1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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/param.h>
30 #include <sys/systm.h>
31 #include <sys/bus.h>
32 #include <sys/kernel.h>
33 #include <machine/bus.h>
34
35 #include <gdb/gdb.h>
36
37 #include <dev/uart/uart.h>
38 #include <dev/uart/uart_cpu.h>
39
40 static gdb_probe_f uart_dbg_probe;
41 static gdb_init_f uart_dbg_init;
42 static gdb_term_f uart_dbg_term;
43 static gdb_getc_f uart_dbg_getc;
44 static gdb_putc_f uart_dbg_putc;
45
46 GDB_DBGPORT(uart, uart_dbg_probe, uart_dbg_init, uart_dbg_term,
47 uart_dbg_getc, uart_dbg_putc);
48
49 static struct uart_devinfo uart_dbgport;
50
51 static int
uart_dbg_probe(void)52 uart_dbg_probe(void)
53 {
54
55 if (uart_cpu_getdev(UART_DEV_DBGPORT, &uart_dbgport))
56 return (-1);
57
58 if (uart_probe(&uart_dbgport))
59 return (-1);
60
61 return (0);
62 }
63
64 static void
uart_dbg_init(void)65 uart_dbg_init(void)
66 {
67
68 uart_dbgport.type = UART_DEV_DBGPORT;
69 uart_add_sysdev(&uart_dbgport);
70 uart_init(&uart_dbgport);
71 }
72
73 static void
uart_dbg_term(void)74 uart_dbg_term(void)
75 {
76
77 uart_term(&uart_dbgport);
78 }
79
80 static void
uart_dbg_putc(int c)81 uart_dbg_putc(int c)
82 {
83
84 uart_putc(&uart_dbgport, c);
85 }
86
87 static int
uart_dbg_getc(void)88 uart_dbg_getc(void)
89 {
90
91 return (uart_poll(&uart_dbgport));
92 }
93