diff options
Diffstat (limited to 'drivers/acpi/tables/tbinstal.c')
| -rw-r--r-- | drivers/acpi/tables/tbinstal.c | 553 |
1 files changed, 553 insertions, 0 deletions
diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c new file mode 100644 index 0000000..85d5bb0 --- /dev/null +++ b/drivers/acpi/tables/tbinstal.c @@ -0,0 +1,553 @@ +/****************************************************************************** + * + * Module Name: tbinstal - ACPI table installation and removal + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * 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 <acpi/actables.h> + + +#define _COMPONENT ACPI_TABLES + ACPI_MODULE_NAME ("tbinstal") + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_match_signature + * + * PARAMETERS: Signature - Table signature to match + * table_info - Return data + * + * RETURN: Status + * + * DESCRIPTION: Compare signature against the list of "ACPI-subsystem-owned" + * tables (DSDT/FADT/SSDT, etc.) Returns the table_type_iD on match. + * + ******************************************************************************/ + +acpi_status +acpi_tb_match_signature ( + char *signature, + struct acpi_table_desc *table_info, + u8 search_type) +{ + acpi_native_uint i; + + + ACPI_FUNCTION_TRACE ("tb_match_signature"); + + + /* + * Search for a signature match among the known table types + */ + for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) { + if (!(acpi_gbl_table_data[i].flags & search_type)) { + continue; + } + + if (!ACPI_STRNCMP (signature, acpi_gbl_table_data[i].signature, + acpi_gbl_table_data[i].sig_length)) { + /* Found a signature match, return index if requested */ + + if (table_info) { + table_info->type = (u8) i; + } + + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, + "Table [%4.4s] is an ACPI table consumed by the core subsystem\n", + (char *) acpi_gbl_table_data[i].signature)); + + return_ACPI_STATUS (AE_OK); + } + } + + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, + "Table [%4.4s] is not an ACPI table consumed by the core subsystem - ignored\n", + (char *) signature)); + + return_ACPI_STATUS (AE_TABLE_NOT_SUPPORTED); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_install_table + * + * PARAMETERS: table_info - Return value from acpi_tb_get_table_body + * + * RETURN: Status + * + * DESCRIPTION: Load and validate all tables other than the RSDT. The RSDT must + * already be loaded and validated. + * Install the table into the global data structs. + * + ******************************************************************************/ + +acpi_status +acpi_tb_install_table ( + struct acpi_table_desc *table_info) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE ("tb_install_table"); + + + /* Lock tables while installing */ + + status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES); + if (ACPI_FAILURE (status)) { + ACPI_REPORT_ERROR (("Could not acquire table mutex for [%4.4s], %s\n", + table_info->pointer->signature, acpi_format_exception (status))); + return_ACPI_STATUS (status); + } + + /* Install the table into the global data structure */ + + status = acpi_tb_init_table_descriptor (table_info->type, table_info); + if (ACPI_FAILURE (status)) { + ACPI_REPORT_ERROR (("Could not install ACPI table [%4.4s], %s\n", + table_info->pointer->signature, acpi_format_exception (status))); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s located at %p\n", + acpi_gbl_table_data[table_info->type].name, table_info->pointer)); + + (void) acpi_ut_release_mutex (ACPI_MTX_TABLES); + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_recognize_table + * + * PARAMETERS: table_info - Return value from acpi_tb_get_table_body + * + * RETURN: Status + * + * DESCRIPTION: Check a table signature for a match against known table types + * + * NOTE: All table pointers are validated as follows: + * 1) Table pointer must point to valid physical memory + * 2) Signature must be 4 ASCII chars, even if we don't recognize the + * name + * 3) Table must be readable for length specified in the header + * 4) Table checksum must be valid (with the exception of the FACS + * which has no checksum for some odd reason) + * + ******************************************************************************/ + +acpi_status +acpi_tb_recognize_table ( + struct acpi_table_desc *table_info, + u8 search_type) +{ + struct acpi_table_header *table_header; + acpi_status status; + + + ACPI_FUNCTION_TRACE ("tb_recognize_table"); + + + /* Ensure that we have a valid table pointer */ + + table_header = (struct acpi_table_header *) table_info->pointer; + if (!table_header) { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* + * We only "recognize" a limited number of ACPI tables -- namely, the + * ones that are used by the subsystem (DSDT, FADT, etc.) + * + * An AE_TABLE_NOT_SUPPORTED means that the table was not recognized. + * This can be any one of many valid ACPI tables, it just isn't one of + * the tables that is consumed by the core subsystem + */ + status = acpi_tb_match_signature (table_header->signature, table_info, search_type); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + status = acpi_tb_validate_table_header (table_header); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Return the table type and length via the info struct */ + + table_info->length = (acpi_size) table_header->length; + + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_init_table_descriptor + * + * PARAMETERS: table_type - The type of the table + * table_info - A table info struct + * + * RETURN: None. + * + * DESCRIPTION: Install a table into the global data structs. + * + ******************************************************************************/ + +acpi_status +acpi_tb_init_table_descriptor ( + acpi_table_type table_type, + struct acpi_table_desc *table_info) +{ + struct acpi_table_list *list_head; + struct acpi_table_desc *table_desc; + + + ACPI_FUNCTION_TRACE_U32 ("tb_init_table_descriptor", table_type); + + + /* Allocate a descriptor for this table */ + + table_desc = ACPI_MEM_CALLOCATE (sizeof (struct acpi_table_desc)); + if (!table_desc) { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* + * Install the table into the global data structure + */ + list_head = &acpi_gbl_table_lists[table_type]; + + /* + * Two major types of tables: 1) Only one instance is allowed. This + * includes most ACPI tables such as the DSDT. 2) Multiple instances of + * the table are allowed. This includes SSDT and PSDTs. + */ + if (ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags)) { + /* + * Only one table allowed, and a table has alread been installed + * at this location, so return an error. + */ + if (list_head->next) { + ACPI_MEM_FREE (table_desc); + return_ACPI_STATUS (AE_ALREADY_EXISTS); + } + + table_desc->next = list_head->next; + list_head->next = table_desc; + + if (table_desc->next) { + table_desc->next->prev = table_desc; + } + + list_head->count++; + } + else { + /* + * Link the new table in to the list of tables of this type. + * Insert at the end of the list, order IS IMPORTANT. + * + * table_desc->Prev & Next are already NULL from calloc() + */ + list_head->count++; + + if (!list_head->next) { + list_head->next = table_desc; + } + else { + table_desc->next = list_head->next; + + while (table_desc->next->next) { + table_desc->next = table_desc->next->next; + } + + table_desc->next->next = table_desc; + table_desc->prev = table_desc->next; + table_desc->next = NULL; + } + } + + /* Finish initialization of the table descriptor */ + + table_desc->type = (u8) table_type; + table_desc->pointer = table_info->pointer; + table_desc->length = table_info->length; + table_desc->allocation = table_info->allocation; + table_desc->aml_start = (u8 *) (table_desc->pointer + 1), + table_desc->aml_length = (u32) (table_desc->length - + (u32) sizeof (struct acpi_table_header)); + table_desc->table_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_TABLE); + table_desc->loaded_into_namespace = FALSE; + + /* + * Set the appropriate global pointer (if there is one) to point to the + * newly installed table + */ + if (acpi_gbl_table_data[table_type].global_ptr) { + *(acpi_gbl_table_data[table_type].global_ptr) = table_info->pointer; + } + + /* Return Data */ + + table_info->table_id = table_desc->table_id; + table_info->installed_desc = table_desc; + + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_delete_all_tables + * + * PARAMETERS: None. + * + * RETURN: None. + * + * DESCRIPTION: Delete all internal ACPI tables + * + ******************************************************************************/ + +void +acpi_tb_delete_all_tables (void) +{ + acpi_table_type type; + + + /* + * Free memory allocated for ACPI tables + * Memory can either be mapped or allocated + */ + for (type = 0; type < NUM_ACPI_TABLE_TYPES; type++) { + acpi_tb_delete_tables_by_type (type); + } +} + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_delete_tables_by_type + * + * PARAMETERS: Type - The table type to be deleted + * + * RETURN: None. + * + * DESCRIPTION: Delete an internal ACPI table + * Locks the ACPI table mutex + * + ******************************************************************************/ + +void +acpi_tb_delete_tables_by_type ( + acpi_table_type type) +{ + struct acpi_table_desc *table_desc; + u32 count; + u32 i; + + + ACPI_FUNCTION_TRACE_U32 ("tb_delete_tables_by_type", type); + + + if (type > ACPI_TABLE_MAX) { + return_VOID; + } + + if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_TABLES))) { + return; + } + + /* Clear the appropriate "typed" global table pointer */ + + switch (type) { + case ACPI_TABLE_RSDP: + acpi_gbl_RSDP = NULL; + break; + + case ACPI_TABLE_DSDT: + acpi_gbl_DSDT = NULL; + break; + + case ACPI_TABLE_FADT: + acpi_gbl_FADT = NULL; + break; + + case ACPI_TABLE_FACS: + acpi_gbl_FACS = NULL; + break; + + case ACPI_TABLE_XSDT: + acpi_gbl_XSDT = NULL; + break; + + case ACPI_TABLE_SSDT: + case ACPI_TABLE_PSDT: + default: + break; + } + + /* + * Free the table + * 1) Get the head of the list + */ + table_desc = acpi_gbl_table_lists[type].next; + count = acpi_gbl_table_lists[type].count; + + /* + * 2) Walk the entire list, deleting both the allocated tables + * and the table descriptors + */ + for (i = 0; i < count; i++) { + table_desc = acpi_tb_uninstall_table (table_desc); + } + + (void) acpi_ut_release_mutex (ACPI_MTX_TABLES); + return_VOID; +} + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_delete_single_table + * + * PARAMETERS: table_info - A table info struct + * + * RETURN: None. + * + * DESCRIPTION: Low-level free for a single ACPI table. Handles cases where + * the table was allocated a buffer or was mapped. + * + ******************************************************************************/ + +void +acpi_tb_delete_single_table ( + struct acpi_table_desc *table_desc) +{ + + /* Must have a valid table descriptor and pointer */ + + if ((!table_desc) || + (!table_desc->pointer)) { + return; + } + + /* Valid table, determine type of memory allocation */ + + switch (table_desc->allocation) { + case ACPI_MEM_NOT_ALLOCATED: + break; + + case ACPI_MEM_ALLOCATED: + + ACPI_MEM_FREE (table_desc->pointer); + break; + + case ACPI_MEM_MAPPED: + + acpi_os_unmap_memory (table_desc->pointer, table_desc->length); + break; + + default: + break; + } +} + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_uninstall_table + * + * PARAMETERS: table_info - A table info struct + * + * RETURN: Pointer to the next table in the list (of same type) + * + * DESCRIPTION: Free the memory associated with an internal ACPI table that + * is either installed or has never been installed. + * Table mutex should be locked. + * + ******************************************************************************/ + +struct acpi_table_desc * +acpi_tb_uninstall_table ( + struct acpi_table_desc *table_desc) +{ + struct acpi_table_desc *next_desc; + + + ACPI_FUNCTION_TRACE_PTR ("tb_uninstall_table", table_desc); + + + if (!table_desc) { + return_PTR (NULL); + } + + /* Unlink the descriptor from the doubly linked list */ + + if (table_desc->prev) { + table_desc->prev->next = table_desc->next; + } + else { + /* Is first on list, update list head */ + + acpi_gbl_table_lists[table_desc->type].next = table_desc->next; + } + + if (table_desc->next) { + table_desc->next->prev = table_desc->prev; + } + + /* Free the memory allocated for the table itself */ + + acpi_tb_delete_single_table (table_desc); + + /* Free the table descriptor */ + + next_desc = table_desc->next; + ACPI_MEM_FREE (table_desc); + + /* Return pointer to the next descriptor */ + + return_PTR (next_desc); +} + + |