#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME("tbinstal")
+/* Local prototypes */
+static acpi_status
+acpi_tb_acquire_temporal_table(struct acpi_table_desc *table_desc,
+ acpi_physical_address address, u8 flags);
+
+static void acpi_tb_release_temporal_table(struct acpi_table_desc *table_desc);
+
+static acpi_status acpi_tb_acquire_root_table_entry(u32 *table_index);
+
+static u8
+acpi_tb_is_equivalent_table(struct acpi_table_desc *table_desc,
+ u32 table_index);
+
/*******************************************************************************
*
* FUNCTION: acpi_tb_acquire_table
* acpi_gbl_root_table_list.
*
******************************************************************************/
+
acpi_status
acpi_tb_acquire_table(struct acpi_table_desc *table_desc,
struct acpi_table_header **table_ptr,
*
* RETURN: Status
*
- * DESCRIPTION: This function is called to validate (ensure Pointer is valid)
- * and verify the table.
+ * DESCRIPTION: This function is called to validate the table, the returned
+ * table descriptor is in "VALIDATED" state.
*
*****************************************************************************/
status = acpi_tb_acquire_table(table_desc, &table_desc->pointer,
&table_desc->length,
&table_desc->flags);
- if (ACPI_FAILURE(status) || !table_desc->pointer) {
- return_ACPI_STATUS(AE_NO_MEMORY);
+ if (!table_desc->pointer) {
+ status = AE_NO_MEMORY;
}
}
- /* Always calculate checksum, ignore bad checksum if requested */
-
- status =
- acpi_tb_verify_checksum(table_desc->pointer, table_desc->length);
-
return_ACPI_STATUS(status);
}
return_VOID;
}
-/*******************************************************************************
+/******************************************************************************
*
- * FUNCTION: acpi_tb_add_table
+ * FUNCTION: acpi_tb_verify_table
*
* PARAMETERS: table_desc - Table descriptor
- * table_index - Where the table index is returned
+ * signature - Table signature to verify
*
* RETURN: Status
*
- * DESCRIPTION: This function is called to add an ACPI table. It is used to
- * dynamically load tables via the Load and load_table AML
- * operators.
+ * DESCRIPTION: This function is called to validate and verify the table, the
+ * returned table descriptor is in "VALIDATED" state.
*
- ******************************************************************************/
+ *****************************************************************************/
acpi_status
-acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
+acpi_tb_verify_table(struct acpi_table_desc *table_desc, char *signature)
{
- u32 i;
acpi_status status = AE_OK;
- struct acpi_table_header *final_table;
- ACPI_FUNCTION_TRACE(tb_add_table);
+ ACPI_FUNCTION_TRACE(tb_verify_table);
- if (!table_desc->pointer) {
- status = acpi_tb_validate_table(table_desc);
- if (ACPI_FAILURE(status) || !table_desc->pointer) {
- acpi_tb_invalidate_table(table_desc);
- return_ACPI_STATUS(status);
- }
+ /* Validate the table */
+
+ status = acpi_tb_validate_table(table_desc);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(AE_NO_MEMORY);
}
- /*
- * Validate the incoming table signature.
- *
- * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
- * 2) We added support for OEMx tables, signature "OEM".
- * 3) Valid tables were encountered with a null signature, so we just
- * gave up on validating the signature, (05/2008).
- * 4) We encountered non-AML tables such as the MADT, which caused
- * interpreter errors and kernel faults. So now, we once again allow
- * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
- */
- if ((table_desc->pointer->signature[0] != 0x00) &&
- (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT))
- && (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) {
+ /* If a particular signature is expected (DSDT/FACS), it must match */
+
+ if (signature && !ACPI_COMPARE_NAME(&table_desc->signature, signature)) {
ACPI_BIOS_ERROR((AE_INFO,
- "Table has invalid signature [%4.4s] (0x%8.8X), "
- "must be SSDT or OEMx",
- acpi_ut_valid_acpi_name(table_desc->pointer->
- signature) ?
