/*******************************************************************************
*
* FUNCTION: acpi_load_table
*
* PARAMETERS: table - Pointer to a buffer containing the ACPI
* table to be loaded.
*
* 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)
{
acpi_status status;
u32 table_index;
ACPI_FUNCTION_TRACE(acpi_load_table);
/* Parameter validation */
if (!table) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Must acquire the interpreter lock during this operation */
status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Install the table and load it into the namespace */
ACPI_INFO((AE_INFO, "Host-directed Dynamic ACPI Table Load:"));
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table),
ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
TRUE, FALSE, &table_index);
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
/*
* Note: Now table is "INSTALLED", it must be validated before
* using.
*/
status =
acpi_tb_validate_table(&acpi_gbl_root_table_list.
tables[table_index]);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
status = acpi_ns_load_table(table_index, acpi_gbl_root_node);
/* Invoke table handler if present */
if (acpi_gbl_table_handler) {
(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
acpi_gbl_table_handler_context);
}
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
return_ACPI_STATUS(status);
}
acpi_status ACPI_INIT_FUNCTION
acpi_install_table(acpi_physical_address address, u8 physical)
{
acpi_status status;
u8 flags;
u32 table_index;
ACPI_FUNCTION_TRACE(acpi_install_table);
if (physical) {
flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL;
} else {
flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL;
}
status = acpi_tb_install_standard_table(address, flags,
FALSE, FALSE, &table_index);
return_ACPI_STATUS(status);
}
void acpi_tb_parse_fadt(void)
{
u32 length;
struct acpi_table_header *table;
struct acpi_table_desc *fadt_desc;
acpi_status status;
/*
* The FADT has multiple versions with different lengths,
* and it contains pointers to both the DSDT and FACS tables.
*
* Get a local copy of the FADT and convert it to a common format
* Map entire FADT, assumed to be smaller than one page.
*/
fadt_desc = &acpi_gbl_root_table_list.tables[acpi_gbl_fadt_index];
status = acpi_tb_get_table(fadt_desc, &table);
if (ACPI_FAILURE(status)) {
return;
}
length = fadt_desc->length;
/*
* Validate the FADT checksum before we copy the table. Ignore
* checksum error as we want to try to get the DSDT and FACS.
*/
(void)acpi_tb_verify_checksum(table, length);
/* Create a local copy of the FADT in common ACPI 2.0+ format */
acpi_tb_create_local_fadt(table, length);
/* All done with the real FADT, unmap it */
acpi_tb_put_table(fadt_desc);
/* Obtain the DSDT and FACS tables via their addresses within the FADT */
acpi_tb_install_standard_table((acpi_physical_address)acpi_gbl_FADT.
Xdsdt,
ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
FALSE, TRUE, &acpi_gbl_dsdt_index);
/* If Hardware Reduced flag is set, there is no FACS */
if (!acpi_gbl_reduced_hardware) {
if (acpi_gbl_FADT.facs) {
acpi_tb_install_standard_table((acpi_physical_address)
acpi_gbl_FADT.facs,
ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
FALSE, TRUE,
&acpi_gbl_facs_index);
}
if (acpi_gbl_FADT.Xfacs) {
acpi_tb_install_standard_table((acpi_physical_address)
acpi_gbl_FADT.Xfacs,
ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
FALSE, TRUE,
&acpi_gbl_xfacs_index);
}
}
}