ACPICA: Support for custom ACPICA build for ACPI 5 reduced hardware

Add ACPI_REDUCED_HARDWARE flag that removes all hardware-related
code (about 10% code, 5% static data).

Signed-off-by: Bob Moore <[e-mail]>
Signed-off-by: Lin Ming <[e-mail]>
Signed-off-by: Len Brown <[e-mail]>

drivers/acpi/acpica/accommon.h

···
  *
  * Note: The order of these include files is important.
  */
-#include "acconfig.h"		/* Global configuration constants */
 #include "acmacros.h"		/* C macros */
 #include "aclocal.h"		/* Internal data types */
 #include "acobject.h"		/* ACPI internal object */

drivers/acpi/acpica/acconfig.h include/acpi/acconfig.h

···
  */
 #define ACPI_CHECKSUM_ABORT             FALSE
 
+/*
+ * Generate a version of ACPICA that only supports "reduced hardware"
+ * platforms (as defined in ACPI 5.0). Set to TRUE to generate a specialized
+ * version of ACPICA that ONLY supports the ACPI 5.0 "reduced hardware"
+ * model. In other words, no ACPI hardware is supported.
+ *
+ * If TRUE, this means no support for the following:
+ *      PM Event and Control registers
+ *      SCI interrupt (and handler)
+ *      Fixed Events
+ *      General Purpose Events (GPEs)
+ *      Global Lock
+ *      ACPI PM timer
+ *      FACS table (Waking vectors and Global Lock)
+ */
+#define ACPI_REDUCED_HARDWARE           FALSE
+
 /******************************************************************************
  *
  * Subsystem Constants

drivers/acpi/acpica/acdebug.h

···
 
 void acpi_db_set_scope(char *name);
 
-acpi_status acpi_db_sleep(char *object_arg);
+ACPI_HW_DEPENDENT_RETURN_OK(acpi_status acpi_db_sleep(char *object_arg))
 
 void acpi_db_find_references(char *object_arg);
 
···
 
 void acpi_db_display_resources(char *object_arg);
 
-void acpi_db_display_gpes(void);
+ACPI_HW_DEPENDENT_RETURN_VOID(void acpi_db_display_gpes(void))
 
 void acpi_db_check_integrity(void);
 
-void acpi_db_generate_gpe(char *gpe_arg, char *block_arg);
+ACPI_HW_DEPENDENT_RETURN_VOID(void
+			      acpi_db_generate_gpe(char *gpe_arg,
+						   char *block_arg))
 
 void acpi_db_check_predefined_names(void);
 

drivers/acpi/acpica/acevents.h

···
  */
 acpi_status acpi_ev_init_global_lock_handler(void);
 
-acpi_status acpi_ev_acquire_global_lock(u16 timeout);
-
-acpi_status acpi_ev_release_global_lock(void);
-
-acpi_status acpi_ev_remove_global_lock_handler(void);
+ACPI_HW_DEPENDENT_RETURN_OK(acpi_status
+			    acpi_ev_acquire_global_lock(u16 timeout))
+ ACPI_HW_DEPENDENT_RETURN_OK(acpi_status acpi_ev_release_global_lock(void))
+ acpi_status acpi_ev_remove_global_lock_handler(void);
 
 /*
  * evgpe - Low-level GPE support
···
 			     struct acpi_gpe_block_info *gpe_block,
 			     void *context);
 
-acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block);
+ACPI_HW_DEPENDENT_RETURN_OK(acpi_status
+			    acpi_ev_delete_gpe_block(struct acpi_gpe_block_info
+						     *gpe_block))
 
 u32
 acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device,
···
  */
 acpi_status acpi_ev_gpe_initialize(void);
 
-void acpi_ev_update_gpes(acpi_owner_id table_owner_id);
+ACPI_HW_DEPENDENT_RETURN_VOID(void
+			      acpi_ev_update_gpes(acpi_owner_id table_owner_id))
 
-acpi_status
+ acpi_status
 acpi_ev_match_gpe_method(acpi_handle obj_handle,
 			 u32 level, void *context, void **return_value);
 
···
 
 u32 acpi_ev_initialize_sCI(u32 program_sCI);
 
-void acpi_ev_terminate(void);
-
+ACPI_HW_DEPENDENT_RETURN_VOID(void acpi_ev_terminate(void))
 #endif				/* __ACEVENTS_H__  */

drivers/acpi/acpica/acglobal.h

···
  */
 u8 acpi_gbl_reduced_hardware;
 
