1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2004 Marcel Moolenaar
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
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 ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/bus.h>
35#include <sys/kernel.h>
36#include <machine/bus.h>
37
38#include <gdb/gdb.h>
39
40#include <dev/uart/uart.h>
41#include <dev/uart/uart_cpu.h>
42
43static gdb_probe_f uart_dbg_probe;
44static gdb_init_f uart_dbg_init;
45static gdb_term_f uart_dbg_term;
46static gdb_getc_f uart_dbg_getc;
47static gdb_putc_f uart_dbg_putc;
48
49GDB_DBGPORT(uart, uart_dbg_probe, uart_dbg_init, uart_dbg_term,
50    uart_dbg_getc, uart_dbg_putc);
51
52static struct uart_devinfo uart_dbgport;
53
54static int
55uart_dbg_probe(void)
56{
57
58	if (uart_cpu_getdev(UART_DEV_DBGPORT, &uart_dbgport))
59		return (-1);
60
61	if (uart_probe(&uart_dbgport))
62		return (-1);
63
64	return (0);
65}
66
67static void
68uart_dbg_init(void)
69{
70
71	uart_dbgport.type = UART_DEV_DBGPORT;
72	uart_add_sysdev(&uart_dbgport);
73	uart_init(&uart_dbgport);
74}
75
76static void
77uart_dbg_term(void)
78{
79
80	uart_term(&uart_dbgport);
81}
82
83static void
84uart_dbg_putc(int c)
85{
86
87	uart_putc(&uart_dbgport, c);
88}
89
90static int
91uart_dbg_getc(void)
92{
93
94	return (uart_poll(&uart_dbgport));
95}
96