- table_desc->pointer->signature : "????",
- *(u32 *)table_desc->pointer->signature));
+ "Invalid signature 0x%X for ACPI table, expected [%s]",
+ table_desc->signature.integer, signature));
+ status = AE_BAD_SIGNATURE;
+ goto invalidate_and_exit;
+ }
+
+ /* Verify the checksum */
- return_ACPI_STATUS(AE_BAD_SIGNATURE);
+ status =
+ acpi_tb_verify_checksum(table_desc->pointer, table_desc->length);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
+ "%4.4s " ACPI_PRINTF_UINT
+ " Attempted table install failed",
+ acpi_ut_valid_acpi_name(table_desc->signature.
+ ascii) ? table_desc->
+ signature.ascii : "????",
+ ACPI_FORMAT_TO_UINT(table_desc->address)));
+ goto invalidate_and_exit;
}
- (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+ return_ACPI_STATUS(AE_OK);
- /* Check if table is already registered */
+invalidate_and_exit:
+ acpi_tb_invalidate_table(table_desc);
+ return_ACPI_STATUS(status);
+}
- for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
- if (!acpi_gbl_root_table_list.tables[i].pointer) {
- status =
- acpi_tb_validate_table(&acpi_gbl_root_table_list.
- tables[i]);
- if (ACPI_FAILURE(status)
- || !acpi_gbl_root_table_list.tables[i].pointer) {
- continue;
- }
- }
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_install_table
+ *
+ * PARAMETERS: table_desc - Table descriptor
+ * address - Physical address of the table
+ * flags - Allocation flags of the table
+ * table - Pointer to the table
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Install an ACPI table into the global data structure.
+ *
+ ******************************************************************************/
- /*
- * Check for a table match on the entire table length,
- * not just the header.
- */
- if (table_desc->length !=
- acpi_gbl_root_table_list.tables[i].length) {
- continue;
+void
+acpi_tb_install_table(struct acpi_table_desc *table_desc,
+ acpi_physical_address address,
+ u8 flags, struct acpi_table_header *table)
+{
+ /*
+ * Initialize the table entry. Set the pointer to NULL, since the
+ * table is not fully mapped at this time.
+ */
+ ACPI_MEMSET(table_desc, 0, sizeof(struct acpi_table_desc));
+ table_desc->address = address;
+ table_desc->length = table->length;
+ table_desc->flags = flags;
+ ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_acquire_temporal_table
+ *
+ * PARAMETERS: table_desc - Table descriptor to be acquired
+ * address - Address of the table
+ * flags - Allocation flags of the table
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This function validates the table header to obtain the length
+ * of a table and fills the table descriptor to make its state as
+ * "INSTALLED". Such table descriptor is only used for verified
+ * installation.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_tb_acquire_temporal_table(struct acpi_table_desc *table_desc,
+ acpi_physical_address address, u8 flags)
+{
+ struct acpi_table_header *table_header;
+
+ switch (flags & ACPI_TABLE_ORIGIN_MASK) {
+ case ACPI_TABLE_ORIGIN_MAPPED:
+
+ /* Try to obtain the length of the table */
+
+ table_header =
+ acpi_os_map_memory(address,
+ sizeof(struct acpi_table_header));
+ if (!table_header) {
+ return (AE_NO_MEMORY);
}
+ acpi_tb_install_table(table_desc, address, flags, table_header);
+ acpi_os_unmap_memory(table_header,
+ sizeof(struct acpi_table_header));
+ return (AE_OK);
- if (ACPI_MEMCMP(table_desc->pointer,
- acpi_gbl_root_table_list.tables[i].pointer,
- acpi_gbl_root_table_list.tables[i].length)) {
- continue;
+ case ACPI_TABLE_ORIGIN_ALLOCATED:
+ case ACPI_TABLE_ORIGIN_UNKNOWN:
+ case ACPI_TABLE_ORIGIN_OVERRIDE:
+
+ table_header = ACPI_CAST_PTR(struct acpi_table_header, address);
+ if (!table_header) {
+ return (AE_NO_MEMORY);
}
+ acpi_tb_install_table(table_desc, address, flags, table_header);
+ return (AE_OK);
- /*
- * Note: the current mechanism does not unregister a table if it is
- * dynamically unloaded. The related namespace entries are deleted,
- * but the table remains in the root table list.
