path: root/drivers/acpi/events/evgpeblk.c

/******************************************************************************
 *
 * Module Name: evgpeblk - GPE block creation and initialization.
 *
 *****************************************************************************/

/*
 * 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    ("evgpeblk")

/* Local prototypes */

static acpi_status
acpi_ev_save_method_info (
	acpi_handle                     obj_handle,
	u32                             level,
	void                            *obj_desc,
	void                            **return_value);

static acpi_status
acpi_ev_match_prw_and_gpe (
	acpi_handle                     obj_handle,
	u32                             level,
	void                            *info,
	void                            **return_value);

static struct acpi_gpe_xrupt_info *
acpi_ev_get_gpe_xrupt_block (
	u32                             interrupt_level);

static acpi_status
acpi_ev_delete_gpe_xrupt (
	struct acpi_gpe_xrupt_info      *gpe_xrupt);

static acpi_status
acpi_ev_install_gpe_block (
	struct acpi_gpe_block_info      *gpe_block,
	u32                             interrupt_level);

static acpi_status
acpi_ev_create_gpe_info_blocks (
	struct acpi_gpe_block_info      *gpe_block);


/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_valid_gpe_event
 *
 * PARAMETERS:  gpe_event_info              - Info for this GPE
 *
 * RETURN:      TRUE if the gpe_event is valid
 *
 * DESCRIPTION: Validate a GPE event.  DO NOT CALL FROM INTERRUPT LEVEL.
 *              Should be called only when the GPE lists are semaphore locked
 *              and not subject to change.
 *
 ******************************************************************************/

u8
acpi_ev_valid_gpe_event (
	struct acpi_gpe_event_info      *gpe_event_info)
{
	struct acpi_gpe_xrupt_info      *gpe_xrupt_block;
	struct acpi_gpe_block_info      *gpe_block;


	ACPI_FUNCTION_ENTRY ();


	/* No need for spin lock since we are not changing any list elements */

	/* Walk the GPE interrupt levels */

	gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
	while (gpe_xrupt_block) {
		gpe_block = gpe_xrupt_block->gpe_block_list_head;

		/* Walk the GPE blocks on this interrupt level */

		while (gpe_block) {
			if ((&gpe_block->event_info[0] <= gpe_event_info) &&
				(&gpe_block->event_info[((acpi_size) gpe_block->register_count) * 8] > gpe_event_info)) {
				return (TRUE);
			}

			gpe_block = gpe_block->next;
		}

		gpe_xrupt_block = gpe_xrupt_block->next;
	}

	return (FALSE);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_walk_gpe_list
 *
 * PARAMETERS:  gpe_walk_callback   - Routine called for each GPE block
 *              Flags               - ACPI_NOT_ISR or ACPI_ISR
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Walk the GPE lists.
 *
 ******************************************************************************/

acpi_status
acpi_ev_walk_gpe_list (
	ACPI_GPE_CALLBACK       gpe_walk_callback,
	u32                             flags)
{
	struct acpi_gpe_block_info      *gpe_block;
	struct acpi_gpe_xrupt_info      *gpe_xrupt_info;
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE ("ev_walk_gpe_list");


	acpi_os_acquire_lock (acpi_gbl_gpe_lock, flags);

	/* Walk the interrupt level descriptor list */

	gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
	while (gpe_xrupt_info) {
		/* Walk all Gpe Blocks attached to this interrupt level */

		gpe_block = gpe_xrupt_info->gpe_block_list_head;
		while (gpe_block) {
			/* One callback per GPE block */

			status = gpe_walk_callback (gpe_xrupt_info,