ACPICA: Split large file, evgpeblk
authorBob Moore <robert.moore@intel.com>
Tue, 27 Apr 2010 03:41:19 +0000 (11:41 +0800)
committerLen Brown <len.brown@intel.com>
Thu, 6 May 2010 07:05:54 +0000 (03:05 -0400)
Create two new files, evgpeinit.c and evgpeutil.c. Updated
unix and linux makefiles.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
drivers/acpi/acpica/Makefile
drivers/acpi/acpica/acevents.h
drivers/acpi/acpica/evgpeblk.c
drivers/acpi/acpica/evgpeinit.c [new file with mode: 0644]
drivers/acpi/acpica/evgpeutil.c [new file with mode: 0644]

index c110209..d93cc06 100644 (file)
@@ -14,7 +14,7 @@ acpi-y := dsfield.o   dsmthdat.o  dsopcode.o  dswexec.o  dswscope.o \
 
 acpi-y += evevent.o  evregion.o  evsci.o    evxfevnt.o \
         evmisc.o   evrgnini.o  evxface.o  evxfregn.o \
-        evgpe.o    evgpeblk.o
+        evgpe.o    evgpeblk.o evgpeinit.o  evgpeutil.o
 
 acpi-y += exconfig.o  exfield.o  exnames.o   exoparg6.o  exresolv.o  exstorob.o\
         exconvrt.o  exfldio.o  exoparg1.o  exprep.o    exresop.o   exsystem.o\
index 0f83dc4..64d1e5c 100644 (file)
@@ -73,8 +73,10 @@ acpi_ev_queue_notify_request(struct acpi_namespace_node *node,
                             u32 notify_value);
 
 /*
- * evgpe - GPE handling and dispatch
+ * evgpe - Low-level GPE support
  */
+u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list);
+
 acpi_status
 acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info);
 
@@ -90,18 +92,8 @@ struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number,
                                                     *gpe_block);
 
 /*
- * evgpeblk
+ * evgpeblk - Upper-level GPE block support
  */
-u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info);
-
-acpi_status
-acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context);
-
-acpi_status
-acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
-                           struct acpi_gpe_block_info *gpe_block,
-                           void *context);
-
 acpi_status
 acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
                         struct acpi_generic_address *gpe_block_address,
@@ -110,8 +102,6 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
                         u32 interrupt_number,
                         struct acpi_gpe_block_info **return_gpe_block);
 
-void acpi_ev_update_gpes(acpi_owner_id table_owner_id);
-
 acpi_status
 acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
                             struct acpi_gpe_block_info *gpe_block);
@@ -122,10 +112,38 @@ u32
 acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info,
                     u32 gpe_number);
 
-u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list);
-
+/*
+ * evgpeinit - GPE initialization and update
+ */
 acpi_status acpi_ev_gpe_initialize(void);
 
+void acpi_ev_update_gpes(acpi_owner_id table_owner_id);
+
+acpi_status
+acpi_ev_match_gpe_method(acpi_handle obj_handle,
+                        u32 level, void *context, void **return_value);
+
+acpi_status
+acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
+                         u32 level, void *context, void **return_value);
+
+/*
+ * evgpeutil - GPE utilities
+ */
+acpi_status
+acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context);
+
+u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info);
+
+struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number);
+
+acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt);
+
+acpi_status
+acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
+                           struct acpi_gpe_block_info *gpe_block,
+                           void *context);
+
 /*
  * evregion - Address Space handling
  */
index 3341d1d..7c28f2d 100644 (file)
 #include "accommon.h"
 #include "acevents.h"
 #include "acnamesp.h"
-#include "acinterp.h"
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evgpeblk")
 
 /* Local prototypes */
 static acpi_status
-acpi_ev_match_gpe_method(acpi_handle obj_handle,
-                        u32 level, void *obj_desc, void **return_value);
-
-static acpi_status
-acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
-                         u32 level, void *info, void **return_value);
-
-static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32
-                                                              interrupt_number);
-
-static acpi_status
-acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt);
-
-static acpi_status
 acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block,
                          u32 interrupt_number);
 
@@ -74,632 +59,6 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block);
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ev_valid_gpe_event
- *
- * PARAMETERS:  gpe_event_info              - Info for this GPE
- *
- * RETURN:      TRUE if the gpe_event is valid
- *
- * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
- *              Should be called only when the GPE lists are semaphore locked
- *              and not subject to change.
- *
- ******************************************************************************/
-
-u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
-{
-       struct acpi_gpe_xrupt_info *gpe_xrupt_block;
-       struct acpi_gpe_block_info *gpe_block;
-
-       ACPI_FUNCTION_ENTRY();
-
-       /* No need for spin lock since we are not changing any list elements */
-
-       /* Walk the GPE interrupt levels */
-
-       gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
-       while (gpe_xrupt_block) {
-               gpe_block = gpe_xrupt_block->gpe_block_list_head;
-
-               /* Walk the GPE blocks on this interrupt level */
-
-               while (gpe_block) {
-                       if ((&gpe_block->event_info[0] <= gpe_event_info) &&
-                           (&gpe_block->event_info[gpe_block->gpe_count] >
-                            gpe_event_info)) {
-                               return (TRUE);
-                       }
-
-                       gpe_block = gpe_block->next;
-               }
-
-               gpe_xrupt_block = gpe_xrupt_block->next;
-       }
-
-       return (FALSE);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_walk_gpe_list
- *
- * PARAMETERS:  gpe_walk_callback   - Routine called for each GPE block
- *              Context             - Value passed to callback
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Walk the GPE lists.
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
-{
-       struct acpi_gpe_block_info *gpe_block;
-       struct acpi_gpe_xrupt_info *gpe_xrupt_info;
-       acpi_status status = AE_OK;
-       acpi_cpu_flags flags;
-
-       ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
-
-       flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
-
-       /* Walk the interrupt level descriptor list */
-
-       gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
-       while (gpe_xrupt_info) {
-
-               /* Walk all Gpe Blocks attached to this interrupt level */
-
-               gpe_block = gpe_xrupt_info->gpe_block_list_head;
-               while (gpe_block) {
-
-                       /* One callback per GPE block */
-
-                       status =
-                           gpe_walk_callback(gpe_xrupt_info, gpe_block,
-                                             context);
-                       if (ACPI_FAILURE(status)) {
-                               if (status == AE_CTRL_END) {    /* Callback abort */
-                                       status = AE_OK;
-                               }
-                               goto unlock_and_exit;
-                       }
-
-                       gpe_block = gpe_block->next;
-               }
-
-               gpe_xrupt_info = gpe_xrupt_info->next;
-       }
-
-      unlock_and_exit:
-       acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
-       return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_delete_gpe_handlers
- *
- * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
- *              gpe_block           - Gpe Block info
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
- *              Used only prior to termination.
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
-                           struct acpi_gpe_block_info *gpe_block,
-                           void *context)
-{
-       struct acpi_gpe_event_info *gpe_event_info;
-       u32 i;
-       u32 j;
-
-       ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
-
-       /* Examine each GPE Register within the block */
-
-       for (i = 0; i < gpe_block->register_count; i++) {
-
-               /* Now look at the individual GPEs in this byte register */
-
-               for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
-                       gpe_event_info = &gpe_block->event_info[((acpi_size) i *
-                                                                ACPI_GPE_REGISTER_WIDTH)
-                                                               + j];
-
-                       if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-                           ACPI_GPE_DISPATCH_HANDLER) {
-                               ACPI_FREE(gpe_event_info->dispatch.handler);
-                               gpe_event_info->dispatch.handler = NULL;
-                               gpe_event_info->flags &=
-                                   ~ACPI_GPE_DISPATCH_MASK;
-                       }
-               }
-       }
-
-       return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_match_gpe_method
- *
- * PARAMETERS:  Callback from walk_namespace
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
- *              control method under the _GPE portion of the namespace.