- *
- * The assumption here is that the number of different tables that
- * will be loaded is actually small, and there is minimal overhead
- * in just keeping the table in case it is needed again.
- *
- * If this assumption changes in the future (perhaps on large
- * machines with many table load/unload operations), tables will
- * need to be unregistered when they are unloaded, and slots in the
- * root table list should be reused when empty.
- */
- *table_index = i;
+ default:
- if (acpi_gbl_root_table_list.tables[i].
- flags & ACPI_TABLE_IS_LOADED) {
+ break;
+ }
- /* Table is still loaded, this is an error */
+ /* Table is not valid yet */
- status = AE_ALREADY_EXISTS;
- goto release;
- } else {
- /* Table was unloaded, allow it to be reloaded */
-
- acpi_tb_uninstall_table(table_desc);
- table_desc->pointer =
- acpi_gbl_root_table_list.tables[i].pointer;
- table_desc->address =
- acpi_gbl_root_table_list.tables[i].address;
- status = AE_OK;
- goto print_header;
- }
+ return (AE_NO_MEMORY);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_release_temporal_table
+ *
+ * PARAMETERS: table_desc - Table descriptor to be released
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: The reversal of acpi_tb_acquire_temporal_table().
+ *
+ ******************************************************************************/
+
+static void acpi_tb_release_temporal_table(struct acpi_table_desc *table_desc)
+{
+ /*
+ * Note that the .Address is maintained by the callers of
+ * acpi_tb_acquire_temporal_table(), thus do not invoke acpi_tb_uninstall_table()
+ * where .Address will be freed.
+ */
+ acpi_tb_invalidate_table(table_desc);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_install_and_override_table
+ *
+ * PARAMETERS: table_index - Index into root table array
+ * new_table_desc - New table descriptor to install
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Install an ACPI table into the global data structure. The
+ * table override mechanism is called to allow the host
+ * OS to replace any table before it is installed in the root
+ * table array.
+ *
+ ******************************************************************************/
+
+void
+acpi_tb_install_and_override_table(u32 table_index,
+ struct acpi_table_desc *new_table_desc)
+{
+ if (table_index >= acpi_gbl_root_table_list.current_table_count) {
+ return;
}
/*
* ACPI Table Override:
- * Allow the host to override dynamically loaded tables.
- * NOTE: the table is fully mapped at this point, and the mapping will
- * be deleted by acpi_tb_override_table if the table is actually overridden.
+ *
+ * Before we install the table, let the host OS override it with a new
+ * one if desired. Any table within the RSDT/XSDT can be replaced,
+ * including the DSDT which is pointed to by the FADT.
*/
- final_table = acpi_tb_override_table(table_desc->pointer, table_desc);
- if (final_table) {
+ acpi_tb_override_table(new_table_desc);
+
+ acpi_tb_install_table(&acpi_gbl_root_table_list.tables[table_index],
+ new_table_desc->address, new_table_desc->flags,
+ new_table_desc->pointer);
- /* Ensure table descriptor is in "VALIDATED" state */
+ acpi_tb_print_table_header(new_table_desc->address,
+ new_table_desc->pointer);
- table_desc->pointer = final_table;
+ /* Set the global integer width (based upon revision of the DSDT) */
+
+ if (table_index == ACPI_TABLE_INDEX_DSDT) {
+ acpi_ut_set_integer_width(new_table_desc->pointer->revision);
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_install_fixed_table
+ *
+ * PARAMETERS: address - Physical address of DSDT or FACS
+ * signature - Table signature, NULL if no need to
+ * match
+ * table_index - Index into root table array
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Install a fixed ACPI table (DSDT/FACS) into the global data
+ * structure.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_install_fixed_table(acpi_physical_address address,
+ char *signature, u32 table_index)
+{
+ struct acpi_table_desc new_table_desc;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(tb_install_fixed_table);
+
+ if (!address) {
+ ACPI_ERROR((AE_INFO,
+ "Null physical address for ACPI table [%s]",
+ signature));
+ return (AE_NO_MEMORY);
+ }
+
+ /* Fill a table descriptor for validation */
+
+ status = acpi_tb_acquire_temporal_table(&new_table_desc, address,
+ ACPI_TABLE_ORIGIN_MAPPED);
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR((AE_INFO, "Could not acquire table length at %p",
+ ACPI_CAST_PTR(void, address)));
+ return_ACPI_STATUS(status);
+ }
+
+ /* Validate and verify a table before installation */
+
+ status = acpi_tb_verify_table(&new_table_desc, signature);
+ if (ACPI_FAILURE(status)) {
+ goto release_and_exit;
+ }
+
+ acpi_tb_install_and_override_table(table_index, &new_table_desc);
+
+release_and_exit:
+
+ /* Release the temporal table descriptor */
+
+ acpi_tb_release_temporal_table(&new_table_desc);
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_is_equivalent_table
+ *
+ * PARAMETERS: table_desc - Table 1 descriptor to be compared
+ * table_index - Index of table 2 to be compared
+ *
+ * RETURN: TRUE if 2 tables are equivalent
+ *
+ * DESCRIPTION: This function is called to compare a table with what have
+ * already been installed in the root table list.
