OsdEnvironment.c revision 167814 
1/*-
2 * Copyright (c) 2000,2001 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: head/sys/amd64/acpica/OsdEnvironment.c 167814 2007-03-22 18:16:43Z jkim $");
30
31/*
32 * 6.1 : Environmental support
33 */
34#include <sys/types.h>
35#include <sys/bus.h>
36#include <sys/linker_set.h>
37#include <sys/sysctl.h>
38
39#include <contrib/dev/acpica/acpi.h>
40#include <contrib/dev/acpica/actables.h>
41
42static u_long amd64_acpi_root;
43
44SYSCTL_ULONG(_machdep, OID_AUTO, acpi_root, CTLFLAG_RD, &amd64_acpi_root, 0,
45	     "The physical address of the RSDP");
46
47ACPI_STATUS
48AcpiOsInitialize(void)
49{
50	return(0);
51}
52
53ACPI_STATUS
54AcpiOsTerminate(void)
55{
56	return(0);
57}
58
59ACPI_PHYSICAL_ADDRESS
60AcpiOsGetRootPointer(void)
61{
62	u_long	ptr;
63
64	if (amd64_acpi_root == 0 &&
65	    (resource_long_value("acpi", 0, "rsdp", (long *)&ptr) == 0 ||
66	    AcpiFindRootPointer((ACPI_NATIVE_UINT *)&ptr) == AE_OK) &&
67	    ptr != 0)
68		amd64_acpi_root = ptr;
69
70	return (amd64_acpi_root);
71}
72