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Re: Hitachi SH7709A problems
- To: ecos-discuss at sourceware dot cygnus dot com
- Subject: Re: [ECOS] Hitachi SH7709A problems
- From: Peter Graf <p dot graf at itknet dot de>
- Date: Fri, 12 Jan 2001 12:46:29 +0100
- References: <pg-itk@t-online.de's message of "Mon, 20 Nov 2000 16:18:46 +0100"><pg-itk@t-online.de's message of "Mon, 20 Nov 2000 14:36:31 +0100"><Jesper Skov's message of "Fri, 17 Nov 2000 11:11:19 +0100"><14869.1095.188352.237035@thinktwice.zoftcorp.dk><3.0.5.32.20001120143631.008fc8b0@pop.btx.dtag.de><3.0.5.32.20001120161846.008fed80@pop.btx.dtag.de>
Hi Jesper,
sorry for the late reply, have been away from office for some time.
>Peter> 2. ROMs compiled in ROMRAM startup mode don't work anymore,
>Peter> although the pure ROM versions work. The ROMRAM feature has
>Peter> also worked fine using earlier sources.
>>> I may have broken something when the code was split into variant
>>> HALs. I probably won't have time to look at it until next year
>>> though - so if it's something you need working ASAP, you are
>>> probably best of (a) figuring out why it fails on your own, or (b)
>>> revert to the older codebase. Sorry.
>
>Peter> I've already started (a), but debugging by burning Flashroms is
>Peter> quite tough. I'll let you know if I find something.
>
>Did you find the problem? It was the initial jump instruction at the
>image entry address. It was fixed in late December in the CVS tree.
Thank you very much for fixing the ROMRAM problem.
But no I didn't find it, seems I've looked at the wrong places. I gave up
the "ROMRAM" target. I started writing flash drivers and using Redboot
instead. Which I have now running (using a serial port) on our hardware. I
load a "RAM" binary from FIS, which is a good replacement for "ROMRAM" (and
more :-)). Pretty feature to be able to use the same code for debugging in
RAM and for the production version loaded from flash.
All the best
Peter