+ *
+ ******************************************************************************/
+
+static u8
+acpi_tb_is_equivalent_table(struct acpi_table_desc *table_desc, u32 table_index)
+{
+ acpi_status status = AE_OK;
+ u8 is_equivalent;
+ struct acpi_table_header *table;
+ u32 table_length;
+ u8 table_flags;
+
+ status =
+ acpi_tb_acquire_table(&acpi_gbl_root_table_list.tables[table_index],
+ &table, &table_length, &table_flags);
+ if (ACPI_FAILURE(status)) {
+ return (FALSE);
+ }
+
+ /*
+ * Check for a table match on the entire table length,
+ * not just the header.
+ */
+ is_equivalent = (u8)((table_desc->length != table_length ||
+ ACPI_MEMCMP(table_desc->pointer, table,
+ table_length)) ? FALSE : TRUE);
+
+ /* Release the acquired table */
+
+ acpi_tb_release_table(table, table_length, table_flags);
+
+ return (is_equivalent);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_install_non_fixed_table
+ *
+ * PARAMETERS: address - Address of the table (might be a logical
+ * address depending on the table_flags)
+ * flags - Flags for the table
+ * reload - Whether reload should be performed
+ * table_index - Where the table index is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This function is called to install an ACPI table that is
+ * neither DSDT nor FACS.
+ * When this function is called by "Load" or "LoadTable" opcodes,
+ * or by acpi_load_table() API, the "Reload" parameter is set.
+ * After sucessfully returning from this function, table is
+ * "INSTALLED" but not "VALIDATED".
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_install_non_fixed_table(acpi_physical_address address,
+ u8 flags, u8 reload, u32 *table_index)
+{
+ u32 i;
+ acpi_status status = AE_OK;
+ struct acpi_table_desc new_table_desc;
+
+ ACPI_FUNCTION_TRACE(tb_install_non_fixed_table);
+
+ /* Acquire a temporal table descriptor for validation */
+
+ status =
+ acpi_tb_acquire_temporal_table(&new_table_desc, address, flags);
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR((AE_INFO, "Could not acquire table length at %p",
+ ACPI_CAST_PTR(void, address)));
+ return_ACPI_STATUS(status);
+ }
+
+ /* Validate and verify a table before installation */
+
+ status = acpi_tb_verify_table(&new_table_desc, NULL);
+ if (ACPI_FAILURE(status)) {
+ goto release_and_exit;
+ }
+
+ if (reload) {
+ /*
+ * Validate the incoming table signature.
+ *
+ * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
+ * 2) We added support for OEMx tables, signature "OEM".
+ * 3) Valid tables were encountered with a null signature, so we just
+ * gave up on validating the signature, (05/2008).
+ * 4) We encountered non-AML tables such as the MADT, which caused
+ * interpreter errors and kernel faults. So now, we once again allow
+ * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
+ */
+ if ((new_table_desc.signature.ascii[0] != 0x00) &&
+ (!ACPI_COMPARE_NAME
+ (&new_table_desc.signature, ACPI_SIG_SSDT))
+ && (ACPI_STRNCMP(new_table_desc.signature.ascii, "OEM", 3)))
+ {
+ ACPI_BIOS_ERROR((AE_INFO,
+ "Table has invalid signature [%4.4s] (0x%8.8X), "
+ "must be SSDT or OEMx",
+ acpi_ut_valid_acpi_name(new_table_desc.
