cvs commit: src/sys/ia64/ia64 exception.S

[Marcel Moolenaar]

marcel      2007-07-30 22:52:52 UTC

  FreeBSD src repository

  Modified files:
    sys/ia64/ia64        exception.S 
  Log:
  o Switch to physical addressing before dereferencing the VHPT
    bucket pointer. The virtual mapping may not be present in the
    translation cache. This will result in a nested TLB fault at
    a place we don't handle (and don't want to handle).
  o Make sure there's a stop after the rfi instruction, otherwise
    its behaviour is undefined.
  o Make sure we switch back to virtual addressing before doing
    a rfi. Behaviour is undefined otherwise.
  
  Approved by: re (blanket)
  
  Revision  Changes    Path
  1.61      +62 -37    src/sys/ia64/ia64/exception.S