From owner-cvs-all  Sat May 29 12:48: 9 1999
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From: Andrew Gallatin <gallatin@FreeBSD.org>
Date: Sat, 29 May 1999 12:47:53 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/alpha/alpha mem.c
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gallatin    1999/05/29 12:47:53 PDT

  Modified files:
    sys/alpha/alpha      mem.c 
  Log:
  When memory mapping a PCI device (like XFree86 does) on an XP1000, we must
  use ALPHA_PHYS_TO_K0SEG(offset) rather than just plain offet.  I've verified
  that this does not break other platforms (I've tested an AlphaStation 200
  and a Personal Workstation 500au with this patch).
  
  As to why this works, well.. Its black magic as far as I know.  I obtained
  this hack from Myricom, who in turn, obtained it from Compaq engineers.
  Without this hack, XFree86 cannot talk to a PCI graphics card.
  
  Reviewed by:	Doug Rabson <dfr@nlsystems.com>
  Obtained from:  feldy@myri.com (Bob Felderman)
  
  Revision  Changes    Path
  1.8       +2 -2      src/sys/alpha/alpha/mem.c



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