+ signature.
+ ascii) ?
+ new_table_desc.signature.
+ ascii : "????",
+ new_table_desc.signature.integer));
+
+ status = AE_BAD_SIGNATURE;
+ goto release_and_exit;
+ }
+
+ /* Check if table is already registered */
+
+ for (i = 0; i < acpi_gbl_root_table_list.current_table_count;
+ ++i) {
+ /*
+ * Check for a table match on the entire table length,
+ * not just the header.
+ */
+ if (!acpi_tb_is_equivalent_table(&new_table_desc, i)) {
+ continue;
+ }
+
+ /*
+ * Note: the current mechanism does not unregister a table if it is
+ * dynamically unloaded. The related namespace entries are deleted,
+ * but the table remains in the root table list.
+ *
+ * The assumption here is that the number of different tables that
+ * will be loaded is actually small, and there is minimal overhead
+ * in just keeping the table in case it is needed again.
+ *
+ * If this assumption changes in the future (perhaps on large
+ * machines with many table load/unload operations), tables will
+ * need to be unregistered when they are unloaded, and slots in the
+ * root table list should be reused when empty.
+ */
+ if (acpi_gbl_root_table_list.tables[i].
+ flags & ACPI_TABLE_IS_LOADED) {
+
+ /* Table is still loaded, this is an error */
+
+ status = AE_ALREADY_EXISTS;
+ goto release_and_exit;
+ } else {
+ /*
+ * Table was unloaded, allow it to be reloaded.
+ * As we are going to return AE_OK to the caller, we should
+ * take the responsibility of freeing the input descriptor.
+ * Refill the input descriptor to ensure
+ * acpi_tb_install_and_override_table() can be called again to
+ * indicate the re-installation.
+ */
+ acpi_tb_uninstall_table(&new_table_desc);
+ *table_index = i;
+ (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+ return_ACPI_STATUS(AE_OK);
+ }
+ }
}
/* Add the table to the global root table list */
- status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
- table_desc->length, table_desc->flags,
- table_index);
+ status = acpi_tb_acquire_root_table_entry(&i);
if (ACPI_FAILURE(status)) {
- goto release;
+ goto release_and_exit;
}
+ *table_index = i;
+ acpi_tb_install_and_override_table(i, &new_table_desc);
-print_header:
- acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
+release_and_exit:
-release:
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+ /* Release the temporal table descriptor */
+
+ acpi_tb_release_temporal_table(&new_table_desc);
return_ACPI_STATUS(status);
}
*
* FUNCTION: acpi_tb_override_table
*
- * PARAMETERS: table_header - Header for the original table
- * table_desc - Table descriptor initialized for the
- * original table. May or may not be mapped.
+ * PARAMETERS: old_table_desc - Validated table descriptor to be
+ * overridden
*
- * RETURN: Pointer to the entire new table. NULL if table not overridden.
- * If overridden, installs the new table within the input table
- * descriptor.
+ * RETURN: None
*
* DESCRIPTION: Attempt table override by calling the OSL override functions.
* Note: If the table is overridden, then the entire new table
* is acquired and returned by this function.
- * After invocation, the table descriptor is in a state that is
- * "INSTALLED" but not "VALIDATED", thus the "Pointer" member is
- * kept NULL.
+ * Before/after invocation, the table descriptor is in a state
+ * that is "VALIDATED".
