1/*
2 * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29#include <sys/cdefs.h>
30
31typedef enum {
32 KDP_EVENT_ENTER,
33 KDP_EVENT_EXIT,
34 KDP_EVENT_PANICLOG
35} kdp_event_t;
36
37__BEGIN_DECLS
38typedef void (*kdp_callout_fn_t)(void *arg, kdp_event_t event);
39
40/*
41 * Register fn(arg, event) to be called at kdp entry/exit.
42 * The callouts are made in a single-threaded environment, interrupts are
43 * disabled and processors other than the callout processor quiesced.
44 * N.B. callouts are strictly limited in what they can do: they must execute
45 * with interrupts disabled and they can't call back into the kernel for any
46 * non-trivial service.
47 */
48extern void kdp_register_callout(kdp_callout_fn_t fn, void *arg);
49
50__END_DECLS
51