- *              Extract the name and GPE type from the object, saving this
- *              information for quick lookup during GPE dispatch. Allows a
- *              per-owner_id evaluation if execute_by_owner_id is TRUE in the
- *              walk_info parameter block.
- *
- *              The name of each GPE control method is of the form:
- *              "_Lxx" or "_Exx", where:
- *                  L      - means that the GPE is level triggered
- *                  E      - means that the GPE is edge triggered
- *                  xx     - is the GPE number [in HEX]
- *
- * If walk_info->execute_by_owner_id is TRUE, we only execute examine GPE methods
- *    with that owner.
- * If walk_info->enable_this_gpe is TRUE, the GPE that is referred to by a GPE
- *    method is immediately enabled (Used for Load/load_table operators)
- *
- ******************************************************************************/
-
-static acpi_status
-acpi_ev_match_gpe_method(acpi_handle obj_handle,
-                        u32 level, void *context, void **return_value)
-{
-       struct acpi_namespace_node *method_node =
-           ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
-       struct acpi_gpe_walk_info *walk_info =
-           ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
-       struct acpi_gpe_event_info *gpe_event_info;
-       struct acpi_namespace_node *gpe_device;
-       acpi_status status;
-       u32 gpe_number;
-       char name[ACPI_NAME_SIZE + 1];
-       u8 type;
-
-       ACPI_FUNCTION_TRACE(ev_match_gpe_method);
-
-       /* Check if requested owner_id matches this owner_id */
-
-       if ((walk_info->execute_by_owner_id) &&
-           (method_node->owner_id != walk_info->owner_id)) {
-               return_ACPI_STATUS(AE_OK);
-       }
-
-       /*
-        * Match and decode the _Lxx and _Exx GPE method names
-        *
-        * 1) Extract the method name and null terminate it
-        */
-       ACPI_MOVE_32_TO_32(name, &method_node->name.integer);
-       name[ACPI_NAME_SIZE] = 0;
-
-       /* 2) Name must begin with an underscore */
-
-       if (name[0] != '_') {
-               return_ACPI_STATUS(AE_OK);      /* Ignore this method */
-       }
-
-       /*
-        * 3) Edge/Level determination is based on the 2nd character
-        *    of the method name
-        *
-        * NOTE: Default GPE type is RUNTIME only. Later, if a _PRW object is
-        * found that points to this GPE, the ACPI_GPE_CAN_WAKE flag is set.
-        */
-       switch (name[1]) {
-       case 'L':
-               type = ACPI_GPE_LEVEL_TRIGGERED;
-               break;
-
-       case 'E':
-               type = ACPI_GPE_EDGE_TRIGGERED;
-               break;
-
-       default:
-               /* Unknown method type, just ignore it */
-
-               ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
-                                 "Ignoring unknown GPE method type: %s "
-                                 "(name not of form _Lxx or _Exx)", name));
-               return_ACPI_STATUS(AE_OK);
-       }
-
-       /* 4) The last two characters of the name are the hex GPE Number */
-
-       gpe_number = ACPI_STRTOUL(&name[2], NULL, 16);
-       if (gpe_number == ACPI_UINT32_MAX) {
-
-               /* Conversion failed; invalid method, just ignore it */
-
-               ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
-                                 "Could not extract GPE number from name: %s "
-                                 "(name is not of form _Lxx or _Exx)", name));
-               return_ACPI_STATUS(AE_OK);
-       }
-
-       /* Ensure that we have a valid GPE number for this GPE block */
-
-       gpe_event_info =
-           acpi_ev_low_get_gpe_info(gpe_number, walk_info->gpe_block);
-       if (!gpe_event_info) {
-               /*
-                * This gpe_number is not valid for this GPE block, just ignore it.
-                * However, it may be valid for a different GPE block, since GPE0
-                * and GPE1 methods both appear under \_GPE.
-                */
-               return_ACPI_STATUS(AE_OK);
-       }
-
-       if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-           ACPI_GPE_DISPATCH_HANDLER) {
-
-               /* If there is already a handler, ignore this GPE method */
-
-               return_ACPI_STATUS(AE_OK);
-       }
-
-       if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-           ACPI_GPE_DISPATCH_METHOD) {
-               /*
-                * If there is already a method, ignore this method. But check
-                * for a type mismatch (if both the _Lxx AND _Exx exist)
-                */
-               if (type != (gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) {
-                       ACPI_ERROR((AE_INFO,
-                                   "For GPE 0x%.2X, found both _L%2.2X and _E%2.2X methods",
-                                   gpe_number, gpe_number, gpe_number));
-               }
-               return_ACPI_STATUS(AE_OK);
-       }
-
-       /*
-        * Add the GPE information from above to the gpe_event_info block for
-        * use during dispatch of this GPE.
-        */
-       gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_METHOD);
-       gpe_event_info->dispatch.method_node = method_node;
-
-       /*
-        * Enable this GPE if requested. This only happens when during the
-        * execution of a Load or load_table operator. We have found a new
-        * GPE method and want to immediately enable the GPE if it is a
-        * runtime GPE.
-        */
-       if (walk_info->enable_this_gpe) {
-
-               /* Ignore GPEs that can wake the system */
-
-               if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE) ||
-                   !acpi_gbl_leave_wake_gpes_disabled) {
-                       walk_info->count++;
-                       gpe_device = walk_info->gpe_device;
-
-                       if (gpe_device == acpi_gbl_fadt_gpe_device) {
-                               gpe_device = NULL;
-                       }
-
-                       status = acpi_enable_gpe(gpe_device, gpe_number,
-                                                ACPI_GPE_TYPE_RUNTIME);
-                       if (ACPI_FAILURE(status)) {
-                               ACPI_EXCEPTION((AE_INFO, status,
-                                               "Could not enable GPE 0x%02X",
-                                               gpe_number));
-                       }
-               }
-       }
-
-       ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
-                         "Registered GPE method %s as GPE number 0x%.2X\n",
-                         name, gpe_number));
-       return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_match_prw_and_gpe
- *
- * PARAMETERS:  Callback from walk_namespace
- *
- * RETURN:      Status. NOTE: We ignore errors so that the _PRW walk is
- *              not aborted on a single _PRW failure.
- *
- * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
- *              Device. Run the _PRW method. If present, extract the GPE
- *              number and mark the GPE as a CAN_WAKE GPE. Allows a
- *              per-owner_id execution if execute_by_owner_id is TRUE in the
- *              walk_info parameter block.
- *
- * If walk_info->execute_by_owner_id is TRUE, we only execute _PRWs with that
- *    owner.
- * If walk_info->gpe_device is NULL, we execute every _PRW found. Otherwise,
- *    we only execute _PRWs that refer to the input gpe_device.
