OsdTable.c revision 281075 
1/*-
2 * Copyright (c) 2002 Mitsaru Iwasaki
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 AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * ACPI Table interfaces
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: stable/10/sys/dev/acpica/Osd/OsdTable.c 281075 2015-04-04 10:17:51Z dim $");
33
34#include <sys/param.h>
35#include <sys/endian.h>
36#include <sys/kernel.h>
37#include <sys/linker.h>
38
39#include <contrib/dev/acpica/include/acpi.h>
40#include <contrib/dev/acpica/include/actables.h>
41
42#undef _COMPONENT
43#define	_COMPONENT      ACPI_TABLES
44
45static char acpi_osname[128];
46TUNABLE_STR("hw.acpi.osname", acpi_osname, sizeof(acpi_osname));
47
48ACPI_STATUS
49AcpiOsPredefinedOverride(const ACPI_PREDEFINED_NAMES *InitVal,
50    ACPI_STRING *NewVal)
51{
52
53	if (InitVal == NULL || NewVal == NULL)
54		return (AE_BAD_PARAMETER);
55
56	*NewVal = NULL;
57	if (ACPI_COMPARE_NAME(InitVal->Name, "_OS_") &&
58	    InitVal->Type == ACPI_TYPE_STRING && strlen(acpi_osname) > 0) {
59		printf("ACPI: Overriding _OS definition with \"%s\"\n",
60		    acpi_osname);
61		*NewVal = acpi_osname;
62	}
63	return (AE_OK);
64}
65
66ACPI_STATUS
67AcpiOsTableOverride(ACPI_TABLE_HEADER *ExistingTable,
68    ACPI_TABLE_HEADER **NewTable)
69{
70	char modname[] = "acpi_dsdt";
71	caddr_t acpi_table;
72	ACPI_TABLE_HEADER *hdr;
73	size_t sz;
74
75	if (ExistingTable == NULL || NewTable == NULL)
76		return (AE_BAD_PARAMETER);
77
78	*NewTable = NULL;
79	if (!ACPI_COMPARE_NAME(ExistingTable->Signature, ACPI_SIG_DSDT))
80#ifdef notyet
81		for (int i = 0; i < ACPI_NAME_SIZE; i++)
82			modname[i + 5] = tolower(ExistingTable->Signature[i]);
83#else
84		return (AE_SUPPORT);
85#endif
86	acpi_table = preload_search_by_type(modname);
87	if (acpi_table == NULL)
88		return (AE_NOT_FOUND);
89	hdr = preload_fetch_addr(acpi_table);
90	sz = preload_fetch_size(acpi_table);
91	if (hdr == NULL || sz == 0)
92		return (AE_ERROR);
93#ifndef notyet
94	/* Assume SSDT is installed with DSDT. */
95	AcpiGbl_DisableSsdtTableInstall = TRUE;
96#endif
97	*NewTable = hdr;
98	return (AE_OK);
99}
100
101ACPI_STATUS
102AcpiOsPhysicalTableOverride(ACPI_TABLE_HEADER *ExistingTable,
103    ACPI_PHYSICAL_ADDRESS *NewAddress, UINT32 *NewTableLength)
104{
105
106	return (AE_SUPPORT);
107}
108