root / prex-0.9.0 / sys / include / irq.h @ 03e9c04a
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| 1 | 03e9c04a | Brad Neuman | /*-
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| 2 | * Copyright (c) 2005, Kohsuke Ohtani
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of the author nor the names of any co-contributors
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| 14 | * may be used to endorse or promote products derived from this software
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| 15 | * without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 27 | * SUCH DAMAGE.
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| 28 | */
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| 29 | |||
| 30 | #ifndef _IRQ_H
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| 31 | #define _IRQ_H
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| 32 | |||
| 33 | #include <types.h> |
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| 34 | #include <sys/cdefs.h> |
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| 35 | #include <sys/sysinfo.h> |
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| 36 | #include <sys/ipl.h> |
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| 37 | #include <event.h> |
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| 38 | |||
| 39 | struct irq {
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| 40 | int vector; /* vector number */ |
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| 41 | int (*isr)(void *); /* pointer to isr */ |
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| 42 | void (*ist)(void *); /* pointer to ist */ |
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| 43 | void *data; /* data to be passed for isr/ist */ |
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| 44 | int priority; /* interrupt priority */ |
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| 45 | u_int count; /* interrupt count */
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| 46 | int istreq; /* number of ist request */ |
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| 47 | thread_t thread; /* thread id of ist */
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| 48 | struct event istevt; /* event for ist */ |
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| 49 | }; |
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| 50 | |||
| 51 | /*
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| 52 | * Return values from ISR.
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| 53 | */
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| 54 | #define INT_DONE 0 /* success */ |
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| 55 | #define INT_ERROR 1 /* interrupt not handled */ |
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| 56 | #define INT_CONTINUE 2 /* continue processing (Request IST) */ |
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| 57 | |||
| 58 | /*
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| 59 | * Macro to map an interrupt priority level to IST priority.
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| 60 | */
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| 61 | #define ISTPRI(pri) (PRI_IST + (IPL_HIGH - pri))
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| 62 | |||
| 63 | /* No IST for irq_attach() */
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| 64 | #define IST_NONE ((void (*)(void *)) -1) |
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| 65 | |||
| 66 | __BEGIN_DECLS |
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| 67 | irq_t irq_attach(int, int, int, int (*)(void *), void (*)(void *), void *); |
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| 68 | void irq_detach(irq_t);
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| 69 | void irq_handler(int); |
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| 70 | int irq_info(struct irqinfo *); |
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| 71 | void irq_init(void); |
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| 72 | __BEGIN_DECLS |
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| 73 | |||
| 74 | #endif /* !_IRQ_H */ |