-#endif
+#endif				/* DEFINE_ACPI_GLOBALS */
 
 /* Do not disassemble buffers to resource descriptors */
 
···
  * found in the RSDT/XSDT.
  */
 ACPI_EXTERN struct acpi_table_list acpi_gbl_root_table_list;
+
+#if (!ACPI_REDUCED_HARDWARE)
 ACPI_EXTERN struct acpi_table_facs *acpi_gbl_FACS;
+
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 /* These addresses are calculated from the FADT Event Block addresses */
 
···
 ACPI_EXTERN struct acpi_gpe_xrupt_info *acpi_gbl_gpe_xrupt_list_head;
 ACPI_EXTERN struct acpi_gpe_block_info
 *acpi_gbl_gpe_fadt_blocks[ACPI_MAX_GPE_BLOCKS];
+
+#if (!ACPI_REDUCED_HARDWARE)
+
 ACPI_EXTERN u8 acpi_gbl_all_gpes_initialized;
 ACPI_EXTERN ACPI_GBL_EVENT_HANDLER acpi_gbl_global_event_handler;
 ACPI_EXTERN void *acpi_gbl_global_event_handler_context;
+
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 /*****************************************************************************
  *

drivers/acpi/acpica/evevent.c

···
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evevent")
-
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /* Local prototypes */
 static acpi_status acpi_ev_fixed_event_initialize(void);
 
···
 	return ((acpi_gbl_fixed_event_handlers[event].
 		 handler) (acpi_gbl_fixed_event_handlers[event].context));
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/evglock.c

···
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evglock")
-
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /* Local prototypes */
 static u32 acpi_ev_global_lock_handler(void *context);
 
···
 	acpi_os_release_mutex(acpi_gbl_global_lock_mutex->mutex.os_mutex);
 	return_ACPI_STATUS(status);
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/evgpe.c

···
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evgpe")
-
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /* Local prototypes */
 static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context);
 
···
 
 	return_UINT32(ACPI_INTERRUPT_HANDLED);
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/evgpeblk.c

···
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evgpeblk")
-
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /* Local prototypes */
 static acpi_status
 acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block,
···
 
 	return_ACPI_STATUS(AE_OK);
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/evgpeinit.c

···
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evgpeinit")
-
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /*
  * Note: History of _PRW support in ACPICA
  *
···
 			  name, gpe_number));
 	return_ACPI_STATUS(AE_OK);
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/evgpeutil.c

···
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evgpeutil")
 
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /*******************************************************************************
  *
  * FUNCTION:    acpi_ev_walk_gpe_list
···
 
 	return_ACPI_STATUS(AE_OK);
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/evmisc.c

···
 	acpi_ut_delete_generic_state(notify_info);
 }
 
+#if (!ACPI_REDUCED_HARDWARE)
 /******************************************************************************
  *
  * FUNCTION:    acpi_ev_terminate
···
 	}
 	return_VOID;
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/evsci.c

···
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evsci")
-
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /* Local prototypes */
 static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context);
 
···
 
 	return_ACPI_STATUS(status);
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/evxface.c

···
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evxface")
 