- *
- ******************************************************************************/
-
-static acpi_status
-acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
-                         u32 level, void *context, void **return_value)
-{
-       struct acpi_gpe_walk_info *walk_info =
-           ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
-       struct acpi_namespace_node *gpe_device;
-       struct acpi_gpe_block_info *gpe_block;
-       struct acpi_namespace_node *target_gpe_device;
-       struct acpi_namespace_node *prw_node;
-       struct acpi_gpe_event_info *gpe_event_info;
-       union acpi_operand_object *pkg_desc;
-       union acpi_operand_object *obj_desc;
-       u32 gpe_number;
-       acpi_status status;
-
-       ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe);
-
-       /* Check for a _PRW method under this device */
-
-       status = acpi_ns_get_node(obj_handle, METHOD_NAME__PRW,
-                                 ACPI_NS_NO_UPSEARCH, &prw_node);
-       if (ACPI_FAILURE(status)) {
-               return_ACPI_STATUS(AE_OK);
-       }
-
-       /* Check if requested owner_id matches this owner_id */
-
-       if ((walk_info->execute_by_owner_id) &&
-           (prw_node->owner_id != walk_info->owner_id)) {
-               return_ACPI_STATUS(AE_OK);
-       }
-
-       /* Execute the _PRW */
-
-       status = acpi_ut_evaluate_object(prw_node, NULL,
-                                        ACPI_BTYPE_PACKAGE, &pkg_desc);
-       if (ACPI_FAILURE(status)) {
-               return_ACPI_STATUS(AE_OK);
-       }
-
-       /* The returned _PRW package must have at least two elements */
-
-       if (pkg_desc->package.count < 2) {
-               goto cleanup;
-       }
-
-       /* Extract pointers from the input context */
-
-       gpe_device = walk_info->gpe_device;
-       gpe_block = walk_info->gpe_block;
-
-       /*
-        * The _PRW object must return a package, we are only interested
-        * in the first element
-        */
-       obj_desc = pkg_desc->package.elements[0];
-
-       if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
-
-               /* Use FADT-defined GPE device (from definition of _PRW) */
-
-               target_gpe_device = NULL;
-               if (gpe_device) {
-                       target_gpe_device = acpi_gbl_fadt_gpe_device;
-               }
-
-               /* Integer is the GPE number in the FADT described GPE blocks */
-
-               gpe_number = (u32) obj_desc->integer.value;
-       } else if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
-
-               /* Package contains a GPE reference and GPE number within a GPE block */
-
-               if ((obj_desc->package.count < 2) ||
-                   ((obj_desc->package.elements[0])->common.type !=
-                    ACPI_TYPE_LOCAL_REFERENCE) ||
-                   ((obj_desc->package.elements[1])->common.type !=
-                    ACPI_TYPE_INTEGER)) {
-                       goto cleanup;
-               }
-
-               /* Get GPE block reference and decode */
-
-               target_gpe_device =
-                   obj_desc->package.elements[0]->reference.node;
-               gpe_number = (u32) obj_desc->package.elements[1]->integer.value;
-       } else {
-               /* Unknown type, just ignore it */
-
-               goto cleanup;
-       }
-
-       /* Get the gpe_event_info for this GPE */
-
-       if (gpe_device) {
-               /*
-                * Is this GPE within this block?
-                *
-                * TRUE if and only if these conditions are true:
-                *     1) The GPE devices match.
-                *     2) The GPE index(number) is within the range of the Gpe Block
-                *          associated with the GPE device.
-                */
-               if (gpe_device != target_gpe_device) {
-                       goto cleanup;
-               }
-
-               gpe_event_info =
-                   acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
-       } else {
-               /* gpe_device is NULL, just match the target_device and gpe_number */
-
-               gpe_event_info =
-                   acpi_ev_get_gpe_event_info(target_gpe_device, gpe_number);
-       }
-
-       if (gpe_event_info) {
-               if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
-
-                       /* This GPE can wake the system */
-
-                       gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
-                       walk_info->count++;
-               }
-       }
-
-      cleanup:
-       acpi_ut_remove_reference(pkg_desc);
-       return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_get_gpe_xrupt_block
- *
- * PARAMETERS:  interrupt_number     - Interrupt for a GPE block
- *
- * RETURN:      A GPE interrupt block
- *
- * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
- *              block per unique interrupt level used for GPEs. Should be
- *              called only when the GPE lists are semaphore locked and not
- *              subject to change.
- *
- ******************************************************************************/
-
-static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32
-                                                              interrupt_number)
-{
-       struct acpi_gpe_xrupt_info *next_gpe_xrupt;
-       struct acpi_gpe_xrupt_info *gpe_xrupt;
-       acpi_status status;
-       acpi_cpu_flags flags;
-
-       ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
-
-       /* No need for lock since we are not changing any list elements here */
-
-       next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
-       while (next_gpe_xrupt) {
-               if (next_gpe_xrupt->interrupt_number == interrupt_number) {
-                       return_PTR(next_gpe_xrupt);
-               }
-
-               next_gpe_xrupt = next_gpe_xrupt->next;
-       }
-
-       /* Not found, must allocate a new xrupt descriptor */
-
-       gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
-       if (!gpe_xrupt) {
-               return_PTR(NULL);
-       }
-
-       gpe_xrupt->interrupt_number = interrupt_number;
-
-       /* Install new interrupt descriptor with spin lock */
-
-       flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
-       if (acpi_gbl_gpe_xrupt_list_head) {
-               next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
-               while (next_gpe_xrupt->next) {
-                       next_gpe_xrupt = next_gpe_xrupt->next;
-               }
-
-               next_gpe_xrupt->next = gpe_xrupt;
-               gpe_xrupt->previous = next_gpe_xrupt;
-       } else {
-               acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
-       }
-       acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
-
-       /* Install new interrupt handler if not SCI_INT */
-
-       if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
-               status = acpi_os_install_interrupt_handler(interrupt_number,
-                                                          acpi_ev_gpe_xrupt_handler,
-                                                          gpe_xrupt);
-               if (ACPI_FAILURE(status)) {
-                       ACPI_ERROR((AE_INFO,
-                                   "Could not install GPE interrupt handler at level 0x%X",
-                                   interrupt_number));
-                       return_PTR(NULL);
-               }
-       }
-
-       return_PTR(gpe_xrupt);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_delete_gpe_xrupt
- *
- * PARAMETERS:  gpe_xrupt       - A GPE interrupt info block
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
- *              interrupt handler if not the SCI interrupt.
- *
- ******************************************************************************/
-
-static acpi_status
-acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
-{
-       acpi_status status;
-       acpi_cpu_flags flags;
-
-       ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
-
-       /* We never want to remove the SCI interrupt handler */
-
-       if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
-               gpe_xrupt->gpe_block_list_head = NULL;
-               return_ACPI_STATUS(AE_OK);
-       }
-
-       /* Disable this interrupt */
-
-       status =
-           acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
-                                            acpi_ev_gpe_xrupt_handler);
-       if (ACPI_FAILURE(status)) {
-               return_ACPI_STATUS(status);
-       }
-
-       /* Unlink the interrupt block with lock */
-
-       flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
-       if (gpe_xrupt->previous) {
-               gpe_xrupt->previous->next = gpe_xrupt->next;
-       } else {
-               /* No previous, update list head */
-
-               acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
-       }
-
-       if (gpe_xrupt->next) {
-               gpe_xrupt->next->previous = gpe_xrupt->previous;
-       }
-       acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
-
-       /* Free the block */
-
-       ACPI_FREE(gpe_xrupt);
-       return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_ev_install_gpe_block
  *
  * PARAMETERS:  gpe_block               - New GPE block
@@ -1060,123 +419,6 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ev_update_gpes
- *
- * PARAMETERS:  table_owner_id      - ID of the newly-loaded ACPI table
- *
- * RETURN:      None
- *
- * DESCRIPTION: Check for new GPE methods (_Lxx/_Exx) made available as a
- *              result of a Load() or load_table() operation. If new GPE
- *              methods have been installed, register the new methods and
- *              enable and runtime GPEs that are associated with them. Also,
- *              run any newly loaded _PRW methods in order to discover any
- *              new CAN_WAKE GPEs.
