diff options
author | marcel <marcel@FreeBSD.org> | 2004-07-10 18:08:38 +0000 |
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committer | marcel <marcel@FreeBSD.org> | 2004-07-10 18:08:38 +0000 |
commit | 81854db17fe676886a8e9286634d35026ba9c7aa (patch) | |
tree | 31992b91c30290f1bf700699f5241bc0d5e9cf08 /sys/dev/uart/uart_dbg.c | |
parent | b611b998685291da28525a21bf6f49ef69d909cb (diff) | |
download | FreeBSD-src-81854db17fe676886a8e9286634d35026ba9c7aa.zip FreeBSD-src-81854db17fe676886a8e9286634d35026ba9c7aa.tar.gz |
Add support for uart(4) being a debug port for the GDB backend.
Diffstat (limited to 'sys/dev/uart/uart_dbg.c')
-rw-r--r-- | sys/dev/uart/uart_dbg.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/sys/dev/uart/uart_dbg.c b/sys/dev/uart/uart_dbg.c new file mode 100644 index 0000000..71938b9 --- /dev/null +++ b/sys/dev/uart/uart_dbg.c @@ -0,0 +1,101 @@ +/* + * Copyright (c) 2004 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <machine/bus.h> + +#include <gdb/gdb.h> + +#include <dev/uart/uart.h> +#include <dev/uart/uart_cpu.h> + +static gdb_probe_f uart_dbg_probe; +static gdb_init_f uart_dbg_init; +static gdb_term_f uart_dbg_term; +static gdb_getc_f uart_dbg_getc; +static gdb_checkc_f uart_dbg_checkc; +static gdb_putc_f uart_dbg_putc; + +GDB_DBGPORT(uart, uart_dbg_probe, uart_dbg_init, uart_dbg_term, + uart_dbg_checkc, uart_dbg_getc, uart_dbg_putc); + +static struct uart_devinfo uart_dbgport; + +static int +uart_dbg_probe(void) +{ + + if (uart_cpu_getdev(UART_DEV_DBGPORT, &uart_dbgport)) + return (-1); + + if (uart_probe(&uart_dbgport)) + return (-1); + + return (0); +} + +static void +uart_dbg_init(void) +{ + + uart_dbgport.type = UART_DEV_DBGPORT; + uart_add_sysdev(&uart_dbgport); + uart_init(&uart_dbgport); +} + +static void +uart_dbg_term(void) +{ + + uart_term(&uart_dbgport); +} + +static void +uart_dbg_putc(int c) +{ + + uart_putc(&uart_dbgport, c); +} + +static int +uart_dbg_checkc(void) +{ + + return (uart_poll(&uart_dbgport)); +} + +static int +uart_dbg_getc(void) +{ + + return (uart_getc(&uart_dbgport)); +} |