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: releng/6.0/sys/i386/include/intr_machdep.h 140451 2005-01-18 20:24:47Z 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 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 void intrcnt_add(const char *name, u_long **countp);
105
106 #endif /* !LOCORE */
107 #endif /* _KERNEL */
108 #endif /* !__MACHINE_INTR_MACHDEP_H__ */
Cache object: 6fda8ba62a43f717977fbd805bb8ec97
|