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scoutos / prex-0.9.0 / sys / include / irq.h @ 03e9c04a

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/*-
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 * Copyright (c) 2005, Kohsuke Ohtani
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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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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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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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#ifndef _IRQ_H
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#define _IRQ_H
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#include <types.h>
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#include <sys/cdefs.h>
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#include <sys/sysinfo.h>
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#include <sys/ipl.h>
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#include <event.h>
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struct irq {
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        int                vector;                /* vector number */
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        int                (*isr)(void *);        /* pointer to isr */
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        void                (*ist)(void *);        /* pointer to ist */
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        void                *data;                /* data to be passed for isr/ist */
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        int                priority;        /* interrupt priority */
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        u_int                count;                /* interrupt count */
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        int                istreq;                /* number of ist request */
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        thread_t        thread;                /* thread id of ist */
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        struct event        istevt;                /* event for ist */
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};
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/*
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 * Return values from ISR.
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 */
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#define INT_DONE        0        /* success */
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#define INT_ERROR        1        /* interrupt not handled */
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#define INT_CONTINUE        2        /* continue processing (Request IST) */
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/*
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 * Macro to map an interrupt priority level to IST priority.
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 */
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#define ISTPRI(pri)        (PRI_IST + (IPL_HIGH - pri))
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/* No IST for irq_attach() */
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#define IST_NONE        ((void (*)(void *)) -1)
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__BEGIN_DECLS
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irq_t         irq_attach(int, int, int, int (*)(void *), void (*)(void *), void *);
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void         irq_detach(irq_t);
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void         irq_handler(int);
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int         irq_info(struct irqinfo *);
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void         irq_init(void);
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__BEGIN_DECLS
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#endif /* !_IRQ_H */