Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

drivers/acpi/events/Makefile

@@ -0,0 +1,9 @@
+#
+# Makefile for all Linux ACPI interpreter subdirectories
+#
+
+obj-y := evevent.o  evregion.o  evsci.o    evxfevnt.o \
+	 evmisc.o   evrgnini.o  evxface.o  evxfregn.o \
+	 evgpe.o    evgpeblk.o
+
+EXTRA_CFLAGS += $(ACPI_CFLAGS)

drivers/acpi/events/evevent.c

@@ -0,0 +1,297 @@
+/******************************************************************************
+ *
+ * Module Name: evevent - Fixed Event handling and dispatch
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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 <acpi/acevents.h>
+
+#define _COMPONENT          ACPI_EVENTS
+	 ACPI_MODULE_NAME    ("evevent")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_initialize_events
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize global data structures for events.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_initialize_events (
+	void)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ev_initialize_events");
+
+
+	/* Make sure we have ACPI tables */
+
+	if (!acpi_gbl_DSDT) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No ACPI tables present!\n"));
+		return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+	}
+
+	/*
+	 * Initialize the Fixed and General Purpose Events. This is
+	 * done prior to enabling SCIs to prevent interrupts from
+	 * occurring before handers are installed.
+	 */
+	status = acpi_ev_fixed_event_initialize ();
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR ((
+				"Unable to initialize fixed events, %s\n",
+				acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_ev_gpe_initialize ();
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR ((
+				"Unable to initialize general purpose events, %s\n",
+				acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_xrupt_handlers
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_install_xrupt_handlers (
+	void)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ev_install_xrupt_handlers");
+
+
+	/* Install the SCI handler */
+
+	status = acpi_ev_install_sci_handler ();
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR ((
+				"Unable to install System Control Interrupt Handler, %s\n",
+				acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	/* Install the handler for the Global Lock */
+
+	status = acpi_ev_init_global_lock_handler ();
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR ((
+				"Unable to initialize Global Lock handler, %s\n",
+				acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	acpi_gbl_events_initialized = TRUE;
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_fixed_event_initialize
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install the fixed event handlers and enable the fixed events.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_fixed_event_initialize (
+	void)
+{
+	acpi_native_uint                i;
+	acpi_status                     status;
+
+
+	/*
+	 * Initialize the structure that keeps track of fixed event handlers
+	 * and enable the fixed events.
+	 */
+	for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
+		acpi_gbl_fixed_event_handlers[i].handler = NULL;
+		acpi_gbl_fixed_event_handlers[i].context = NULL;
+
+		/* Enable the fixed event */
+
+		if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) {
+			status = acpi_set_register (acpi_gbl_fixed_event_info[i].enable_register_id,
+					 0, ACPI_MTX_LOCK);
+			if (ACPI_FAILURE (status)) {
+				return (status);
+			}
+		}
+	}
+
+	return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_fixed_event_detect
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
+ *
+ * DESCRIPTION: Checks the PM status register for fixed events
+ *
+ ******************************************************************************/
+
+u32
+acpi_ev_fixed_event_detect (
+	void)
+{
+	u32                             int_status = ACPI_INTERRUPT_NOT_HANDLED;
+	u32                             fixed_status;
+	u32                             fixed_enable;
+	acpi_native_uint                i;
+
+
+	ACPI_FUNCTION_NAME ("ev_fixed_event_detect");
+
+
+	/*
+	 * Read the fixed feature status and enable registers, as all the cases
+	 * depend on their values.  Ignore errors here.
+	 */
+	(void) acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS, &fixed_status);
+	(void) acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_ENABLE, &fixed_enable);
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
+		"Fixed Event Block: Enable %08X Status %08X\n",
+		fixed_enable, fixed_status));
+
+	/*
+	 * Check for all possible Fixed Events and dispatch those that are active
+	 */
+	for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
+		/* Both the status and enable bits must be on for this event */
+
+		if ((fixed_status & acpi_gbl_fixed_event_info[i].status_bit_mask) &&
+			(fixed_enable & acpi_gbl_fixed_event_info[i].enable_bit_mask)) {
+			/* Found an active (signalled) event */
+
+			int_status |= acpi_ev_fixed_event_dispatch ((u32) i);
+		}
+	}
+
+	return (int_status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_fixed_event_dispatch
+ *
+ * PARAMETERS:  Event               - Event type
+ *
+ * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
+ *
+ * DESCRIPTION: Clears the status bit for the requested event, calls the
+ *              handler that previously registered for the event.
+ *
+ ******************************************************************************/
+
+u32
+acpi_ev_fixed_event_dispatch (
+	u32                             event)
+{
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	/* Clear the status bit */
+
+	(void) acpi_set_register (acpi_gbl_fixed_event_info[event].status_register_id,
+			 1, ACPI_MTX_DO_NOT_LOCK);
+
+	/*
+	 * Make sure we've got a handler.  If not, report an error.
+	 * The event is disabled to prevent further interrupts.
+	 */
+	if (NULL == acpi_gbl_fixed_event_handlers[event].handler) {
+		(void) acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
+				0, ACPI_MTX_DO_NOT_LOCK);
+
+		ACPI_REPORT_ERROR (
+			("No installed handler for fixed event [%08X]\n",
+			event));
+
+		return (ACPI_INTERRUPT_NOT_HANDLED);
+	}
+
+	/* Invoke the Fixed Event handler */
+
+	return ((acpi_gbl_fixed_event_handlers[event].handler)(
+			  acpi_gbl_fixed_event_handlers[event].context));
+}
+
+

