xref: /dragonfly/sys/dev/acpica/Osd/OsdTable.c (revision a4da4a90)
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  * $FreeBSD: src/sys/dev/acpica/Osd/OsdTable.c,v 1.7 2004/04/20 17:13:08 njl Exp $
27  */
28 
29 /*
30  * Environmental and ACPI Tables (partial)
31  */
32 
33 #include "acpi.h"
34 
35 #include <sys/kernel.h>
36 #include <sys/linker.h>
37 
38 #undef _COMPONENT
39 #define _COMPONENT      ACPI_TABLES
40 
41 static char acpi_osname[128];
42 TUNABLE_STR("hw.acpi.osname", acpi_osname, sizeof(acpi_osname));
43 
44 ACPI_STATUS
45 AcpiOsPredefinedOverride (
46     const ACPI_PREDEFINED_NAMES *InitVal,
47     ACPI_STRING		 *NewVal)
48 {
49     if (InitVal == NULL || NewVal == NULL)
50 	return (AE_BAD_PARAMETER);
51 
52     *NewVal = NULL;
53     if (ACPI_COMPARE_NAMESEG(InitVal->Name, "_OS_") &&
54 	InitVal->Type == ACPI_TYPE_STRING && strlen(acpi_osname) > 0) {
55 	kprintf("ACPI: Overriding _OS definition with \"%s\"\n", acpi_osname);
56 	*NewVal = acpi_osname;
57     }
58 
59     return (AE_OK);
60 }
61 
62 ACPI_STATUS
63 AcpiOsTableOverride (
64     ACPI_TABLE_HEADER       *ExistingTable,
65     ACPI_TABLE_HEADER       **NewTable)
66 {
67     caddr_t		    acpi_dsdt, p;
68 
69     if (ExistingTable == NULL || NewTable == NULL)
70 	return(AE_BAD_PARAMETER);
71 
72     *NewTable = NULL;
73     if (ACPI_COMPARE_NAMESEG(ExistingTable->Signature, ACPI_SIG_DSDT) == 0)
74 	return(AE_SUPPORT);
75     if ((acpi_dsdt = preload_search_by_type("acpi_dsdt")) == NULL)
76 	return(AE_NOT_FOUND);
77     if ((p = preload_search_info(acpi_dsdt, MODINFO_ADDR)) == NULL)
78 	return(AE_ERROR);
79     *NewTable = *(void **)p;
80 
81     return (AE_OK);
82 }
83 
84 ACPI_STATUS
85 AcpiOsPhysicalTableOverride(
86     ACPI_TABLE_HEADER		*ExistingTable,
87     ACPI_PHYSICAL_ADDRESS	*NewAddress,
88     UINT32			*NewTableLength)
89 {
90 	return (AE_SUPPORT);
91 }
92