/* $NetBSD: ipi.c,v 1.4 2008/04/28 20:23:32 martin Exp $ */ /*- * Copyright (c) 2007 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Tim Rightnour * * 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. * * 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 <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: ipi.c,v 1.4 2008/04/28 20:23:32 martin Exp $"); #include "opt_multiprocessor.h" #include "opt_pic.h" #include "opt_interrupt.h" #include "opt_altivec.h" #include <sys/param.h> #include <sys/malloc.h> #include <sys/kernel.h> #include <powerpc/atomic.h> #include <powerpc/fpu.h> #include <powerpc/altivec.h> #include <arch/powerpc/pic/picvar.h> #include <arch/powerpc/pic/ipivar.h> #include "opt_ipi.h" #ifdef MULTIPROCESSOR struct ipi_ops ipiops; volatile u_long IPI[CPU_MAXNUM]; /* Process an actual IPI */ int ppcipi_intr(void *v) { int cpu_id = curcpu()->ci_index; int msr; u_long ipi; curcpu()->ci_ev_ipi.ev_count++; ipi = atomic_loadlatch_ulong(&IPI[cpu_id], 0); if (ipi == PPC_IPI_NOMESG) return 1; if (ipi & PPC_IPI_FLUSH_FPU) save_fpu_cpu(); #ifdef ALTIVEC if (ipi & PPC_IPI_FLUSH_VEC) save_vec_cpu(); #endif if (ipi & PPC_IPI_HALT) { aprint_normal("halting CPU %d\n", cpu_id); msr = (mfmsr() & ~PSL_EE) | PSL_POW; for (;;) { __asm volatile ("sync; isync"); mtmsr(msr); } } return 1; } #endif /*MULTIPROCESSOR*/