1 /* $NetBSD: ipi_openpic.c,v 1.6 2011/06/20 06:21:45 matt Exp $ */ 2 /*- 3 * Copyright (c) 2007 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Tim Rightnour 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: ipi_openpic.c,v 1.6 2011/06/20 06:21:45 matt Exp $"); 33 34 #include "opt_multiprocessor.h" 35 #include <sys/param.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 #include <sys/atomic.h> 39 #include <sys/cpu.h> 40 41 #include <uvm/uvm_extern.h> 42 43 #include <machine/pio.h> 44 #include <powerpc/openpic.h> 45 46 #include <powerpc/pic/picvar.h> 47 #include <powerpc/pic/ipivar.h> 48 49 #ifdef MULTIPROCESSOR 50 51 extern struct ipi_ops ipiops; 52 static void openpic_send_ipi(cpuid_t, uint32_t); 53 static void openpic_establish_ipi(int, int, void *); 54 55 void 56 setup_openpic_ipi(void) 57 { 58 uint32_t x; 59 60 ipiops.ppc_send_ipi = openpic_send_ipi; 61 ipiops.ppc_establish_ipi = openpic_establish_ipi; 62 ipiops.ppc_ipi_vector = IPI_VECTOR; 63 64 /* Some (broken) openpic's byteswap on read, but not write. */ 65 openpic_write(OPENPIC_IPI_VECTOR(0), OPENPIC_IMASK); 66 x = openpic_read(OPENPIC_IPI_VECTOR(0)); 67 if (x != OPENPIC_IMASK) 68 x = bswap32(openpic_read(OPENPIC_IPI_VECTOR(1))); 69 else 70 x = openpic_read(OPENPIC_IPI_VECTOR(1)); 71 x &= ~(OPENPIC_IMASK | OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK); 72 x |= (15 << OPENPIC_PRIORITY_SHIFT) | ipiops.ppc_ipi_vector; 73 openpic_write(OPENPIC_IPI_VECTOR(1), x); 74 } 75 76 static void 77 openpic_send_ipi(cpuid_t target, uint32_t mesg) 78 { 79 struct cpu_info * const ci = curcpu(); 80 uint32_t cpumask = 0; 81 82 switch (target) { 83 case IPI_DST_ALL: 84 case IPI_DST_NOTME: 85 for (u_int i = 0; i < ncpu; i++) { 86 struct cpu_info * const dst_ci = cpu_lookup(i); 87 if (target == IPI_DST_ALL || dst_ci != ci) { 88 cpumask |= 1 << cpu_index(dst_ci); 89 atomic_or_32(&dst_ci->ci_pending_ipis, 90 mesg); 91 } 92 } 93 break; 94 default: { 95 struct cpu_info * const dst_ci = cpu_lookup(target); 96 cpumask = 1 << cpu_index(dst_ci); 97 atomic_or_32(&dst_ci->ci_pending_ipis, mesg); 98 break; 99 } 100 } 101 openpic_write(OPENPIC_IPI(cpu_index(ci), 1), cpumask); 102 } 103 104 static void 105 openpic_establish_ipi(int type, int level, void *ih_args) 106 { 107 /* 108 * XXX 109 * for now we catch IPIs early in pic_handle_intr() so no need to do anything 110 * here 111 */ 112 #if 0 113 intr_establish(ipiops.ppc_ipi_vector, type, level, ppcipi_intr, 114 ih_args); 115 #endif 116 } 117 118 #endif /*MULTIPROCESSOR*/ 119