0,0 → 1,152 |
/****************************************************************************** |
* |
* Module Name: tbfind - find table |
* |
*****************************************************************************/ |
|
/* |
* Copyright (C) 2000 - 2015, 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; |
struct acpi_table_header header; |
u32 i; |
|
ACPI_FUNCTION_TRACE(tb_find_table); |
|
/* Validate the input table signature */ |
|
if (!acpi_is_valid_signature(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 */ |
|
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)) { |
return_ACPI_STATUS(status); |
} |
|
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)); |
return_ACPI_STATUS(AE_OK); |
} |
} |
|
return_ACPI_STATUS(AE_NOT_FOUND); |
} |