-/*******************************************************************************
- *
- * FUNCTION:    acpi_install_exception_handler
- *
- * PARAMETERS:  Handler         - Pointer to the handler function for the
- *                                event
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Saves the pointer to the handler function
- *
- ******************************************************************************/
-#ifdef ACPI_FUTURE_USAGE
-acpi_status acpi_install_exception_handler(acpi_exception_handler handler)
-{
-	acpi_status status;
-
-	ACPI_FUNCTION_TRACE(acpi_install_exception_handler);
-
-	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
-	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
-	}
-
-	/* Don't allow two handlers. */
-
-	if (acpi_gbl_exception_handler) {
-		status = AE_ALREADY_EXISTS;
-		goto cleanup;
-	}
-
-	/* Install the handler */
-
-	acpi_gbl_exception_handler = handler;
-
-      cleanup:
-	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-	return_ACPI_STATUS(status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_install_exception_handler)
-#endif				/*  ACPI_FUTURE_USAGE  */
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_install_global_event_handler
- *
- * PARAMETERS:  Handler         - Pointer to the global event handler function
- *              Context         - Value passed to the handler on each event
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Saves the pointer to the handler function. The global handler
- *              is invoked upon each incoming GPE and Fixed Event. It is
- *              invoked at interrupt level at the time of the event dispatch.
- *              Can be used to update event counters, etc.
- *
- ******************************************************************************/
-acpi_status
-acpi_install_global_event_handler(ACPI_GBL_EVENT_HANDLER handler, void *context)
-{
-	acpi_status status;
-
-	ACPI_FUNCTION_TRACE(acpi_install_global_event_handler);
-
-	/* Parameter validation */
-
-	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 two handlers. */
-
-	if (acpi_gbl_global_event_handler) {
-		status = AE_ALREADY_EXISTS;
-		goto cleanup;
-	}
-
-	acpi_gbl_global_event_handler = handler;
-	acpi_gbl_global_event_handler_context = context;
-
-      cleanup:
-	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-	return_ACPI_STATUS(status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_install_global_event_handler)
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_install_fixed_event_handler
- *
- * PARAMETERS:  Event           - Event type to enable.
- *              Handler         - Pointer to the handler function for the
- *                                event
- *              Context         - Value passed to the handler on each GPE
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Saves the pointer to the handler function and then enables the
- *              event.
- *
- ******************************************************************************/
-acpi_status
-acpi_install_fixed_event_handler(u32 event,
-				 acpi_event_handler handler, void *context)
-{
-	acpi_status status;
-
-	ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler);
-
-	/* Parameter validation */
-
-	if (event > ACPI_EVENT_MAX) {
-		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 two handlers. */
-
-	if (NULL != acpi_gbl_fixed_event_handlers[event].handler) {
-		status = AE_ALREADY_EXISTS;
-		goto cleanup;
-	}
-
-	/* Install the handler before enabling the event */
-
-	acpi_gbl_fixed_event_handlers[event].handler = handler;
-	acpi_gbl_fixed_event_handlers[event].context = context;
-
-	status = acpi_clear_event(event);
-	if (ACPI_SUCCESS(status))
-		status = acpi_enable_event(event, 0);
-	if (ACPI_FAILURE(status)) {
-		ACPI_WARNING((AE_INFO, "Could not enable fixed event 0x%X",
-			      event));
-
-		/* Remove the handler */
-
-		acpi_gbl_fixed_event_handlers[event].handler = NULL;
-		acpi_gbl_fixed_event_handlers[event].context = NULL;
-	} else {
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-				  "Enabled fixed event %X, Handler=%p\n", event,
-				  handler));
-	}
-
-      cleanup:
-	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-	return_ACPI_STATUS(status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler)
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_remove_fixed_event_handler
- *
- * PARAMETERS:  Event           - Event type to disable.
- *              Handler         - Address of the handler
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Disables the event and unregisters the event handler.
- *
- ******************************************************************************/
-acpi_status
-acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler)
-{
-	acpi_status status = AE_OK;
-
-	ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler);
-
-	/* Parameter validation */
-
-	if (event > ACPI_EVENT_MAX) {
-		return_ACPI_STATUS(AE_BAD_PARAMETER);
-	}
-
-	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
-	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
-	}
-
-	/* Disable the event before removing the handler */
-
-	status = acpi_disable_event(event, 0);
-
-	/* Always Remove the handler */
-
-	acpi_gbl_fixed_event_handlers[event].handler = NULL;
-	acpi_gbl_fixed_event_handlers[event].context = NULL;
-
-	if (ACPI_FAILURE(status)) {
-		ACPI_WARNING((AE_INFO,
-			      "Could not write to fixed event enable register 0x%X",
-			      event));
-	} else {
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Disabled fixed event %X\n",
-				  event));
-	}
-
-	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-	return_ACPI_STATUS(status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler)
 
 /*******************************************************************************
  *
···
 