*
******************************************************************************/
-struct acpi_table_header *acpi_tb_override_table(struct acpi_table_header
- *table_header,
- struct acpi_table_desc
- *table_desc)
+void acpi_tb_override_table(struct acpi_table_desc *old_table_desc)
{
acpi_status status;
- struct acpi_table_header *new_table;
- u32 new_table_length;
- u8 new_flags;
char *override_type;
struct acpi_table_desc new_table_desc;
-
- ACPI_MEMSET(&new_table_desc, 0, sizeof(struct acpi_table_desc));
+ struct acpi_table_header *table;
+ acpi_physical_address address;
+ u32 length;
/* (1) Attempt logical override (returns a logical address) */
- status = acpi_os_table_override(table_header, &new_table_desc.pointer);
- if (ACPI_SUCCESS(status) && new_table_desc.pointer) {
- new_table_desc.address =
- ACPI_PTR_TO_PHYSADDR(new_table_desc.pointer);
- new_table_desc.length = new_table_desc.pointer->length;
- new_table_desc.flags = ACPI_TABLE_ORIGIN_OVERRIDE;
+ status = acpi_os_table_override(old_table_desc->pointer, &table);
+ if (ACPI_SUCCESS(status) && table) {
+ acpi_tb_acquire_temporal_table(&new_table_desc,
+ ACPI_PTR_TO_PHYSADDR(table),
+ ACPI_TABLE_ORIGIN_OVERRIDE);
override_type = "Logical";
goto finish_override;
}
/* (2) Attempt physical override (returns a physical address) */
- status = acpi_os_physical_table_override(table_header,
- &new_table_desc.address,
- &new_table_desc.length);
- if (ACPI_SUCCESS(status) && new_table_desc.address
- && new_table_desc.length) {
+ status = acpi_os_physical_table_override(old_table_desc->pointer,
+ &address, &length);
+ if (ACPI_SUCCESS(status) && address && length) {
+ acpi_tb_acquire_temporal_table(&new_table_desc, address,
+ ACPI_TABLE_ORIGIN_MAPPED);
override_type = "Physical";
- new_table_desc.flags = ACPI_TABLE_ORIGIN_MAPPED;
goto finish_override;
}
- return (NULL); /* There was no override */
+ return; /* There was no override */
finish_override:
- /*
- * Acquire the entire new table to indicate overridden.
- * Note that this is required by the callers of this function.
- */
- status = acpi_tb_acquire_table(&new_table_desc, &new_table,
- &new_table_length, &new_flags);
+ /* Validate and verify a table before overriding */
+
+ status = acpi_tb_verify_table(&new_table_desc, NULL);
if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
- "%4.4s " ACPI_PRINTF_UINT
- " Attempted table override failed",
- table_header->signature,
- ACPI_FORMAT_TO_UINT(table_desc->address)));
- return (NULL);
+ return;
}
ACPI_INFO((AE_INFO, "%4.4s " ACPI_PRINTF_UINT
" %s table override, new table: " ACPI_PRINTF_UINT,
- table_header->signature,
- ACPI_FORMAT_TO_UINT(table_desc->address),
+ old_table_desc->signature.ascii,
+ ACPI_FORMAT_TO_UINT(old_table_desc->address),
override_type, ACPI_FORMAT_TO_UINT(new_table_desc.address)));
- /* We can now uninstall the original table (if fully mapped) */
+ /* We can now uninstall the original table */
- acpi_tb_uninstall_table(table_desc);
+ acpi_tb_uninstall_table(old_table_desc);
- /* Install the new table */
+ /*
+ * Replace the original table descriptor and keep its state as
+ * "VALIDATED".
+ */
+ acpi_tb_install_table(old_table_desc, new_table_desc.address,
+ new_table_desc.flags, new_table_desc.pointer);
+ acpi_tb_validate_table(old_table_desc);
- table_desc->address = new_table_desc.address;
- table_desc->length = new_table_desc.length;
- table_desc->flags = new_table_desc.flags;
+ /* Release the temporal table descriptor */
- return (new_table);
+ acpi_tb_release_temporal_table(&new_table_desc);
}
/*******************************************************************************
/*******************************************************************************
*
- * FUNCTION: acpi_tb_store_table
+ * FUNCTION: acpi_tb_acquire_root_table_entry
*
- * PARAMETERS: address - Table address
- * table - Table header
- * length - Table length
- * flags - flags
+ * PARAMETERS: table_index - Where table index is returned
*
* RETURN: Status and table index.
