Add basic interprocessor interrupt sending and receiving code. Current
IPI functions: HALT, IMB, TBIA, TBIAP. XXX HALT is not yet implemented, it's just a stub.
This commit is contained in:
thorpej
parent
78d445810b
commit
2c50ec242f
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@ -1,4 +1,4 @@
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/* $NetBSD: interrupt.c,v 1.29 1998/09/24 23:28:17 thorpej Exp $ */
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/* $NetBSD: interrupt.c,v 1.30 1998/09/26 00:03:51 thorpej Exp $ */
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/*
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* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
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@ -37,7 +37,7 @@
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: interrupt.c,v 1.29 1998/09/24 23:28:17 thorpej Exp $");
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__KERNEL_RCSID(0, "$NetBSD: interrupt.c,v 1.30 1998/09/26 00:03:51 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -56,6 +56,11 @@ __KERNEL_RCSID(0, "$NetBSD: interrupt.c,v 1.29 1998/09/24 23:28:17 thorpej Exp $
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#include <machine/frame.h>
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#include <machine/cpuconf.h>
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#if defined(MULTIPROCESSOR)
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#include <sys/device.h>
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#include <alpha/alpha/cpuvar.h>
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#endif
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#ifdef EVCNT_COUNTERS
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#include <sys/device.h>
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struct evcnt clock_intr_evcnt; /* event counter for clock intrs. */
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@ -72,13 +77,34 @@ interrupt(a0, a1, a2, framep)
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switch (a0) {
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case ALPHA_INTR_XPROC: /* interprocessor interrupt */
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#if defined(MULTIPROCESSOR)
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{
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struct cpu_softc *sc;
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u_long cpu_id = alpha_pal_whami();
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u_long pending_ipis, bit;
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sc = cpus[cpu_id];
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#ifdef DIAGNOSTIC
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if (sc == NULL) {
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/* XXX panic? */
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printf("WARNING: no cpu_softc for ID %lu\n",
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cpu_id);
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return;
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}
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#endif
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pending_ipis = alpha_atomic_loadlatch_q(&sc->sc_ipis, 0);
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for (bit = 0; bit < ALPHA_NIPIS; bit++)
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if (pending_ipis & (1UL << bit))
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(*ipifuncs[bit])();
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/*
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* Handle inter-console messages if we're the primary
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* CPU.
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*/
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if (alpha_pal_whami() == hwrpb->rpb_primary_cpu_id &&
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if (cpu_id == hwrpb->rpb_primary_cpu_id &&
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hwrpb->rpb_txrdy != 0)
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cpu_iccb_receive();
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}
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#else
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printf("WARNING: received interprocessor interrupt!\n");
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#endif /* MULTIPROCESSOR */
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@ -0,0 +1,120 @@
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/* $NetBSD: ipifuncs.c,v 1.1 1998/09/26 00:03:52 thorpej Exp $ */
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/*-
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* Copyright (c) 1998 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 Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: ipifuncs.c,v 1.1 1998/09/26 00:03:52 thorpej Exp $");
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/*
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* Interprocessor interrupt handlers.
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*/
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <machine/alpha_cpu.h>
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#include <machine/cpu.h>
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#include <machine/intr.h>
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#include <machine/rpb.h>
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#include <alpha/alpha/cpuvar.h>
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void alpha_ipi_halt __P((void));
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void alpha_ipi_imb __P((void));
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void alpha_ipi_tbia __P((void));
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void alpha_ipi_tbiap __P((void));
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ipifunc_t ipifuncs[ALPHA_NIPIS] = {
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alpha_ipi_halt,
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alpha_ipi_imb,
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alpha_ipi_tbia,
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alpha_ipi_tbiap,
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};
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/*
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* Send an interprocessor interrupt.
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*/
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void
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alpha_send_ipi(cpu_id, ipinum)
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u_long cpu_id, ipinum;
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{
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struct cpu_softc *sc;
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u_long ipimask;
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#ifdef DIAGNOSTIC
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if (ipinum >= ALPHA_NIPIS)
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panic("alpha_sched_ipi: bogus ipinum");
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if (cpu_id >= hwrpb->rpb_pcs_cnt || (sc = cpus[cpu_id]) == NULL)
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panic("alpha_sched_ipi: bogus cpu_id");
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#endif
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ipimask = (1UL << ipinum);
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alpha_atomic_setbits_q(&sc->sc_ipis, ipimask);
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alpha_pal_wripir(cpu_id);
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}
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void
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alpha_ipi_halt()
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{
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/* XXX Implement me! */
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}
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void
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alpha_ipi_imb()
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{
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alpha_pal_imb();
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}
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void
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alpha_ipi_tbia()
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{
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ALPHA_TBIA();
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}
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void
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alpha_ipi_tbiap()
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{
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ALPHA_TBIAP();
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}
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@ -1,4 +1,4 @@
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# $NetBSD: files.alpha,v 1.91 1998/09/24 22:32:36 thorpej Exp $
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# $NetBSD: files.alpha,v 1.92 1998/09/26 00:03:52 thorpej Exp $
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#
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# alpha-specific configuration info
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@ -387,6 +387,7 @@ file arch/alpha/alpha/clock.c
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file arch/alpha/alpha/conf.c
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file arch/alpha/alpha/cpuconf.c
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file arch/alpha/alpha/interrupt.c
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file arch/alpha/alpha/ipifuncs.c multiprocessor
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file arch/alpha/alpha/lock_machdep.c multiprocessor
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file arch/alpha/alpha/machdep.c
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file arch/alpha/alpha/mainbus.c
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@ -1,4 +1,4 @@
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/* $NetBSD: intr.h,v 1.17 1998/09/25 22:06:33 thorpej Exp $ */
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/* $NetBSD: intr.h,v 1.18 1998/09/26 00:03:52 thorpej Exp $ */
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/*
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* Copyright (c) 1997 Christopher G. Demetriou. All rights reserved.
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@ -90,6 +90,20 @@ extern u_int64_t ssir;
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#define setsoftclock() ssir |= SIR_CLOCK
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#define setsoftserial() ssir |= SIR_SERIAL
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/*
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* Interprocessor interrupts.
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*/
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#define ALPHA_IPI_HALT 0UL /* halt processor */
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#define ALPHA_IPI_IMB 1UL /* perform an I-stream barrier */
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#define ALPHA_IPI_TBIA 2UL /* TBI all TB entries */
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#define ALPHA_IPI_TBIAP 3UL /* TBI all per-process TB entries */
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#define ALPHA_NIPIS 4UL /* must not exceed 64 */
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typedef void (*ipifunc_t) __P((void));
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extern ipifunc_t ipifuncs[ALPHA_NIPIS];
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void alpha_send_ipi __P((unsigned long, unsigned long));
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/*
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* Alpha shared-interrupt-line common code.
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*/
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