 	return AE_OK;
 }
+
 
 /*******************************************************************************
  *
···
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_install_exception_handler
+ *
+ * PARAMETERS:  Handler         - Pointer to the handler function for the
+ *                                event
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function
+ *
+ ******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
+acpi_status acpi_install_exception_handler(acpi_exception_handler handler)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_exception_handler);
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Don't allow two handlers. */
+
+	if (acpi_gbl_exception_handler) {
+		status = AE_ALREADY_EXISTS;
+		goto cleanup;
+	}
+
+	/* Install the handler */
+
+	acpi_gbl_exception_handler = handler;
+
+      cleanup:
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_exception_handler)
+#endif				/*  ACPI_FUTURE_USAGE  */
+
+#if (!ACPI_REDUCED_HARDWARE)
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_global_event_handler
+ *
+ * PARAMETERS:  Handler         - Pointer to the global event handler function
+ *              Context         - Value passed to the handler on each event
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function. The global handler
+ *              is invoked upon each incoming GPE and Fixed Event. It is
+ *              invoked at interrupt level at the time of the event dispatch.
+ *              Can be used to update event counters, etc.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_global_event_handler(ACPI_GBL_EVENT_HANDLER handler, void *context)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_global_event_handler);
+
+	/* Parameter validation */
+
+	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 two handlers. */
+
+	if (acpi_gbl_global_event_handler) {
+		status = AE_ALREADY_EXISTS;
+		goto cleanup;
+	}
+
+	acpi_gbl_global_event_handler = handler;
+	acpi_gbl_global_event_handler_context = context;
+
+      cleanup:
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_global_event_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_fixed_event_handler
+ *
+ * PARAMETERS:  Event           - Event type to enable.
+ *              Handler         - Pointer to the handler function for the
+ *                                event
+ *              Context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function and then enables the
+ *              event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_fixed_event_handler(u32 event,
+				 acpi_event_handler handler, void *context)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler);
+
+	/* Parameter validation */
+
+	if (event > ACPI_EVENT_MAX) {
+		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 two handlers. */
+
+	if (NULL != acpi_gbl_fixed_event_handlers[event].handler) {
+		status = AE_ALREADY_EXISTS;
+		goto cleanup;
+	}
+
+	/* Install the handler before enabling the event */
+
+	acpi_gbl_fixed_event_handlers[event].handler = handler;
+	acpi_gbl_fixed_event_handlers[event].context = context;
+
+	status = acpi_clear_event(event);
+	if (ACPI_SUCCESS(status))
+		status = acpi_enable_event(event, 0);
+	if (ACPI_FAILURE(status)) {
+		ACPI_WARNING((AE_INFO, "Could not enable fixed event 0x%X",
+			      event));
+
+		/* Remove the handler */
+
+		acpi_gbl_fixed_event_handlers[event].handler = NULL;
+		acpi_gbl_fixed_event_handlers[event].context = NULL;
+	} else {
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+				  "Enabled fixed event %X, Handler=%p\n", event,
+				  handler));
+	}
+
+      cleanup:
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_fixed_event_handler
+ *
+ * PARAMETERS:  Event           - Event type to disable.
+ *              Handler         - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disables the event and unregisters the event handler.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler);
+
+	/* Parameter validation */
+
+	if (event > ACPI_EVENT_MAX) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Disable the event before removing the handler */
+
+	status = acpi_disable_event(event, 0);
+
+	/* Always Remove the handler */
+
+	acpi_gbl_fixed_event_handlers[event].handler = NULL;
+	acpi_gbl_fixed_event_handlers[event].context = NULL;
+
+	if (ACPI_FAILURE(status)) {
+		ACPI_WARNING((AE_INFO,
+			      "Could not write to fixed event enable register 0x%X",
+			      event));
+	} else {
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Disabled fixed event %X\n",
+				  event));
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler)
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_install_gpe_handler
  *
  * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
···
 }
 
 ACPI_EXPORT_SYMBOL(acpi_release_global_lock)
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/evxfevnt.c

···
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evxfevnt")
 
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /*******************************************************************************
  *
  * FUNCTION:    acpi_enable
···
 }
 
 ACPI_EXPORT_SYMBOL(acpi_get_event_status)
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/evxfgpe.c

···
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evxfgpe")
 
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /******************************************************************************
  *
  * FUNCTION:    acpi_update_all_gpes
···
 }
 
 ACPI_EXPORT_SYMBOL(acpi_get_gpe_device)
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/hwacpi.c

···
 #define _COMPONENT          ACPI_HARDWARE
 ACPI_MODULE_NAME("hwacpi")
 
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /******************************************************************************
  *
  * FUNCTION:    acpi_hw_set_mode
···
 		return_UINT32(ACPI_SYS_MODE_LEGACY);
 	}
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/hwgpe.c

···
 
 #define _COMPONENT          ACPI_HARDWARE
 ACPI_MODULE_NAME("hwgpe")
-
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /* Local prototypes */
 static acpi_status
 acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
···
 	status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block, NULL);
 	return_ACPI_STATUS(status);
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/hwregs.c

···
 #define _COMPONENT          ACPI_HARDWARE
 ACPI_MODULE_NAME("hwregs")
 
+#if (!ACPI_REDUCED_HARDWARE)
 /* Local Prototypes */
 static acpi_status
 acpi_hw_read_multiple(u32 *value,
···
 acpi_hw_write_multiple(u32 value,
 		       struct acpi_generic_address *register_a,
 		       struct acpi_generic_address *register_b);
+
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 /******************************************************************************
  *
···
 	return (status);
 }
 