drivers/acpi/events/evgpe.c

@@ -0,0 +1,756 @@
+/******************************************************************************
+ *
+ * Module Name: evgpe - General Purpose Event handling and dispatch
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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 <acpi/acevents.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT          ACPI_EVENTS
+	 ACPI_MODULE_NAME    ("evgpe")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_set_gpe_type
+ *
+ * PARAMETERS:  gpe_event_info          - GPE to set
+ *              Type                    - New type
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_set_gpe_type (
+	struct acpi_gpe_event_info      *gpe_event_info,
+	u8                              type)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ev_set_gpe_type");
+
+
+	/* Validate type and update register enable masks */
+
+	switch (type) {
+	case ACPI_GPE_TYPE_WAKE:
+	case ACPI_GPE_TYPE_RUNTIME:
+	case ACPI_GPE_TYPE_WAKE_RUN:
+		break;
+
+	default:
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/* Disable the GPE if currently enabled */
+
+	status = acpi_ev_disable_gpe (gpe_event_info);
+
+	/* Type was validated above */
+
+	gpe_event_info->flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */
+	gpe_event_info->flags |= type;              /* Insert type */
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_update_gpe_enable_masks
+ *
+ * PARAMETERS:  gpe_event_info          - GPE to update
+ *              Type                    - What to do: ACPI_GPE_DISABLE or
+ *                                        ACPI_GPE_ENABLE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Updates GPE register enable masks based on the GPE type
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_update_gpe_enable_masks (
+	struct acpi_gpe_event_info      *gpe_event_info,
+	u8                              type)
+{
+	struct acpi_gpe_register_info   *gpe_register_info;
+	u8                              register_bit;
+
+
+	ACPI_FUNCTION_TRACE ("ev_update_gpe_enable_masks");
+
+
+	gpe_register_info = gpe_event_info->register_info;
+	if (!gpe_register_info) {
+		return_ACPI_STATUS (AE_NOT_EXIST);
+	}
+	register_bit = gpe_event_info->register_bit;
+
+	/* 1) Disable case.  Simply clear all enable bits */
+
+	if (type == ACPI_GPE_DISABLE) {
+		ACPI_CLEAR_BIT (gpe_register_info->enable_for_wake, register_bit);
+		ACPI_CLEAR_BIT (gpe_register_info->enable_for_run, register_bit);
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/* 2) Enable case.  Set/Clear the appropriate enable bits */
+
+	switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
+	case ACPI_GPE_TYPE_WAKE:
+		ACPI_SET_BIT   (gpe_register_info->enable_for_wake, register_bit);
+		ACPI_CLEAR_BIT (gpe_register_info->enable_for_run, register_bit);
+		break;
+
+	case ACPI_GPE_TYPE_RUNTIME:
+		ACPI_CLEAR_BIT (gpe_register_info->enable_for_wake, register_bit);
+		ACPI_SET_BIT   (gpe_register_info->enable_for_run, register_bit);
+		break;
+
+	case ACPI_GPE_TYPE_WAKE_RUN:
+		ACPI_SET_BIT   (gpe_register_info->enable_for_wake, register_bit);
+		ACPI_SET_BIT   (gpe_register_info->enable_for_run, register_bit);
+		break;
+
+	default:
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_enable_gpe
+ *
+ * PARAMETERS:  gpe_event_info          - GPE to enable
+ *              write_to_hardware       - Enable now, or just mark data structs
+ *                                        (WAKE GPEs should be deferred)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable a GPE based on the GPE type
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_enable_gpe (
+	struct acpi_gpe_event_info      *gpe_event_info,
+	u8                              write_to_hardware)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ev_enable_gpe");
+
+
+	/* Make sure HW enable masks are updated */
+
+	status = acpi_ev_update_gpe_enable_masks (gpe_event_info, ACPI_GPE_ENABLE);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Mark wake-enabled or HW enable, or both */
+
+	switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
+	case ACPI_GPE_TYPE_WAKE:
+
+		ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
+		break;
+
+	case ACPI_GPE_TYPE_WAKE_RUN:
+
+		ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
+
+		/*lint -fallthrough */
+
+	case ACPI_GPE_TYPE_RUNTIME:
+
+		ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
+
+		if (write_to_hardware) {
+			/* Clear the GPE (of stale events), then enable it */
+
+			status = acpi_hw_clear_gpe (gpe_event_info);
+			if (ACPI_FAILURE (status)) {
+				return_ACPI_STATUS (status);
+			}
+
+			/* Enable the requested runtime GPE */
+
+			status = acpi_hw_write_gpe_enable_reg (gpe_event_info);
+		}
+		break;
+
+	default:
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_disable_gpe
+ *
+ * PARAMETERS:  gpe_event_info          - GPE to disable
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable a GPE based on the GPE type
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_disable_gpe (
+	struct acpi_gpe_event_info      *gpe_event_info)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ev_disable_gpe");
+
+
+	if (!(gpe_event_info->flags & ACPI_GPE_ENABLE_MASK)) {
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/* Make sure HW enable masks are updated */
+
+	status = acpi_ev_update_gpe_enable_masks (gpe_event_info, ACPI_GPE_DISABLE);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Mark wake-disabled or HW disable, or both */
+
+	switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
+	case ACPI_GPE_TYPE_WAKE:
+		ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
+		break;
+
+	case ACPI_GPE_TYPE_WAKE_RUN:
+		ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
+
+		/*lint -fallthrough */
+
+	case ACPI_GPE_TYPE_RUNTIME:
+
+		/* Disable the requested runtime GPE */
+
+		ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
+		status = acpi_hw_write_gpe_enable_reg (gpe_event_info);
+		break;
+
+	default:
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_get_gpe_event_info
+ *
+ * PARAMETERS:  gpe_device          - Device node.  NULL for GPE0/GPE1
+ *              gpe_number          - Raw GPE number
+ *
+ * RETURN:      A GPE event_info struct. NULL if not a valid GPE
+ *
+ * DESCRIPTION: Returns the event_info struct associated with this GPE.
+ *              Validates the gpe_block and the gpe_number
+ *
+ *              Should be called only when the GPE lists are semaphore locked
+ *              and not subject to change.
+ *
+ ******************************************************************************/
+
+struct acpi_gpe_event_info *
+acpi_ev_get_gpe_event_info (
+	acpi_handle                     gpe_device,
+	u32                             gpe_number)
+{
+	union acpi_operand_object       *obj_desc;
+	struct acpi_gpe_block_info      *gpe_block;
+	acpi_native_uint                i;
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	/* A NULL gpe_block means use the FADT-defined GPE block(s) */
+
+	if (!gpe_device) {
+		/* Examine GPE Block 0 and 1 (These blocks are permanent) */
+
+		for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) {
+			gpe_block = acpi_gbl_gpe_fadt_blocks[i];
+			if (gpe_block) {
+				if ((gpe_number >= gpe_block->block_base_number) &&
+					(gpe_number < gpe_block->block_base_number + (gpe_block->register_count * 8))) {
+					return (&gpe_block->event_info[gpe_number - gpe_block->block_base_number]);
+				}
+			}
+		}
+
+		/* The gpe_number was not in the range of either FADT GPE block */
+
+		return (NULL);
+	}
+
+	/* A Non-NULL gpe_device means this is a GPE Block Device */
+
+	obj_desc = acpi_ns_get_attached_object ((struct acpi_namespace_node *) gpe_device);
+	if (!obj_desc ||
+		!obj_desc->device.gpe_block) {
+		return (NULL);
+	}
+
+	gpe_block = obj_desc->device.gpe_block;
+
+	if ((gpe_number >= gpe_block->block_base_number) &&
+		(gpe_number < gpe_block->block_base_number + (gpe_block->register_count * 8))) {
+		return (&gpe_block->event_info[gpe_number - gpe_block->block_base_number]);
+	}
+
+	return (NULL);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_gpe_detect
+ *
+ * PARAMETERS:  gpe_xrupt_list      - Interrupt block for this interrupt.
+ *                                    Can have multiple GPE blocks attached.
+ *
+ * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
+ *
+ * DESCRIPTION: Detect if any GP events have occurred.  This function is
+ *              executed at interrupt level.
+ *
+ ******************************************************************************/
+
+u32
+acpi_ev_gpe_detect (
+	struct acpi_gpe_xrupt_info      *gpe_xrupt_list)
+{
+	u32                             int_status = ACPI_INTERRUPT_NOT_HANDLED;
+	u8                              enabled_status_byte;
+	struct acpi_gpe_register_info   *gpe_register_info;
+	u32                             status_reg;
+	u32                             enable_reg;
+	acpi_status                     status;
+	struct acpi_gpe_block_info      *gpe_block;
+	acpi_native_uint                i;
+	acpi_native_uint                j;
+
+
+	ACPI_FUNCTION_NAME ("ev_gpe_detect");
+
+	/* Check for the case where there are no GPEs */
+
+	if (!gpe_xrupt_list) {
+		return (int_status);
+	}
+
+	/* Examine all GPE blocks attached to this interrupt level */
+
+	acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_ISR);
+	gpe_block = gpe_xrupt_list->gpe_block_list_head;
+	while (gpe_block) {
+		/*
+		 * Read all of the 8-bit GPE status and enable registers
+		 * in this GPE block, saving all of them.
+		 * Find all currently active GP events.
+		 */
+		for (i = 0; i < gpe_block->register_count; i++) {
+			/* Get the next status/enable pair */
+
+			gpe_register_info = &gpe_block->register_info[i];
+
+			/* Read the Status Register */
+
+			status = acpi_hw_low_level_read (ACPI_GPE_REGISTER_WIDTH, &status_reg,
+					 &gpe_register_info->status_address);
