From mboxrd@z Thu Jan  1 00:00:00 1970
From: Scott Wood <scottwood@freescale.com>
Date: Mon, 04 Feb 2008 13:17:16 -0600
Subject: [U-Boot-Users] [PPC] PLEASE READ - was: [PATCH] Fix linker
 scripts: add NOLOAD atribute to .bss/.sbss sections
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Wolfgang Denk wrote:
> In message <20080204165640.GC19264@ld0162-tx32.am.freescale.net> you wrote:
>> On Mon, Feb 04, 2008 at 12:32:36AM +0100, Wolfgang Denk wrote:
>>> So far, it is not clear to me what  a  better  choice  for  a  global
>>> register variable could be (i. e. which register we can chose for our
>>> purpose without causing the same or other problems.
>> r2 is generally used for this purpose.
> 
> Hm... R2 is documented to be the TOC pointer?

The ABI document says, "Register r2 is reserved for system use and 
should not be changed by application code."

Linux uses it for the "current" pointer.

-Scott