uart_dbg.c revision 139749 
1/*-
2 * Copyright (c) 2004 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/dev/uart/uart_dbg.c 139749 2005-01-06 01:43:34Z imp $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/bus.h>
33#include <sys/kernel.h>
34#include <machine/bus.h>
35
36#include <gdb/gdb.h>
37
38#include <dev/uart/uart.h>
39#include <dev/uart/uart_cpu.h>
40
41static gdb_probe_f uart_dbg_probe;
42static gdb_init_f uart_dbg_init;
43static gdb_term_f uart_dbg_term;
44static gdb_getc_f uart_dbg_getc;
45static gdb_checkc_f uart_dbg_checkc;
46static gdb_putc_f uart_dbg_putc;
47
48GDB_DBGPORT(uart, uart_dbg_probe, uart_dbg_init, uart_dbg_term,
49    uart_dbg_checkc, uart_dbg_getc, uart_dbg_putc);
50
51static struct uart_devinfo uart_dbgport;
52
53static int
54uart_dbg_probe(void)
55{
56
57	if (uart_cpu_getdev(UART_DEV_DBGPORT, &uart_dbgport))
58		return (-1);
59
60	if (uart_probe(&uart_dbgport))
61		return (-1);
62
63	return (0);
64}
65
66static void
67uart_dbg_init(void)
68{
69
70	uart_dbgport.type = UART_DEV_DBGPORT;
71	uart_add_sysdev(&uart_dbgport);
72	uart_init(&uart_dbgport);
73}
74
75static void
76uart_dbg_term(void)
77{
78
79	uart_term(&uart_dbgport);
80}
81
82static void
83uart_dbg_putc(int c)
84{
85
86	uart_putc(&uart_dbgport, c);
87}
88
89static int
90uart_dbg_checkc(void)
91{
92
93	return (uart_poll(&uart_dbgport));
94}
95
96static int
97uart_dbg_getc(void)
98{
99
100	return (uart_getc(&uart_dbgport));
101}
102