diff options
Diffstat (limited to 'sys/dev/bvm/bvm_dbg.c')
-rw-r--r-- | sys/dev/bvm/bvm_dbg.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/sys/dev/bvm/bvm_dbg.c b/sys/dev/bvm/bvm_dbg.c new file mode 100644 index 0000000..1ba7ce0 --- /dev/null +++ b/sys/dev/bvm/bvm_dbg.c @@ -0,0 +1,100 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * 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 NETAPP, INC ``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 NETAPP, INC OR CONTRIBUTORS 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. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/bus.h> + +#include <gdb/gdb.h> + +#include <machine/cpufunc.h> + +static gdb_probe_f bvm_dbg_probe; +static gdb_init_f bvm_dbg_init; +static gdb_term_f bvm_dbg_term; +static gdb_getc_f bvm_dbg_getc; +static gdb_putc_f bvm_dbg_putc; + +GDB_DBGPORT(bvm, bvm_dbg_probe, bvm_dbg_init, bvm_dbg_term, + bvm_dbg_getc, bvm_dbg_putc); + +#define BVM_DBG_PORT 0x224 +static int bvm_dbg_port = BVM_DBG_PORT; + +#define BVM_DBG_SIG ('B' << 8 | 'V') + +static int +bvm_dbg_probe(void) +{ + int disabled, port; + + disabled = 0; + resource_int_value("bvmdbg", 0, "disabled", &disabled); + + if (!disabled) { + if (resource_int_value("bvmdbg", 0, "port", &port) == 0) + bvm_dbg_port = port; + + if (inw(bvm_dbg_port) == BVM_DBG_SIG) { + /* + * Return a higher priority than 0 to override other + * gdb dbgport providers that may be present (e.g. uart) + */ + return (1); + } + } + + return (-1); +} + +static void +bvm_dbg_init(void) +{ +} + +static void +bvm_dbg_term(void) +{ +} + +static void +bvm_dbg_putc(int c) +{ + + outl(bvm_dbg_port, c); +} + +static int +bvm_dbg_getc(void) +{ + + return (inl(bvm_dbg_port)); +} |