1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/******************************************************************************
*
* Module Name: tbfind - find table
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2017, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#include "actables.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME("tbfind")
/*******************************************************************************
*
* FUNCTION: acpi_tb_find_table
*
* PARAMETERS: signature - String with ACPI table signature
* oem_id - String with the table OEM ID
* oem_table_id - String with the OEM Table ID
* table_index - Where the table index is returned
*
* RETURN: Status and table index
*
* DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the
* Signature, OEM ID and OEM Table ID. Returns an index that can
* be used to get the table header or entire table.
*
******************************************************************************/
acpi_status
acpi_tb_find_table(char *signature,
char *oem_id, char *oem_table_id, u32 *table_index)
{
acpi_status status = AE_OK;
struct acpi_table_header header;
u32 i;
ACPI_FUNCTION_TRACE(tb_find_table);
/* Validate the input table signature */
if (!acpi_ut_valid_nameseg(signature)) {
return_ACPI_STATUS(AE_BAD_SIGNATURE);
}
/* Don't allow the OEM strings to be too long */
if ((strlen(oem_id) > ACPI_OEM_ID_SIZE) ||
(strlen(oem_table_id) > ACPI_OEM_TABLE_ID_SIZE)) {
return_ACPI_STATUS(AE_AML_STRING_LIMIT);
}
/* Normalize the input strings */
memset(&header, 0, sizeof(struct acpi_table_header));
ACPI_MOVE_NAME(header.signature, signature);
strncpy(header.oem_id, oem_id, ACPI_OEM_ID_SIZE);
strncpy(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE);
/* Search for the table */
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
if (memcmp(&(acpi_gbl_root_table_list.tables[i].signature),
header.signature, ACPI_NAME_SIZE)) {
/* Not the requested table */
continue;
}
/* Table with matching signature has been found */
if (!acpi_gbl_root_table_list.tables[i].pointer) {
/* Table is not currently mapped, map it */
status =
acpi_tb_validate_table(&acpi_gbl_root_table_list.
tables[i]);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
if (!acpi_gbl_root_table_list.tables[i].pointer) {
continue;
}
}
/* Check for table match on all IDs */
if (!memcmp
(acpi_gbl_root_table_list.tables[i].pointer->signature,
header.signature, ACPI_NAME_SIZE) && (!oem_id[0]
||
!memcmp
(acpi_gbl_root_table_list.
tables[i].pointer->
oem_id,
header.oem_id,
ACPI_OEM_ID_SIZE))
&& (!oem_table_id[0]
|| !memcmp(acpi_gbl_root_table_list.tables[i].pointer->
oem_table_id, header.oem_table_id,
ACPI_OEM_TABLE_ID_SIZE))) {
*table_index = i;
ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
"Found table [%4.4s]\n",
header.signature));
goto unlock_and_exit;
}
}
status = AE_NOT_FOUND;
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
return_ACPI_STATUS(status);
}
|
