736 lines
21 KiB
C
736 lines
21 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: tbxface - Public interfaces to the ACPI subsystem
|
|
* ACPI table oriented interfaces
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2008, 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 "acnamesp.h"
|
|
#include "actables.h"
|
|
|
|
#define _COMPONENT ACPI_TABLES
|
|
ACPI_MODULE_NAME("tbxface")
|
|
|
|
/* Local prototypes */
|
|
static acpi_status acpi_tb_load_namespace(void);
|
|
|
|
static int no_auto_ssdt;
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_allocate_root_table
|
|
*
|
|
* PARAMETERS: initial_table_count - Size of initial_table_array, in number of
|
|
* struct acpi_table_desc structures
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Allocate a root table array. Used by i_aSL compiler and
|
|
* acpi_initialize_tables.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_allocate_root_table(u32 initial_table_count)
|
|
{
|
|
|
|
acpi_gbl_root_table_list.size = initial_table_count;
|
|
acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE;
|
|
|
|
return (acpi_tb_resize_root_table_list());
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_initialize_tables
|
|
*
|
|
* PARAMETERS: initial_table_array - Pointer to an array of pre-allocated
|
|
* struct acpi_table_desc structures. If NULL, the
|
|
* array is dynamically allocated.
|
|
* initial_table_count - Size of initial_table_array, in number of
|
|
* struct acpi_table_desc structures
|
|
* allow_realloc - Flag to tell Table Manager if resize of
|
|
* pre-allocated array is allowed. Ignored
|
|
* if initial_table_array is NULL.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT.
|
|
*
|
|
* NOTE: Allows static allocation of the initial table array in order
|
|
* to avoid the use of dynamic memory in confined environments
|
|
* such as the kernel boot sequence where it may not be available.
|
|
*
|
|
* If the host OS memory managers are initialized, use NULL for
|
|
* initial_table_array, and the table will be dynamically allocated.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status __init
|
|
acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
|
|
u32 initial_table_count, u8 allow_resize)
|
|
{
|
|
acpi_physical_address rsdp_address;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_initialize_tables);
|
|
|
|
/*
|
|
* Set up the Root Table Array
|
|
* Allocate the table array if requested
|
|
*/
|
|
if (!initial_table_array) {
|
|
status = acpi_allocate_root_table(initial_table_count);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
} else {
|
|
/* Root Table Array has been statically allocated by the host */
|
|
|
|
ACPI_MEMSET(initial_table_array, 0,
|
|
(acpi_size) initial_table_count *
|
|
sizeof(struct acpi_table_desc));
|
|
|
|
acpi_gbl_root_table_list.tables = initial_table_array;
|
|
acpi_gbl_root_table_list.size = initial_table_count;
|
|
acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN;
|
|
if (allow_resize) {
|
|
acpi_gbl_root_table_list.flags |=
|
|
ACPI_ROOT_ALLOW_RESIZE;
|
|
}
|
|
}
|
|
|
|
/* Get the address of the RSDP */
|
|
|
|
rsdp_address = acpi_os_get_root_pointer();
|
|
if (!rsdp_address) {
|
|
return_ACPI_STATUS(AE_NOT_FOUND);
|
|
}
|
|
|
|
/*
|
|
* Get the root table (RSDT or XSDT) and extract all entries to the local
|
|
* Root Table Array. This array contains the information of the RSDT/XSDT
|
|
* in a common, more useable format.
|
|
*/
|
|
status =
|
|
acpi_tb_parse_root_table(rsdp_address, ACPI_TABLE_ORIGIN_MAPPED);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_reallocate_root_table
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the
|
|
* root list from the previously provided scratch area. Should
|
|
* be called once dynamic memory allocation is available in the
|
|
* kernel
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_reallocate_root_table(void)
|
|
{
|
|
struct acpi_table_desc *tables;
|
|
acpi_size new_size;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_reallocate_root_table);
|
|
|
|
/*
|
|
* Only reallocate the root table if the host provided a static buffer
|
|
* for the table array in the call to acpi_initialize_tables.