+			if (ACPI_FAILURE (status)) {
+				goto unlock_and_exit;
+			}
+
+			/* Read the Enable Register */
+
+			status = acpi_hw_low_level_read (ACPI_GPE_REGISTER_WIDTH, &enable_reg,
+					 &gpe_register_info->enable_address);
+			if (ACPI_FAILURE (status)) {
+				goto unlock_and_exit;
+			}
+
+			ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
+				"Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n",
+				gpe_register_info->base_gpe_number, status_reg, enable_reg));
+
+			/* First check if there is anything active at all in this register */
+
+			enabled_status_byte = (u8) (status_reg & enable_reg);
+			if (!enabled_status_byte) {
+				/* No active GPEs in this register, move on */
+
+				continue;
+			}
+
+			/* Now look at the individual GPEs in this byte register */
+
+			for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
+				/* Examine one GPE bit */
+
+				if (enabled_status_byte & acpi_gbl_decode_to8bit[j]) {
+					/*
+					 * Found an active GPE. Dispatch the event to a handler
+					 * or method.
+					 */
+					int_status |= acpi_ev_gpe_dispatch (
+							  &gpe_block->event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j],
+							  (u32) j + gpe_register_info->base_gpe_number);
+				}
+			}
+		}
+
+		gpe_block = gpe_block->next;
+	}
+
+unlock_and_exit:
+
+	acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_ISR);
+	return (int_status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_asynch_execute_gpe_method
+ *
+ * PARAMETERS:  Context (gpe_event_info) - Info for this GPE
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Perform the actual execution of a GPE control method.  This
+ *              function is called from an invocation of acpi_os_queue_for_execution
+ *              (and therefore does NOT execute at interrupt level) so that
+ *              the control method itself is not executed in the context of
+ *              an interrupt handler.
+ *
+ ******************************************************************************/
+
+static void ACPI_SYSTEM_XFACE
+acpi_ev_asynch_execute_gpe_method (
+	void                            *context)
+{
+	struct acpi_gpe_event_info      *gpe_event_info = (void *) context;
+	u32                             gpe_number = 0;
+	acpi_status                     status;
+	struct acpi_gpe_event_info      local_gpe_event_info;
+	struct acpi_parameter_info      info;
+
+
+	ACPI_FUNCTION_TRACE ("ev_asynch_execute_gpe_method");
+
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE (status)) {
+		return_VOID;
+	}
+
+	/* Must revalidate the gpe_number/gpe_block */
+
+	if (!acpi_ev_valid_gpe_event (gpe_event_info)) {
+		status = acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+		return_VOID;
+	}
+
+	/* Set the GPE flags for return to enabled state */
+
+	(void) acpi_ev_enable_gpe (gpe_event_info, FALSE);
+
+	/*
+	 * Take a snapshot of the GPE info for this level - we copy the
+	 * info to prevent a race condition with remove_handler/remove_block.
+	 */
+	ACPI_MEMCPY (&local_gpe_event_info, gpe_event_info, sizeof (struct acpi_gpe_event_info));
+
+	status = acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE (status)) {
+		return_VOID;
+	}
+
+	/*
+	 * Must check for control method type dispatch one more
+	 * time to avoid race with ev_gpe_install_handler
+	 */
+	if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_METHOD) {
+		/*
+		 * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx
+		 * control method that corresponds to this GPE
+		 */
+		info.node = local_gpe_event_info.dispatch.method_node;
+		info.parameters = ACPI_CAST_PTR (union acpi_operand_object *, gpe_event_info);
+		info.parameter_type = ACPI_PARAM_GPE;
+
+		status = acpi_ns_evaluate_by_handle (&info);
+		if (ACPI_FAILURE (status)) {
+			ACPI_REPORT_ERROR ((
+				"%s while evaluating method [%4.4s] for GPE[%2X]\n",
+				acpi_format_exception (status),
+				acpi_ut_get_node_name (local_gpe_event_info.dispatch.method_node),
+				gpe_number));
+		}
+	}
+
+	if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_LEVEL_TRIGGERED) {
+		/*
+		 * GPE is level-triggered, we clear the GPE status bit after
+		 * handling the event.
+		 */
+		status = acpi_hw_clear_gpe (&local_gpe_event_info);
+		if (ACPI_FAILURE (status)) {
+			return_VOID;
+		}
+	}
+
+	/* Enable this GPE */
+
+	(void) acpi_hw_write_gpe_enable_reg (&local_gpe_event_info);
+	return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_gpe_dispatch
+ *
+ * PARAMETERS:  gpe_event_info  - info for this GPE
+ *              gpe_number      - Number relative to the parent GPE block
+ *
+ * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
+ *
+ * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
+ *              or method (e.g. _Lxx/_Exx) handler.
+ *
+ *              This function executes at interrupt level.
+ *
+ ******************************************************************************/
+
+u32
+acpi_ev_gpe_dispatch (
+	struct acpi_gpe_event_info      *gpe_event_info,
+	u32                             gpe_number)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ev_gpe_dispatch");
+
+
+	/*
+	 * If edge-triggered, clear the GPE status bit now.  Note that
+	 * level-triggered events are cleared after the GPE is serviced.
+	 */
+	if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_EDGE_TRIGGERED) {
+		status = acpi_hw_clear_gpe (gpe_event_info);
+		if (ACPI_FAILURE (status)) {
+			ACPI_REPORT_ERROR (("acpi_ev_gpe_dispatch: %s, Unable to clear GPE[%2X]\n",
+				acpi_format_exception (status), gpe_number));
+			return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
+		}
+	}
+
+	/* Save current system state */
+
+	if (acpi_gbl_system_awake_and_running) {
+		ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING);
+	}
+	else {
+		ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING);
+	}
+
+	/*
+	 * Dispatch the GPE to either an installed handler, or the control
+	 * method associated with this GPE (_Lxx or _Exx).
+	 * If a handler exists, we invoke it and do not attempt to run the method.
+	 * If there is neither a handler nor a method, we disable the level to
+	 * prevent further events from coming in here.
+	 */
+	switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
+	case ACPI_GPE_DISPATCH_HANDLER:
+
+		/*
+		 * Invoke the installed handler (at interrupt level)
+		 * Ignore return status for now.  TBD: leave GPE disabled on error?
+		 */
+		(void) gpe_event_info->dispatch.handler->address (
+				  gpe_event_info->dispatch.handler->context);
+
+		/* It is now safe to clear level-triggered events. */
+
+		if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_LEVEL_TRIGGERED) {
+			status = acpi_hw_clear_gpe (gpe_event_info);
+			if (ACPI_FAILURE (status)) {
+				ACPI_REPORT_ERROR ((
+					"acpi_ev_gpe_dispatch: %s, Unable to clear GPE[%2X]\n",
+					acpi_format_exception (status), gpe_number));
+				return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
+			}
+		}
+		break;
+
+	case ACPI_GPE_DISPATCH_METHOD:
+
+		/*
+		 * Disable GPE, so it doesn't keep firing before the method has a
+		 * chance to run.
+		 */
+		status = acpi_ev_disable_gpe (gpe_event_info);
+		if (ACPI_FAILURE (status)) {
+			ACPI_REPORT_ERROR ((
+				"acpi_ev_gpe_dispatch: %s, Unable to disable GPE[%2X]\n",
+				acpi_format_exception (status), gpe_number));
+			return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
+		}
+
+		/*
+		 * Execute the method associated with the GPE
+		 * NOTE: Level-triggered GPEs are cleared after the method completes.
+		 */
+		status = acpi_os_queue_for_execution (OSD_PRIORITY_GPE,
+				 acpi_ev_asynch_execute_gpe_method, gpe_event_info);
+		if (ACPI_FAILURE (status)) {
+			ACPI_REPORT_ERROR ((
+				"acpi_ev_gpe_dispatch: %s, Unable to queue handler for GPE[%2X] - event disabled\n",
+				acpi_format_exception (status), gpe_number));
+		}
+		break;
+
+	default:
+
+		/* No handler or method to run! */
+
+		ACPI_REPORT_ERROR ((
+			"acpi_ev_gpe_dispatch: No handler or method for GPE[%2X], disabling event\n",
+			gpe_number));
+
+		/*
+		 * Disable the GPE.  The GPE will remain disabled until the ACPI
+		 * Core Subsystem is restarted, or a handler is installed.
+		 */
+		status = acpi_ev_disable_gpe (gpe_event_info);
+		if (ACPI_FAILURE (status)) {
+			ACPI_REPORT_ERROR ((
+				"acpi_ev_gpe_dispatch: %s, Unable to disable GPE[%2X]\n",
+				acpi_format_exception (status), gpe_number));
+			return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
+		}
+		break;
+	}
+
+	return_VALUE (ACPI_INTERRUPT_HANDLED);
+}
+
+
+#ifdef ACPI_GPE_NOTIFY_CHECK
+
+/*******************************************************************************
+ * TBD: NOT USED, PROTOTYPE ONLY AND WILL PROBABLY BE REMOVED
+ *
+ * FUNCTION:    acpi_ev_check_for_wake_only_gpe
+ *
+ * PARAMETERS:  gpe_event_info  - info for this GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Determine if a a GPE is "wake-only".
+ *
+ *              Called from Notify() code in interpreter when a "device_wake"
+ *              Notify comes in.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_check_for_wake_only_gpe (
+	struct acpi_gpe_event_info      *gpe_event_info)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ev_check_for_wake_only_gpe");
+
+
+	if ((gpe_event_info) &&  /* Only >0 for _Lxx/_Exx */
+	   ((gpe_event_info->flags & ACPI_GPE_SYSTEM_MASK) == ACPI_GPE_SYSTEM_RUNNING)) /* System state at GPE time */ {
+		/* This must be a wake-only GPE, disable it */
+
+		status = acpi_ev_disable_gpe (gpe_event_info);
+
+		/* Set GPE to wake-only.  Do not change wake disabled/enabled status */
+
+		acpi_ev_set_gpe_type (gpe_event_info, ACPI_GPE_TYPE_WAKE);
+
+		ACPI_REPORT_INFO (("GPE %p was updated from wake/run to wake-only\n",
+				gpe_event_info));
+
+		/* This was a wake-only GPE */
+
+		return_ACPI_STATUS (AE_WAKE_ONLY_GPE);
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+#endif
+
+

