1/*-
2 * Copyright (c) 2017 Andrew Turner
3 * All rights reserved.
4 *
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $FreeBSD$
31 */
32
33#ifndef _MACHINE__UNDEFINED_H_
34#define	_MACHINE__UNDEFINED_H_
35
36#ifdef _KERNEL
37
38typedef int (*undef_handler_t)(vm_offset_t, uint32_t, struct trapframe *,
39    uint32_t);
40
41static inline int
42mrs_Op0(uint32_t insn)
43{
44
45	/* op0 is encoded without the top bit in a mrs instruction */
46	return (2 | ((insn & MRS_Op0_MASK) >> MRS_Op0_SHIFT));
47}
48
49#define	MRS_GET(op)						\
50static inline int						\
51mrs_##op(uint32_t insn)						\
52{								\
53								\
54	return ((insn & MRS_##op##_MASK) >> MRS_##op##_SHIFT);	\
55}
56MRS_GET(Op1)
57MRS_GET(CRn)
58MRS_GET(CRm)
59MRS_GET(Op2)
60
61void undef_init(void);
62void *install_undef_handler(bool, undef_handler_t);
63void remove_undef_handler(void *);
64int undef_insn(u_int, struct trapframe *);
65
66#endif /* _KERNEL */
67
68#endif
69