+#if (!ACPI_REDUCED_HARDWARE)
 /*******************************************************************************
  *
  * FUNCTION:    acpi_hw_clear_acpi_status
···
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_hw_get_register_bit_mask
+ * FUNCTION:    acpi_hw_get_bit_register_info
  *
  * PARAMETERS:  register_id         - Index of ACPI Register to access
  *
···
 
 	return (status);
 }
+
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/hwsleep.c

···
 	}
 }
 
+#if (!ACPI_REDUCED_HARDWARE)
 /*******************************************************************************
  *
  * FUNCTION:    acpi_hw_legacy_sleep
···
 	return_ACPI_STATUS(status);
 }
 
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 /*******************************************************************************
  *

drivers/acpi/acpica/hwtimer.c

···
 #define _COMPONENT          ACPI_HARDWARE
 ACPI_MODULE_NAME("hwtimer")
 
+#if (!ACPI_REDUCED_HARDWARE)	/* Entire module */
 /******************************************************************************
  *
  * FUNCTION:    acpi_get_timer_resolution
···
 }
 
 ACPI_EXPORT_SYMBOL(acpi_get_timer_duration)
+#endif				/* !ACPI_REDUCED_HARDWARE */

drivers/acpi/acpica/hwxface.c

···
 
 ACPI_EXPORT_SYMBOL(acpi_write)
 
+#if (!ACPI_REDUCED_HARDWARE)
 /*******************************************************************************
  *
  * FUNCTION:    acpi_read_bit_register
···
 }
 
 ACPI_EXPORT_SYMBOL(acpi_write_bit_register)
-
+#endif				/* !ACPI_REDUCED_HARDWARE */
 /*******************************************************************************
  *
  * FUNCTION:    acpi_get_sleep_type_data

drivers/acpi/acpica/hwxfsleep.c

···
 #define _COMPONENT          ACPI_HARDWARE
 ACPI_MODULE_NAME("hwxfsleep")
 
+#if (!ACPI_REDUCED_HARDWARE)
 /*******************************************************************************
  *
  * FUNCTION:    acpi_set_firmware_waking_vector
···
 }
 
 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
-
+#endif				/* !ACPI_REDUCED_HARDWARE */
 /*******************************************************************************
  *
  * FUNCTION:    acpi_enter_sleep_state_prep
···
 			    acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
 		return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
 	}
+#if (!ACPI_REDUCED_HARDWARE)
 
 	/* If Hardware Reduced flag is set, must use the extended sleep registers */
 
···
 
 		status = acpi_hw_legacy_sleep(sleep_state);
 	}
+
+#else
+	status = acpi_hw_extended_sleep(sleep_state);
+
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 	return_ACPI_STATUS(status);
 }
···
 	ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
 
 
+#if (!ACPI_REDUCED_HARDWARE)
+
 	/* If Hardware Reduced flag is set, must use the extended sleep registers */
 
 	if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
···
 
 		status = acpi_hw_legacy_wake_prep(sleep_state);
 	}
+#else
+	status = acpi_hw_extended_wake_prep(sleep_state);
+
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 
 	return_ACPI_STATUS(status);
···
 	ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
 
 
+#if (!ACPI_REDUCED_HARDWARE)
+
 	/* If Hardware Reduced flag is set, must use the extended sleep registers */
 
 	if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
···
 
 		status = acpi_hw_legacy_wake(sleep_state);
 	}
+
+#else
+	status = acpi_hw_extended_wake(sleep_state);
+
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 	return_ACPI_STATUS(status);
 }

drivers/acpi/acpica/tbutils.c

···
 		return AE_OK;
 }
 
+#if (!ACPI_REDUCED_HARDWARE)
 /*******************************************************************************
  *
  * FUNCTION:    acpi_tb_initialize_facs
···
 								&acpi_gbl_FACS));
 	return status;
 }
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 /*******************************************************************************
  *

drivers/acpi/acpica/utglobal.c

···
 	{NULL, ACPI_TYPE_ANY, NULL}
 };
 
+#if (!ACPI_REDUCED_HARDWARE)
 /******************************************************************************
  *
  * Event and Hardware globals
···
 					ACPI_BITMASK_RT_CLOCK_STATUS,
 					ACPI_BITMASK_RT_CLOCK_ENABLE},
 };
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 /*******************************************************************************
  *
···
 
 	acpi_gbl_owner_id_mask[ACPI_NUM_OWNERID_MASKS - 1] = 0x80000000;
 
