/* $NetBSD: ipi_hammerhead.c,v 1.3 2008/04/28 20:23:27 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_hammerhead.c,v 1.3 2008/04/28 20:23:27 martin Exp $"); #include "opt_multiprocessor.h" #include <sys/param.h> #include <sys/malloc.h> #include <sys/kernel.h> #include <uvm/uvm_extern.h> #include <machine/pio.h> #include <powerpc/atomic.h> #include <arch/powerpc/pic/picvar.h> #include <arch/powerpc/pic/ipivar.h> #ifdef MULTIPROCESSOR extern struct ipi_ops ipiops; extern volatile u_long IPI[CPU_MAXNUM]; static void hh_send_ipi(int, u_long); static void hh_establish_ipi(int, int, void *); #define HH_INTR_SECONDARY 0xf80000c0 #define HH_INTR_PRIMARY 0xf3019000 #define GC_IPI_IRQ 30 void setup_hammerhead_ipi(void) { ipiops.ppc_send_ipi = hh_send_ipi; ipiops.ppc_establish_ipi = hh_establish_ipi; ipiops.ppc_ipi_vector = GC_IPI_IRQ; } static void hh_send_ipi(int target, u_long mesg) { int cpu_id = target; if (target == IPI_T_ALL) { atomic_setbits_ulong(&IPI[0], mesg); atomic_setbits_ulong(&IPI[1], mesg); in32(HH_INTR_PRIMARY); out32(HH_INTR_SECONDARY, ~0); out32(HH_INTR_SECONDARY, 0); return; } if (target == IPI_T_NOTME) { switch (cpu_number()) { case 0: cpu_id = 1; break; case 1: cpu_id = 0; } } atomic_setbits_ulong(&IPI[cpu_id], mesg); switch (cpu_id) { case 0: in32(HH_INTR_PRIMARY); break; case 1: out32(HH_INTR_SECONDARY, ~0); out32(HH_INTR_SECONDARY, 0); break; } } static void hh_establish_ipi(int type, int level, void *ih_args) { intr_establish(ipiops.ppc_ipi_vector, type, level, ppcipi_intr, ih_args); } #endif /*MULTIPROCESSOR*/