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From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] Add mpc5125ads board and processor to the mpc512x family
Date: Tue, 20 Oct 2009 23:58:09 +0200	[thread overview]
Message-ID: <20091020215810.00F4C1A00B@gemini.denx.de> (raw)
In-Reply-To: <4b73d43f0910191545x3127cba5w7fdec3f6382138e3@mail.gmail.com>

Dear John,

In message <4b73d43f0910191545x3127cba5w7fdec3f6382138e3@mail.gmail.com> you wrote:
> 
> The register map for 5125 does not just change the size of the registers.
> Some registers change locations.  The issue is that the hardware guys
> decided to "fix" the old broken register access.  The 5200, 5121, 5123 had
> some registers that were:

I always stand fascinated about the inventiveness of these guys; even
when just releasing a new chip from one family where one would expect
basicly upward-compatibility they  find  ways  not  to  simplify  the
design but to make it more complex and wonderful. Nobody else does so
much to save our jobs. 

> So the problem is painful but I believe doable.  The problem I never
> resolved was dealing with this mess in linux where the same binary has to
> work with both platforms.  I decided that the register accesses needed to be
> done via an offsets array that was populated at run time but I never got
> around to implementing that.

Heh. I don't envy the guy who has to do this.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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  reply	other threads:[~2009-10-20 21:58 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-13 17:45 [U-Boot] [PATCH] Add mpc5125ads board and processor to the mpc512x family m stan
2009-10-18 19:46 ` Wolfgang Denk
2009-10-19 22:45   ` John Rigby
2009-10-20 21:58     ` Wolfgang Denk [this message]
2009-10-21 15:20     ` Kenneth Johansson
  -- strict thread matches above, loose matches on Subject: below --
2009-10-20 13:53 m stan
2009-10-20 20:57 ` Wolfgang Denk
2009-10-08  7:40 Martha Stan
2009-10-13 10:02 ` Wolfgang Denk
2009-10-04 14:20 m marx
2009-10-04 15:44 ` Wolfgang Denk
2009-09-21 20:27 Martha M Stan
2009-09-21 21:09 ` Fabio Estevam
2009-10-03 22:43 ` Wolfgang Denk

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