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/*-
* 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);
gone_in(13, "bvmdebug");
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));
}
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