- *
- ******************************************************************************/
-
-void acpi_ev_update_gpes(acpi_owner_id table_owner_id)
-{
-       struct acpi_gpe_xrupt_info *gpe_xrupt_info;
-       struct acpi_gpe_block_info *gpe_block;
-       struct acpi_gpe_walk_info walk_info;
-       acpi_status status = AE_OK;
-       u32 new_wake_gpe_count = 0;
-
-       /* We will examine only _PRW/_Lxx/_Exx methods owned by this table */
-
-       walk_info.owner_id = table_owner_id;
-       walk_info.execute_by_owner_id = TRUE;
-       walk_info.count = 0;
-
-       if (acpi_gbl_leave_wake_gpes_disabled) {
-               /*
-                * 1) Run any newly-loaded _PRW methods to find any GPEs that
-                * can now be marked as CAN_WAKE GPEs. Note: We must run the
-                * _PRW methods before we process the _Lxx/_Exx methods because
-                * we will enable all runtime GPEs associated with the new
-                * _Lxx/_Exx methods at the time we process those methods.
-                *
-                * Unlock interpreter so that we can run the _PRW methods.
-                */
-               walk_info.gpe_block = NULL;
-               walk_info.gpe_device = NULL;
-
-               acpi_ex_exit_interpreter();
-
-               status =
-                   acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
-                                          ACPI_UINT32_MAX,
-                                          ACPI_NS_WALK_NO_UNLOCK,
-                                          acpi_ev_match_prw_and_gpe, NULL,
-                                          &walk_info, NULL);
-               if (ACPI_FAILURE(status)) {
-                       ACPI_EXCEPTION((AE_INFO, status,
-                                       "While executing _PRW methods"));
-               }
-
-               acpi_ex_enter_interpreter();
-               new_wake_gpe_count = walk_info.count;
-       }
-
-       /*
-        * 2) Find any _Lxx/_Exx GPE methods that have just been loaded.
-        *
-        * Any GPEs that correspond to new _Lxx/_Exx methods and are not
-        * marked as CAN_WAKE are immediately enabled.
-        *
-        * Examine the namespace underneath each gpe_device within the
-        * gpe_block lists.
-        */
-       status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
-       if (ACPI_FAILURE(status)) {
-               return;
-       }
-
-       walk_info.count = 0;
-       walk_info.enable_this_gpe = TRUE;
-
-       /* Walk the interrupt level descriptor list */
-
-       gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
-       while (gpe_xrupt_info) {
-
-               /* Walk all Gpe Blocks attached to this interrupt level */
-
-               gpe_block = gpe_xrupt_info->gpe_block_list_head;
-               while (gpe_block) {
-                       walk_info.gpe_block = gpe_block;
-                       walk_info.gpe_device = gpe_block->node;
-
-                       status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD,
-                                                       walk_info.gpe_device,
-                                                       ACPI_UINT32_MAX,
-                                                       ACPI_NS_WALK_NO_UNLOCK,
-                                                       acpi_ev_match_gpe_method,
-                                                       NULL, &walk_info, NULL);
-                       if (ACPI_FAILURE(status)) {
-                               ACPI_EXCEPTION((AE_INFO, status,
-                                               "While decoding _Lxx/_Exx methods"));
-                       }
-
-                       gpe_block = gpe_block->next;
-               }
-
-               gpe_xrupt_info = gpe_xrupt_info->next;
-       }
-
-       if (walk_info.count || new_wake_gpe_count) {
-               ACPI_INFO((AE_INFO,
-                          "Enabled %u new runtime GPEs, added %u new wakeup GPEs",
-                          walk_info.count, new_wake_gpe_count));
-       }
-
-       (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-       return;
-}
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_ev_initialize_gpe_block
  *
  * PARAMETERS:  gpe_device          - Handle to the parent GPE block
@@ -1296,154 +538,3 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
 
        return_ACPI_STATUS(AE_OK);
 }
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_gpe_initialize
- *
- * PARAMETERS:  None
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Initialize the GPE data structures
- *
- ******************************************************************************/
-
-acpi_status acpi_ev_gpe_initialize(void)
-{
-       u32 register_count0 = 0;
-       u32 register_count1 = 0;
-       u32 gpe_number_max = 0;
-       acpi_status status;
-
-       ACPI_FUNCTION_TRACE(ev_gpe_initialize);
-
-       status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-       if (ACPI_FAILURE(status)) {
-               return_ACPI_STATUS(status);
-       }
-
-       /*
-        * Initialize the GPE Block(s) defined in the FADT
-        *
-        * Why the GPE register block lengths are divided by 2:  From the ACPI
-        * Spec, section "General-Purpose Event Registers", we have:
-        *
-        * "Each register block contains two registers of equal length
-        *  GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
-        *  GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
-        *  The length of the GPE1_STS and GPE1_EN registers is equal to
-        *  half the GPE1_LEN. If a generic register block is not supported
-        *  then its respective block pointer and block length values in the
-        *  FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
-        *  to be the same size."
-        */
-
-       /*
-        * Determine the maximum GPE number for this machine.
-        *
-        * Note: both GPE0 and GPE1 are optional, and either can exist without
-        * the other.
-        *
-        * If EITHER the register length OR the block address are zero, then that
-        * particular block is not supported.
-        */
-       if (acpi_gbl_FADT.gpe0_block_length &&
-           acpi_gbl_FADT.xgpe0_block.address) {
-
-               /* GPE block 0 exists (has both length and address > 0) */
-
-               register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2);
-
-               gpe_number_max =
-                   (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1;
-
-               /* Install GPE Block 0 */
-
-               status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
-                                                 &acpi_gbl_FADT.xgpe0_block,
-                                                 register_count0, 0,
-                                                 acpi_gbl_FADT.sci_interrupt,
-                                                 &acpi_gbl_gpe_fadt_blocks[0]);
-
-               if (ACPI_FAILURE(status)) {
-                       ACPI_EXCEPTION((AE_INFO, status,
-                                       "Could not create GPE Block 0"));
-               }
-       }
-
-       if (acpi_gbl_FADT.gpe1_block_length &&
-           acpi_gbl_FADT.xgpe1_block.address) {
-
-               /* GPE block 1 exists (has both length and address > 0) */
-
-               register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2);
-
-               /* Check for GPE0/GPE1 overlap (if both banks exist) */
-
-               if ((register_count0) &&
-                   (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) {
-                       ACPI_ERROR((AE_INFO,
-                                   "GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
-                                   "(GPE %u to %u) - Ignoring GPE1",
-                                   gpe_number_max, acpi_gbl_FADT.gpe1_base,
-                                   acpi_gbl_FADT.gpe1_base +
-                                   ((register_count1 *
-                                     ACPI_GPE_REGISTER_WIDTH) - 1)));
-
-                       /* Ignore GPE1 block by setting the register count to zero */
-
-                       register_count1 = 0;
-               } else {
-                       /* Install GPE Block 1 */
-
-                       status =
-                           acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
-                                                    &acpi_gbl_FADT.xgpe1_block,
-                                                    register_count1,
-                                                    acpi_gbl_FADT.gpe1_base,
-                                                    acpi_gbl_FADT.
