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-rw-r--r--drivers/acpi/executer/exconfig.c29
-rw-r--r--drivers/acpi/tables/tbxface.c89
-rw-r--r--drivers/acpi/utilities/utglobal.c3
3 files changed, 119 insertions, 2 deletions
diff --git a/drivers/acpi/executer/exconfig.c b/drivers/acpi/executer/exconfig.c
index 25802f302ff..009aef5fcbf 100644
--- a/drivers/acpi/executer/exconfig.c
+++ b/drivers/acpi/executer/exconfig.c
@@ -234,6 +234,13 @@ acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
table->oem_table_id));
}
+ /* 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);
+ }
+
*return_desc = ddb_handle;
return_ACPI_STATUS(status);
}
@@ -352,6 +359,14 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
return_ACPI_STATUS(status);
}
+ /* Invoke table handler if present */
+
+ if (acpi_gbl_table_handler) {
+ (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD,
+ table_desc.pointer,
+ acpi_gbl_table_handler_context);
+ }
+
cleanup:
if (ACPI_FAILURE(status)) {
acpi_tb_delete_table(&table_desc);
@@ -376,6 +391,7 @@ acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
acpi_status status = AE_OK;
union acpi_operand_object *table_desc = ddb_handle;
acpi_native_uint table_index;
+ struct acpi_table_header *table;
ACPI_FUNCTION_TRACE(ex_unload_table);
@@ -395,6 +411,17 @@ acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
table_index = (acpi_native_uint) table_desc->reference.object;
+ /* Invoke table handler if present */
+
+ if (acpi_gbl_table_handler) {
+ status = acpi_get_table_by_index(table_index, &table);
+ if (ACPI_SUCCESS(status)) {
+ (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,
+ table,
+ acpi_gbl_table_handler_context);
+ }
+ }
+
/*
* Delete the entire namespace under this table Node
* (Offset contains the table_id)
@@ -407,5 +434,5 @@ acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
/* Delete the table descriptor (ddb_handle) */
acpi_ut_remove_reference(table_desc);
- return_ACPI_STATUS(status);
+ return_ACPI_STATUS(AE_OK);
}
diff --git a/drivers/acpi/tables/tbxface.c b/drivers/acpi/tables/tbxface.c
index a9e3331fee5..5f2271542a9 100644
--- a/drivers/acpi/tables/tbxface.c
+++ b/drivers/acpi/tables/tbxface.c
@@ -635,6 +635,95 @@ acpi_status acpi_load_tables(void)
ACPI_EXPORT_SYMBOL(acpi_load_tables)
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_table_handler
+ *
+ * PARAMETERS: Handler - Table event handler
+ * Context - Value passed to the handler on each event
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Install table event handler
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_table_handler(acpi_tbl_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 table event handler
+ *
+ ******************************************************************************/
+acpi_status acpi_remove_table_handler(acpi_tbl_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)
+
+
static int __init acpi_no_auto_ssdt_setup(char *s) {
printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n");
diff --git a/drivers/acpi/utilities/utglobal.c b/drivers/acpi/utilities/utglobal.c
index 630c9a2c5b7..44425433075 100644
--- a/drivers/acpi/utilities/utglobal.c
+++ b/drivers/acpi/utilities/utglobal.c
@@ -675,12 +675,13 @@ void acpi_ut_init_globals(void)
acpi_gbl_gpe_fadt_blocks[0] = NULL;
acpi_gbl_gpe_fadt_blocks[1] = NULL;
- /* Global notify handlers */
+ /* Global handlers */
acpi_gbl_system_notify.handler = NULL;
acpi_gbl_device_notify.handler = NULL;
acpi_gbl_exception_handler = NULL;
acpi_gbl_init_handler = NULL;
+ acpi_gbl_table_handler = NULL;
/* Global Lock support */