|
|
*/
|
|
if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
|
|
return_ACPI_STATUS(AE_SUPPORT);
|
|
}
|
|
|
|
new_size = ((acpi_size) acpi_gbl_root_table_list.count +
|
|
ACPI_ROOT_TABLE_SIZE_INCREMENT) *
|
|
sizeof(struct acpi_table_desc);
|
|
|
|
/* Create new array and copy the old array */
|
|
|
|
tables = ACPI_ALLOCATE_ZEROED(new_size);
|
|
if (!tables) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, new_size);
|
|
|
|
acpi_gbl_root_table_list.size = acpi_gbl_root_table_list.count;
|
|
acpi_gbl_root_table_list.tables = tables;
|
|
acpi_gbl_root_table_list.flags =
|
|
ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE;
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_load_table
|
|
*
|
|
* PARAMETERS: table_ptr - pointer to a buffer containing the entire
|
|
* table to be loaded
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to load a table from the caller's
|
|
* buffer. The buffer must contain an entire ACPI Table including
|
|
* a valid header. The header fields will be verified, and if it
|
|
* is determined that the table is invalid, the call will fail.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_load_table(struct acpi_table_header *table_ptr)
|
|
{
|
|
acpi_status status;
|
|
u32 table_index;
|
|
struct acpi_table_desc table_desc;
|
|
|
|
if (!table_ptr)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
|
|
table_desc.pointer = table_ptr;
|
|
table_desc.length = table_ptr->length;
|
|
table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN;
|
|
|
|
/*
|
|
* Install the new table into the local data structures
|
|
*/
|
|
status = acpi_tb_add_table(&table_desc, &table_index);
|
|
if (ACPI_FAILURE(status)) {
|
|
return status;
|
|
}
|
|
status = acpi_ns_load_table(table_index, acpi_gbl_root_node);
|
|
return status;
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_load_table)
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_get_table_header
|
|
*
|
|
* PARAMETERS: Signature - ACPI signature of needed table
|
|
* Instance - Which instance (for SSDTs)
|
|
* out_table_header - The pointer to the table header to fill
|
|
*
|
|
* RETURN: Status and pointer to mapped table header
|
|
*
|
|
* DESCRIPTION: Finds an ACPI table header.
|
|
*
|
|
* NOTE: Caller is responsible in unmapping the header with
|
|
* acpi_os_unmap_memory
|
|
*
|
|
*****************************************************************************/
|
|
acpi_status
|
|
acpi_get_table_header(char *signature,
|
|
u32 instance, struct acpi_table_header *out_table_header)
|
|
{
|
|
u32 i;
|
|
u32 j;
|
|
struct acpi_table_header *header;
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!signature || !out_table_header) {
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Walk the root table list
|
|
*/
|
|
for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
|
|
if (!ACPI_COMPARE_NAME
|
|
(&(acpi_gbl_root_table_list.tables[i].signature),
|
|
signature)) {
|
|
continue;
|
|
}
|
|
|
|
if (++j < instance) {
|
|
continue;
|
|
}
|
|
|
|
if (!acpi_gbl_root_table_list.tables[i].pointer) {
|
|
if ((acpi_gbl_root_table_list.tables[i].
|
|
flags & ACPI_TABLE_ORIGIN_MASK) ==
|
|
ACPI_TABLE_ORIGIN_MAPPED) {
|
|
header =
|
|
acpi_os_map_memory(acpi_gbl_root_table_list.