-                                                    sci_interrupt,
-                                                    &acpi_gbl_gpe_fadt_blocks
-                                                    [1]);
-
-                       if (ACPI_FAILURE(status)) {
-                               ACPI_EXCEPTION((AE_INFO, status,
-                                               "Could not create GPE Block 1"));
-                       }
-
-                       /*
-                        * GPE0 and GPE1 do not have to be contiguous in the GPE number
-                        * space. However, GPE0 always starts at GPE number zero.
-                        */
-                       gpe_number_max = acpi_gbl_FADT.gpe1_base +
-                           ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1);
-               }
-       }
-
-       /* Exit if there are no GPE registers */
-
-       if ((register_count0 + register_count1) == 0) {
-
-               /* GPEs are not required by ACPI, this is OK */
-
-               ACPI_DEBUG_PRINT((ACPI_DB_INIT,
-                                 "There are no GPE blocks defined in the FADT\n"));
-               status = AE_OK;
-               goto cleanup;
-       }
-
-       /* Check for Max GPE number out-of-range */
-
-       if (gpe_number_max > ACPI_GPE_MAX) {
-               ACPI_ERROR((AE_INFO,
-                           "Maximum GPE number from FADT is too large: 0x%X",
-                           gpe_number_max));
-               status = AE_BAD_VALUE;
-               goto cleanup;
-       }
-
-      cleanup:
-       (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-       return_ACPI_STATUS(AE_OK);
-}
diff --git a/drivers/acpi/acpica/evgpeinit.c b/drivers/acpi/acpica/evgpeinit.c
new file mode 100644 (file)
index 0000000..3f6c2d2
--- /dev/null
@@ -0,0 +1,653 @@
+/******************************************************************************
+ *
+ * Module Name: evgpeinit - System GPE initialization and update
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2010, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acevents.h"
+#include "acnamesp.h"
+#include "acinterp.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evgpeinit")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_gpe_initialize
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize the GPE data structures and the FADT GPE 0/1 blocks
+ *
+ ******************************************************************************/
+acpi_status acpi_ev_gpe_initialize(void)
+{
+       u32 register_count0 = 0;
+       u32 register_count1 = 0;
+       u32 gpe_number_max = 0;
+       acpi_status status;
+
+       ACPI_FUNCTION_TRACE(ev_gpe_initialize);
+
+       status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+       if (ACPI_FAILURE(status)) {
+               return_ACPI_STATUS(status);
+       }
+
+       /*
+        * Initialize the GPE Block(s) defined in the FADT
+        *
+        * Why the GPE register block lengths are divided by 2:  From the ACPI
+        * Spec, section "General-Purpose Event Registers", we have:
+        *
+        * "Each register block contains two registers of equal length
+        *  GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
+        *  GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
+        *  The length of the GPE1_STS and GPE1_EN registers is equal to
+        *  half the GPE1_LEN. If a generic register block is not supported
+        *  then its respective block pointer and block length values in the
+        *  FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
+        *  to be the same size."
+        */
+
+       /*
+        * Determine the maximum GPE number for this machine.
+        *
+        * Note: both GPE0 and GPE1 are optional, and either can exist without
+        * the other.
+        *
+        * If EITHER the register length OR the block address are zero, then that
+        * particular block is not supported.
+        */
+       if (acpi_gbl_FADT.gpe0_block_length &&
+           acpi_gbl_FADT.xgpe0_block.address) {
+
+               /* GPE block 0 exists (has both length and address > 0) */
+
+               register_count0 = (u16)(acpi_gbl_FADT.gpe0_block_length / 2);
+
+               gpe_number_max =
+                   (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1;
+
+               /* Install GPE Block 0 */
+
+               status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
+                                                 &acpi_gbl_FADT.xgpe0_block,
+                                                 register_count0, 0,
+                                                 acpi_gbl_FADT.sci_interrupt,
+                                                 &acpi_gbl_gpe_fadt_blocks[0]);
+
+               if (ACPI_FAILURE(status)) {
+                       ACPI_EXCEPTION((AE_INFO, status,
+                                       "Could not create GPE Block 0"));
+               }
+       }
+
+       if (acpi_gbl_FADT.gpe1_block_length &&
+           acpi_gbl_FADT.xgpe1_block.address) {
+
+               /* GPE block 1 exists (has both length and address > 0) */
+
+               register_count1 = (u16)(acpi_gbl_FADT.gpe1_block_length / 2);
+
+               /* Check for GPE0/GPE1 overlap (if both banks exist) */
+
+               if ((register_count0) &&
+                   (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) {
+                       ACPI_ERROR((AE_INFO,
+                                   "GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
+                                   "(GPE %u to %u) - Ignoring GPE1",
+                                   gpe_number_max, acpi_gbl_FADT.gpe1_base,
+                                   acpi_gbl_FADT.gpe1_base +
+                                   ((register_count1 *
+                                     ACPI_GPE_REGISTER_WIDTH) - 1)));
+
+                       /* Ignore GPE1 block by setting the register count to zero */
+
+                       register_count1 = 0;
+               } else {
+                       /* Install GPE Block 1 */
+
+                       status =
+                           acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
+                                                    &acpi_gbl_FADT.xgpe1_block,
+                                                    register_count1,
+                                                    acpi_gbl_FADT.gpe1_base,
+                                                    acpi_gbl_FADT.
+                                                    sci_interrupt,
+                                                    &acpi_gbl_gpe_fadt_blocks
+                                                    [1]);
+
+                       if (ACPI_FAILURE(status)) {
+                               ACPI_EXCEPTION((AE_INFO, status,
+                                               "Could not create GPE Block 1"));
+                       }
+
+                       /*
+                        * GPE0 and GPE1 do not have to be contiguous in the GPE number
+                        * space. However, GPE0 always starts at GPE number zero.
+                        */
+                       gpe_number_max = acpi_gbl_FADT.gpe1_base +
+                           ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1);
+               }
+       }
+
+       /* Exit if there are no GPE registers */
+
+       if ((register_count0 + register_count1) == 0) {
+
+               /* GPEs are not required by ACPI, this is OK */
+
+               ACPI_DEBUG_PRINT((ACPI_DB_INIT,
+                                 "There are no GPE blocks defined in the FADT\n"));
+               status = AE_OK;
+               goto cleanup;
+       }
+
+       /* Check for Max GPE number out-of-range */
+
+       if (gpe_number_max > ACPI_GPE_MAX) {
+               ACPI_ERROR((AE_INFO,
+                           "Maximum GPE number from FADT is too large: 0x%X",
+                           gpe_number_max));
+               status = AE_BAD_VALUE;
+               goto cleanup;
+       }
+
+      cleanup:
+       (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+       return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_update_gpes
+ *
+ * PARAMETERS:  table_owner_id      - ID of the newly-loaded ACPI table
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Check for new GPE methods (_Lxx/_Exx) made available as a
+ *              result of a Load() or load_table() operation. If new GPE
+ *              methods have been installed, register the new methods and
+ *              enable and runtime GPEs that are associated with them. Also,
+ *              run any newly loaded _PRW methods in order to discover any
+ *              new CAN_WAKE GPEs.
