Provide a function to gain ACPI table access.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41429 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/drivers/ACPI.h

@@ -234,7 +234,7 @@ struct acpi_module_info {
 	status_t	(*evaluate_method)(acpi_handle handle, const char *method,
 					acpi_objects *args, acpi_data *returnValue);
 
-	/* Resource info */
+	/* Resource Management */
 
 	status_t	(*get_irq_routing_table)(acpi_handle busDeviceHandle,
 					acpi_data *retBuffer);
@@ -251,6 +251,10 @@ struct acpi_module_info {
 					size_t size);
 	status_t	(*enter_sleep_state)(uint8 state);
 	status_t	(*reboot)(void);
+
+	/* Table Access */
+	status_t	(*get_table)(char *signature, uint32 instance,
+					void **tableHeader);
 };
 
 

src/add-ons/kernel/bus_managers/acpi/acpi_busman.c

@@ -713,6 +713,14 @@ reboot(void)
 }
 
 
+status_t
+get_table(char* signature, uint32 instance, void** tableHeader)
+{
+	return AcpiGetTable(signature, instance, (ACPI_TABLE_HEADER**)tableHeader)
+		== AE_OK ? B_OK : B_ERROR;
+}
+
+
 struct acpi_module_info gACPIModule = {
 	{
 		B_ACPI_MODULE_NAME,
@@ -752,5 +760,6 @@ struct acpi_module_info gACPIModule = {
 	set_current_resources,
 	prepare_sleep_state,
 	enter_sleep_state,
-	reboot
+	reboot,
+	get_table
 };

src/add-ons/kernel/bus_managers/acpi/acpi_module.c

@@ -219,7 +219,8 @@ static struct acpi_root_info sACPIRootModule = {
 	set_current_resources,
 	prepare_sleep_state,
 	enter_sleep_state,
-	reboot
+	reboot,
+	get_table
 };
 
 

src/add-ons/kernel/bus_managers/acpi/acpi_priv.h

@@ -134,6 +134,10 @@ typedef struct acpi_root_info {
 					size_t size);
 	status_t	(*enter_sleep_state)(uint8 state);
 	status_t	(*reboot)(void);
+
+	/* Table Access */
+	status_t	(*get_table)(char *signature, uint32 instance,
+					void **tableHeader);
 } acpi_root_info;
 
 
@@ -211,6 +215,8 @@ status_t enter_sleep_state(uint8 state);
 
 status_t reboot(void);
 
+status_t get_table(char* signature, uint32 instance, void** tableHeader);
+
 __END_DECLS