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 * $FreeBSD$ 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 *); 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 */ 68 struct 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 76 struct intrframe; 77 78 extern struct mtx icu_lock; 79 80 int intr_add_handler(const char *name, int vector, driver_intr_t handler, 81 void *arg, enum intr_type flags, void **cookiep); 82 void intr_execute_handlers(struct intsrc *isrc, struct intrframe *iframe); 83 struct intsrc *intr_lookup_source(int vector); 84 int intr_register_source(struct intsrc *isrc); 85 int intr_remove_handler(void *cookie); 86 void intr_resume(void); 87 void intr_suspend(void); 88 89 #endif /* !LOCORE */ 90 #endif /* _KERNEL */ 91 #endif /* !__MACHINE_INTR_MACHDEP_H__ */ 92