8088699f79
type of software interrupt. Roughly, what used to be a bit in spending now maps to a swi thread. Each thread can have multiple handlers, just like a hardware interrupt thread. - Instead of using a bitmask of pending interrupts, we schedule the specific software interrupt thread to run, so spending, NSWI, and the shandlers array are no longer needed. We can now have an arbitrary number of software interrupt threads. When you register a software interrupt thread via sinthand_add(), you get back a struct intrhand that you pass to sched_swi() when you wish to schedule your swi thread to run. - Convert the name of 'struct intrec' to 'struct intrhand' as it is a bit more intuitive. Also, prefix all the members of struct intrhand with 'ih_'. - Make swi_net() a MI function since there is now no point in it being MD. Submitted by: cp
66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
/*
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* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
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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 unmodified, this list of conditions, and the following
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* 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_INTERRUPT_H_
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#define _SYS_INTERRUPT_H_
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/*
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* Describe a hardware interrupt handler.
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*
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* Multiple interrupt handlers for a specific vector can be chained
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* together via the 'next' pointer.
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*/
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struct intrhand {
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driver_intr_t *ih_handler; /* code address of handler */
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void *ih_argument; /* argument to pass to handler */
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enum intr_type ih_flags; /* flag bits (sys/bus.h) */
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char *ih_name; /* name of handler */
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struct ithd *ih_ithd; /* handler we're connected to */
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struct intrhand *ih_next; /* next handler for this irq */
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int ih_need; /* need interrupt */
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};
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int ithread_priority __P((int flags));
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void sched_swi __P((struct intrhand *, int));
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#define SWI_SWITCH 0x1
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#define SWI_NOSWITCH 0x2
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#define SWI_DELAY 0x4 /* implies NOSWITCH */
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struct intrhand * sinthand_add __P((const char *name, struct ithd **,
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driver_intr_t, void *arg, int pri, int flags));
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extern struct ithd *tty_ithd;
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extern struct ithd *clk_ithd;
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extern struct intrhand *net_ih;
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extern struct intrhand *softclock_ih;
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extern struct intrhand *vm_ih;
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#endif
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