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From: Neel Natu <neel@FreeBSD.org>
Date: Sat, 20 Mar 2010 05:49:06 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/mips/include clock.h src/sys/mips/mips tick.c
 src/sys/mips/sibyte sb_machdep.c sb_scd.c sb_scd.h
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neel        2010-03-20 05:49:06 UTC

  FreeBSD src repository

  Modified files:
    sys/mips/include     clock.h 
    sys/mips/mips        tick.c 
    sys/mips/sibyte      sb_machdep.c sb_scd.c sb_scd.h 
  Log:
  SVN rev 205364 on 2010-03-20 05:49:06Z by neel
  
  Sibyte provides a 64-bit read-only counter that counts at half the processor
  frequency. This counter can be accessed coherently from both cores.
  
  Use this as the preferred timecounter for the SWARM kernels.
  
  The CP0 COUNT register is unusable as the timecounter on SMP platforms because
  the COUNT registers on different CPUs are not guaranteed to be in sync.
  
  Revision  Changes    Path
  1.2       +8 -0      src/sys/mips/include/clock.h
  1.8       +5 -0      src/sys/mips/mips/tick.c
  1.8       +30 -0     src/sys/mips/sibyte/sb_machdep.c
  1.4       +9 -0      src/sys/mips/sibyte/sb_scd.c
  1.4       +1 -0      src/sys/mips/sibyte/sb_scd.h