Date: Sat, 20 Mar 2010 05:49:06 +0000 (UTC) From: Neel Natu <neel@FreeBSD.org> To: cvs-src-old@freebsd.org 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 Message-ID: <201003200549.o2K5nIQn052743@repoman.freebsd.org>
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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
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