drivers/acpi/events/evmisc.c

@@ -0,0 +1,588 @@
+/******************************************************************************
+ *
+ * Module Name: evmisc - Miscellaneous event manager support functions
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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 <acpi/acevents.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acinterp.h>
+
+#define _COMPONENT          ACPI_EVENTS
+	 ACPI_MODULE_NAME    ("evmisc")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_is_notify_object
+ *
+ * PARAMETERS:  Node            - Node to check
+ *
+ * RETURN:      TRUE if notifies allowed on this object
+ *
+ * DESCRIPTION: Check type of node for a object that supports notifies.
+ *
+ *              TBD: This could be replaced by a flag bit in the node.
+ *
+ ******************************************************************************/
+
+u8
+acpi_ev_is_notify_object (
+	struct acpi_namespace_node      *node)
+{
+	switch (node->type) {
+	case ACPI_TYPE_DEVICE:
+	case ACPI_TYPE_PROCESSOR:
+	case ACPI_TYPE_POWER:
+	case ACPI_TYPE_THERMAL:
+		/*
+		 * These are the ONLY objects that can receive ACPI notifications
+		 */
+		return (TRUE);
+
+	default:
+		return (FALSE);
+	}
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_queue_notify_request
+ *
+ * PARAMETERS:  Node            - NS node for the notified object
+ *              notify_value    - Value from the Notify() request
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Dispatch a device notification event to a previously
+ *              installed handler.
+ *
+ ******************************************************************************/
+
+#ifdef ACPI_DEBUG_OUTPUT
+static const char                *acpi_notify_value_names[] =
+{
+	"Bus Check",
+	"Device Check",
+	"Device Wake",
+	"Eject request",
+	"Device Check Light",
+	"Frequency Mismatch",
+	"Bus Mode Mismatch",
+	"Power Fault"
+};
+#endif
+
+acpi_status
+acpi_ev_queue_notify_request (
+	struct acpi_namespace_node      *node,
+	u32                             notify_value)
+{
+	union acpi_operand_object       *obj_desc;
+	union acpi_operand_object       *handler_obj = NULL;
+	union acpi_generic_state        *notify_info;
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_NAME ("ev_queue_notify_request");
+
+
+	/*
+	 * For value 3 (Ejection Request), some device method may need to be run.
+	 * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need to be run.
+	 * For value 0x80 (Status Change) on the power button or sleep button,
+	 * initiate soft-off or sleep operation?
+	 */
+	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+		"Dispatching Notify(%X) on node %p\n", notify_value, node));
+
+	if (notify_value <= 7) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: %s\n",
+				acpi_notify_value_names[notify_value]));
+	}
+	else {
+		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: 0x%2.2X **Device Specific**\n",
+				notify_value));
+	}
+
+	/* Get the notify object attached to the NS Node */
+
+	obj_desc = acpi_ns_get_attached_object (node);
+	if (obj_desc) {
+		/* We have the notify object, Get the right handler */
+
+		switch (node->type) {
+		case ACPI_TYPE_DEVICE:
+		case ACPI_TYPE_THERMAL:
+		case ACPI_TYPE_PROCESSOR:
+		case ACPI_TYPE_POWER:
+
+			if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
+				handler_obj = obj_desc->common_notify.system_notify;
+			}
+			else {
+				handler_obj = obj_desc->common_notify.device_notify;
+			}
+			break;
+
+		default:
+			/* All other types are not supported */
+			return (AE_TYPE);
+		}
+	}
+
+	/* If there is any handler to run, schedule the dispatcher */
+
+	if ((acpi_gbl_system_notify.handler && (notify_value <= ACPI_MAX_SYS_NOTIFY)) ||
+		(acpi_gbl_device_notify.handler && (notify_value > ACPI_MAX_SYS_NOTIFY)) ||
+		handler_obj) {
+		notify_info = acpi_ut_create_generic_state ();
+		if (!notify_info) {
+			return (AE_NO_MEMORY);
+		}
+
+		notify_info->common.data_type = ACPI_DESC_TYPE_STATE_NOTIFY;
+		notify_info->notify.node      = node;
+		notify_info->notify.value     = (u16) notify_value;
+		notify_info->notify.handler_obj = handler_obj;
+
+		status = acpi_os_queue_for_execution (OSD_PRIORITY_HIGH,
+				  acpi_ev_notify_dispatch, notify_info);
+		if (ACPI_FAILURE (status)) {
+			acpi_ut_delete_generic_state (notify_info);
+		}
+	}
+
+	if (!handler_obj) {
+		/*
+		 * There is no per-device notify handler for this device.
+		 * This may or may not be a problem.
+		 */
+		ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+			"No notify handler for Notify(%4.4s, %X) node %p\n",
+			acpi_ut_get_node_name (node), notify_value, node));
+	}
+
+	return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_notify_dispatch
+ *
+ * PARAMETERS:  Context         - To be passsed to the notify handler
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Dispatch a device notification event to a previously
+ *              installed handler.
+ *
+ ******************************************************************************/
+
+void ACPI_SYSTEM_XFACE
+acpi_ev_notify_dispatch (
+	void                            *context)
+{
+	union acpi_generic_state        *notify_info = (union acpi_generic_state *) context;
+	acpi_notify_handler             global_handler = NULL;
+	void                            *global_context = NULL;
+	union acpi_operand_object       *handler_obj;
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	/*
+	 * We will invoke a global notify handler if installed.
+	 * This is done _before_ we invoke the per-device handler attached to the device.
+	 */
+	if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) {
+		/* Global system notification handler */
+
+		if (acpi_gbl_system_notify.handler) {
+			global_handler = acpi_gbl_system_notify.handler;
+			global_context = acpi_gbl_system_notify.context;
+		}
+	}
+	else {
+		/* Global driver notification handler */
+
+		if (acpi_gbl_device_notify.handler) {
+			global_handler = acpi_gbl_device_notify.handler;
+			global_context = acpi_gbl_device_notify.context;
+		}
+	}
+
+	/* Invoke the system handler first, if present */
+
+	if (global_handler) {
+		global_handler (notify_info->notify.node, notify_info->notify.value, global_context);
+	}
+
+	/* Now invoke the per-device handler, if present */
+
+	handler_obj = notify_info->notify.handler_obj;
+	if (handler_obj) {
+		handler_obj->notify.handler (notify_info->notify.node, notify_info->notify.value,
+				  handler_obj->notify.context);
+	}
+
+	/* All done with the info object */
+
+	acpi_ut_delete_generic_state (notify_info);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_global_lock_thread
+ *
+ * PARAMETERS:  Context         - From thread interface, not used
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the
+ *              Global Lock.  Simply signal all threads that are waiting
+ *              for the lock.
+ *
+ ******************************************************************************/
+
+static void ACPI_SYSTEM_XFACE
+acpi_ev_global_lock_thread (
+	void                            *context)
+{
+	acpi_status                     status;
+
+
+	/* Signal threads that are waiting for the lock */
+
+	if (acpi_gbl_global_lock_thread_count) {
+		/* Send sufficient units to the semaphore */
+
+		status = acpi_os_signal_semaphore (acpi_gbl_global_lock_semaphore,
+				 acpi_gbl_global_lock_thread_count);
+		if (ACPI_FAILURE (status)) {
+			ACPI_REPORT_ERROR (("Could not signal Global Lock semaphore\n"));
+		}
+	}
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_global_lock_handler
+ *
+ * PARAMETERS:  Context         - From thread interface, not used
+ *
+ * RETURN:      ACPI_INTERRUPT_HANDLED or ACPI_INTERRUPT_NOT_HANDLED
+ *
+ * DESCRIPTION: Invoked directly from the SCI handler when a global lock
+ *              release interrupt occurs.  Grab the global lock and queue
+ *              the global lock thread for execution
+ *
+ ******************************************************************************/
+
+static u32
+acpi_ev_global_lock_handler (
+	void                            *context)
+{
+	u8                              acquired = FALSE;
+	acpi_status                     status;
+
+
+	/*
+	 * Attempt to get the lock
+	 * If we don't get it now, it will be marked pending and we will
+	 * take another interrupt when it becomes free.
+	 */
+	ACPI_ACQUIRE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, acquired);
+	if (acquired) {
+		/* Got the lock, now wake all threads waiting for it */
+
+		acpi_gbl_global_lock_acquired = TRUE;
+
+		/* Run the Global Lock thread which will signal all waiting threads */
+
+		status = acpi_os_queue_for_execution (OSD_PRIORITY_HIGH,
+				  acpi_ev_global_lock_thread, context);
+		if (ACPI_FAILURE (status)) {
+			ACPI_REPORT_ERROR (("Could not queue Global Lock thread, %s\n",
+				acpi_format_exception (status)));
+
+			return (ACPI_INTERRUPT_NOT_HANDLED);
+		}
+	}
+
+	return (ACPI_INTERRUPT_HANDLED);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_init_global_lock_handler
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for the global lock release event
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_init_global_lock_handler (void)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ev_init_global_lock_handler");
+
+
+	acpi_gbl_global_lock_present = TRUE;
+	status = acpi_install_fixed_event_handler (ACPI_EVENT_GLOBAL,
+			  acpi_ev_global_lock_handler, NULL);
+
+	/*
+	 * If the global lock does not exist on this platform, the attempt
+	 * to enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick)
+	 * Map to AE_OK, but mark global lock as not present.
+	 * Any attempt to actually use the global lock will be flagged
+	 * with an error.
+	 */
+	if (status == AE_NO_HARDWARE_RESPONSE) {
+		acpi_gbl_global_lock_present = FALSE;
+		status = AE_OK;
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_acquire_global_lock
+ *
+ * PARAMETERS:  Timeout         - Max time to wait for the lock, in millisec.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Attempt to gain ownership of the Global Lock.
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_ev_acquire_global_lock (
+	u16                             timeout)
+{
+	acpi_status                     status = AE_OK;
+	u8                              acquired = FALSE;
+
+
+	ACPI_FUNCTION_TRACE ("ev_acquire_global_lock");
+
+
+#ifndef ACPI_APPLICATION
+	/* Make sure that we actually have a global lock */
+
+	if (!acpi_gbl_global_lock_present) {
+		return_ACPI_STATUS (AE_NO_GLOBAL_LOCK);
+	}
+#endif
+
+	/* One more thread wants the global lock */
+
+	acpi_gbl_global_lock_thread_count++;
+
+	/* If we (OS side vs. BIOS side) have the hardware lock already, we are done */
+
+	if (acpi_gbl_global_lock_acquired) {
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/* We must acquire the actual hardware lock */
+
+	ACPI_ACQUIRE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, acquired);
+	if (acquired) {
+	   /* We got the lock */
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Acquired the HW Global Lock\n"));
+
+		acpi_gbl_global_lock_acquired = TRUE;
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/*
+	 * Did not get the lock.  The pending bit was set above, and we must now
+	 * wait until we get the global lock released interrupt.
+	 */
+	ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Waiting for the HW Global Lock\n"));
+
+	/*
+	 * Acquire the global lock semaphore first.
+	 * Since this wait will block, we must release the interpreter
+	 */
+	status = acpi_ex_system_wait_semaphore (acpi_gbl_global_lock_semaphore,
+			  timeout);
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_release_global_lock
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Releases ownership of the Global Lock.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_release_global_lock (void)
+{
+	u8                              pending = FALSE;
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("ev_release_global_lock");
+
+
+	if (!acpi_gbl_global_lock_thread_count) {
+		ACPI_REPORT_WARNING(("Cannot release HW Global Lock, it has not been acquired\n"));
+		return_ACPI_STATUS (AE_NOT_ACQUIRED);
+	}
+
+	/* One fewer thread has the global lock */
+
+	acpi_gbl_global_lock_thread_count--;
+	if (acpi_gbl_global_lock_thread_count) {
+		/* There are still some threads holding the lock, cannot release */
+
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/*
+	 * No more threads holding lock, we can do the actual hardware
+	 * release
+	 */
+	ACPI_RELEASE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, pending);
+	acpi_gbl_global_lock_acquired = FALSE;
+
+	/*
+	 * If the pending bit was set, we must write GBL_RLS to the control
+	 * register
+	 */
+	if (pending) {
+		status = acpi_set_register (ACPI_BITREG_GLOBAL_LOCK_RELEASE, 1, ACPI_MTX_LOCK);
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_terminate
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      none
+ *
+ * DESCRIPTION: Disable events and free memory allocated for table storage.
+ *
+ ******************************************************************************/
+
+void
+acpi_ev_terminate (void)
+{
+	acpi_native_uint                i;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ev_terminate");
+
+
+	if (acpi_gbl_events_initialized) {
+		/*
+		 * Disable all event-related functionality.
+		 * In all cases, on error, print a message but obviously we don't abort.
+		 */
+
+		/* Disable all fixed events */
+
+		for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
+			status = acpi_disable_event ((u32) i, 0);
+			if (ACPI_FAILURE (status)) {
+				ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not disable fixed event %d\n", (u32) i));
+			}
+		}
+
+		/* Disable all GPEs in all GPE blocks */
+
+		status = acpi_ev_walk_gpe_list (acpi_hw_disable_gpe_block, ACPI_NOT_ISR);
+
+		/* Remove SCI handler */
+
+		status = acpi_ev_remove_sci_handler ();
+		if (ACPI_FAILURE(status)) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not remove SCI handler\n"));
+		}
+	}
+
+	/* Deallocate all handler objects installed within GPE info structs */
+
+	status = acpi_ev_walk_gpe_list (acpi_ev_delete_gpe_handlers, ACPI_NOT_ISR);
+
+	/* Return to original mode if necessary */
+
+	if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) {
+		status = acpi_disable ();
+		if (ACPI_FAILURE (status)) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "acpi_disable failed\n"));
+		}
+	}
+	return_VOID;
+}
+