+ *
+ ******************************************************************************/
+
+void acpi_ev_update_gpes(acpi_owner_id table_owner_id)
+{
+       struct acpi_gpe_xrupt_info *gpe_xrupt_info;
+       struct acpi_gpe_block_info *gpe_block;
+       struct acpi_gpe_walk_info walk_info;
+       acpi_status status = AE_OK;
+       u32 new_wake_gpe_count = 0;
+
+       /* We will examine only _PRW/_Lxx/_Exx methods owned by this table */
+
+       walk_info.owner_id = table_owner_id;
+       walk_info.execute_by_owner_id = TRUE;
+       walk_info.count = 0;
+
+       if (acpi_gbl_leave_wake_gpes_disabled) {
+               /*
+                * 1) Run any newly-loaded _PRW methods to find any GPEs that
+                * can now be marked as CAN_WAKE GPEs. Note: We must run the
+                * _PRW methods before we process the _Lxx/_Exx methods because
+                * we will enable all runtime GPEs associated with the new
+                * _Lxx/_Exx methods at the time we process those methods.
+                *
+                * Unlock interpreter so that we can run the _PRW methods.
+                */
+               walk_info.gpe_block = NULL;
+               walk_info.gpe_device = NULL;
+
+               acpi_ex_exit_interpreter();
+
+               status =
+                   acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+                                          ACPI_UINT32_MAX,
+                                          ACPI_NS_WALK_NO_UNLOCK,
+                                          acpi_ev_match_prw_and_gpe, NULL,
+                                          &walk_info, NULL);
+               if (ACPI_FAILURE(status)) {
+                       ACPI_EXCEPTION((AE_INFO, status,
+                                       "While executing _PRW methods"));
+               }
+
+               acpi_ex_enter_interpreter();
+               new_wake_gpe_count = walk_info.count;
+       }
+
+       /*
+        * 2) Find any _Lxx/_Exx GPE methods that have just been loaded.
+        *
+        * Any GPEs that correspond to new _Lxx/_Exx methods and are not
+        * marked as CAN_WAKE are immediately enabled.
+        *
+        * Examine the namespace underneath each gpe_device within the
+        * gpe_block lists.
+        */
+       status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+       if (ACPI_FAILURE(status)) {
+               return;
+       }
+
+       walk_info.count = 0;
+       walk_info.enable_this_gpe = TRUE;
+
+       /* Walk the interrupt level descriptor list */
+
+       gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
+       while (gpe_xrupt_info) {
+
+               /* Walk all Gpe Blocks attached to this interrupt level */
+
+               gpe_block = gpe_xrupt_info->gpe_block_list_head;
+               while (gpe_block) {
+                       walk_info.gpe_block = gpe_block;
+                       walk_info.gpe_device = gpe_block->node;
+
+                       status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD,
+                                                       walk_info.gpe_device,
+                                                       ACPI_UINT32_MAX,
+                                                       ACPI_NS_WALK_NO_UNLOCK,
+                                                       acpi_ev_match_gpe_method,
+                                                       NULL, &walk_info, NULL);
+                       if (ACPI_FAILURE(status)) {
+                               ACPI_EXCEPTION((AE_INFO, status,
+                                               "While decoding _Lxx/_Exx methods"));
+                       }
+
+                       gpe_block = gpe_block->next;
+               }
+
+               gpe_xrupt_info = gpe_xrupt_info->next;
+       }
+
+       if (walk_info.count || new_wake_gpe_count) {
+               ACPI_INFO((AE_INFO,
+                          "Enabled %u new runtime GPEs, added %u new wakeup GPEs",
+                          walk_info.count, new_wake_gpe_count));
+       }
+
+       (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+       return;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_match_gpe_method
+ *
+ * PARAMETERS:  Callback from walk_namespace
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
+ *              control method under the _GPE portion of the namespace.
+ *              Extract the name and GPE type from the object, saving this
+ *              information for quick lookup during GPE dispatch. Allows a
+ *              per-owner_id evaluation if execute_by_owner_id is TRUE in the
+ *              walk_info parameter block.
+ *
+ *              The name of each GPE control method is of the form:
+ *              "_Lxx" or "_Exx", where:
+ *                  L      - means that the GPE is level triggered
+ *                  E      - means that the GPE is edge triggered
+ *                  xx     - is the GPE number [in HEX]
+ *
+ * If walk_info->execute_by_owner_id is TRUE, we only execute examine GPE methods
+ *    with that owner.
+ * If walk_info->enable_this_gpe is TRUE, the GPE that is referred to by a GPE
+ *    method is immediately enabled (Used for Load/load_table operators)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_match_gpe_method(acpi_handle obj_handle,
+                        u32 level, void *context, void **return_value)
+{
+       struct acpi_namespace_node *method_node =
+           ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
+       struct acpi_gpe_walk_info *walk_info =
+           ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
+       struct acpi_gpe_event_info *gpe_event_info;
+       struct acpi_namespace_node *gpe_device;
+       acpi_status status;
+       u32 gpe_number;
+       char name[ACPI_NAME_SIZE + 1];
+       u8 type;
+
+       ACPI_FUNCTION_TRACE(ev_match_gpe_method);
+
+       /* Check if requested owner_id matches this owner_id */
+
+       if ((walk_info->execute_by_owner_id) &&
+           (method_node->owner_id != walk_info->owner_id)) {
+               return_ACPI_STATUS(AE_OK);
+       }
+
+       /*
+        * Match and decode the _Lxx and _Exx GPE method names
+        *
+        * 1) Extract the method name and null terminate it
+        */
+       ACPI_MOVE_32_TO_32(name, &method_node->name.integer);
+       name[ACPI_NAME_SIZE] = 0;
+
+       /* 2) Name must begin with an underscore */
+
+       if (name[0] != '_') {
+               return_ACPI_STATUS(AE_OK);      /* Ignore this method */
+       }
+
+       /*
+        * 3) Edge/Level determination is based on the 2nd character
+        *    of the method name
+        *
+        * NOTE: Default GPE type is RUNTIME only. Later, if a _PRW object is
+        * found that points to this GPE, the ACPI_GPE_CAN_WAKE flag is set.
+        */
+       switch (name[1]) {
+       case 'L':
+               type = ACPI_GPE_LEVEL_TRIGGERED;
+               break;
+
+       case 'E':
+               type = ACPI_GPE_EDGE_TRIGGERED;
+               break;
+
+       default:
+               /* Unknown method type, just ignore it */
+
+               ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
+                                 "Ignoring unknown GPE method type: %s "
+                                 "(name not of form _Lxx or _Exx)", name));
+               return_ACPI_STATUS(AE_OK);
+       }
+
+       /* 4) The last two characters of the name are the hex GPE Number */
+
+       gpe_number = ACPI_STRTOUL(&name[2], NULL, 16);
+       if (gpe_number == ACPI_UINT32_MAX) {
+
+               /* Conversion failed; invalid method, just ignore it */
+
+               ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
+                                 "Could not extract GPE number from name: %s "
+                                 "(name is not of form _Lxx or _Exx)", name));
+               return_ACPI_STATUS(AE_OK);
+       }
+
+       /* Ensure that we have a valid GPE number for this GPE block */
+
+       gpe_event_info =
+           acpi_ev_low_get_gpe_info(gpe_number, walk_info->gpe_block);
+       if (!gpe_event_info) {
+               /*
+                * This gpe_number is not valid for this GPE block, just ignore it.
