ipi.c revision 1.3.4.1
1 1.3.4.1 yamt /* $NetBSD: ipi.c,v 1.3.4.1 2008/05/16 02:23:02 yamt Exp $ */ 2 1.2 garbled /*- 3 1.2 garbled * Copyright (c) 2007 The NetBSD Foundation, Inc. 4 1.2 garbled * All rights reserved. 5 1.2 garbled * 6 1.2 garbled * This code is derived from software contributed to The NetBSD Foundation 7 1.2 garbled * by Tim Rightnour 8 1.2 garbled * 9 1.2 garbled * Redistribution and use in source and binary forms, with or without 10 1.2 garbled * modification, are permitted provided that the following conditions 11 1.2 garbled * are met: 12 1.2 garbled * 1. Redistributions of source code must retain the above copyright 13 1.2 garbled * notice, this list of conditions and the following disclaimer. 14 1.2 garbled * 2. Redistributions in binary form must reproduce the above copyright 15 1.2 garbled * notice, this list of conditions and the following disclaimer in the 16 1.2 garbled * documentation and/or other materials provided with the distribution. 17 1.2 garbled * 18 1.2 garbled * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 1.2 garbled * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 1.2 garbled * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 1.2 garbled * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 1.2 garbled * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 1.2 garbled * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 1.2 garbled * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 1.2 garbled * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 1.2 garbled * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 1.2 garbled * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 1.2 garbled * POSSIBILITY OF SUCH DAMAGE. 29 1.2 garbled */ 30 1.2 garbled 31 1.2 garbled #include <sys/cdefs.h> 32 1.3.4.1 yamt __KERNEL_RCSID(0, "$NetBSD: ipi.c,v 1.3.4.1 2008/05/16 02:23:02 yamt Exp $"); 33 1.2 garbled 34 1.2 garbled #include "opt_multiprocessor.h" 35 1.2 garbled #include "opt_pic.h" 36 1.2 garbled #include "opt_interrupt.h" 37 1.2 garbled #include "opt_altivec.h" 38 1.2 garbled 39 1.2 garbled #include <sys/param.h> 40 1.2 garbled #include <sys/malloc.h> 41 1.2 garbled #include <sys/kernel.h> 42 1.2 garbled 43 1.2 garbled #include <powerpc/atomic.h> 44 1.2 garbled #include <powerpc/fpu.h> 45 1.2 garbled #include <powerpc/altivec.h> 46 1.2 garbled 47 1.2 garbled #include <arch/powerpc/pic/picvar.h> 48 1.2 garbled #include <arch/powerpc/pic/ipivar.h> 49 1.2 garbled #include "opt_ipi.h" 50 1.2 garbled 51 1.2 garbled #ifdef MULTIPROCESSOR 52 1.2 garbled 53 1.2 garbled struct ipi_ops ipiops; 54 1.2 garbled volatile u_long IPI[CPU_MAXNUM]; 55 1.2 garbled 56 1.2 garbled /* Process an actual IPI */ 57 1.2 garbled 58 1.2 garbled int 59 1.2 garbled ppcipi_intr(void *v) 60 1.2 garbled { 61 1.3 garbled int cpu_id = curcpu()->ci_index; 62 1.2 garbled int msr; 63 1.2 garbled u_long ipi; 64 1.2 garbled 65 1.2 garbled curcpu()->ci_ev_ipi.ev_count++; 66 1.2 garbled ipi = atomic_loadlatch_ulong(&IPI[cpu_id], 0); 67 1.2 garbled 68 1.2 garbled if (ipi == PPC_IPI_NOMESG) 69 1.2 garbled return 1; 70 1.2 garbled 71 1.2 garbled if (ipi & PPC_IPI_FLUSH_FPU) 72 1.2 garbled save_fpu_cpu(); 73 1.2 garbled 74 1.2 garbled #ifdef ALTIVEC 75 1.2 garbled if (ipi & PPC_IPI_FLUSH_VEC) 76 1.2 garbled save_vec_cpu(); 77 1.2 garbled #endif 78 1.2 garbled 79 1.2 garbled if (ipi & PPC_IPI_HALT) { 80 1.2 garbled aprint_normal("halting CPU %d\n", cpu_id); 81 1.2 garbled msr = (mfmsr() & ~PSL_EE) | PSL_POW; 82 1.2 garbled for (;;) { 83 1.2 garbled __asm volatile ("sync; isync"); 84 1.2 garbled mtmsr(msr); 85 1.2 garbled } 86 1.2 garbled } 87 1.2 garbled return 1; 88 1.2 garbled } 89 1.2 garbled 90 1.2 garbled #endif /*MULTIPROCESSOR*/ 91
Indexes created Sat Oct 25 16:10:12 GMT 2025