drivers/acpi/events/evrgnini.c

@@ -0,0 +1,580 @@
+/******************************************************************************
+ *
+ * Module Name: evrgnini- ACPI address_space (op_region) init
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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 <acpi/acevents.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT          ACPI_EVENTS
+	 ACPI_MODULE_NAME    ("evrgnini")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_system_memory_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Do any prep work for region handling, a nop for now
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_system_memory_region_setup (
+	acpi_handle                     handle,
+	u32                             function,
+	void                            *handler_context,
+	void                            **region_context)
+{
+	union acpi_operand_object       *region_desc = (union acpi_operand_object *) handle;
+	struct acpi_mem_space_context   *local_region_context;
+
+
+	ACPI_FUNCTION_TRACE ("ev_system_memory_region_setup");
+
+
+	if (function == ACPI_REGION_DEACTIVATE) {
+		if (*region_context) {
+			ACPI_MEM_FREE (*region_context);
+			*region_context = NULL;
+		}
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/* Create a new context */
+
+	local_region_context = ACPI_MEM_CALLOCATE (sizeof (struct acpi_mem_space_context));
+	if (!(local_region_context)) {
+		return_ACPI_STATUS (AE_NO_MEMORY);
+	}
+
+	/* Save the region length and address for use in the handler */
+
+	local_region_context->length = region_desc->region.length;
+	local_region_context->address = region_desc->region.address;
+
+	*region_context = local_region_context;
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_io_space_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Do any prep work for region handling
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_io_space_region_setup (
+	acpi_handle                     handle,
+	u32                             function,
+	void                            *handler_context,
+	void                            **region_context)
+{
+	ACPI_FUNCTION_TRACE ("ev_io_space_region_setup");
+
+
+	if (function == ACPI_REGION_DEACTIVATE) {
+		*region_context = NULL;
+	}
+	else {
+		*region_context = handler_context;
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_pci_config_region_setup
+ *
+ * PARAMETERS:  Handle             - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Do any prep work for region handling
+ *
+ * MUTEX:       Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_pci_config_region_setup (
+	acpi_handle                     handle,
+	u32                             function,
+	void                            *handler_context,
+	void                            **region_context)
+{
+	acpi_status                     status = AE_OK;
+	acpi_integer                    pci_value;
+	struct acpi_pci_id              *pci_id = *region_context;
+	union acpi_operand_object       *handler_obj;
+	struct acpi_namespace_node      *parent_node;
+	struct acpi_namespace_node      *pci_root_node;
+	union acpi_operand_object       *region_obj = (union acpi_operand_object   *) handle;
+	struct acpi_device_id           object_hID;
+
+
+	ACPI_FUNCTION_TRACE ("ev_pci_config_region_setup");
+
+
+	handler_obj = region_obj->region.handler;
+	if (!handler_obj) {
+		/*
+		 * No installed handler. This shouldn't happen because the dispatch
+		 * routine checks before we get here, but we check again just in case.
+		 */
+		ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+			"Attempting to init a region %p, with no handler\n", region_obj));
+		return_ACPI_STATUS (AE_NOT_EXIST);
+	}
+
+	*region_context = NULL;
+	if (function == ACPI_REGION_DEACTIVATE) {
+		if (pci_id) {
+			ACPI_MEM_FREE (pci_id);
+		}
+		return_ACPI_STATUS (status);
+	}
+
+	parent_node = acpi_ns_get_parent_node (region_obj->region.node);
+
+	/*
+	 * Get the _SEG and _BBN values from the device upon which the handler
+	 * is installed.
+	 *
+	 * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
+	 * This is the device the handler has been registered to handle.
+	 */
+
+	/*
+	 * If the address_space.Node is still pointing to the root, we need
+	 * to scan upward for a PCI Root bridge and re-associate the op_region
+	 * handlers with that device.
+	 */
+	if (handler_obj->address_space.node == acpi_gbl_root_node) {
+		/* Start search from the parent object */
+
+		pci_root_node = parent_node;
+		while (pci_root_node != acpi_gbl_root_node) {
+			status = acpi_ut_execute_HID (pci_root_node, &object_hID);
+			if (ACPI_SUCCESS (status)) {
+				/* Got a valid _HID, check if this is a PCI root */
+
+				if (!(ACPI_STRNCMP (object_hID.value, PCI_ROOT_HID_STRING,
+						   sizeof (PCI_ROOT_HID_STRING)))) {
+					/* Install a handler for this PCI root bridge */
+
+					status = acpi_install_address_space_handler ((acpi_handle) pci_root_node,
+							   ACPI_ADR_SPACE_PCI_CONFIG,
+							   ACPI_DEFAULT_HANDLER, NULL, NULL);
+					if (ACPI_FAILURE (status)) {
+						if (status == AE_SAME_HANDLER) {
+							/*
+							 * It is OK if the handler is already installed on the root
+							 * bridge.  Still need to return a context object for the
+							 * new PCI_Config operation region, however.
+							 */
+							status = AE_OK;
+						}
+						else {
+							ACPI_REPORT_ERROR ((
+								"Could not install pci_config handler for Root Bridge %4.4s, %s\n",
+								acpi_ut_get_node_name (pci_root_node), acpi_format_exception (status)));
+						}
+					}
+					break;
+				}
+			}
+
+			pci_root_node = acpi_ns_get_parent_node (pci_root_node);
+		}
+
+		/* PCI root bridge not found, use namespace root node */
+	}
+	else {
+		pci_root_node = handler_obj->address_space.node;
+	}
+
+	/*
+	 * If this region is now initialized, we are done.
+	 * (install_address_space_handler could have initialized it)
+	 */
+	if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/* Region is still not initialized. Create a new context */
+
+	pci_id = ACPI_MEM_CALLOCATE (sizeof (struct acpi_pci_id));
+	if (!pci_id) {
+		return_ACPI_STATUS (AE_NO_MEMORY);
+	}
+
+	/*
+	 * For PCI_Config space access, we need the segment, bus,
+	 * device and function numbers.  Acquire them here.
+	 */
+
+	/*
+	 * Get the PCI device and function numbers from the _ADR object
+	 * contained in the parent's scope.
+	 */
+	status = acpi_ut_evaluate_numeric_object (METHOD_NAME__ADR, parent_node, &pci_value);
+
+	/*
+	 * The default is zero, and since the allocation above zeroed
+	 * the data, just do nothing on failure.
+	 */
+	if (ACPI_SUCCESS (status)) {
+		pci_id->device  = ACPI_HIWORD (ACPI_LODWORD (pci_value));
+		pci_id->function = ACPI_LOWORD (ACPI_LODWORD (pci_value));
+	}
+
+	/* The PCI segment number comes from the _SEG method */
+
+	status = acpi_ut_evaluate_numeric_object (METHOD_NAME__SEG, pci_root_node, &pci_value);
+	if (ACPI_SUCCESS (status)) {
+		pci_id->segment = ACPI_LOWORD (pci_value);
+	}
+
+	/* The PCI bus number comes from the _BBN method */
+
+	status = acpi_ut_evaluate_numeric_object (METHOD_NAME__BBN, pci_root_node, &pci_value);
+	if (ACPI_SUCCESS (status)) {
+		pci_id->bus = ACPI_LOWORD (pci_value);
+	}
+
+	/* Complete this device's pci_id */
+
+	acpi_os_derive_pci_id (pci_root_node, region_obj->region.node, &pci_id);
+
+	*region_context = pci_id;
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_pci_bar_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Do any prep work for region handling
+ *
+ * MUTEX:       Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_pci_bar_region_setup (
+	acpi_handle                     handle,
+	u32                             function,
+	void                            *handler_context,
+	void                            **region_context)
+{
+	ACPI_FUNCTION_TRACE ("ev_pci_bar_region_setup");
+
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_cmos_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Do any prep work for region handling
+ *
+ * MUTEX:       Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_cmos_region_setup (
+	acpi_handle                     handle,
+	u32                             function,
+	void                            *handler_context,
+	void                            **region_context)
+{
+	ACPI_FUNCTION_TRACE ("ev_cmos_region_setup");
+
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_default_region_setup
+ *
+ * PARAMETERS:  Handle              - Region we are interested in
+ *              Function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Do any prep work for region handling
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_default_region_setup (
+	acpi_handle                     handle,
+	u32                             function,
+	void                            *handler_context,
+	void                            **region_context)
+{
+	ACPI_FUNCTION_TRACE ("ev_default_region_setup");
+
+
+	if (function == ACPI_REGION_DEACTIVATE) {
+		*region_context = NULL;
+	}
+	else {
+		*region_context = handler_context;
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_initialize_region
+ *
+ * PARAMETERS:  region_obj      - Region we are initializing
+ *              acpi_ns_locked  - Is namespace locked?
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
+ *              for execution at a later time
+ *
+ *              Get the appropriate address space handler for a newly
+ *              created region.
+ *
+ *              This also performs address space specific initialization.  For
+ *              example, PCI regions must have an _ADR object that contains
+ *              a PCI address in the scope of the definition.  This address is
+ *              required to perform an access to PCI config space.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_initialize_region (
+	union acpi_operand_object       *region_obj,
+	u8                              acpi_ns_locked)
+{
+	union acpi_operand_object       *handler_obj;
+	union acpi_operand_object       *obj_desc;
+	acpi_adr_space_type             space_id;
+	struct acpi_namespace_node      *node;
+	acpi_status                     status;
+	struct acpi_namespace_node      *method_node;
+	acpi_name                       *reg_name_ptr = (acpi_name *) METHOD_NAME__REG;
+	union acpi_operand_object       *region_obj2;
+
+
+	ACPI_FUNCTION_TRACE_U32 ("ev_initialize_region", acpi_ns_locked);
+
+
+	if (!region_obj) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	region_obj2 = acpi_ns_get_secondary_object (region_obj);
+	if (!region_obj2) {
+		return_ACPI_STATUS (AE_NOT_EXIST);
+	}
+
+	node = acpi_ns_get_parent_node (region_obj->region.node);
+	space_id = region_obj->region.space_id;
+
+	/* Setup defaults */
+
+	region_obj->region.handler = NULL;
+	region_obj2->extra.method_REG = NULL;
+	region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE);
+	region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
+
+	/* Find any "_REG" method associated with this region definition */
+
+	status = acpi_ns_search_node (*reg_name_ptr, node,
+			  ACPI_TYPE_METHOD, &method_node);
+	if (ACPI_SUCCESS (status)) {
+		/*
+		 * The _REG method is optional and there can be only one per region
+		 * definition.  This will be executed when the handler is attached
+		 * or removed
+		 */
+		region_obj2->extra.method_REG = method_node;
+	}
+
+	/*
+	 * The following loop depends upon the root Node having no parent
+	 * ie: acpi_gbl_root_node->parent_entry being set to NULL
+	 */
+	while (node) {
+		/* Check to see if a handler exists */
+
+		handler_obj = NULL;
+		obj_desc = acpi_ns_get_attached_object (node);
+		if (obj_desc) {
+			/* Can only be a handler if the object exists */
+
+			switch (node->type) {
+			case ACPI_TYPE_DEVICE:
+
+				handler_obj = obj_desc->device.handler;
+				break;
+
+			case ACPI_TYPE_PROCESSOR:
+
+				handler_obj = obj_desc->processor.handler;
+				break;
+
+			case ACPI_TYPE_THERMAL:
+
+				handler_obj = obj_desc->thermal_zone.handler;
+				break;
+
+			default:
+				/* Ignore other objects */
+				break;
+			}
+
+			while (handler_obj) {
+				/* Is this handler of the correct type? */
+
+				if (handler_obj->address_space.space_id == space_id) {
+					/* Found correct handler */
+
+					ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+						"Found handler %p for region %p in obj %p\n",
+						handler_obj, region_obj, obj_desc));
+
+					status = acpi_ev_attach_region (handler_obj, region_obj,
+							 acpi_ns_locked);
+
+					/*
+					 * Tell all users that this region is usable by running the _REG
+					 * method
+					 */
+					if (acpi_ns_locked) {
+						status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+						if (ACPI_FAILURE (status)) {
+							return_ACPI_STATUS (status);
+						}
+					}
+
+					status = acpi_ev_execute_reg_method (region_obj, 1);
+
+					if (acpi_ns_locked) {
+						status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+						if (ACPI_FAILURE (status)) {
+							return_ACPI_STATUS (status);
+						}
+					}
+
+					return_ACPI_STATUS (AE_OK);
+				}
+
+				/* Try next handler in the list */
+
+				handler_obj = handler_obj->address_space.next;
+			}
+		}
+
+		/*
+		 * This node does not have the handler we need;
+		 * Pop up one level
+		 */
+		node = acpi_ns_get_parent_node (node);
+	}
+
+	/* If we get here, there is no handler for this region */
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+		"No handler for region_type %s(%X) (region_obj %p)\n",
+		acpi_ut_get_region_name (space_id), space_id, region_obj));
+
+	return_ACPI_STATUS (AE_NOT_EXIST);
+}
+