+#if (!ACPI_REDUCED_HARDWARE)
+
 	/* GPE support */
 
 	acpi_gbl_gpe_xrupt_list_head = NULL;
···
 	acpi_gbl_gpe_fadt_blocks[1] = NULL;
 	acpi_current_gpe_count = 0;
 	acpi_gbl_all_gpes_initialized = FALSE;
+
+	acpi_gbl_global_event_handler = NULL;
+
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 	/* Global handlers */
 
···
 	acpi_gbl_init_handler = NULL;
 	acpi_gbl_table_handler = NULL;
 	acpi_gbl_interface_handler = NULL;
-	acpi_gbl_global_event_handler = NULL;
 
 	/* Global Lock support */
 

drivers/acpi/acpica/utinit.c

···
 /* Local prototypes */
 static void acpi_ut_terminate(void);
 
+#if (!ACPI_REDUCED_HARDWARE)
+
+static void acpi_ut_free_gpe_lists(void);
+
+#else
+
+#define acpi_ut_free_gpe_lists()
+#endif				/* !ACPI_REDUCED_HARDWARE */
+
+#if (!ACPI_REDUCED_HARDWARE)
 /******************************************************************************
  *
- * FUNCTION:    acpi_ut_terminate
+ * FUNCTION:    acpi_ut_free_gpe_lists
  *
  * PARAMETERS:  none
  *
  * RETURN:      none
  *
- * DESCRIPTION: Free global memory
+ * DESCRIPTION: Free global GPE lists
  *
  ******************************************************************************/
 
-static void acpi_ut_terminate(void)
+static void acpi_ut_free_gpe_lists(void)
 {
 	struct acpi_gpe_block_info *gpe_block;
 	struct acpi_gpe_block_info *next_gpe_block;
 	struct acpi_gpe_xrupt_info *gpe_xrupt_info;
 	struct acpi_gpe_xrupt_info *next_gpe_xrupt_info;
-
-	ACPI_FUNCTION_TRACE(ut_terminate);
 
 	/* Free global GPE blocks and related info structures */
 
···
 		ACPI_FREE(gpe_xrupt_info);
 		gpe_xrupt_info = next_gpe_xrupt_info;
 	}
+}
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_terminate
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      none
+ *
+ * DESCRIPTION: Free global memory
+ *
+ ******************************************************************************/
+
+static void acpi_ut_terminate(void)
+{
+	ACPI_FUNCTION_TRACE(ut_terminate);
+
+	acpi_ut_free_gpe_lists();
 	acpi_ut_delete_address_lists();
 	return_VOID;
 }

drivers/acpi/acpica/utxface.c

···
 
 	ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
 
+#if (!ACPI_REDUCED_HARDWARE)
+
 	/* Enable ACPI mode */
 
 	if (!(flags & ACPI_NO_ACPI_ENABLE)) {
···
 		ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
 		return_ACPI_STATUS(status);
 	}
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 	/*
 	 * Install the default op_region handlers. These are installed unless
···
 			return_ACPI_STATUS(status);
 		}
 	}
-
+#if (!ACPI_REDUCED_HARDWARE)
 	/*
 	 * Initialize ACPI Event handling (Fixed and General Purpose)
 	 *
···
 			return_ACPI_STATUS(status);
 		}
 	}
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 	return_ACPI_STATUS(status);
 }

include/acpi/acexcep.h

···
 #define AE_SAME_HANDLER                 (acpi_status) (0x0019 | AE_CODE_ENVIRONMENTAL)
 #define AE_NO_HANDLER                   (acpi_status) (0x001A | AE_CODE_ENVIRONMENTAL)
 #define AE_OWNER_ID_LIMIT               (acpi_status) (0x001B | AE_CODE_ENVIRONMENTAL)
+#define AE_NOT_CONFIGURED               (acpi_status) (0x001C | AE_CODE_ENVIRONMENTAL)
 
-#define AE_CODE_ENV_MAX                 0x001B
+#define AE_CODE_ENV_MAX                 0x001C
 
 /*
  * Programmer exceptions
···
 	"AE_ABORT_METHOD",
 	"AE_SAME_HANDLER",
 	"AE_NO_HANDLER",
-	"AE_OWNER_ID_LIMIT"
+	"AE_OWNER_ID_LIMIT",
+	"AE_NOT_CONFIGURED"
 };
 
 char const *acpi_gbl_exception_names_pgm[] = {

include/acpi/acpixf.h

···
 
 #define ACPI_CA_VERSION                 0x20120111
 
+#include "acconfig.h"
 #include "actypes.h"
 #include "actbl.h"
 