|
|
tables[i].address,
|
|
sizeof(struct
|
|
acpi_table_header));
|
|
if (!header) {
|
|
return AE_NO_MEMORY;
|
|
}
|
|
ACPI_MEMCPY(out_table_header, header,
|
|
sizeof(struct acpi_table_header));
|
|
acpi_os_unmap_memory(header,
|
|
sizeof(struct
|
|
acpi_table_header));
|
|
} else {
|
|
return AE_NOT_FOUND;
|
|
}
|
|
} else {
|
|
ACPI_MEMCPY(out_table_header,
|
|
acpi_gbl_root_table_list.tables[i].pointer,
|
|
sizeof(struct acpi_table_header));
|
|
}
|
|
return (AE_OK);
|
|
}
|
|
|
|
return (AE_NOT_FOUND);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_get_table_header)
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_unload_table_id
|
|
*
|
|
* PARAMETERS: id - Owner ID of the table to be removed.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This routine is used to force the unload of a table (by id)
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_unload_table_id(acpi_owner_id id)
|
|
{
|
|
int i;
|
|
acpi_status status = AE_NOT_EXIST;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_unload_table_id);
|
|
|
|
/* Find table in the global table list */
|
|
for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
|
|
if (id != acpi_gbl_root_table_list.tables[i].owner_id) {
|
|
continue;
|
|
}
|
|
/*
|
|
* Delete all namespace objects owned by this table. Note that these
|
|
* objects can appear anywhere in the namespace by virtue of the AML
|
|
* "Scope" operator. Thus, we need to track ownership by an ID, not
|
|
* simply a position within the hierarchy
|
|
*/
|
|
acpi_tb_delete_namespace_by_owner(i);
|
|
status = acpi_tb_release_owner_id(i);
|
|
acpi_tb_set_table_loaded_flag(i, FALSE);
|
|
break;
|
|
}
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_unload_table_id)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_get_table
|
|
*
|
|
* PARAMETERS: Signature - ACPI signature of needed table
|
|
* Instance - Which instance (for SSDTs)
|
|
* out_table - Where the pointer to the table is returned
|
|
*
|
|
* RETURN: Status and pointer to table
|
|
*
|
|
* DESCRIPTION: Finds and verifies an ACPI table.
|
|
*
|
|
*****************************************************************************/
|
|
acpi_status
|
|
acpi_get_table(char *signature,
|
|
u32 instance, struct acpi_table_header **out_table)
|
|
{
|
|
u32 i;
|
|
u32 j;
|
|
acpi_status status;
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!signature || !out_table) {
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Walk the root table list
|
|
*/
|
|
for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
|
|
if (!ACPI_COMPARE_NAME
|
|
(&(acpi_gbl_root_table_list.tables[i].signature),
|
|
signature)) {
|
|
continue;
|
|
}
|
|
|
|
if (++j < instance) {
|
|
continue;
|
|
}
|
|
|
|
status =
|
|
acpi_tb_verify_table(&acpi_gbl_root_table_list.tables[i]);
|
|
if (ACPI_SUCCESS(status)) {
|
|
*out_table = acpi_gbl_root_table_list.tables[i].pointer;
|
|
}
|
|
|
|
if (!acpi_gbl_permanent_mmap) {
|
|
acpi_gbl_root_table_list.tables[i].pointer = NULL;
|
|
}
|
|
|
|
return (status);
|
|
}
|
|
|
|
return (AE_NOT_FOUND);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_get_table)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_get_table_by_index
|
|
*
|
|
* PARAMETERS: table_index - Table index
|
|
* Table - Where the pointer to the table is returned
|
|
*
|
|
* RETURN: Status and pointer to the table
|
|
*
|
|
* DESCRIPTION: Obtain a table by an index into the global table list.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_get_table_by_index(u32 table_index, struct acpi_table_header **table)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_get_table_by_index);
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!table) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
|
|
/* Validate index */
|
|
|
|
if (table_index >= acpi_gbl_root_table_list.count) {
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
if (!acpi_gbl_root_table_list.tables[table_index].pointer) {
|
|
|
|
/* Table is not mapped, map it */
|
|
|
|
status =
|
|
acpi_tb_verify_table(&acpi_gbl_root_table_list.
|
|
tables[table_index]);
|
|
if (ACPI_FAILURE(status)) {
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
}
|
|
|
|
*table = acpi_gbl_root_table_list.tables[table_index].pointer;
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_get_table_by_index)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_load_namespace
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
|
|
* the RSDT/XSDT.
|
|
*
|
|
******************************************************************************/
|
|
static acpi_status acpi_tb_load_namespace(void)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_table_header *table;
|
|
u32 i;
|
|
|
|
ACPI_FUNCTION_TRACE(tb_load_namespace);
|
|
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
|
|
/*
|
|
* Load the namespace. The DSDT is required, but any SSDT and PSDT tables
|
|
* are optional.
|
|
*/
|
|
if (!acpi_gbl_root_table_list.count ||
|
|
!ACPI_COMPARE_NAME(&
|
|
(acpi_gbl_root_table_list.
|
|
tables[ACPI_TABLE_INDEX_DSDT].signature),
|
|
ACPI_SIG_DSDT)
|
|
||
|
|
ACPI_FAILURE(acpi_tb_verify_table
|
|
(&acpi_gbl_root_table_list.
