• cpw@sgi.com's avatar
    x86, UV: Correct UV2 BAU destination timeout · ae90c232
    cpw@sgi.com authored
    Correct the UV2 broacast assist unit's destination timeout
    period. And the activation status register in UV2 should be
    tested for a destination timeout with a 4, not a 2.  The values
    for Active versus Timeout were reversed.
    
    This patch is critical for TLB shootdown on an Altix UV2 system
    (i.e. the follow-on to the current Altix UV).
    
     Destination timeout period:
      The period is set in 4 bits of memory-mapped register MISC_CONTROL.
      The left bit toggles base period between 10us and 80us.
      The other 3 bits are the multiplier.
     Decimal 15, hex f, gives the maximum: 7 * 80us
    Signed-off-by: default avatarCliff Wickman <cpw@sgi.com>
    Link: http://lkml.kernel.org/r/20110621122243.117324443@sgi.comSigned-off-by: default avatarIngo Molnar <mingo@elte.hu>
    ae90c232
uv_bau.h 21 KB