
> independent
> > to run out of SDRAM?
> >
> >                                      Thanks,
> >                                      Clem
> >

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