|
|
tables[ACPI_TABLE_INDEX_DSDT]))) {
|
|
status = AE_NO_ACPI_TABLES;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/*
|
|
* Find DSDT table
|
|
*/
|
|
status =
|
|
acpi_os_table_override(acpi_gbl_root_table_list.
|
|
tables[ACPI_TABLE_INDEX_DSDT].pointer,
|
|
&table);
|
|
if (ACPI_SUCCESS(status) && table) {
|
|
/*
|
|
* DSDT table has been found
|
|
*/
|
|
acpi_tb_delete_table(&acpi_gbl_root_table_list.
|
|
tables[ACPI_TABLE_INDEX_DSDT]);
|
|
acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer =
|
|
table;
|
|
acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].length =
|
|
table->length;
|
|
acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].flags =
|
|
ACPI_TABLE_ORIGIN_UNKNOWN;
|
|
|
|
ACPI_INFO((AE_INFO, "Table DSDT replaced by host OS"));
|
|
acpi_tb_print_table_header(0, table);
|
|
|
|
if (no_auto_ssdt == 0) {
|
|
printk(KERN_WARNING "ACPI: DSDT override uses original SSDTs unless \"acpi_no_auto_ssdt\"\n");
|
|
}
|
|
}
|
|
|
|
status =
|
|
acpi_tb_verify_table(&acpi_gbl_root_table_list.
|
|
tables[ACPI_TABLE_INDEX_DSDT]);
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
/* A valid DSDT is required */
|
|
|
|
status = AE_NO_ACPI_TABLES;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
|
|
/*
|
|
* Load and parse tables.
|
|
*/
|
|
status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*
|
|
* Load any SSDT or PSDT tables. Note: Loop leaves tables locked
|
|
*/
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
|
|
if ((!ACPI_COMPARE_NAME
|
|
(&(acpi_gbl_root_table_list.tables[i].signature),
|
|
ACPI_SIG_SSDT)
|
|
&&
|
|
!ACPI_COMPARE_NAME(&
|
|
(acpi_gbl_root_table_list.tables[i].
|
|
signature), ACPI_SIG_PSDT))
|
|
||
|
|
ACPI_FAILURE(acpi_tb_verify_table
|
|
(&acpi_gbl_root_table_list.tables[i]))) {
|
|
continue;
|
|
}
|
|
|
|
if (no_auto_ssdt) {
|
|
printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n");
|
|
continue;
|
|
}
|
|
|
|
/* Ignore errors while loading tables, get as many as possible */
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
(void)acpi_ns_load_table(i, acpi_gbl_root_node);
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n"));
|
|
|
|
unlock_and_exit:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_load_tables
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_load_tables(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_load_tables);
|
|
|
|
/*
|
|
* Load the namespace from the tables
|
|
*/
|
|
status = acpi_tb_load_namespace();
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"While loading namespace from ACPI tables"));
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_load_tables)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_table_handler
|
|
*
|
|
* PARAMETERS: Handler - Table event handler
|
|
* Context - Value passed to the handler on each event
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install table event handler
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_install_table_handler(acpi_tbl_handler handler, void *context)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_install_table_handler);
|
|
|
|
if (!handler) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Don't allow more than one handler */
|
|
|
|
if (acpi_gbl_table_handler) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Install the handler */
|
|
|
|
acpi_gbl_table_handler = handler;
|
|
acpi_gbl_table_handler_context = context;
|
|
|
|
cleanup:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_install_table_handler)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_remove_table_handler
|
|
*
|
|
* PARAMETERS: Handler - Table event handler that was installed
|
|
* previously.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove table event handler
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_remove_table_handler(acpi_tbl_handler handler)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_remove_table_handler);
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Make sure that the installed handler is the same */
|
|
|
|
if (!handler || handler != acpi_gbl_table_handler) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
acpi_gbl_table_handler = NULL;
|
|
|
|
cleanup:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_remove_table_handler)
|
|
|
|
|
|
static int __init acpi_no_auto_ssdt_setup(char *s) {
|
|
|
|
printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n");
|
|
|
|
no_auto_ssdt = 1;
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup);
|