intr_machdep.h revision 121982
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: head/sys/i386/include/intr_machdep.h 121982 2003-11-03 21:25:52Z jhb $ 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 159 interrupts. */ 35#define NUM_IO_INTS 159 36#define INTRCNT_COUNT (1 + NUM_IO_INTS * 2) 37 38#ifndef LOCORE 39 40typedef void inthand_t(u_int cs, u_int ef, u_int esp, u_int ss); 41 42#define IDTVEC(name) __CONCAT(X,name) 43 44struct 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 */ 51struct pic { 52 void (*pic_enable_source)(struct intsrc *); 53 void (*pic_disable_source)(struct intsrc *); 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}; 61 62/* 63 * An interrupt source. The upper-layer code uses the PIC methods to 64 * control a given source. The lower-layer PIC drivers can store additional 65 * private data in a given interrupt source such as an interrupt pin number 66 * or an I/O APIC pointer. 67 */ 68struct intsrc { 69 struct pic *is_pic; 70 struct ithd *is_ithread; 71 u_long *is_count; 72 u_long *is_straycount; 73 u_int is_index; 74}; 75 76struct intrframe; 77 78extern struct mtx icu_lock; 79 80int intr_add_handler(const char *name, int vector, driver_intr_t handler, 81 void *arg, enum intr_type flags, void **cookiep); 82void intr_execute_handlers(struct intsrc *isrc, struct intrframe *iframe); 83struct intsrc *intr_lookup_source(int vector); 84int intr_register_source(struct intsrc *isrc); 85int intr_remove_handler(void *cookie); 86void intr_resume(void); 87void intr_suspend(void); 88 89#endif /* !LOCORE */ 90#endif /* _KERNEL */ 91#endif /* !__MACHINE_INTR_MACHDEP_H__ */ 92