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/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 43 static gdb_probe_f uart_dbg_probe; 44 static gdb_init_f uart_dbg_init; 45 static gdb_term_f uart_dbg_term; 46 static gdb_getc_f uart_dbg_getc; 47 static gdb_putc_f uart_dbg_putc; 48 49 GDB_DBGPORT(uart, uart_dbg_probe, uart_dbg_init, uart_dbg_term, 50 uart_dbg_getc, uart_dbg_putc); 51 52 static struct uart_devinfo uart_dbgport; 53 54 static int 55 uart_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 67 static void 68 uart_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 76 static void 77 uart_dbg_term(void) 78 { 79 80 uart_term(&uart_dbgport); 81 } 82 83 static void 84 uart_dbg_putc(int c) 85 { 86 87 uart_putc(&uart_dbgport, c); 88 } 89 90 static int 91 uart_dbg_getc(void) 92 { 93 94 return (uart_poll(&uart_dbgport)); 95 } 96