From 0cb6724bc7cf3a2148c1610ce3fe8e7a7590b6ca Mon Sep 17 00:00:00 2001 From: fvdl Date: Sat, 1 Mar 2003 22:55:02 +0000 Subject: [PATCH] lock_machdep.c moved here from arch/i386/i386. --- sys/arch/x86/conf/files.x86 | 9 +- sys/arch/x86/x86/lock_machdep.c | 143 ++++++++++++++++++++++++++++++++ 2 files changed, 148 insertions(+), 4 deletions(-) create mode 100644 sys/arch/x86/x86/lock_machdep.c diff --git a/sys/arch/x86/conf/files.x86 b/sys/arch/x86/conf/files.x86 index f35b062f9e28..3cf97c0e8585 100644 --- a/sys/arch/x86/conf/files.x86 +++ b/sys/arch/x86/conf/files.x86 @@ -1,7 +1,7 @@ -# $NetBSD: files.x86,v 1.3 2003/02/27 01:50:40 fvdl Exp $ +# $NetBSD: files.x86,v 1.4 2003/03/01 22:55:02 fvdl Exp $ # options for MP configuration through the MP spec -defflag opt_mpbios.h MPBIOS MPVERBOSE MPDEBUGA +defflag opt_mpbios.h MPBIOS MPVERBOSE MPDEBUG # MTRR support defflag MTRR @@ -9,13 +9,14 @@ defflag MTRR define mainbus { [apid = -1] } file arch/x86/x86/apic.c ioapic | lapic +file arch/x86/x86/bus_machdep.c file arch/x86/x86/consinit.c file arch/x86/x86/i8259.c file arch/x86/x86/intr.c -file arch/x86/x86/softintr.c -file arch/x86/x86/bus_machdep.c file arch/x86/x86/ipi.c multiprocessor +file arch/x86/x86/lock_machdep.c lockdebug file arch/x86/x86/mtrr_i686.c mtrr +file arch/x86/x86/softintr.c define lapic file arch/x86/x86/lapic.c lapic needs-flag diff --git a/sys/arch/x86/x86/lock_machdep.c b/sys/arch/x86/x86/lock_machdep.c new file mode 100644 index 000000000000..1c233d91db98 --- /dev/null +++ b/sys/arch/x86/x86/lock_machdep.c @@ -0,0 +1,143 @@ +/* $NetBSD: lock_machdep.c,v 1.1 2003/03/01 22:55:02 fvdl Exp $ */ + +/*- + * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, + * NASA Ames Research Center. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include /* RCS ID & Copyright macro defns */ + +/* + * Machine-dependent spin lock operations. + */ + +#include "opt_ddb.h" + +#include +#include +#include + +#include +#include + +#include + +void +__cpu_simple_lock_init(lockp) + __cpu_simple_lock_t *lockp; +{ + + *lockp = __SIMPLELOCK_UNLOCKED; +} + +#if defined (DEBUG) && defined(DDB) +int spin_limit = 10000000; +__cpu_simple_lock_t *wantlock[X86_MAXPROCS], *gotlock[X86_MAXPROCS]; +#endif + +void +__cpu_simple_lock(lockp) + __cpu_simple_lock_t *lockp; +{ +#if defined (DEBUG) +#if defined(DDB) + int spincount = 0; + int cpu = cpu_number(); + int limit = spin_limit * (cpu + 1); +#endif + __cpu_simple_lock_t v = *lockp; + + KDASSERT((v == __SIMPLELOCK_LOCKED) || (v == __SIMPLELOCK_UNLOCKED)); +#if defined(DDB) + wantlock[cpu] = lockp; +#endif +#endif + + while (x86_atomic_testset_i(lockp, __SIMPLELOCK_LOCKED) == + __SIMPLELOCK_LOCKED) { +#if defined(DEBUG) && defined(DDB) + spincount++; + if (spincount == limit) { + extern int db_active; + spincount = 0; + + if (db_active) { + db_printf("cpu%d: spinout while in debugger\n", + cpu); + while (db_active) + ; + } + db_printf("cpu%d: spinout\n", cpu); + Debugger(); + } +#endif + } +#if defined(DEBUG) && defined(DDB) + wantlock[cpu] = 0; + gotlock[cpu] = lockp; +#endif + __lockbarrier(); +} + +int +__cpu_simple_lock_try(lockp) + __cpu_simple_lock_t *lockp; +{ + int r; +#ifdef DEBUG + __cpu_simple_lock_t v = *lockp; + + KDASSERT((v == __SIMPLELOCK_LOCKED) || (v == __SIMPLELOCK_UNLOCKED)); +#endif + r = (x86_atomic_testset_i(lockp, __SIMPLELOCK_LOCKED) + == __SIMPLELOCK_UNLOCKED); + + __lockbarrier(); + + return (r); +} + +void +__cpu_simple_unlock(lockp) + __cpu_simple_lock_t *lockp; +{ +#ifdef DEBUG + __cpu_simple_lock_t v = *lockp; + + KDASSERT((v == __SIMPLELOCK_LOCKED) || (v == __SIMPLELOCK_UNLOCKED)); +#endif + __lockbarrier(); + *lockp = __SIMPLELOCK_UNLOCKED; +}