*
- * DESCRIPTION: Add an ACPI table to the global table list
+ * DESCRIPTION: Allocate a new ACPI table entry to the global table list
*
******************************************************************************/
-acpi_status
-acpi_tb_store_table(acpi_physical_address address,
- struct acpi_table_header *table,
- u32 length, u8 flags, u32 *table_index)
+static acpi_status acpi_tb_acquire_root_table_entry(u32 *table_index)
{
acpi_status status;
- struct acpi_table_desc *new_table;
/* Ensure that there is room for the table in the Root Table List */
}
}
- new_table =
- &acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
- current_table_count];
+ *table_index = acpi_gbl_root_table_list.current_table_count;
+ acpi_gbl_root_table_list.current_table_count++;
+ return (AE_OK);
+}
- /* Initialize added table */
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_store_table
+ *
+ * PARAMETERS: address - Table address
+ * table - Table header
+ * length - Table length
+ * flags - flags
+ *
+ * RETURN: Status and table index.
+ *
+ * DESCRIPTION: Add an ACPI table to the global table list
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_store_table(acpi_physical_address address,
+ struct acpi_table_header * table,
+ u32 length, u8 flags, u32 *table_index)
+{
+ acpi_status status;
+ struct acpi_table_desc *table_desc;
+
+ status = acpi_tb_acquire_root_table_entry(table_index);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
- new_table->address = address;
- new_table->pointer = table;
- new_table->length = length;
- new_table->owner_id = 0;
- new_table->flags = flags;
+ /* Initialize added table */
- ACPI_MOVE_32_TO_32(&new_table->signature, table->signature);
+ table_desc = &acpi_gbl_root_table_list.tables[*table_index];
+ acpi_tb_install_table(table_desc, address, flags, table);
+ table_desc->pointer = table;
- *table_index = acpi_gbl_root_table_list.current_table_count;
- acpi_gbl_root_table_list.current_table_count++;
return (AE_OK);
}
ACPI_MEMCPY(new_table, table_desc->pointer, table_desc->length);
acpi_tb_uninstall_table(table_desc);
- table_desc->address = ACPI_PTR_TO_PHYSADDR(new_table);
- table_desc->pointer = new_table;
- table_desc->flags = ACPI_TABLE_ORIGIN_ALLOCATED;
+ acpi_tb_install_table(&acpi_gbl_root_table_list.
+ tables[ACPI_TABLE_INDEX_DSDT],
+ ACPI_PTR_TO_PHYSADDR(new_table),
+ ACPI_TABLE_ORIGIN_ALLOCATED, new_table);
ACPI_INFO((AE_INFO,
"Forced DSDT copy: length 0x%05X copied locally, original unmapped",
return (new_table);
}
-/*******************************************************************************
- *
- * FUNCTION: acpi_tb_install_table
- *
- * PARAMETERS: address - Physical address of DSDT or FACS
- * signature - Table signature, NULL if no need to
- * match
- * table_index - Index into root table array
- *
- * RETURN: None
- *
- * DESCRIPTION: Install an ACPI table into the global data structure. The
- * table override mechanism is called to allow the host
- * OS to replace any table before it is installed in the root
- * table array.
- *
- ******************************************************************************/
-
-void
-acpi_tb_install_table(acpi_physical_address address,
- char *signature, u32 table_index)
-{
- struct acpi_table_header *table;
- struct acpi_table_header *final_table;
- struct acpi_table_desc *table_desc;
-
- if (!address) {
- ACPI_ERROR((AE_INFO,
- "Null physical address for ACPI table [%s]",
- signature));
- return;
- }
-
- /* Map just the table header */
-
- table = acpi_os_map_memory(address, sizeof(struct acpi_table_header));
- if (!table) {
- ACPI_ERROR((AE_INFO,
- "Could not map memory for table [%s] at %p",
- signature, ACPI_CAST_PTR(void, address)));
- return;
- }
-
- /* If a particular signature is expected (DSDT/FACS), it must match */
-
- if (signature && !ACPI_COMPARE_NAME(table->signature, signature)) {
- ACPI_BIOS_ERROR((AE_INFO,
- "Invalid signature 0x%X for ACPI table, expected [%s]",
- *ACPI_CAST_PTR(u32, table->signature),
- signature));
- goto unmap_and_exit;
- }
-
- /*
- * Initialize the table entry. Set the pointer to NULL, since the
- * table is not fully mapped at this time.
