1/*-
2 * Copyright (c) 2014 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Semihalf under
6 * the sponsorship of the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31
32#ifndef _MACHINE_DEBUG_MONITOR_H_
33#define	_MACHINE_DEBUG_MONITOR_H_
34
35#define	DBG_BRP_MAX	16
36#define	DBG_WRP_MAX	16
37
38struct debug_monitor_state {
39	uint32_t	dbg_enable_count;
40	uint32_t	dbg_flags;
41#define	DBGMON_ENABLED		(1 << 0)
42#define	DBGMON_KERNEL		(1 << 1)
43	uint64_t	dbg_bcr[DBG_BRP_MAX];
44	uint64_t	dbg_bvr[DBG_BRP_MAX];
45	uint64_t	dbg_wcr[DBG_WRP_MAX];
46	uint64_t	dbg_wvr[DBG_WRP_MAX];
47};
48
49#ifdef _KERNEL
50
51enum dbg_access_t {
52	HW_BREAKPOINT_X		= 0,
53	HW_BREAKPOINT_R		= 1,
54	HW_BREAKPOINT_W		= 2,
55	HW_BREAKPOINT_RW	= HW_BREAKPOINT_R | HW_BREAKPOINT_W,
56};
57
58void dbg_monitor_init(void);
59void dbg_register_sync(struct debug_monitor_state *);
60int dbg_setup_watchpoint(struct debug_monitor_state *, vm_offset_t, vm_size_t,
61    enum dbg_access_t);
62int dbg_remove_watchpoint(struct debug_monitor_state *, vm_offset_t, vm_size_t);
63
64#ifdef DDB
65void dbg_show_watchpoint(void);
66#endif
67
68#endif /* _KERNEL */
69
70#endif /* _MACHINE_DEBUG_MONITOR_H_ */
71