1/*-
2 * Copyright (C) 2015 Nathan Whitehorn
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * $FreeBSD$
26 */
27
28#include <dev/ofw/openfirm.h>
29
30#include "opal.h"
31
32extern uint64_t opal_entrypoint;
33extern uint64_t opal_data;
34extern uint64_t opal_msr;
35
36static int opal_initialized = 0;
37
38int
39opal_check(void)
40{
41	phandle_t opal;
42	cell_t val[2];
43
44	if (opal_initialized)
45		return (0);
46
47	opal = OF_finddevice("/ibm,opal");
48	if (opal == -1)
49		return (ENOENT);
50
51	if (!OF_hasprop(opal, "opal-base-address") ||
52	    !OF_hasprop(opal, "opal-entry-address"))
53		return (ENOENT);
54
55	OF_getencprop(opal, "opal-base-address", val, sizeof(val));
56	opal_data = ((uint64_t)val[0] << 32) | val[1];
57	OF_getencprop(opal, "opal-entry-address", val, sizeof(val));
58	opal_entrypoint = ((uint64_t)val[0] << 32) | val[1];
59
60	opal_msr = mfmsr() & ~(PSL_EE | PSL_IR | PSL_DR | PSL_SE);
61
62	opal_initialized = 1;
63
64	return (0);
65}
66
67