cvs commit: src/sys/powerpc/powerpc pmap.c

[Peter Grehan]

grehan      2005-11-07 06:55:48 UTC

  FreeBSD src repository

  Modified files:
    sys/powerpc/powerpc  pmap.c 
  Log:
  Finally (!?) get to the bottom of the mysterious G3 boot-time panics.
  After a number of tests using nop's to change the alignment, it was
  confirmed that the mtibat instructions should be cache-aligned.
  FreeScale app note AN2540 indicates that the isync before and after
  the mtdbat is the right thing to do, but sync/isync isn't required
  before the mtibat so it has been removed.
  
  Fix by using a ".balign 32" to pull the code in question to the correct
  alignment.
  
  MFC after:      3 days
  
  Revision  Changes    Path
  1.102     +1 -1      src/sys/powerpc/powerpc/pmap.c