/******************************************************************************* * * FUNCTION: acpi_load_tables * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT *
******************************************************************************/
acpi_status ACPI_INIT_FUNCTION acpi_load_tables(void)
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_load_tables);
/* * Install the default operation region handlers. These are the * handlers that are defined by the ACPI specification to be * "always accessible" -- namely, system_memory, system_IO, and * PCI_Config. This also means that no _REG methods need to be * run for these address spaces. We need to have these handlers * installed before any AML code can be executed, especially any * module-level code (11/2015). * Note that we allow OSPMs to install their own region handlers * between acpi_initialize_subsystem() and acpi_load_tables() to use * their customized default region handlers.
*/
status = acpi_ev_install_region_handlers(); if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "During Region initialization"));
return_ACPI_STATUS(status);
}
/* Load the namespace from the tables */
status = acpi_tb_load_namespace();
/* Don't let single failures abort the load */
if (status == AE_CTRL_TERMINATE) {
status = AE_OK;
}
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "While loading namespace from ACPI tables"));
}
/* * Initialize the objects in the namespace that remain uninitialized. * This runs the executable AML that may be part of the declaration of * these name objects: * operation_regions, buffer_fields, Buffers, and Packages. *
*/
status = acpi_ns_initialize_objects(); if (ACPI_SUCCESS(status)) {
acpi_gbl_namespace_initialized = TRUE;
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables)
/******************************************************************************* * * 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. *
******************************************************************************/
acpi_status acpi_tb_load_namespace(void)
{
acpi_status status;
u32 i; struct acpi_table_header *new_dsdt; struct acpi_table_desc *table;
u32 tables_loaded = 0;
u32 tables_failed = 0;
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. Verify the DSDT.
*/
table = &acpi_gbl_root_table_list.tables[acpi_gbl_dsdt_index];
if (!acpi_gbl_root_table_list.current_table_count ||
!ACPI_COMPARE_NAMESEG(table->signature.ascii, ACPI_SIG_DSDT) ||
ACPI_FAILURE(acpi_tb_validate_table(table))) {
status = AE_NO_ACPI_TABLES; goto unlock_and_exit;
}
/* * Save the DSDT pointer for simple access. This is the mapped memory * address. We must take care here because the address of the .Tables * array can change dynamically as tables are loaded at run-time. Note: * .Pointer field is not validated until after call to acpi_tb_validate_table.
*/
acpi_gbl_DSDT = table->pointer;
/* * Optionally copy the entire DSDT to local memory (instead of simply * mapping it.) There are some BIOSs that corrupt or replace the original * DSDT, creating the need for this option. Default is FALSE, do not copy * the DSDT.
*/ if (acpi_gbl_copy_dsdt_locally) {
new_dsdt = acpi_tb_copy_dsdt(acpi_gbl_dsdt_index); if (new_dsdt) {
acpi_gbl_DSDT = new_dsdt;
}
}
/* * Save the original DSDT header for detection of table corruption * and/or replacement of the DSDT from outside the OS.