···
 extern u8 acpi_gbl_copy_dsdt_locally;
 extern u8 acpi_gbl_truncate_io_addresses;
 extern u8 acpi_gbl_disable_auto_repair;
+
+/*
+ * Hardware-reduced prototypes. All interfaces that use these macros will
+ * be configured out of the ACPICA build if the ACPI_REDUCED_HARDWARE flag
+ * is set to TRUE.
+ */
+#if (!ACPI_REDUCED_HARDWARE)
+#define ACPI_HW_DEPENDENT_RETURN_STATUS(prototype) \
+	prototype;
+
+#define ACPI_HW_DEPENDENT_RETURN_OK(prototype) \
+	prototype;
+
+#define ACPI_HW_DEPENDENT_RETURN_VOID(prototype) \
+	prototype;
+
+#else
+#define ACPI_HW_DEPENDENT_RETURN_STATUS(prototype) \
+	static ACPI_INLINE prototype {return(AE_NOT_CONFIGURED);}
+
+#define ACPI_HW_DEPENDENT_RETURN_OK(prototype) \
+	static ACPI_INLINE prototype {return(AE_OK);}
+
+#define ACPI_HW_DEPENDENT_RETURN_VOID(prototype) \
+	static ACPI_INLINE prototype {}
+
+#endif				/* !ACPI_REDUCED_HARDWARE */
 
 extern u32 acpi_current_gpe_count;
 extern struct acpi_table_fadt acpi_gbl_FADT;
···
 acpi_status acpi_subsystem_status(void);
 #endif
 
-acpi_status acpi_enable(void);
-
-acpi_status acpi_disable(void);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_enable(void))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_disable(void))
 
 #ifdef ACPI_FUTURE_USAGE
 acpi_status acpi_get_system_info(struct acpi_buffer *ret_buffer);
···
 acpi_status
 acpi_install_initialization_handler(acpi_init_handler handler, u32 function);
 
-acpi_status
-acpi_install_global_event_handler(ACPI_GBL_EVENT_HANDLER handler,
-				 void *context);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_install_global_event_handler
+				(ACPI_GBL_EVENT_HANDLER handler, void *context))
 
-acpi_status
-acpi_install_fixed_event_handler(u32 acpi_event,
-				 acpi_event_handler handler, void *context);
-
-acpi_status
-acpi_remove_fixed_event_handler(u32 acpi_event, acpi_event_handler handler);
-
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				 acpi_install_fixed_event_handler(u32
+								  acpi_event,
+								  acpi_event_handler
+								  handler,
+								  void
+								  *context))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				 acpi_remove_fixed_event_handler(u32 acpi_event,
+								 acpi_event_handler
+								 handler))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				 acpi_install_gpe_handler(acpi_handle
+							  gpe_device,
+							  u32 gpe_number,
+							  u32 type,
+							  acpi_gpe_handler
+							  address,
+							  void *context))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				 acpi_remove_gpe_handler(acpi_handle gpe_device,
+							 u32 gpe_number,
+							 acpi_gpe_handler
+							 address))
 acpi_status
 acpi_install_notify_handler(acpi_handle device,
 			    u32 handler_type,
···
 				  acpi_adr_space_type space_id,
 				  acpi_adr_space_handler handler);
 
-acpi_status
-acpi_install_gpe_handler(acpi_handle gpe_device,
-			 u32 gpe_number,
-			 u32 type, acpi_gpe_handler address, void *context);
-
-acpi_status
-acpi_remove_gpe_handler(acpi_handle gpe_device,
-			u32 gpe_number, acpi_gpe_handler address);
-
 #ifdef ACPI_FUTURE_USAGE
 acpi_status acpi_install_exception_handler(acpi_exception_handler handler);
 #endif
···
 /*
  * Global Lock interfaces
  */
-acpi_status acpi_acquire_global_lock(u16 timeout, u32 * handle);
-
-acpi_status acpi_release_global_lock(u32 handle);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_acquire_global_lock(u16 timeout,
+							 u32 *handle))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_release_global_lock(u32 handle))
 
 /*
  * Interfaces to AML mutex objects
···
 /*
  * Fixed Event interfaces
  */
-acpi_status acpi_enable_event(u32 event, u32 flags);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_enable_event(u32 event, u32 flags))
 
-acpi_status acpi_disable_event(u32 event, u32 flags);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_disable_event(u32 event, u32 flags))
 