drivers/acpi/events/evsci.c

@@ -0,0 +1,199 @@
+/*******************************************************************************
+ *
+ * Module Name: evsci - System Control Interrupt configuration and
+ *                      legacy to ACPI mode state transition functions
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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 <acpi/acevents.h>
+
+
+#define _COMPONENT          ACPI_EVENTS
+	 ACPI_MODULE_NAME    ("evsci")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_sci_xrupt_handler
+ *
+ * PARAMETERS:  Context   - Calling Context
+ *
+ * RETURN:      Status code indicates whether interrupt was handled.
+ *
+ * DESCRIPTION: Interrupt handler that will figure out what function or
+ *              control method to call to deal with a SCI.
+ *
+ ******************************************************************************/
+
+static u32 ACPI_SYSTEM_XFACE
+acpi_ev_sci_xrupt_handler (
+	void                            *context)
+{
+	struct acpi_gpe_xrupt_info      *gpe_xrupt_list = context;
+	u32                             interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
+
+
+	ACPI_FUNCTION_TRACE("ev_sci_xrupt_handler");
+
+
+	/*
+	 * We are guaranteed by the ACPI CA initialization/shutdown code that
+	 * if this interrupt handler is installed, ACPI is enabled.
+	 */
+
+	/*
+	 * Fixed Events:
+	 * Check for and dispatch any Fixed Events that have occurred
+	 */
+	interrupt_handled |= acpi_ev_fixed_event_detect ();
+
+	/*
+	 * General Purpose Events:
+	 * Check for and dispatch any GPEs that have occurred
+	 */
+	interrupt_handled |= acpi_ev_gpe_detect (gpe_xrupt_list);
+
+	return_VALUE (interrupt_handled);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_gpe_xrupt_handler
+ *
+ * PARAMETERS:  Context   - Calling Context
+ *
+ * RETURN:      Status code indicates whether interrupt was handled.
+ *
+ * DESCRIPTION: Handler for GPE Block Device interrupts
+ *
+ ******************************************************************************/
+
+u32 ACPI_SYSTEM_XFACE
+acpi_ev_gpe_xrupt_handler (
+	void                            *context)
+{
+	struct acpi_gpe_xrupt_info      *gpe_xrupt_list = context;
+	u32                             interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
+
+
+	ACPI_FUNCTION_TRACE("ev_gpe_xrupt_handler");
+
+
+	/*
+	 * We are guaranteed by the ACPI CA initialization/shutdown code that
+	 * if this interrupt handler is installed, ACPI is enabled.
+	 */
+
+	/*
+	 * GPEs:
+	 * Check for and dispatch any GPEs that have occurred
+	 */
+	interrupt_handled |= acpi_ev_gpe_detect (gpe_xrupt_list);
+
+	return_VALUE (interrupt_handled);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_sci_handler
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Installs SCI handler.
+ *
+ ******************************************************************************/
+
+u32
+acpi_ev_install_sci_handler (void)
+{
+	u32                             status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("ev_install_sci_handler");
+
+
+	status = acpi_os_install_interrupt_handler ((u32) acpi_gbl_FADT->sci_int,
+			   acpi_ev_sci_xrupt_handler, acpi_gbl_gpe_xrupt_list_head);
+	return_ACPI_STATUS (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_remove_sci_handler
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      E_OK if handler uninstalled OK, E_ERROR if handler was not
+ *              installed to begin with
+ *
+ * DESCRIPTION: Remove the SCI interrupt handler.  No further SCIs will be
+ *              taken.
+ *
+ * Note:  It doesn't seem important to disable all events or set the event
+ *        enable registers to their original values.  The OS should disable
+ *        the SCI interrupt level when the handler is removed, so no more
+ *        events will come in.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_remove_sci_handler (void)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ev_remove_sci_handler");
+
+
+	/* Just let the OS remove the handler and disable the level */
+
+	status = acpi_os_remove_interrupt_handler ((u32) acpi_gbl_FADT->sci_int,
+			   acpi_ev_sci_xrupt_handler);
+
+	return_ACPI_STATUS (status);
+}
+
+

drivers/acpi/events/evxface.c

@@ -0,0 +1,834 @@
+/******************************************************************************
+ *
+ * Module Name: evxface - External interfaces for ACPI events
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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 <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acevents.h>
+#include <acpi/acinterp.h>
+
+#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);
+}
+#endif  /*  ACPI_FUTURE_USAGE  */
+
+
+/*******************************************************************************
+ *
+ * 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_DEBUG_PRINT ((ACPI_DB_WARN, "Could not enable fixed event.\n"));
+
+		/* 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);
+}
+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_DEBUG_PRINT ((ACPI_DB_WARN,
+			"Could not write to fixed event enable register.\n"));
+	}
+	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);
+}
+EXPORT_SYMBOL(acpi_remove_fixed_event_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_notify_handler
+ *
+ * PARAMETERS:  Device          - The device for which notifies will be handled
+ *              handler_type    - The type of handler:
+ *                                  ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
+ *                                  ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
+ *                                  ACPI_ALL_NOTIFY:  both system and device
+ *              Handler         - Address of the handler
+ *              Context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for notifies on an ACPI device
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_notify_handler (
+	acpi_handle                     device,
+	u32                             handler_type,
+	acpi_notify_handler             handler,
+	void                            *context)
+{
+	union acpi_operand_object       *obj_desc;
+	union acpi_operand_object       *notify_obj;
+	struct acpi_namespace_node      *node;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_install_notify_handler");
+
+
+	/* Parameter validation */
+
+	if ((!device)  ||
+		(!handler) ||
+		(handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Convert and validate the device handle */
+
+	node = acpi_ns_map_handle_to_node (device);
+	if (!node) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/*
+	 * Root Object:
+	 * Registering a notify handler on the root object indicates that the
+	 * caller wishes to receive notifications for all objects.  Note that
+	 * only one <external> global handler can be regsitered (per notify type).
+	 */
+	if (device == ACPI_ROOT_OBJECT) {
+		/* Make sure the handler is not already installed */
+
+		if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
+				acpi_gbl_system_notify.handler)     ||
+			((handler_type & ACPI_DEVICE_NOTIFY) &&
+				acpi_gbl_device_notify.handler)) {
+			status = AE_ALREADY_EXISTS;
+			goto unlock_and_exit;
+		}
+
+		if (handler_type & ACPI_SYSTEM_NOTIFY) {
+			acpi_gbl_system_notify.node  = node;
+			acpi_gbl_system_notify.handler = handler;
+			acpi_gbl_system_notify.context = context;
+		}
+
+		if (handler_type & ACPI_DEVICE_NOTIFY) {
+			acpi_gbl_device_notify.node  = node;
+			acpi_gbl_device_notify.handler = handler;
+			acpi_gbl_device_notify.context = context;
+		}
+
+		/* Global notify handler installed */
+	}
+
+	/*
+	 * All Other Objects:
+	 * Caller will only receive notifications specific to the target object.
+	 * Note that only certain object types can receive notifications.
+	 */
+	else {
+		/* Notifies allowed on this object? */
+
+		if (!acpi_ev_is_notify_object (node)) {
+			status = AE_TYPE;
+			goto unlock_and_exit;
+		}
+
+		/* Check for an existing internal object */
+
+		obj_desc = acpi_ns_get_attached_object (node);
+		if (obj_desc) {
+			/* Object exists - make sure there's no handler */
+
+			if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
+					obj_desc->common_notify.system_notify) ||
+				((handler_type & ACPI_DEVICE_NOTIFY) &&
+					obj_desc->common_notify.device_notify)) {
+				status = AE_ALREADY_EXISTS;
+				goto unlock_and_exit;
+			}
+		}
+		else {
+			/* Create a new object */
+
+			obj_desc = acpi_ut_create_internal_object (node->type);
+			if (!obj_desc) {
+				status = AE_NO_MEMORY;
+				goto unlock_and_exit;
+			}
+
+			/* Attach new object to the Node */
+
+			status = acpi_ns_attach_object (device, obj_desc, node->type);
+
+			/* Remove local reference to the object */
+
+			acpi_ut_remove_reference (obj_desc);
+			if (ACPI_FAILURE (status)) {
+				goto unlock_and_exit;
+			}
+		}
+
+		/* Install the handler */
+
+		notify_obj = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_NOTIFY);
+		if (!notify_obj) {
+			status = AE_NO_MEMORY;
+			goto unlock_and_exit;
+		}
+
+		notify_obj->notify.node   = node;
+		notify_obj->notify.handler = handler;
+		notify_obj->notify.context = context;
+
+		if (handler_type & ACPI_SYSTEM_NOTIFY) {
+			obj_desc->common_notify.system_notify = notify_obj;
+		}
+
+		if (handler_type & ACPI_DEVICE_NOTIFY) {
+			obj_desc->common_notify.device_notify = notify_obj;
+		}
+
+		if (handler_type == ACPI_ALL_NOTIFY) {
+			/* Extra ref if installed in both */
+
+			acpi_ut_add_reference (notify_obj);
+		}
+	}
+
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_install_notify_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_notify_handler
+ *
+ * PARAMETERS:  Device          - The device for which notifies will be handled
