0384fff8c5
include: * Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The alpha port is still in transition and currently uses both.) * Per-CPU idle processes. * Interrupts are run in their own separate kernel threads and can be preempted (i386 only). Partially contributed by: BSDi (BSD/OS) Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
102 lines
3.5 KiB
C
102 lines
3.5 KiB
C
/*-
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* Copyright (c) 1997 Bruce Evans.
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <machine/ipl.h>
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#include <sys/proc.h>
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#include <i386/isa/icu.h>
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#include <i386/isa/intr_machdep.h>
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/*
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* Bits in the ipending bitmap variable must be set atomically because
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* ipending may be manipulated by interrupts or other cpu's without holding
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* any locks.
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*
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* Note: setbits uses a locked or, making simple cases MP safe.
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*/
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#define DO_SETBITS(name, var, bits) \
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void name(void) \
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{ \
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atomic_set_int(var, bits); \
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sched_ithd((void *) SOFTINTR); \
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}
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DO_SETBITS(setdelayed, &spending, loadandclear(&idelayed))
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DO_SETBITS(setsoftcamnet,&spending, SWI_CAMNET_PENDING)
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DO_SETBITS(setsoftcambio,&spending, SWI_CAMBIO_PENDING)
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DO_SETBITS(setsoftclock, &spending, SWI_CLOCK_PENDING)
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DO_SETBITS(setsoftnet, &spending, SWI_NET_PENDING)
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DO_SETBITS(setsofttty, &spending, SWI_TTY_PENDING)
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DO_SETBITS(setsoftvm, &spending, SWI_VM_PENDING)
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DO_SETBITS(setsofttq, &spending, SWI_TQ_PENDING)
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/*
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* We don't need to schedule soft interrupts any more, it happens
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* automatically.
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*/
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#define schedsoftcamnet
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#define schedsoftcambio
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#define schedsoftnet
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#define schedsofttty
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#define schedsoftvm
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#define schedsofttq
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unsigned
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softclockpending(void)
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{
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return (spending & SWI_CLOCK_PENDING);
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}
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/*
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* Dummy spl calls. The only reason for these is to not break
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* all the code which expects to call them.
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*/
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void spl0 (void) {}
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void splx (intrmask_t x) {}
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intrmask_t splq(intrmask_t mask) {return 0; }
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intrmask_t splbio(void) {return 0; }
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intrmask_t splcam(void) {return 0; }
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intrmask_t splclock(void) {return 0; }
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intrmask_t splhigh(void) {return 0; }
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intrmask_t splimp(void) {return 0; }
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intrmask_t splnet(void) {return 0; }
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intrmask_t splsoftcam(void) {return 0; }
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intrmask_t splsoftcambio(void) {return 0; }
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intrmask_t splsoftcamnet(void) {return 0; }
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intrmask_t splsoftclock(void) {return 0; }
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intrmask_t splsofttty(void) {return 0; }
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intrmask_t splsoftvm(void) {return 0; }
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intrmask_t splsofttq(void) {return 0; }
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intrmask_t splstatclock(void) {return 0; }
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intrmask_t spltty(void) {return 0; }
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intrmask_t splvm(void) {return 0; }
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