+                * However, it may be valid for a different GPE block, since GPE0
+                * and GPE1 methods both appear under \_GPE.
+                */
+               return_ACPI_STATUS(AE_OK);
+       }
+
+       if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+           ACPI_GPE_DISPATCH_HANDLER) {
+
+               /* If there is already a handler, ignore this GPE method */
+
+               return_ACPI_STATUS(AE_OK);
+       }
+
+       if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+           ACPI_GPE_DISPATCH_METHOD) {
+               /*
+                * If there is already a method, ignore this method. But check
+                * for a type mismatch (if both the _Lxx AND _Exx exist)
+                */
+               if (type != (gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) {
+                       ACPI_ERROR((AE_INFO,
+                                   "For GPE 0x%.2X, found both _L%2.2X and _E%2.2X methods",
+                                   gpe_number, gpe_number, gpe_number));
+               }
+               return_ACPI_STATUS(AE_OK);
+       }
+
+       /*
+        * Add the GPE information from above to the gpe_event_info block for
+        * use during dispatch of this GPE.
+        */
+       gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_METHOD);
+       gpe_event_info->dispatch.method_node = method_node;
+
+       /*
+        * Enable this GPE if requested. This only happens when during the
+        * execution of a Load or load_table operator. We have found a new
+        * GPE method and want to immediately enable the GPE if it is a
+        * runtime GPE.
+        */
+       if (walk_info->enable_this_gpe) {
+
+               /* Ignore GPEs that can wake the system */
+
+               if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE) ||
+                   !acpi_gbl_leave_wake_gpes_disabled) {
+                       walk_info->count++;
+                       gpe_device = walk_info->gpe_device;
+
+                       if (gpe_device == acpi_gbl_fadt_gpe_device) {
+                               gpe_device = NULL;
+                       }
+
+                       status = acpi_enable_gpe(gpe_device, gpe_number,
+                                                ACPI_GPE_TYPE_RUNTIME);
+                       if (ACPI_FAILURE(status)) {
+                               ACPI_EXCEPTION((AE_INFO, status,
+                                               "Could not enable GPE 0x%02X",
+                                               gpe_number));
+                       }
+               }
+       }
+
+       ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
+                         "Registered GPE method %s as GPE number 0x%.2X\n",
+                         name, gpe_number));
+       return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_match_prw_and_gpe
+ *
+ * PARAMETERS:  Callback from walk_namespace
+ *
+ * RETURN:      Status. NOTE: We ignore errors so that the _PRW walk is
+ *              not aborted on a single _PRW failure.
+ *
+ * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
+ *              Device. Run the _PRW method. If present, extract the GPE
+ *              number and mark the GPE as a CAN_WAKE GPE. Allows a
+ *              per-owner_id execution if execute_by_owner_id is TRUE in the
+ *              walk_info parameter block.
+ *
+ * If walk_info->execute_by_owner_id is TRUE, we only execute _PRWs with that
+ *    owner.
+ * If walk_info->gpe_device is NULL, we execute every _PRW found. Otherwise,
+ *    we only execute _PRWs that refer to the input gpe_device.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
+                         u32 level, void *context, void **return_value)
+{
+       struct acpi_gpe_walk_info *walk_info =
+           ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
+       struct acpi_namespace_node *gpe_device;
+       struct acpi_gpe_block_info *gpe_block;
+       struct acpi_namespace_node *target_gpe_device;
+       struct acpi_namespace_node *prw_node;
+       struct acpi_gpe_event_info *gpe_event_info;
+       union acpi_operand_object *pkg_desc;
+       union acpi_operand_object *obj_desc;
+       u32 gpe_number;
+       acpi_status status;
+
+       ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe);
+
+       /* Check for a _PRW method under this device */
+
+       status = acpi_ns_get_node(obj_handle, METHOD_NAME__PRW,
+                                 ACPI_NS_NO_UPSEARCH, &prw_node);
+       if (ACPI_FAILURE(status)) {
+               return_ACPI_STATUS(AE_OK);
+       }
+
+       /* Check if requested owner_id matches this owner_id */
+
+       if ((walk_info->execute_by_owner_id) &&
+           (prw_node->owner_id != walk_info->owner_id)) {
+               return_ACPI_STATUS(AE_OK);
+       }
+
+       /* Execute the _PRW */
+
+       status = acpi_ut_evaluate_object(prw_node, NULL,
+                                        ACPI_BTYPE_PACKAGE, &pkg_desc);
+       if (ACPI_FAILURE(status)) {
+               return_ACPI_STATUS(AE_OK);
+       }
+
+       /* The returned _PRW package must have at least two elements */
+
+       if (pkg_desc->package.count < 2) {
+               goto cleanup;
+       }
+
+       /* Extract pointers from the input context */
+
+       gpe_device = walk_info->gpe_device;
+       gpe_block = walk_info->gpe_block;
+
+       /*
+        * The _PRW object must return a package, we are only interested
+        * in the first element
+        */
+       obj_desc = pkg_desc->package.elements[0];
+
+       if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
+
+               /* Use FADT-defined GPE device (from definition of _PRW) */
+
+               target_gpe_device = NULL;
+               if (gpe_device) {
+                       target_gpe_device = acpi_gbl_fadt_gpe_device;
+               }
+
+               /* Integer is the GPE number in the FADT described GPE blocks */
+
+               gpe_number = (u32)obj_desc->integer.value;
+       } else if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
+
+               /* Package contains a GPE reference and GPE number within a GPE block */
+
+               if ((obj_desc->package.count < 2) ||
+                   ((obj_desc->package.elements[0])->common.type !=
+                    ACPI_TYPE_LOCAL_REFERENCE) ||
+                   ((obj_desc->package.elements[1])->common.type !=
+                    ACPI_TYPE_INTEGER)) {
+                       goto cleanup;
+               }
+
+               /* Get GPE block reference and decode */
+
+               target_gpe_device =
+                   obj_desc->package.elements[0]->reference.node;
+               gpe_number = (u32)obj_desc->package.elements[1]->integer.value;
+       } else {
+               /* Unknown type, just ignore it */
+
+               goto cleanup;
+       }
+
+       /* Get the gpe_event_info for this GPE */
+
+       if (gpe_device) {
+               /*
+                * Is this GPE within this block?
+                *
+                * TRUE if and only if these conditions are true:
+                *     1) The GPE devices match.
+                *     2) The GPE index(number) is within the range of the Gpe Block
+                *          associated with the GPE device.
