freebsd-dev/sys/dev/bvm/bvm_dbg.c
Pedro F. Giffuni 718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

103 lines
2.5 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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));
}