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 int (*pic_config_intr)(struct intsrc *, enum intr_trigger, 61 enum intr_polarity); 62 }; 63 64 /* 65 * An interrupt source. The upper-layer code uses the PIC methods to 66 * control a given source. The lower-layer PIC drivers can store additional 67 * private data in a given interrupt source such as an interrupt pin number 68 * or an I/O APIC pointer. 69 */ 70 struct intsrc { 71 struct pic *is_pic; 72 struct ithd *is_ithread; 73 u_long *is_count; 74 u_long *is_straycount; 75 u_int is_index; 76 }; 77 78 struct intrframe; 79 80 extern struct mtx icu_lock; 81 82 /* XXX: The elcr_* prototypes probably belong somewhere else. */ 83 int elcr_probe(void); 84 enum intr_trigger elcr_read_trigger(u_int irq); 85 void elcr_resume(void); 86 void elcr_write_trigger(u_int irq, enum intr_trigger trigger); 87 int intr_add_handler(const char *name, int vector, driver_intr_t handler, 88 void *arg, enum intr_type flags, void **cookiep); 89 int intr_config_intr(int vector, enum intr_trigger trig, 90 enum intr_polarity pol); 91 void intr_execute_handlers(struct intsrc *isrc, struct intrframe *iframe); 92 struct intsrc *intr_lookup_source(int vector); 93 int intr_register_source(struct intsrc *isrc); 94 int intr_remove_handler(void *cookie); 95 void intr_resume(void); 96 void intr_suspend(void); 97 98 #endif /* !LOCORE */ 99 #endif /* _KERNEL */ 100 #endif /* !__MACHINE_INTR_MACHDEP_H__ */ 101