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From: Peter Grehan <grehan@FreeBSD.org>
Date: Sun, 30 Oct 2005 21:29:59 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Cc: 
Subject: cvs commit: src/sys/powerpc/powerpc locore.S ofw_machdep.c
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grehan      2005-10-30 21:29:59 UTC

  FreeBSD src repository

  Modified files:
    sys/powerpc/powerpc  locore.S ofw_machdep.c 
  Log:
  Copy SPRG0-3 registers at boot-time and restore when calling into
  OpenFirmware. FreeBSD/ppc uses SPRG0 as the per-cpu data area pointer,
  and SPRG1-3 as temporary registers during exception handling. There
  have been a few instances where OpenFirmware does require these to
  be part of it's context, such as cd-booting an eMac.
  
  reported by:    many
  MFC after:      3 days
  
  Revision  Changes    Path
  1.22      +11 -2     src/sys/powerpc/powerpc/locore.S
  1.14      +46 -4     src/sys/powerpc/powerpc/ofw_machdep.c