- */
- table_desc = &acpi_gbl_root_table_list.tables[table_index];
-
- table_desc->address = address;
- table_desc->pointer = NULL;
- table_desc->length = table->length;
- table_desc->flags = ACPI_TABLE_ORIGIN_MAPPED;
- ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
-
- /*
- * ACPI Table Override:
- *
- * Before we install the table, let the host OS override it with a new
- * one if desired. Any table within the RSDT/XSDT can be replaced,
- * including the DSDT which is pointed to by the FADT.
- *
- * NOTE: If the table is overridden, then final_table will contain a
- * mapped pointer to the full new table. If the table is not overridden,
- * or if there has been a physical override, then the table will be
- * fully mapped later (in verify table). In any case, we must
- * unmap the header that was mapped above.
- */
- final_table = acpi_tb_override_table(table, table_desc);
- if (!final_table) {
- final_table = table; /* There was no override */
- }
-
- acpi_tb_print_table_header(table_desc->address, final_table);
-
- /* Set the global integer width (based upon revision of the DSDT) */
-
- if (table_index == ACPI_TABLE_INDEX_DSDT) {
- acpi_ut_set_integer_width(final_table->revision);
- }
-
- /*
- * If we have a physical override during this early loading of the ACPI
- * tables, unmap the table for now. It will be mapped again later when
- * it is actually used. This supports very early loading of ACPI tables,
- * before virtual memory is fully initialized and running within the
- * host OS. Note: A logical override has the ACPI_TABLE_ORIGIN_OVERRIDE
- * flag set and will not be deleted below.
- */
- if (final_table != table) {
- /*
- * Table is in "INSTALLED" state, the final_table pointer is not
- * maintained in the root table list.
- */
- acpi_tb_release_table(final_table, table_desc->length,
- table_desc->flags);
- }
-
-unmap_and_exit:
-
- /* Always unmap the table header that we mapped above */
-
- acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
-}
-
/*******************************************************************************
*
* FUNCTION: acpi_tb_get_root_table_entry
u32 length;
u8 *table_entry;
acpi_status status;
+ u32 table_index;
ACPI_FUNCTION_TRACE(tb_parse_root_table);
/* Initialize the root table array from the RSDT/XSDT */
for (i = 0; i < table_count; i++) {
- if (acpi_gbl_root_table_list.current_table_count >=
- acpi_gbl_root_table_list.max_table_count) {
-
- /* There is no more room in the root table array, attempt resize */
-
- status = acpi_tb_resize_root_table_list();
- if (ACPI_FAILURE(status)) {
- ACPI_WARNING((AE_INFO,
- "Truncating %u table entries!",
- (unsigned)(table_count -
- (acpi_gbl_root_table_list.
- current_table_count -
- 2))));
- break;
- }
- }
/* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */
- acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
- current_table_count].address =
- acpi_tb_get_root_table_entry(table_entry, table_entry_size);
+ status =
+ acpi_tb_install_non_fixed_table(acpi_tb_get_root_table_entry
+ (table_entry,
+ table_entry_size),
+ ACPI_TABLE_ORIGIN_MAPPED,
+ FALSE, &table_index);
+
+ if (ACPI_SUCCESS(status) &&
+ ACPI_COMPARE_NAME(&acpi_gbl_root_table_list.
+ tables[table_index].signature,
+ ACPI_SIG_FADT)) {
+ acpi_tb_parse_fadt(table_index);
+ }
table_entry += table_entry_size;
- acpi_gbl_root_table_list.current_table_count++;
}
/*
*/
acpi_os_unmap_memory(table, length);
- /*
- * Complete the initialization of the root table array by examining
- * the header of each table
- */
- for (i = 2; i < acpi_gbl_root_table_list.current_table_count; i++) {
- acpi_tb_install_table(acpi_gbl_root_table_list.tables[i].
- address, NULL, i);
-
- /* Special case for FADT - validate it then get the DSDT and FACS */
-
- if (ACPI_COMPARE_NAME
- (&acpi_gbl_root_table_list.tables[i].signature,
- ACPI_SIG_FADT)) {
- acpi_tb_parse_fadt(i);
- }
- }
-
return_ACPI_STATUS(AE_OK);
}
projects / firefly-linux-kernel-4.4.55.git / commitdiff