The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/intr_machdep.h

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    1 /*-
    2  * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: src/sys/i386/include/intr_machdep.h,v 1.5.2.1 2005/03/25 21:08:49 jhb Exp $
   27  */
   28 
   29 #ifndef __MACHINE_INTR_MACHDEP_H__
   30 #define __MACHINE_INTR_MACHDEP_H__
   31 
   32 #ifdef _KERNEL
   33 
   34 /* With I/O APIC's we can have up to 191 interrupts. */
   35 #define NUM_IO_INTS     191
   36 #define INTRCNT_COUNT   (1 + NUM_IO_INTS * 2)
   37 
   38 #ifndef LOCORE
   39 
   40 typedef void inthand_t(u_int cs, u_int ef, u_int esp, u_int ss);
   41 
   42 #define IDTVEC(name)    __CONCAT(X,name)
   43 
   44 struct intsrc;
   45 
   46 /*
   47  * Methods that a PIC provides to mask/unmask a given interrupt source,
   48  * "turn on" the interrupt on the CPU side by setting up an IDT entry, and
   49  * return the vector associated with this source.
   50  */
   51 struct pic {
   52         void (*pic_enable_source)(struct intsrc *);
   53         void (*pic_disable_source)(struct intsrc *, int);
   54         void (*pic_eoi_source)(struct intsrc *);
   55         void (*pic_enable_intr)(struct intsrc *);
   56         int (*pic_vector)(struct intsrc *);
   57         int (*pic_source_pending)(struct intsrc *);
   58         void (*pic_suspend)(struct intsrc *);
   59         void (*pic_resume)(struct intsrc *);
   60         int (*pic_config_intr)(struct intsrc *, enum intr_trigger,
   61             enum intr_polarity);
   62 };
   63 
   64 /* Flags for pic_disable_source() */
   65 enum {
   66         PIC_EOI,
   67         PIC_NO_EOI,
   68 };
   69 
   70 /*
   71  * An interrupt source.  The upper-layer code uses the PIC methods to
   72  * control a given source.  The lower-layer PIC drivers can store additional
   73  * private data in a given interrupt source such as an interrupt pin number
   74  * or an I/O APIC pointer.
   75  */
   76 struct intsrc {
   77         struct pic *is_pic;
   78         struct ithd *is_ithread;
   79         u_long *is_count;
   80         u_long *is_straycount;
   81         u_int is_index;
   82 };
   83 
   84 struct intrframe;
   85 
   86 extern struct mtx icu_lock;
   87 extern int elcr_found;
   88 
   89 /* XXX: The elcr_* prototypes probably belong somewhere else. */
   90 int     elcr_probe(void);
   91 enum intr_trigger elcr_read_trigger(u_int irq);
   92 void    elcr_resume(void);
   93 void    elcr_write_trigger(u_int irq, enum intr_trigger trigger);
   94 int     intr_add_handler(const char *name, int vector, driver_intr_t handler,
   95     void *arg, enum intr_type flags, void **cookiep);
   96 int     intr_config_intr(int vector, enum intr_trigger trig,
   97     enum intr_polarity pol);
   98 void    intr_execute_handlers(struct intsrc *isrc, struct intrframe *iframe);
   99 struct intsrc *intr_lookup_source(int vector);
  100 int     intr_register_source(struct intsrc *isrc);
  101 int     intr_remove_handler(void *cookie);
  102 void    intr_resume(void);
  103 void    intr_suspend(void);
  104 
  105 #endif  /* !LOCORE */
  106 #endif  /* _KERNEL */
  107 #endif  /* !__MACHINE_INTR_MACHDEP_H__ */

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