1/*-
 2 * SPDX-License-Identifier: BSD-2-Clause
 3 *
 4 * Copyright (c) 2020 The FreeBSD Foundation
 5 *
 6 * This software was developed by Mitchell Horne under sponsorship from
 7 * the FreeBSD Foundation.
 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
31#ifndef _MACHINE_GDB_MACHDEP_H_
32#define	_MACHINE_GDB_MACHDEP_H_
33
34#define	GDB_BUFSZ	4096
35#define	GDB_NREGS	68
36#define	GDB_REG_X0	0
37#define	GDB_REG_X19	19
38#define	GDB_REG_X29	29
39#define	GDB_REG_LR	30
40#define	GDB_REG_SP	31
41#define	GDB_REG_PC	32
42#define	GDB_REG_CSPR	33
43#define	GDB_REG_V0	34
44#define	GDB_REG_V31	65
45#define	GDB_REG_FPSR	66
46#define	GDB_REG_FPCR	67
47_Static_assert(GDB_BUFSZ >= (GDB_NREGS * 16), "buffer fits 'g' regs");
48
49static __inline size_t
50gdb_cpu_regsz(int regnum)
51{
52	if (regnum == GDB_REG_CSPR || regnum == GDB_REG_FPSR ||
53	    regnum == GDB_REG_FPCR)
54		return (4);
55	else if (regnum >= GDB_REG_V0 && regnum <= GDB_REG_V31)
56		return (16);
57
58	return (8);
59}
60
61static __inline int
62gdb_cpu_query(void)
63{
64	return (0);
65}
66
67static __inline void *
68gdb_begin_write(void)
69{
70	return (NULL);
71}
72
73static __inline void
74gdb_end_write(void *arg __unused)
75{
76}
77
78void *gdb_cpu_getreg(int, size_t *);
79void gdb_cpu_setreg(int, void *);
80int gdb_cpu_signal(int, int);
81void gdb_cpu_stop_reason(int, int);
82
83#endif /* !_MACHINE_GDB_MACHDEP_H_ */