*/
memcpy(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT, sizeof(struct acpi_table_header));
/******************************************************************************* * * FUNCTION: acpi_install_table * * PARAMETERS: table - Pointer to the ACPI table to be installed. * * RETURN: Status * * DESCRIPTION: Dynamically install an ACPI table. * Note: This function should only be invoked after * acpi_initialize_tables() and before acpi_load_tables(). *
******************************************************************************/
status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table),
ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
table, FALSE, FALSE,
&table_index);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL_INIT(acpi_install_table)
/******************************************************************************* * * FUNCTION: acpi_install_physical_table * * PARAMETERS: address - Address of the ACPI table to be installed. * * RETURN: Status * * DESCRIPTION: Dynamically install an ACPI table. * Note: This function should only be invoked after * acpi_initialize_tables() and before acpi_load_tables(). *
******************************************************************************/
acpi_status ACPI_INIT_FUNCTION
acpi_install_physical_table(acpi_physical_address address)
{
acpi_status status;
u32 table_index;
ACPI_FUNCTION_TRACE(acpi_install_physical_table);
status = acpi_tb_install_standard_table(address,
ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
NULL, FALSE, FALSE,
&table_index);
/******************************************************************************* * * FUNCTION: acpi_load_table * * PARAMETERS: table - Pointer to a buffer containing the ACPI * table to be loaded. * table_idx - Pointer to a u32 for storing the table * index, might be NULL * * RETURN: Status * * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must * be a valid ACPI table with a valid ACPI table header. * Note1: Mainly intended to support hotplug addition of SSDTs. * Note2: Does not copy the incoming table. User is responsible * to ensure that the table is not deleted or unmapped. *
******************************************************************************/
acpi_status acpi_load_table(struct acpi_table_header *table, u32 *table_idx)
{
acpi_status status;
u32 table_index;
ACPI_FUNCTION_TRACE(acpi_load_table);
/* Parameter validation */
if (!table) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Install the table and load it into the namespace */
ACPI_INFO(("Host-directed Dynamic ACPI Table Load:"));
status = acpi_tb_install_and_load_table(ACPI_PTR_TO_PHYSADDR(table),
ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
table, FALSE, &table_index); if (table_idx) {
*table_idx = table_index;
}
if (ACPI_SUCCESS(status)) {
/* Complete the initialization/resolution of new objects */
acpi_ns_initialize_objects();
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_load_table)
/******************************************************************************* * * FUNCTION: acpi_unload_parent_table * * PARAMETERS: object - Handle to any namespace object owned by * the table to be unloaded * * RETURN: Status * * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads * the table and deletes all namespace objects associated with * that table. Unloading of the DSDT is not allowed. * Note: Mainly intended to support hotplug removal of SSDTs. *
******************************************************************************/
acpi_status acpi_unload_parent_table(acpi_handle object)
{ struct acpi_namespace_node *node =
ACPI_CAST_PTR(struct acpi_namespace_node, object);
acpi_status status = AE_NOT_EXIST;
acpi_owner_id owner_id;
u32 i;
ACPI_FUNCTION_TRACE(acpi_unload_parent_table);
/* Parameter validation */
if (!object) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* * The node owner_id is currently the same as the parent table ID. * However, this could change in the future.
*/
owner_id = node->owner_id; if (!owner_id) {
/* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */
return_ACPI_STATUS(AE_TYPE);
}
/* Must acquire the table lock during this operation */
status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES); if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Find the table in the global table list */
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) { if (owner_id != acpi_gbl_root_table_list.tables[i].owner_id) { continue;
}
/* * Allow unload of SSDT and OEMx tables only. Do not allow unload * of the DSDT. No other types of tables should get here, since * only these types can contain AML and thus are the only types * that can create namespace objects.
*/ if (ACPI_COMPARE_NAMESEG
(acpi_gbl_root_table_list.tables[i].signature.ascii,
ACPI_SIG_DSDT)) {
status = AE_TYPE; break;
}
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
status = acpi_tb_unload_table(i);
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); break;
}
ACPI_EXPORT_SYMBOL(acpi_unload_parent_table) /******************************************************************************* * * FUNCTION: acpi_unload_table * * PARAMETERS: table_index - Index as returned by acpi_load_table * * RETURN: Status * * DESCRIPTION: Via the table_index representing an SSDT or OEMx table, unloads * the table and deletes all namespace objects associated with * that table. Unloading of the DSDT is not allowed. * Note: Mainly intended to support hotplug removal of SSDTs. *
******************************************************************************/
acpi_status acpi_unload_table(u32 table_index)
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_unload_table);
if (table_index == 1) {
/* table_index==1 means DSDT is the owner. DSDT cannot be unloaded */
return_ACPI_STATUS(AE_TYPE);
}
status = acpi_tb_unload_table(table_index);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_unload_table)
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