118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
/* $NetBSD: ipi_openpic.c,v 1.7 2012/02/01 09:54:03 matt 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_openpic.c,v 1.7 2012/02/01 09:54:03 matt Exp $");
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#include "opt_multiprocessor.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/atomic.h>
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#include <sys/cpu.h>
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#include <uvm/uvm_extern.h>
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#include <machine/pio.h>
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#include <powerpc/openpic.h>
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#include <powerpc/pic/picvar.h>
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#include <powerpc/pic/ipivar.h>
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#ifdef MULTIPROCESSOR
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extern struct ipi_ops ipiops;
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static void openpic_send_ipi(cpuid_t, uint32_t);
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static void openpic_establish_ipi(int, int, void *);
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void
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setup_openpic_ipi(void)
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{
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uint32_t x;
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ipiops.ppc_send_ipi = openpic_send_ipi;
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ipiops.ppc_establish_ipi = openpic_establish_ipi;
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ipiops.ppc_ipi_vector = IPI_VECTOR;
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/* Some (broken) openpic's byteswap on read, but not write. */
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openpic_write(OPENPIC_IPI_VECTOR(0), OPENPIC_IMASK);
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x = openpic_read(OPENPIC_IPI_VECTOR(0));
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if (x != OPENPIC_IMASK)
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x = bswap32(openpic_read(OPENPIC_IPI_VECTOR(1)));
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else
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x = openpic_read(OPENPIC_IPI_VECTOR(1));
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x &= ~(OPENPIC_IMASK | OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK);
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x |= (15 << OPENPIC_PRIORITY_SHIFT) | ipiops.ppc_ipi_vector;
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openpic_write(OPENPIC_IPI_VECTOR(1), x);
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}
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static void
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openpic_send_ipi(cpuid_t target, uint32_t mesg)
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{
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struct cpu_info * const ci = curcpu();
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uint32_t cpumask = 0;
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switch (target) {
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case IPI_DST_ALL:
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case IPI_DST_NOTME:
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for (u_int i = 0; i < ncpu; i++) {
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struct cpu_info * const dst_ci = cpu_lookup(i);
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if (target == IPI_DST_ALL || dst_ci != ci) {
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cpumask |= 1 << cpu_index(dst_ci);
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atomic_or_32(&dst_ci->ci_pending_ipis,
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mesg);
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}
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}
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break;
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default: {
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struct cpu_info * const dst_ci = cpu_lookup(target);
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cpumask = 1 << cpu_index(dst_ci);
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atomic_or_32(&dst_ci->ci_pending_ipis, mesg);
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break;
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}
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}
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openpic_write(OPENPIC_IPI(cpu_index(ci), 1), cpumask);
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}
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static void
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openpic_establish_ipi(int type, int level, void *ih_args)
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{
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/*
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* XXX
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* for now we catch IPIs early in pic_handle_intr() so no need to do anything
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* here
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*/
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#if 0
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intr_establish(ipiops.ppc_ipi_vector, type, level, ppcipi_intr,
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ih_args);
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#endif
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}
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#endif /*MULTIPROCESSOR*/
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