91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/* $NetBSD: ipi.c,v 1.4 2008/04/28 20:23:32 martin Exp $ */
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/*-
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* Copyright (c) 2007 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Tim Rightnour
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ipi.c,v 1.4 2008/04/28 20:23:32 martin Exp $");
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#include "opt_multiprocessor.h"
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#include "opt_pic.h"
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#include "opt_interrupt.h"
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#include "opt_altivec.h"
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#include <sys/param.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <powerpc/atomic.h>
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#include <powerpc/fpu.h>
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#include <powerpc/altivec.h>
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#include <arch/powerpc/pic/picvar.h>
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#include <arch/powerpc/pic/ipivar.h>
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#include "opt_ipi.h"
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#ifdef MULTIPROCESSOR
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struct ipi_ops ipiops;
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volatile u_long IPI[CPU_MAXNUM];
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/* Process an actual IPI */
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int
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ppcipi_intr(void *v)
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{
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int cpu_id = curcpu()->ci_index;
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int msr;
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u_long ipi;
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curcpu()->ci_ev_ipi.ev_count++;
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ipi = atomic_loadlatch_ulong(&IPI[cpu_id], 0);
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if (ipi == PPC_IPI_NOMESG)
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return 1;
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if (ipi & PPC_IPI_FLUSH_FPU)
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save_fpu_cpu();
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#ifdef ALTIVEC
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if (ipi & PPC_IPI_FLUSH_VEC)
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save_vec_cpu();
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#endif
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if (ipi & PPC_IPI_HALT) {
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aprint_normal("halting CPU %d\n", cpu_id);
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msr = (mfmsr() & ~PSL_EE) | PSL_POW;
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for (;;) {
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__asm volatile ("sync; isync");
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mtmsr(msr);
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}
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}
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return 1;
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}
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#endif /*MULTIPROCESSOR*/
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