+ *              handler_type    - The type of handler:
+ *                                  ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
+ *                                  ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
+ *                                  ACPI_ALL_NOTIFY:  both system and device
+ *              Handler         - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a handler for notifies on an ACPI device
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_remove_notify_handler (
+	acpi_handle                     device,
+	u32                             handler_type,
+	acpi_notify_handler             handler)
+{
+	union acpi_operand_object       *notify_obj;
+	union acpi_operand_object       *obj_desc;
+	struct acpi_namespace_node      *node;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_remove_notify_handler");
+
+
+	/* Parameter validation */
+
+	if ((!device)  ||
+		(!handler) ||
+		(handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Convert and validate the device handle */
+
+	node = acpi_ns_map_handle_to_node (device);
+	if (!node) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Root Object */
+
+	if (device == ACPI_ROOT_OBJECT) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Removing notify handler for ROOT object.\n"));
+
+		if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
+			  !acpi_gbl_system_notify.handler)      ||
+			((handler_type & ACPI_DEVICE_NOTIFY) &&
+			  !acpi_gbl_device_notify.handler)) {
+			status = AE_NOT_EXIST;
+			goto unlock_and_exit;
+		}
+
+		/* Make sure all deferred tasks are completed */
+
+		(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+		acpi_os_wait_events_complete(NULL);
+		status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+ 		}
+
+		if (handler_type & ACPI_SYSTEM_NOTIFY) {
+			acpi_gbl_system_notify.node  = NULL;
+			acpi_gbl_system_notify.handler = NULL;
+			acpi_gbl_system_notify.context = NULL;
+		}
+
+		if (handler_type & ACPI_DEVICE_NOTIFY) {
+			acpi_gbl_device_notify.node  = NULL;
+			acpi_gbl_device_notify.handler = NULL;
+			acpi_gbl_device_notify.context = NULL;
+		}
+	}
+
+	/* All Other Objects */
+
+	else {
+		/* Notifies allowed on this object? */
+
+		if (!acpi_ev_is_notify_object (node)) {
+			status = AE_TYPE;
+			goto unlock_and_exit;
+		}
+
+		/* Check for an existing internal object */
+
+		obj_desc = acpi_ns_get_attached_object (node);
+		if (!obj_desc) {
+			status = AE_NOT_EXIST;
+			goto unlock_and_exit;
+		}
+
+		/* Object exists - make sure there's an existing handler */
+
+		if (handler_type & ACPI_SYSTEM_NOTIFY) {
+			notify_obj = obj_desc->common_notify.system_notify;
+			if ((!notify_obj) ||
+				 (notify_obj->notify.handler != handler)) {
+				status = AE_BAD_PARAMETER;
+				goto unlock_and_exit;
+			}
+			/* Make sure all deferred tasks are completed */
+
+			(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+			acpi_os_wait_events_complete(NULL);
+			status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+			if (ACPI_FAILURE (status)) {
+				return_ACPI_STATUS (status);
+ 			}
+
+			/* Remove the handler */
+			obj_desc->common_notify.system_notify = NULL;
+			acpi_ut_remove_reference (notify_obj);
+		}
+
+		if (handler_type & ACPI_DEVICE_NOTIFY) {
+			notify_obj = obj_desc->common_notify.device_notify;
+			if ((!notify_obj) ||
+				 (notify_obj->notify.handler != handler)) {
+				status = AE_BAD_PARAMETER;
+				goto unlock_and_exit;
+			}
+			/* Make sure all deferred tasks are completed */
+
+			(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+			acpi_os_wait_events_complete(NULL);
+			status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+			if (ACPI_FAILURE (status)) {
+				return_ACPI_STATUS (status);
+ 			}
+
+			/* Remove the handler */
+			obj_desc->common_notify.device_notify = NULL;
+			acpi_ut_remove_reference (notify_obj);
+		}
+	}
+
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_remove_notify_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_gpe_handler
+ *
+ * PARAMETERS:  gpe_number      - The GPE number within the GPE block
+ *              gpe_block       - GPE block (NULL == FADT GPEs)
+ *              Type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              Address         - Address of the handler
+ *              Context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_gpe_handler (
+	acpi_handle                     gpe_device,
+	u32                             gpe_number,
+	u32                             type,
+	acpi_event_handler              address,
+	void                            *context)
+{
+	struct acpi_gpe_event_info      *gpe_event_info;
+	struct acpi_handler_info        *handler;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_install_gpe_handler");
+
+
+	/* Parameter validation */
+
+	if ((!address) || (type > ACPI_GPE_XRUPT_TYPE_MASK)) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Make sure that there isn't a handler there already */
+
+	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_HANDLER) {
+		status = AE_ALREADY_EXISTS;
+		goto unlock_and_exit;
+	}
+
+	/* Allocate and init handler object */
+
+	handler = ACPI_MEM_CALLOCATE (sizeof (struct acpi_handler_info));
+	if (!handler) {
+		status = AE_NO_MEMORY;
+		goto unlock_and_exit;
+	}
+
+	handler->address    = address;
+	handler->context    = context;
+	handler->method_node = gpe_event_info->dispatch.method_node;
+
+	/* Disable the GPE before installing the handler */
+
+	status = acpi_ev_disable_gpe (gpe_event_info);
+	if (ACPI_FAILURE (status)) {
+		goto unlock_and_exit;
+	}
+
+	/* Install the handler */
+
+	acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
+	gpe_event_info->dispatch.handler = handler;
+
+	/* Setup up dispatch flags to indicate handler (vs. method) */
+
+	gpe_event_info->flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); /* Clear bits */
+	gpe_event_info->flags |= (u8) (type | ACPI_GPE_DISPATCH_HANDLER);
+
+	acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
+
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_install_gpe_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_gpe_handler
+ *
+ * PARAMETERS:  gpe_number      - The event to remove a handler
+ *              gpe_block       - GPE block (NULL == FADT GPEs)
+ *              Address         - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a handler for a General Purpose acpi_event.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_remove_gpe_handler (
+	acpi_handle                     gpe_device,
+	u32                             gpe_number,
+	acpi_event_handler              address)
+{
+	struct acpi_gpe_event_info      *gpe_event_info;
+	struct acpi_handler_info        *handler;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_remove_gpe_handler");
+
+
+	/* Parameter validation */
+
+	if (!address) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Make sure that a handler is indeed installed */
+
+	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != ACPI_GPE_DISPATCH_HANDLER) {
+		status = AE_NOT_EXIST;
+		goto unlock_and_exit;
+	}
+
+	/* Make sure that the installed handler is the same */
+
+	if (gpe_event_info->dispatch.handler->address != address) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Disable the GPE before removing the handler */
+
+	status = acpi_ev_disable_gpe (gpe_event_info);
+	if (ACPI_FAILURE (status)) {
+		goto unlock_and_exit;
+	}
+
+	/* Make sure all deferred tasks are completed */
+
+	(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+	acpi_os_wait_events_complete(NULL);
+	status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+ 	}
+
+	/* Remove the handler */
+
+	acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
+	handler = gpe_event_info->dispatch.handler;
+
+	/* Restore Method node (if any), set dispatch flags */
+
+	gpe_event_info->dispatch.method_node = handler->method_node;
+	gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */
+	if (handler->method_node) {
+		gpe_event_info->flags |= ACPI_GPE_DISPATCH_METHOD;
+	}
+	acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
+
+	/* Now we can free the handler object */
+
+	ACPI_MEM_FREE (handler);
+
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_remove_gpe_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_acquire_global_lock
+ *
+ * PARAMETERS:  Timeout         - How long the caller is willing to wait
+ *              out_handle      - A handle to the lock if acquired
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Acquire the ACPI Global Lock
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_acquire_global_lock (
+	u16                             timeout,
+	u32                             *handle)
+{
+	acpi_status                     status;
+
+
+	if (!handle) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ex_enter_interpreter ();
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	status = acpi_ev_acquire_global_lock (timeout);
+	acpi_ex_exit_interpreter ();
+
+	if (ACPI_SUCCESS (status)) {
+		acpi_gbl_global_lock_handle++;
+		*handle = acpi_gbl_global_lock_handle;
+	}
+
+	return (status);
+}
+EXPORT_SYMBOL(acpi_acquire_global_lock);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_release_global_lock
+ *
+ * PARAMETERS:  Handle      - Returned from acpi_acquire_global_lock
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Release the ACPI Global Lock
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_release_global_lock (
+	u32                             handle)
+{
+	acpi_status                     status;
+
+
+	if (handle != acpi_gbl_global_lock_handle) {
+		return (AE_NOT_ACQUIRED);
+	}
+
+	status = acpi_ev_release_global_lock ();
+	return (status);
+}
+EXPORT_SYMBOL(acpi_release_global_lock);
+