+                */
+               if (gpe_device != target_gpe_device) {
+                       goto cleanup;
+               }
+
+               gpe_event_info =
+                   acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
+       } else {
+               /* gpe_device is NULL, just match the target_device and gpe_number */
+
+               gpe_event_info =
+                   acpi_ev_get_gpe_event_info(target_gpe_device, gpe_number);
+       }
+
+       if (gpe_event_info) {
+               if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
+
+                       /* This GPE can wake the system */
+
+                       gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
+                       walk_info->count++;
+               }
+       }
+
+      cleanup:
+       acpi_ut_remove_reference(pkg_desc);
+       return_ACPI_STATUS(AE_OK);
+}
diff --git a/drivers/acpi/acpica/evgpeutil.c b/drivers/acpi/acpica/evgpeutil.c
new file mode 100644 (file)
index 0000000..19a0e51
--- /dev/null
@@ -0,0 +1,337 @@
+/******************************************************************************
+ *
+ * Module Name: evgpeutil - GPE utilities
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2010, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acevents.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evgpeutil")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_walk_gpe_list
+ *
+ * PARAMETERS:  gpe_walk_callback   - Routine called for each GPE block
+ *              Context             - Value passed to callback
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Walk the GPE lists.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
+{
+       struct acpi_gpe_block_info *gpe_block;
+       struct acpi_gpe_xrupt_info *gpe_xrupt_info;
+       acpi_status status = AE_OK;
+       acpi_cpu_flags flags;
+
+       ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
+
+       flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+       /* Walk the interrupt level descriptor list */
+
+       gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
+       while (gpe_xrupt_info) {
+
+               /* Walk all Gpe Blocks attached to this interrupt level */
+
+               gpe_block = gpe_xrupt_info->gpe_block_list_head;
+               while (gpe_block) {
+
+                       /* One callback per GPE block */
+
+                       status =
+                           gpe_walk_callback(gpe_xrupt_info, gpe_block,
+                                             context);
+                       if (ACPI_FAILURE(status)) {
+                               if (status == AE_CTRL_END) {    /* Callback abort */
+                                       status = AE_OK;
+                               }
+                               goto unlock_and_exit;
+                       }
+
+                       gpe_block = gpe_block->next;
+               }
+
+               gpe_xrupt_info = gpe_xrupt_info->next;
+       }
+
+      unlock_and_exit:
+       acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+       return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_valid_gpe_event
+ *
+ * PARAMETERS:  gpe_event_info              - Info for this GPE
+ *
+ * RETURN:      TRUE if the gpe_event is valid
+ *
+ * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
+ *              Should be called only when the GPE lists are semaphore locked
+ *              and not subject to change.
+ *
+ ******************************************************************************/
+
+u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
+{
+       struct acpi_gpe_xrupt_info *gpe_xrupt_block;
+       struct acpi_gpe_block_info *gpe_block;
+
+       ACPI_FUNCTION_ENTRY();
+
+       /* No need for spin lock since we are not changing any list elements */
+
+       /* Walk the GPE interrupt levels */
+
+       gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
+       while (gpe_xrupt_block) {
+               gpe_block = gpe_xrupt_block->gpe_block_list_head;
+
+               /* Walk the GPE blocks on this interrupt level */
+
+               while (gpe_block) {
+                       if ((&gpe_block->event_info[0] <= gpe_event_info) &&
+                           (&gpe_block->event_info[gpe_block->gpe_count] >
+                            gpe_event_info)) {
+                               return (TRUE);
+                       }
+
+                       gpe_block = gpe_block->next;
+               }
+
+               gpe_xrupt_block = gpe_xrupt_block->next;
+       }
+
+       return (FALSE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_get_gpe_xrupt_block
+ *
+ * PARAMETERS:  interrupt_number     - Interrupt for a GPE block
+ *
+ * RETURN:      A GPE interrupt block
+ *
+ * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
+ *              block per unique interrupt level used for GPEs. Should be
+ *              called only when the GPE lists are semaphore locked and not
+ *              subject to change.
+ *
+ ******************************************************************************/
+
+struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number)
+{
+       struct acpi_gpe_xrupt_info *next_gpe_xrupt;
+       struct acpi_gpe_xrupt_info *gpe_xrupt;
+       acpi_status status;
+       acpi_cpu_flags flags;
+
+       ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
+
+       /* No need for lock since we are not changing any list elements here */
+
+       next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
+       while (next_gpe_xrupt) {
+               if (next_gpe_xrupt->interrupt_number == interrupt_number) {
+                       return_PTR(next_gpe_xrupt);
+               }
+
+               next_gpe_xrupt = next_gpe_xrupt->next;
+       }
+
+       /* Not found, must allocate a new xrupt descriptor */
+
+       gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
+       if (!gpe_xrupt) {
+               return_PTR(NULL);
+       }
+
+       gpe_xrupt->interrupt_number = interrupt_number;
+
+       /* Install new interrupt descriptor with spin lock */
+
+       flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+       if (acpi_gbl_gpe_xrupt_list_head) {
+               next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
+               while (next_gpe_xrupt->next) {
+                       next_gpe_xrupt = next_gpe_xrupt->next;
+               }
+
+               next_gpe_xrupt->next = gpe_xrupt;
+               gpe_xrupt->previous = next_gpe_xrupt;
+       } else {
+               acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
+       }
+       acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+       /* Install new interrupt handler if not SCI_INT */
+
+       if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
+               status = acpi_os_install_interrupt_handler(interrupt_number,
+                                                          acpi_ev_gpe_xrupt_handler,
+                                                          gpe_xrupt);
+               if (ACPI_FAILURE(status)) {
+                       ACPI_ERROR((AE_INFO,
+                                   "Could not install GPE interrupt handler at level 0x%X",
+                                   interrupt_number));
+                       return_PTR(NULL);
+               }
+       }
+
+       return_PTR(gpe_xrupt);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_delete_gpe_xrupt
+ *
+ * PARAMETERS:  gpe_xrupt       - A GPE interrupt info block
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
+ *              interrupt handler if not the SCI interrupt.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
+{
+       acpi_status status;
+       acpi_cpu_flags flags;
+
+       ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
+
+       /* We never want to remove the SCI interrupt handler */
+
+       if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
+               gpe_xrupt->gpe_block_list_head = NULL;
+               return_ACPI_STATUS(AE_OK);
+       }
+
+       /* Disable this interrupt */
+
+       status =
+           acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
+                                            acpi_ev_gpe_xrupt_handler);
+       if (ACPI_FAILURE(status)) {
+               return_ACPI_STATUS(status);
+       }
+
+       /* Unlink the interrupt block with lock */
+
+       flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+       if (gpe_xrupt->previous) {
+               gpe_xrupt->previous->next = gpe_xrupt->next;
+       } else {
+               /* No previous, update list head */
+
+               acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
+       }
+
+       if (gpe_xrupt->next) {
+               gpe_xrupt->next->previous = gpe_xrupt->previous;
+       }
+       acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+       /* Free the block */
+
+       ACPI_FREE(gpe_xrupt);
+       return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_delete_gpe_handlers
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
+ *              Used only prior to termination.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
+                           struct acpi_gpe_block_info *gpe_block,
+                           void *context)
+{
+       struct acpi_gpe_event_info *gpe_event_info;
+       u32 i;
+       u32 j;
+
+       ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
+
+       /* Examine each GPE Register within the block */
+
+       for (i = 0; i < gpe_block->register_count; i++) {
+
+               /* Now look at the individual GPEs in this byte register */
+
+               for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
+                       gpe_event_info = &gpe_block->event_info[((acpi_size) i *
+                                                                ACPI_GPE_REGISTER_WIDTH)
+                                                               + j];
+
+                       if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+                           ACPI_GPE_DISPATCH_HANDLER) {
+                               ACPI_FREE(gpe_event_info->dispatch.handler);
+                               gpe_event_info->dispatch.handler = NULL;
+                               gpe_event_info->flags &=
+                                   ~ACPI_GPE_DISPATCH_MASK;
+                       }
+               }
+       }
+
+       return_ACPI_STATUS(AE_OK);
+}