101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
/*-
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <gdb/gdb.h>
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#include <machine/cpufunc.h>
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static gdb_probe_f bvm_dbg_probe;
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static gdb_init_f bvm_dbg_init;
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static gdb_term_f bvm_dbg_term;
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static gdb_getc_f bvm_dbg_getc;
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static gdb_putc_f bvm_dbg_putc;
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GDB_DBGPORT(bvm, bvm_dbg_probe, bvm_dbg_init, bvm_dbg_term,
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bvm_dbg_getc, bvm_dbg_putc);
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#define BVM_DBG_PORT 0x224
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static int bvm_dbg_port = BVM_DBG_PORT;
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#define BVM_DBG_SIG ('B' << 8 | 'V')
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static int
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bvm_dbg_probe(void)
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{
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int disabled, port;
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disabled = 0;
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resource_int_value("bvmdbg", 0, "disabled", &disabled);
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if (!disabled) {
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if (resource_int_value("bvmdbg", 0, "port", &port) == 0)
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bvm_dbg_port = port;
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if (inw(bvm_dbg_port) == BVM_DBG_SIG) {
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/*
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* Return a higher priority than 0 to override other
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* gdb dbgport providers that may be present (e.g. uart)
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*/
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return (1);
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}
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}
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return (-1);
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}
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static void
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bvm_dbg_init(void)
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{
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}
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static void
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bvm_dbg_term(void)
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{
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}
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static void
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bvm_dbg_putc(int c)
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{
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outl(bvm_dbg_port, c);
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}
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static int
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bvm_dbg_getc(void)
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{
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return (inl(bvm_dbg_port));
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}
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