drivers/acpi/events/evxfevnt.c

@@ -0,0 +1,778 @@
+/******************************************************************************
+ *
+ * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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 <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/acevents.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT          ACPI_EVENTS
+	 ACPI_MODULE_NAME    ("evxfevnt")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enable
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Transfers the system into ACPI mode.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_enable (void)
+{
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_enable");
+
+
+	/* Make sure we have the FADT*/
+
+	if (!acpi_gbl_FADT) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
+		return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+	}
+
+	if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
+	}
+	else {
+		/* Transition to ACPI mode */
+
+		status = acpi_hw_set_mode (ACPI_SYS_MODE_ACPI);
+		if (ACPI_FAILURE (status)) {
+			ACPI_REPORT_ERROR (("Could not transition to ACPI mode.\n"));
+			return_ACPI_STATUS (status);
+		}
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Transition to ACPI mode successful\n"));
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_disable
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Transfers the system into LEGACY mode.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_disable (void)
+{
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_disable");
+
+
+	if (!acpi_gbl_FADT) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
+		return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+	}
+
+	if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in legacy (non-ACPI) mode\n"));
+	}
+	else {
+		/* Transition to LEGACY mode */
+
+		status = acpi_hw_set_mode (ACPI_SYS_MODE_LEGACY);
+
+		if (ACPI_FAILURE (status)) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not exit ACPI mode to legacy mode"));
+			return_ACPI_STATUS (status);
+		}
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enable_event
+ *
+ * PARAMETERS:  Event           - The fixed eventto be enabled
+ *              Flags           - Reserved
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable an ACPI event (fixed)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_enable_event (
+	u32                             event,
+	u32                             flags)
+{
+	acpi_status                     status = AE_OK;
+	u32                             value;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_enable_event");
+
+
+	/* Decode the Fixed Event */
+
+	if (event > ACPI_EVENT_MAX) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * Enable the requested fixed event (by writing a one to the
+	 * enable register bit)
+	 */
+	status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
+			 1, ACPI_MTX_LOCK);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Make sure that the hardware responded */
+
+	status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
+			  &value, ACPI_MTX_LOCK);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	if (value != 1) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+			"Could not enable %s event\n", acpi_ut_get_event_name (event)));
+		return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
+	}
+
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_enable_event);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_set_gpe_type
+ *
+ * PARAMETERS:  gpe_device      - Parent GPE Device
+ *              gpe_number      - GPE level within the GPE block
+ *              Type            - New GPE type
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable an ACPI event (general purpose)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_set_gpe_type (
+	acpi_handle                     gpe_device,
+	u32                             gpe_number,
+	u8                              type)
+{
+	acpi_status                     status = AE_OK;
+	struct acpi_gpe_event_info      *gpe_event_info;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_set_gpe_type");
+
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) {
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/* Set the new type (will disable GPE if currently enabled) */
+
+	status = acpi_ev_set_gpe_type (gpe_event_info, type);
+
+unlock_and_exit:
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_set_gpe_type);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enable_gpe
+ *
+ * PARAMETERS:  gpe_device      - Parent GPE Device
+ *              gpe_number      - GPE level within the GPE block
+ *              Flags           - Just enable, or also wake enable?
+ *                                Called from ISR or not
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable an ACPI event (general purpose)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_enable_gpe (
+	acpi_handle                     gpe_device,
+	u32                             gpe_number,
+	u32                             flags)
+{
+	acpi_status                     status = AE_OK;
+	struct acpi_gpe_event_info      *gpe_event_info;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_enable_gpe");
+
+
+	/* Use semaphore lock if not executing at interrupt level */
+
+	if (flags & ACPI_NOT_ISR) {
+		status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Perform the enable */
+
+	status = acpi_ev_enable_gpe (gpe_event_info, TRUE);
+
+unlock_and_exit:
+	if (flags & ACPI_NOT_ISR) {
+		(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+	}
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_enable_gpe);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_disable_gpe
+ *
+ * PARAMETERS:  gpe_device      - Parent GPE Device
+ *              gpe_number      - GPE level within the GPE block
+ *              Flags           - Just disable, or also wake disable?
+ *                                Called from ISR or not
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable an ACPI event (general purpose)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_disable_gpe (
+	acpi_handle                     gpe_device,
+	u32                             gpe_number,
+	u32                             flags)
+{
+	acpi_status                     status = AE_OK;
+	struct acpi_gpe_event_info      *gpe_event_info;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_disable_gpe");
+
+
+	/* Use semaphore lock if not executing at interrupt level */
+
+	if (flags & ACPI_NOT_ISR) {
+		status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	status = acpi_ev_disable_gpe (gpe_event_info);
+
+unlock_and_exit:
+	if (flags & ACPI_NOT_ISR) {
+		(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+	}
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_disable_event
+ *
+ * PARAMETERS:  Event           - The fixed eventto be enabled
+ *              Flags           - Reserved
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable an ACPI event (fixed)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_disable_event (
+	u32                             event,
+	u32                             flags)
+{
+	acpi_status                     status = AE_OK;
+	u32                             value;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_disable_event");
+
+
+	/* Decode the Fixed Event */
+
+	if (event > ACPI_EVENT_MAX) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * Disable the requested fixed event (by writing a zero to the
+	 * enable register bit)
+	 */
+	status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
+			 0, ACPI_MTX_LOCK);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
+			 &value, ACPI_MTX_LOCK);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	if (value != 0) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+			"Could not disable %s events\n", acpi_ut_get_event_name (event)));
+		return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
+	}
+
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_disable_event);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_clear_event
+ *
+ * PARAMETERS:  Event           - The fixed event to be cleared
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear an ACPI event (fixed)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_clear_event (
+	u32                             event)
+{
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_clear_event");
+
+
+	/* Decode the Fixed Event */
+
+	if (event > ACPI_EVENT_MAX) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * Clear the requested fixed event (By writing a one to the
+	 * status register bit)
+	 */
+	status = acpi_set_register (acpi_gbl_fixed_event_info[event].status_register_id,
+			1, ACPI_MTX_LOCK);
+
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_clear_event);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_clear_gpe
+ *
+ * PARAMETERS:  gpe_device      - Parent GPE Device
+ *              gpe_number      - GPE level within the GPE block
+ *              Flags           - Called from an ISR or not
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear an ACPI event (general purpose)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_clear_gpe (
+	acpi_handle                     gpe_device,
+	u32                             gpe_number,
+	u32                             flags)
+{
+	acpi_status                     status = AE_OK;
+	struct acpi_gpe_event_info      *gpe_event_info;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_clear_gpe");
+
+
+	/* Use semaphore lock if not executing at interrupt level */
+
+	if (flags & ACPI_NOT_ISR) {
+		status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	status = acpi_hw_clear_gpe (gpe_event_info);
+
+unlock_and_exit:
+	if (flags & ACPI_NOT_ISR) {
+		(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+	}
+	return_ACPI_STATUS (status);
+}
+
+
+#ifdef ACPI_FUTURE_USAGE
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_event_status
+ *
+ * PARAMETERS:  Event           - The fixed event
+ *              Event Status    - Where the current status of the event will
+ *                                be returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Obtains and returns the current status of the event
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_event_status (
+	u32                             event,
+	acpi_event_status               *event_status)
+{
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_get_event_status");
+
+
+	if (!event_status) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/* Decode the Fixed Event */
+
+	if (event > ACPI_EVENT_MAX) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/* Get the status of the requested fixed event */
+
+	status = acpi_get_register (acpi_gbl_fixed_event_info[event].status_register_id,
+			  event_status, ACPI_MTX_LOCK);
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_gpe_status
+ *
+ * PARAMETERS:  gpe_device      - Parent GPE Device
+ *              gpe_number      - GPE level within the GPE block
+ *              Flags           - Called from an ISR or not
+ *              Event Status    - Where the current status of the event will
+ *                                be returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Get status of an event (general purpose)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_gpe_status (
+	acpi_handle                     gpe_device,
+	u32                             gpe_number,
+	u32                             flags,
+	acpi_event_status               *event_status)
+{
+	acpi_status                     status = AE_OK;
+	struct acpi_gpe_event_info      *gpe_event_info;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_get_gpe_status");
+
+
+	/* Use semaphore lock if not executing at interrupt level */
+
+	if (flags & ACPI_NOT_ISR) {
+		status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	/* Ensure that we have a valid GPE number */
+
+	gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
+	if (!gpe_event_info) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Obtain status on the requested GPE number */
+
+	status = acpi_hw_get_gpe_status (gpe_event_info, event_status);
+
+unlock_and_exit:
+	if (flags & ACPI_NOT_ISR) {
+		(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+	}
+	return_ACPI_STATUS (status);
+}
+#endif  /*  ACPI_FUTURE_USAGE  */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_gpe_block
+ *
+ * PARAMETERS:  gpe_device          - Handle to the parent GPE Block Device
+ *              gpe_block_address   - Address and space_iD
+ *              register_count      - Number of GPE register pairs in the block
+ *              interrupt_level     - H/W interrupt for the block
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create and Install a block of GPE registers
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_gpe_block (
+	acpi_handle                     gpe_device,
+	struct acpi_generic_address     *gpe_block_address,
+	u32                             register_count,
+	u32                             interrupt_level)
+{
+	acpi_status                     status;
+	union acpi_operand_object       *obj_desc;
+	struct acpi_namespace_node      *node;
+	struct acpi_gpe_block_info      *gpe_block;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_install_gpe_block");
+
+
+	if ((!gpe_device)      ||
+		(!gpe_block_address) ||
+		(!register_count)) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	node = acpi_ns_map_handle_to_node (gpe_device);
+	if (!node) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/*
+	 * For user-installed GPE Block Devices, the gpe_block_base_number
+	 * is always zero
+	 */
+	status = acpi_ev_create_gpe_block (node, gpe_block_address, register_count,
+			  0, interrupt_level, &gpe_block);
+	if (ACPI_FAILURE (status)) {
+		goto unlock_and_exit;
+	}
+
+	/* Get the device_object attached to the node */
+
+	obj_desc = acpi_ns_get_attached_object (node);
+	if (!obj_desc) {
+		/* No object, create a new one */
+
+		obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_DEVICE);
+		if (!obj_desc) {
+			status = AE_NO_MEMORY;
+			goto unlock_and_exit;
+		}
+
+		status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_DEVICE);
+
+		/* Remove local reference to the object */
+
+		acpi_ut_remove_reference (obj_desc);
+
+		if (ACPI_FAILURE (status)) {
+			goto unlock_and_exit;
+		}
+	}
+
+	/* Install the GPE block in the device_object */
+
+	obj_desc->device.gpe_block = gpe_block;
+
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_install_gpe_block);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_gpe_block
+ *
+ * PARAMETERS:  gpe_device          - Handle to the parent GPE Block Device
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a previously installed block of GPE registers
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_remove_gpe_block (
+	acpi_handle                     gpe_device)
+{
+	union acpi_operand_object       *obj_desc;
+	acpi_status                     status;
+	struct acpi_namespace_node      *node;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_remove_gpe_block");
+
+
+	if (!gpe_device) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	node = acpi_ns_map_handle_to_node (gpe_device);
+	if (!node) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Get the device_object attached to the node */
+
+	obj_desc = acpi_ns_get_attached_object (node);
+	if (!obj_desc ||
+		!obj_desc->device.gpe_block) {
+		return_ACPI_STATUS (AE_NULL_OBJECT);
+	}
+
+	/* Delete the GPE block (but not the device_object) */
+
+	status = acpi_ev_delete_gpe_block (obj_desc->device.gpe_block);
+	if (ACPI_SUCCESS (status)) {
+		obj_desc->device.gpe_block = NULL;
+	}
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_remove_gpe_block);

drivers/acpi/events/evxfregn.c

@@ -0,0 +1,247 @@
+/******************************************************************************
+ *
+ * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
+ *                         Address Spaces.
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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 <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acevents.h>
+
+#define _COMPONENT          ACPI_EVENTS
+	 ACPI_MODULE_NAME    ("evxfregn")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_address_space_handler
+ *
+ * PARAMETERS:  Device          - Handle for the device
+ *              space_id        - The address space ID
+ *              Handler         - Address of the handler
+ *              Setup           - Address of the setup function
+ *              Context         - Value passed to the handler on each access
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for all op_regions of a given space_id.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_address_space_handler (
+	acpi_handle                     device,
+	acpi_adr_space_type             space_id,
+	acpi_adr_space_handler          handler,
+	acpi_adr_space_setup            setup,
+	void                            *context)
+{
+	struct acpi_namespace_node      *node;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_install_address_space_handler");
+
+
+	/* Parameter validation */
+
+	if (!device) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Convert and validate the device handle */
+
+	node = acpi_ns_map_handle_to_node (device);
+	if (!node) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Install the handler for all Regions for this Space ID */
+
+	status = acpi_ev_install_space_handler (node, space_id, handler, setup, context);
+	if (ACPI_FAILURE (status)) {
+		goto unlock_and_exit;
+	}
+
+	/* Run all _REG methods for this address space */
+
+	status = acpi_ev_execute_reg_methods (node, space_id);
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_install_address_space_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_address_space_handler
+ *
+ * PARAMETERS:  Device          - Handle for the device
+ *              space_id        - The address space ID
+ *              Handler         - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a previously installed handler.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_remove_address_space_handler (
+	acpi_handle                     device,
+	acpi_adr_space_type             space_id,
+	acpi_adr_space_handler          handler)
+{
+	union acpi_operand_object       *obj_desc;
+	union acpi_operand_object       *handler_obj;
+	union acpi_operand_object       *region_obj;
+	union acpi_operand_object       **last_obj_ptr;
+	struct acpi_namespace_node      *node;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_remove_address_space_handler");
+
+
+	/* Parameter validation */
+
+	if (!device) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Convert and validate the device handle */
+
+	node = acpi_ns_map_handle_to_node (device);
+	if (!node) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	/* Make sure the internal object exists */
+
+	obj_desc = acpi_ns_get_attached_object (node);
+	if (!obj_desc) {
+		status = AE_NOT_EXIST;
+		goto unlock_and_exit;
+	}
+
+	/* Find the address handler the user requested */
+
+	handler_obj = obj_desc->device.handler;
+	last_obj_ptr = &obj_desc->device.handler;
+	while (handler_obj) {
+		/* We have a handler, see if user requested this one */
+
+		if (handler_obj->address_space.space_id == space_id) {
+			/* Matched space_id, first dereference this in the Regions */
+
+			ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+				"Removing address handler %p(%p) for region %s on Device %p(%p)\n",
+				handler_obj, handler, acpi_ut_get_region_name (space_id),
+				node, obj_desc));
+
+			region_obj = handler_obj->address_space.region_list;
+
+			/* Walk the handler's region list */
+
+			while (region_obj) {
+				/*
+				 * First disassociate the handler from the region.
+				 *
+				 * NOTE: this doesn't mean that the region goes away
+				 * The region is just inaccessible as indicated to
+				 * the _REG method
+				 */
+				acpi_ev_detach_region (region_obj, TRUE);
+
+				/*
+				 * Walk the list: Just grab the head because the
+				 * detach_region removed the previous head.
+				 */
+				region_obj = handler_obj->address_space.region_list;
+
+			}
+
+			/* Remove this Handler object from the list */
+
+			*last_obj_ptr = handler_obj->address_space.next;
+
+			/* Now we can delete the handler object */
+
+			acpi_ut_remove_reference (handler_obj);
+			goto unlock_and_exit;
+		}
+
+		/* Walk the linked list of handlers */
+
+		last_obj_ptr = &handler_obj->address_space.next;
+		handler_obj = handler_obj->address_space.next;
+	}
+
+	/* The handler does not exist */
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+		"Unable to remove address handler %p for %s(%X), dev_node %p, obj %p\n",
+		handler, acpi_ut_get_region_name (space_id), space_id, node, obj_desc));
+
+	status = AE_NOT_EXIST;
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_remove_address_space_handler);
+