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From: Steve Passe <fsmp@FreeBSD.ORG>
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	Sat, 30 Aug 1997 20:17:50 -0700 (PDT)
Date: Sat, 30 Aug 1997 20:17:50 -0700 (PDT)
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To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG
Subject: cvs commit: src/sys/i386/include lock.h smptests.h
         src/sys/i386/isa sio.c src/sys/i386/i386 mp_machdep.c simplelock.s
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fsmp        1997/08/30 20:17:50 PDT

  Modified files:
    sys/i386/include     lock.h smptests.h 
    sys/i386/i386        mp_machdep.c simplelock.s 
  Log:
  Debug version of simple_lock.  This will store the CPU id of the
  holding CPU along with the lock.  When a CPU fails to get the lock
  it compares its own id to the holder id.  If they are the same it
  panic()s, as simple locks are binary, and this would cause a deadlock.
  
  Controlled by smptests.h: SL_DEBUG, ON by default.
  
  Some minor cleanup.
  
  Revision  Changes    Path
  1.2       +8 -9      src/sys/i386/include/lock.h
  1.24      +15 -1     src/sys/i386/include/smptests.h
  1.49      +11 -20    src/sys/i386/i386/mp_machdep.c
  1.6       +88 -1     src/sys/i386/i386/simplelock.s

  Modified files:
    sys/i386/isa         sio.c 
  Log:
  Created a private simple_lock to control accesses to com data structs
  and hardware.
  There is now another simple_lock around clock data/hardware accesses in
  clock.c and microtime.s.  It is my belief that this is the only area
  sio/cy might stumble into during an unblocked INTerrupt.  Thus I separated
  the sio/cy code from the generic disable_intr()/enable_intr() routines.
  
  Controlled by smptests.h: USE_COMLOCK, ON by default.
  
  Revision  Changes    Path
  1.179     +76 -51    src/sys/i386/isa/sio.c