0,0 → 1,482 |
/****************************************************************************** |
* |
* Module Name: tbxface - ACPI table-oriented external interfaces |
* |
*****************************************************************************/ |
|
/* |
* 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. |
*/ |
|
#define EXPORT_ACPI_INTERFACES |
|
#include <acpi/acpi.h> |
#include "accommon.h" |
#include "actables.h" |
|
#define _COMPONENT ACPI_TABLES |
ACPI_MODULE_NAME("tbxface") |
|
/******************************************************************************* |
* |
* 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 iASL compiler and |
* acpi_initialize_tables. |
* |
******************************************************************************/ |
acpi_status acpi_allocate_root_table(u32 initial_table_count) |
{ |
|
acpi_gbl_root_table_list.max_table_count = 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_resize - 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); |
|
/* |
* Setup the Root Table Array and 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 */ |
|
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.max_table_count = 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); |
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL_INIT(acpi_initialize_tables) |
|
/******************************************************************************* |
* |
* 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 __init acpi_reallocate_root_table(void) |
{ |
acpi_status status; |
|
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); |
} |
|
acpi_gbl_root_table_list.flags |= ACPI_ROOT_ALLOW_RESIZE; |
|
status = acpi_tb_resize_root_table_list(); |
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL_INIT(acpi_reallocate_root_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.current_table_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_INTERNAL_PHYSICAL) { |
header = |
acpi_os_map_memory(acpi_gbl_root_table_list. |
tables[i].address, |
sizeof(struct |
acpi_table_header)); |
if (!header) { |
return (AE_NO_MEMORY); |
} |
|
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 { |
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_get_table_with_size |
* |
* 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 the requested table |
* |
* DESCRIPTION: Finds and verifies an ACPI table. Table must be in the |
* RSDT/XSDT. |
* |
******************************************************************************/ |
acpi_status |
acpi_get_table_with_size(char *signature, |
u32 instance, struct acpi_table_header **out_table, |
acpi_size *tbl_size) |
{ |
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.current_table_count; |
i++) { |
if (!ACPI_COMPARE_NAME |
(&(acpi_gbl_root_table_list.tables[i].signature), |
signature)) { |
continue; |
} |
|
if (++j < instance) { |
continue; |
} |
|
status = |
acpi_tb_validate_table(&acpi_gbl_root_table_list.tables[i]); |
if (ACPI_SUCCESS(status)) { |
*out_table = acpi_gbl_root_table_list.tables[i].pointer; |
*tbl_size = acpi_gbl_root_table_list.tables[i].length; |
} |
|
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_with_size) |
|
acpi_status |
acpi_get_table(char *signature, |
u32 instance, struct acpi_table_header **out_table) |
{ |
acpi_size tbl_size; |
|
return acpi_get_table_with_size(signature, |
instance, out_table, &tbl_size); |
} |
|
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 requested table |
* |
* DESCRIPTION: Obtain a table by an index into the global table list. Used |
* internally also. |
* |
******************************************************************************/ |
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.current_table_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_validate_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_install_table_handler |
* |
* PARAMETERS: handler - Table event handler |
* context - Value passed to the handler on each event |
* |
* RETURN: Status |
* |
* DESCRIPTION: Install a global table event handler. |
* |
******************************************************************************/ |
acpi_status |
acpi_install_table_handler(acpi_table_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 a table event handler |
* |
******************************************************************************/ |
acpi_status acpi_remove_table_handler(acpi_table_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) |