-acpi_status acpi_clear_event(u32 event);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_clear_event(u32 event))
 
-acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status);
-
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_get_event_status(u32 event,
+						      acpi_event_status
+						      *event_status))
 /*
  * General Purpose Event (GPE) Interfaces
  */
-acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_update_all_gpes(void))
 
-acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_enable_gpe(acpi_handle gpe_device,
+						u32 gpe_number))
 
-acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_disable_gpe(acpi_handle gpe_device,
+						 u32 gpe_number))
 
-acpi_status
-acpi_setup_gpe_for_wake(acpi_handle parent_device,
-			acpi_handle gpe_device, u32 gpe_number);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_clear_gpe(acpi_handle gpe_device,
+					       u32 gpe_number))
 
-acpi_status acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_set_gpe(acpi_handle gpe_device,
+					     u32 gpe_number, u8 action))
 
-acpi_status
-acpi_get_gpe_status(acpi_handle gpe_device,
-		    u32 gpe_number, acpi_event_status *event_status);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_finish_gpe(acpi_handle gpe_device,
+						u32 gpe_number))
 
-acpi_status acpi_disable_all_gpes(void);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_setup_gpe_for_wake(acpi_handle
+							parent_device,
+							acpi_handle gpe_device,
+							u32 gpe_number))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				 acpi_set_gpe_wake_mask(acpi_handle gpe_device,
+							u32 gpe_number,
+							u8 action))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				 acpi_get_gpe_status(acpi_handle gpe_device,
+						     u32 gpe_number,
+						     acpi_event_status
+						     *event_status))
 
-acpi_status acpi_enable_all_runtime_gpes(void);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_disable_all_gpes(void))
 
-acpi_status acpi_get_gpe_device(u32 gpe_index, acpi_handle *gpe_device);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_enable_all_runtime_gpes(void))
 
-acpi_status
-acpi_install_gpe_block(acpi_handle gpe_device,
-		       struct acpi_generic_address *gpe_block_address,
-		       u32 register_count, u32 interrupt_number);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_get_gpe_device(u32 gpe_index,
+						    acpi_handle * gpe_device))
 
-acpi_status acpi_remove_gpe_block(acpi_handle gpe_device);
-
-acpi_status acpi_update_all_gpes(void);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_install_gpe_block(acpi_handle gpe_device,
+						       struct
+						       acpi_generic_address
+						       *gpe_block_address,
+						       u32 register_count,
+						       u32 interrupt_number))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				 acpi_remove_gpe_block(acpi_handle gpe_device))
 
 /*
  * Resource interfaces
···
  */
 acpi_status acpi_reset(void);
 
-acpi_status acpi_read_bit_register(u32 register_id, u32 *return_value);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_read_bit_register(u32 register_id,
+						       u32 *return_value))
 
-acpi_status acpi_write_bit_register(u32 register_id, u32 value);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_write_bit_register(u32 register_id,
+							u32 value))
 
-acpi_status acpi_set_firmware_waking_vector(u32 physical_address);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_set_firmware_waking_vector(u32
+								physical_address))
 
 #if ACPI_MACHINE_WIDTH == 64
-acpi_status acpi_set_firmware_waking_vector64(u64 physical_address);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_set_firmware_waking_vector64(u64
+								  physical_address))
 #endif
 
 acpi_status acpi_read(u64 *value, struct acpi_generic_address *reg);
 
 acpi_status acpi_write(u64 value, struct acpi_generic_address *reg);
 
+/*
+ * Sleep/Wake interfaces
+ */
 acpi_status
 acpi_get_sleep_type_data(u8 sleep_state, u8 * slp_typ_a, u8 * slp_typ_b);
 
···
 
 acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state);
 
-acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void))
 
 acpi_status acpi_leave_sleep_state_prep(u8 sleep_state);
 
···
  * ACPI Timer interfaces
  */
 #ifdef ACPI_FUTURE_USAGE
-acpi_status acpi_get_timer_resolution(u32 *resolution);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_get_timer_resolution(u32 *resolution))
 
-acpi_status acpi_get_timer(u32 *ticks);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_get_timer(u32 *ticks))
 
-acpi_status
-acpi_get_timer_duration(u32 start_ticks, u32 end_ticks, u32 *time_elapsed);
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+				acpi_get_timer_duration(u32 start_ticks,
+							u32 end_ticks,
+							u32 *time_elapsed))
 #endif				/* ACPI_FUTURE_USAGE */
 
 /*